US Pat. No. 9,605,414

WORKING VEHICLE AND CONTROL METHOD THEREFOR

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine;
a variable displacement hydraulic pump driven by the engine;
a work implement driven by hydraulic fluid discharged from the hydraulic pump;
a pump displacement control device for controlling the displacement of the hydraulic pump;
a pump pressure detector for detecting a discharge pressure from the hydraulic pump;
a relief valve which opens when the discharge pressure from the hydraulic pump reaches or exceeds a prescribed relief pressure;
a travel device allowing the vehicle to travel;
a power transmission device into which drive power from the engine enters so that the power transmission device outputs the
drive power for driving the travel device;

an accelerator operation member;
a work implement operation member; and
a controller for controlling the power transmission device;
the controller including
a transmission requirement setting unit for setting a required traction force that is a target traction force for the travel
device on the basis of an amount the accelerator operation member is operated;

a work implement requirement setting unit for setting a required flow rate that is a target flow rate in the work implement
on the basis of an amount the work implement operation member is operated;

an engine requirement setting unit for determining a horsepower required from the engine on the basis of a horsepower required
by the transmission and a horsepower required by the work implement, the horsepower required by the transmission being set
on the basis of the required traction force and the horsepower required by the work implement being set on the basis of the
required flow rate;

a required throttle setting unit for setting a commanded throttle value sent to the engine on the basis of the horsepower
required from the engine; and

a pump displacement setting unit for setting a target displacement for the hydraulic pump on the basis of the required flow
rate; and

the work implement requirement setting unit setting an upper limit for the required flow rate to a prescribed flow rate limit
value when the discharge pressure of the hydraulic pump is at or above a prescribed pressure threshold.

US Pat. No. 9,389,146

MALFUNCTION-DETERMINING DEVICE FOR EXHAUST GAS PURIFYING DEVICE AND MALFUNCTION-DETERMINING METHOD FOR EXHAUST GAS PURIFYING DEVICE

Komatsu Ltd., Tokyo (JP)...

1. A malfunction-determining device for an exhaust gas purifying device, the exhaust gas purifying device comprising: a filter
device being provided in an exhaust passage for exhaust gas exhausted from an internal combustion engine to remove a residual
substance in the exhaust gas; and a pressure measuring device being provided to the filter device to measure a pressure of
the exhaust gas, the malfunction-determining device comprising:
a usability determiner being configured to determine whether or not the pressure measuring device is usable based on the pressure
measured by the pressure measuring device and an exhaust gas flow rate;

a frozen-state determiner being configured to determine whether or not the pressure measuring device is frozen;
a malfunction determiner being configured to determine that the pressure measuring device has a malfunction when the usability
determiner determines that the pressure measuring device is unusable and the frozen-state determiner determines that the pressure
measuring device is not frozen; and

a model-deposition-amount calculator being configured to calculate a theoretical amount of deposition of particulate matters
in the filter device as a model-deposition-amount when the usability determiner determines that the pressure measuring device
is not usable and the frozen-state determiner determines that the pressure measuring device is frozen.

US Pat. No. 9,107,286

ELECTRICAL STORAGE DEVICE AND CONSTRUCTION MACHINE PROVIDED WITH SAME

Komatsu Ltd., Minato-ku,...

1. An electric storage device comprising:
a plurality of electric-power storage cells;
a casing that houses the electric-power storage cells; and
a condition display unit provided inside the casing,
wherein the casing comprises an inspection window through which the condition display unit is visually checkable, and
wherein the inspection window comprises:
a through hole that penetrates the casing,
a plate having a transmission property that closes the through hole from an inside of the casing,
a seal member that is interposed between the plate and an inner surface of the casing, the seal member being disposed outside
of and surrounding the through hole, and

a bolt that is screwed into the through hole from an outside of the casing, the bolt having a transmission property to thereby
allow visual check of the condition display unit through the bolt.

US Pat. No. 9,292,981

CONSTRUCTION MACHINE CONTROLLER

Komatsu Ltd., Tokyo (JP)...

1. A construction machine controller comprising:
a first board operated that activation thereof is completed within a short time, the first board performing first control
processing that is peculiar to a construction machine by a construction machine embedded operating system; and

a second board connected to the first board through a general purpose interface and activated later than the first board,
the second board being operated by a general purpose PC operating system and performing second control processing that is
different from the first control processing,

wherein the first board includes a monitoring unit monitoring an operating state of the second board, and
when the monitoring unit determines that the operating state of the second board is abnormal, the first board reactivates
or stops the second board.

US Pat. No. 9,249,710

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
an engine;
an injector injecting a reducing agent to an exhaust gas exhausted from said engine;
a display;
a determination portion determining whether a temperature of said injector is high;
a stop determination portion determining whether said engine has stopped when said injector is determined to be in a high-temperature
state as a result of determination by said determination portion;

a counter counting the number of times of stop of said engine when said injector is determined to be in the high-temperature
state based on a result of determination by said stop determination portion; and

a warning portion giving a warning on the display in connection with stop of said engine when a count value of said counter
exceeds a first prescribed value.

US Pat. No. 9,249,664

BENT AXIS TYPE AXIAL PISTON MOTOR

Komatsu Ltd., Tokyo (JP)...

1. A bent axis type axial piston motor comprising:
a drive shaft supported by a casing through a taper roller bearing disposed between the drive shaft and the casing, the drive
shaft being supported in a manner such that an end part of the drive shaft is disposed in the casing and the drive shaft is
rotatable on an axis thereof;

a cylinder block slidably connected to the end part of the drive shaft through a center shaft and a plurality of piston rods
disposed around the center shaft, the cylinder block being disposed in the casing in a manner such that the cylinder block
is rotatable around an axis of the center shaft;

an accommodation space formed in the casing at a position close to a roller accommodation part of the taper roller bearing
and surrounding the end part of the drive shaft;

a plurality of first braking elements having an annular flat plate shape and disposed in the accommodation space in a manner
such that the first braking elements are movable along the axis of the drive shaft but are restrained from rotating relative
to the casing;

a plurality of second braking elements having an annular flat plate shape and disposed in the accommodation space in a manner
such that the second braking elements are movable along the axis of the drive shaft but are restrained from rotating relative
to the drive shaft, the second braking elements and the first braking elements being alternately arranged in the accommodation
space;

a brake force receiving member having an annular shape and disposed in the accommodation space at a position facing the roller
accommodation part of the taper roller bearing; and

a braking member movably disposed at a position facing the brake force receiving member with the alternately arranged first
and second braking elements disposed between the braking member and the brake force receiving member, so as to cause frictional
forces between the first and second braking elements by pushing the first and second braking elements against the brake force
receiving member,

wherein when the drive shaft is rotated using the cylinder block by causing the piston rods to reciprocate, a pressing force
applied by the braking member is removed to allow relative rotation between the first and second braking elements, and when
the first and second braking elements are pushed against the brake force receiving member by the braking member, relative
rotation between the first and second braking elements is restrained so as to brake the drive shaft,

wherein a restriction member is disposed between the casing and the brake force receiving member to restrain the brake force
receiving member from being moved relative to the casing along the axis of the drive shaft by a flow of oil from the taper
roller bearing,

wherein the restriction member has a plate shape and is attached to an end surface of the brake force receiving member in
a state where an outer circumferential part of the restriction member protrudes from an outer circumferential part of the
brake force receiving member, and

an internal engagement groove is formed in the casing to receive an end part of the restriction member protruding from the
outer circumferential part of the brake force receiving member.

US Pat. No. 9,046,017

REGENERATION CONTROL DEVICE AND REGENERATION CONTROL METHOD OF DIESEL PARTICULATE FILTER

Komatsu Ltd., Tokyo (JP)...

1. A regeneration control device of a diesel particulate filter, comprising:
a regeneration control unit configured to combust particulate matter accumulated in a diesel particulate filter that removes
the particulate matter from exhaust gas of an engine and regenerate the diesel particulate filter when an accumulation amount
of the particulate matter accumulated in the diesel particulate filter exceeds a predetermined value,

wherein the regeneration control unit is configured to perform lower limit control in which a lower limit of an engine speed
is set to a value greater than or equal to a predetermined threshold value during the regeneration, the regeneration control
unit is configured to continue to perform the lower limit control for a predetermined time after the regeneration is ended,
the regeneration control unit is configured to end the lower limit control after the predetermined time is passed and then
perform an engine speed control.

US Pat. No. 9,243,923

MINING MACHINE MANAGEMENT SYSTEM AND MINING MACHINE MANAGEMENT METHOD

Komatsu Ltd., Tokyo (JP)...

1. A mining machine management system comprising:
a position information detection unit which is mounted in a mining machine operating in a mine and detects position information
related to a position of the mining machine; and

a determination unit which determines that a second route corresponding to a plurality of pieces of the position information
is identical to a first route based on at least whether or not a position of each node present at every predetermined distance
of the first route corresponds with the position information detected by the position information detection unit when the
mining machine is in operation, the node being a piece of information related to a position of the first route that is a route
taken by the mining machine departing a predetermined first position, passing a second position at which a load is loaded,
and moving to a third position at which the load is removed, wherein

the determination unit determines that the position of the node corresponds with the position information when the position
information is located in a predetermined range around the node, and corrects the position of the node by using the position
information located within the predetermined range.

US Pat. No. 9,129,735

TRANSFORMER AND METHOD FOR MANUFACTURING CASE OF THE TRANSFORMER

Komatsu Ltd., Minato-ku,...

1. A transformer comprising:
a transformer body comprising:
a primary coil configured to receive power input,
a secondary coil configured to output power, and
a core around which the primary and secondary coils are coiled;
a casting case that houses the transformer body, the case being casted using a mold core; and
a mold resin filling a clearance between the case and the transformer body, wherein the case comprises:
an attachment face portion on which the transformer body is attached,
a side wall surrounding the attachment face portion, and
an opening provided at a position opposed to the attachment face portion through which the transformer body is received into
the case and the mold resin is supplied,

wherein the mold core has a draft and includes side surfaces that extend along a vertical direction of the mold core, the
side surfaces of the mold core defining an inner wall forming section for forming an inner wall surface of the side wall,
the inner wall forming section being free of a draft that is inclined relative to a direction of a long side of the mold core
and free of a draft that is inclined relative to the vertical direction of the mold core, the inner wall surface of the side
wall being transcribed with any corresponding draft of the mold core,

wherein a thickness of a mold layer provided in the clearance between the inner wall surface of the side wall and an opposed
surface of the transformer body closely opposed to the inner wall surface is constant for a predetermined length from a point
at or near the opening of the case toward the attachment face portion, and

wherein a casting surface on an inner surface of the attachment face portion includes a core mount surface that is cut to
have a predetermined surface roughness, the core mount surface being configured to be in contact with the core.

US Pat. No. 9,294,736

WORKING VEHICLE PERIPHERY MONITORING SYSTEM AND WORKING VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A working vehicle periphery monitoring system that monitors a periphery of a working vehicle including a vehicle body frame
which supports front wheels and rear wheels and a vessel which protrudes toward a rear side of the vehicle body frame than
the rear wheels to load freight thereon, the working vehicle periphery monitoring system comprising:
a plurality of image capturing devices each of which is attached to the working vehicle and captures the periphery of the
working vehicle to output a piece of image information;

a bird's eye image synthesizing unit that acquires a plurality of pieces of the image information and synthesizes the acquired
image information to generate bird's eye image information for displaying a bird's eye image of the working vehicle and the
periphery of the working vehicle on a display device; and

a display control unit that switches between a first image and a second image wherein
a first image is obtained by superimposing
a first vessel image including at least the vessel other than a part of the vessel at the rear side of the working vehicle,
and the first vessel image also includes the front wheels and rear wheels displayed with the vessel on an area in which the
working vehicle is present in the bird's eye image and by displaying a lower area of the vessel rear portion, near a rear
end of the vessel, on the bird's eye image corresponding to the part of the vessel and

a second image is obtained by superimposing
a second vessel image including at least all of the vessel and the front wheels and rear wheels displayed with the vessel
on the area in which the working vehicle is present in the bird's eye image to be displayed on the display device.

US Pat. No. 9,284,720

GUIDANCE OUTPUT DEVICE AND GUIDANCE OUTPUT METHOD

KOMATSU LTD., Tokyo (JP)...

1. A guidance output method that outputs guidance for energy saving for a construction machine on which a guidance output
device is mounted, the guidance output device receives outputs from a control system of the construction machine, comprising:
a guidance storage step of storing, by a guidance storage unit of the guidance output device, guidances for energy saving
corresponding to a plurality of categories of energy wasting operations with priorities of said guidances;

a detection step of, during the operation of said construction machine on which said guidance output device is mounted, detecting
by the guidance output device the occurrence of energy wasting operation;

a determining step of, by the guidance output device, determining whether the energy wasting operation has continued for at
least a predetermined time interval;

an output control step of, by the guidance output device, along with outputting corresponding guidance for energy saving when
said energy wasting operation has been detected, also outputting said corresponding guidance for energy saving at a predetermined
timing after the occurrence of said energy wasting operation, when it is determined that the energy wasting operation continues
for at least the predetermined time interval, and wait to output said corresponding guidance until after the energy wasting
operation continues for at least the predetermined time interval; and

a priority guidance step that determines, by the guidance output device, whether two or more categories of said energy wasting
operations are detected; and

when the priority guidance determination unit determines that two or more categories of said energy wasting operations are
detected:

determine which two or more guidance for energy saving, from among the guidances for energy saving which are stored in said
guidance storage unit, correspond to the two or more categories of said energy wasting operations which are detected; and

determine which among the two or more guidance for energy saving, which are determined to correspond to the two or more categories
of said energy wasting operations that are detected, has a most priority so as to be preferentially outputted among the two
or more guidances when the two or more categories of said energy wasting operations have a same number of occurrences, wherein
a guidance for energy saving for a category of energy wasting operation that has occurred the most times is outputted as a
priority when the two or more categories of said energy wasting operations have a different number of occurrences;

wherein said output control step outputs, by the guidance output device, said guidance for energy saving that has been determined
to be outputted as the priority, at said predetermined timing.

US Pat. No. 9,322,147

INFORMATION DISPLAY DEVICE OF CONSTRUCTION MACHINE, INFORMATION DISPLAY METHOD OF CONSTRUCTION MACHINE, AND INFORMATION DISPLAY COMPUTER PROGRAM OF CONSTRUCTION MACHINE

Komatsu Ltd., Tokyo (JP)...

1. An information display device of a construction machine, comprising:
a display device that is mounted in a construction machine and displays various types of information of the construction machine;
a display change-over switch for changing information displayed on the display device; and
a control device that displays at least information of a fuel amount and information of an engine water temperature in a screen
of the display device and displays a guide mark guiding a function of the display change-over switch at a position corresponding
to a position of the display change-over switch in the screen,

wherein the control device deletes a display of the guide mark when the construction machine is in an operation state,
wherein the control device causes information necessary when the construction machine is in the operation state to be displayed
at a position of the deleted guide mark, and

wherein the information that is necessary when the construction machine is in the operation state and that is displayed at
the position of the deleted guide mark is information that is not displayed in the display device before the display the guide
mark is deleted.

US Pat. No. 9,157,214

BULLDOZER

KOMATSU LTD., Tokyo (JP)...

1. A bulldozer comprising:
a cab;
a work implement located frontward of said cab;
an engine arranged between said cab and said work implement;
a first exhaust gas treatment unit including a first exhaust gas treatment device and a second exhaust gas treatment device;
a second exhaust gas treatment unit including a third exhaust gas treatment device and a fourth exhaust gas treatment device;
and

an exhaust pipe connected to each of said second exhaust gas treatment device and said fourth exhaust gas treatment device,
said first to fourth exhaust gas treatment devices being arranged next to each other, between said cab and said work implement,
in an order of said first exhaust gas treatment device, said second exhaust gas treatment device, said fourth exhaust gas
treatment device, and said third exhaust gas treatment device, so that a longitudinal direction of each exhaust gas treatment
device is along a vehicular width direction, as seen in a plan view, and

said exhaust pipe being located within a region made up of a region where said second exhaust gas treatment device is arranged,
a region where said fourth exhaust gas treatment device is arranged, and a region between said second exhaust gas treatment
device and said fourth exhaust gas treatment device, and located on an end side in said longitudinal direction, as seen in
a plan view.

US Pat. No. 9,133,862

WORK VEHICLE AND METHOD FOR CONTROLLING WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine;
a throttle opening degree setting unit configured to set a throttle opening degree of the engine;
a first hydraulic pump driven by the engine;
a travel hydraulic motor driven by hydraulic fluid discharged from the first hydraulic pump;
a second hydraulic pump driven by the engine;
a work implement driven by hydraulic fluid discharged from the second hydraulic pump, the work implement having a bucket and
a boom for supporting the bucket;

a first control unit configured to set an upper limit for the throttle opening degree in accordance with a determination result
as to whether or not the work vehicle is performing excavation work; and

a second control unit configured to control output of the engine based on the smaller of the throttle opening degree set by
the throttle opening degree setting unit and the throttle opening degree set by the first control unit,

wherein
the first control unit is configured to set the upper limit of the throttle opening degree based on throttle upper limit information
for specifying the upper limit of the throttle opening degree with respect to vehicle speed,

the throttle upper limit information includes first throttle upper limit information, second throttle upper limit information
for specifying a lower upper limit of the throttle opening degree with respect to the vehicle speed than the first throttle
upper limit information, and third throttle upper limit information for specifying a lower upper limit of the throttle opening
degree with respect to the vehicle speed than the second throttle upper limit information,

the first control unit is configured to set the upper limit of the throttle opening degree based on the third throttle upper
limit information when the determination result indicates that the work vehicle is performing excavation work and when the
work implement is not in use,

the first control unit is configured to set the upper limit of the throttle opening degree based on the second throttle upper
limit information when the determination result indicates that the work vehicle is performing excavation work and when the
work implement is in use, and

the first control unit is configured set the upper limit of the throttle opening degree based on the first throttle upper
limit information when an angle in a longitudinal direction of the boom, defined so that a value of the angle increases upward,
is equal to or greater than a predetermined angle, even when the determination result indicates that the work vehicle is performing
excavation work.

US Pat. No. 9,353,502

WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A wheel loader comprising:
a cab with a driver's seat provided therein;
steps provided beside the cab to ascend to and descend from the cab;
an engine disposed to rearward of the cab in a front-back direction of the wheel loader;
a vehicle body cover covering the engine; and
an air cleaner having a filter therein, the filter being exchangeable by being pulled out from and inserted into a front end
portion of the air cleaner along a horizontal direction when the wheel loader is disposed on a level surface, and the air
cleaner being connected to the engine via an intake pipe,

the air cleaner being disposed outside the vehicle body cover and arranged such that at least a portion of the air cleaner
is positioned rearward of the cab and at least a portion of the air cleaner is positioned farther outward in a lateral direction
of the wheel loader than the cab, the air cleaner being arranged to extend in a diagonal orientation in a top plan view of
the wheel loader such that the front end portion of the air cleaner is disposed farther outward in the lateral direction of
the wheel loader than a rear end portion of the air cleaner.

US Pat. No. 9,291,709

DUMP TRUCK

KOMATSU LTD., Tokyo (JP)...

1. A dump truck comprising:
a body including an upper deck where a driver's seat is disposed and a main frame disposed in a longitudinal direction of
the dump truck; and

a plurality of cameras each configured to capture an image in a three dimensional capture range, the cameras being arranged
to obtain images to be combined to generate a bird's-eye image to monitor a periphery of the dump truck, the cameras including

a front camera disposed at the front of the upper deck to obtain an image of an area in front of the body,
a rear camera disposed at a rear end of the main frame to obtain an image of an area in rear of the body, and
a plurality of side cameras respectively provided on left and right sides of the upper deck to obtain images of an area between
diagonally to the front and diagonally to the rear of the body

the front camera, the rear camera, and the side cameras are arranged on the body such that the capture ranges of adjacent
cameras among the front, rear, and side cameras overlap, and such that for any one camera among the front, rear, and side
cameras whose capture range has a height dimension smaller than one-half a height of the upper deck at a prescribed portion
of the periphery, there is another camera among the front, rear, and side cameras that is adjacent to the one camera and whose
capture range has a height dimension of at least one-half the height of the upper deck at the prescribed portion of the periphery.

US Pat. No. 9,457,719

WORK VEHICLE PERIPHERY MONITORING SYSTEM AND WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle periphery monitoring system which monitors a periphery of a work vehicle, comprising:
an imaging apparatus which is attached to the work vehicle and images a periphery of the work vehicle to output image information;
a display control unit which displays an image based on the image information which is output by the imaging apparatus, and
a plurality of patterns indicating information relating to the work vehicle periphery monitoring system on a display unit;
and

a pattern display control unit which, when a display of the display unit is switched, changes or maintains display positions
of the patterns which are displayed on the display unit after the display of the display unit is switched,

wherein
the display control unit
switches between a first image including a bird's eye image and images including the patterns, and a second image based on
the image information imaged by the imaging apparatus to be displayed on the display unit, and

displays at least one of the images including at least one of the patterns included in the first image and the images including
the-patterns at positions overlapping the second image, and

when the display of the display unit is switched to the second image, the pattern display control unit changes a display position
of at least one of the images including the patterns at the positions overlapping the second image to a position not overlapping
the second image, and maintains a display position of another of the images including the patterns at the positions overlapping
the second image.

US Pat. No. 9,290,907

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine;
an engine compartment for housing the engine;
a cooling chamber;
a heat exchanger arranged inside the cooling chamber;
a cooling fan arranged inside the cooling chamber and configured to discharge air toward a direction that is isolated from
the engine compartment;

a dividing wall for separating the engine compartment and the cooling chamber, the dividing wall including a passage opening
linking the engine compartment and the cooling chamber; and

a cover including a main cover section and a connecting section, the main cover section being arranged inside the cooling
chamber next to the dividing wall with a gap therebetween, the main cover section being arranged to face the passage opening,
the connecting section connecting section including an open region for coupling the main cover section and the dividing wall,

the open region including a first opening which opens upward and a second opening which opens downward.

US Pat. No. 9,353,503

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine compartment;
a cooling compartment;
a radiator contained in the cooling compartment;
a partition wall that partitions the engine compartment from the cooling compartment;
a cooling fan contained in the cooling compartment for exhausting air from the cooling compartment;
a first duct body part that has a first end part positioned inside the engine compartment and a second end part positioned
inside the cooling compartment between the radiator and the partition wall; and

a vehicle body cover for defining the cooling compartment and having an outdoor air intake port formed in front of the radiator
and the cooling fan.

US Pat. No. 9,156,341

ELECTRIC WORK VEHICLE AND BATTERY HOLDING STRUCTURE THEREOF

KOMATSU LTD., Tokyo (JP)...

1. A battery holding structure for an electric work vehicle equipped with a battery-driven electric motor, the battery holding
structure comprising:
a base frame including a base plate, a plurality of vertical partition plates, and a plurality of mount parts, the vertical
partition plates being arranged erectly on the base plate to extend in a longitudinal direction, the vertical partition plates
being spaced laterally inward from side portions of the base plate, the mount parts being disposed on a rear end portion of
the base frame in positions corresponding to the vertical partition plates such that at least a portion of the base frame
extends laterally to the outside beyond each of two laterally outermost mount parts among the plurality of the mount parts;

a plurality of battery cases respectively having a bottom wall and front, rear, right and left sidewalls, each of the battery
cases respectively accommodating a plurality of batteries aligned in a lateral direction, the plurality of battery cases being
arranged on the rear end portion of the base frame and stacked in a vertical direction with the lateral widths of the battery
cases being aligned with a lateral width of the base frame;

a plurality of pillars to which the rear sidewalls of respective ones of the stacked battery cases are fixed, the plurality
of pillars being respectively fixed at bottom end portions thereof to the mount parts of the base frame and extending upwardly.

US Pat. No. 9,689,140

CONSTRUCTION MACHINE CONTROL SYSTEM, CONSTRUCTION MACHINE, AND CONSTRUCTION MACHINE CONTROL METHOD

Komatsu Ltd., Tokyo (JP)...

1. A construction machine control system for a construction machine that includes a work machine including a boom, an arm,
and a bucket and an operating device receiving an input of an operator's operation command for driving the work machine, the
construction machine control system comprising:
a hydraulic cylinder that drives the work machine;
a direction control valve that has a movable spool and that supplies operating oil to the hydraulic cylinder with movement
of the spool to operate the hydraulic cylinder;

a control valve that allows the spool to be movable based on the operation command;
a storage unit that stores a plurality of pieces of correlation data indicating a relation between a cylinder speed of the
hydraulic cylinder and an operation command value indicating a value of an operation command signal for operating the hydraulic
cylinder according to a type of the bucket;

an acquiring unit that acquires type data indicating the type of the bucket; and
a control unit that selects one piece of correlation data from the plurality of pieces of correlation data based on the type
data and controls the operation command value based on the selected correlation data.

US Pat. No. 9,279,353

ENGINE UNIT AND WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. An engine unit, comprising:
an engine;
a first exhaust gas treatment unit arranged above said engine and including a first exhaust gas treatment device and a second
exhaust gas treatment device;

a second exhaust gas treatment unit arranged above said engine and including a third exhaust gas treatment device and a fourth
exhaust gas treatment device;

a first connection pipe having an expandable first bellows part and guiding exhaust gas from said engine to said first exhaust
gas treatment device of said first exhaust gas treatment unit;

a second connection pipe having an expandable second bellows part and guiding the exhaust gas from said engine to said third
exhaust gas treatment device of said second exhaust gas treatment unit; and

a branch pipe dividing the exhaust gas from said engine, said first connection pipe connecting said branch pipe to said first
exhaust gas treatment device and said second connection pipe connecting said branch pipe to said third exhaust gas treatment
device, wherein

said first to fourth exhaust gas treatment devices are arranged to be located in an order of said first exhaust gas treatment
device, said second exhaust gas treatment device, said fourth exhaust gas treatment device, and said third exhaust gas treatment
device, such that respective longitudinal directions thereof extend next to each other,

said first connection pipe is routed through at least a partial region of a region directly underneath said second exhaust
gas treatment device and a region directly underneath said fourth exhaust gas treatment device,

said second connection pipe is routed through at least a partial region of the region directly underneath said second exhaust
gas treatment device and the region directly underneath said fourth exhaust gas treatment device, and

said branch pipe is disposed in at least a portion of regions directly underneath said second exhaust gas treatment device
and said fourth exhaust gas treatment device.

US Pat. No. 9,238,903

CONTROL METHOD AND CONTROL APPARATUS FOR WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A control method for a work vehicle that is applicable to a work vehicle of a structure in which a movement of a bucket
is restricted by abutment of a work equipment constituted by the bucket against a stopper, whereby the bucket in a dump position
is forcibly moved upward toward a tilt direction and a bucket hydraulic cylinder is pressurized by a lifting operation of
a boom, wherein
control is performed to supply a pressure oil to the bucket hydraulic cylinder so as to actuate the bucket hydraulic cylinder
in the tilt direction when the work equipment is being actuated in an actuation region in which the bucket is forcibly actuated
in the tilt direction, or in the actuation region close thereto, when lifting the boom in a state in which the bucket is operated
at a position corresponding to a stopped position or to a bucket operation direction corresponding to a dumping operation
position.

US Pat. No. 9,169,619

WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A wheel loader, comprising:
a cab having a driver seat provided therein;
a ladder useable to ascend to and descend from the cab, the ladder being provided to a first side of the cab in a vehicle
width direction of the wheel loader, the ladder having at least three steps disposed with intervals therebetween in a vertical
direction;

a vehicle body cover disposed to a rear of the cab and defining an engine room;
an engine disposed inside the engine room;
an air cleaner having a filter therein, the filter being exchangeable and being configured to clean air supplied to the engine;
and

a platform disposed to the first side of the cab,
the air cleaner being disposed outside of the vehicle body cover and above and to the rear of the ladder,
the ladder extending downward from the platform, the ladder having
a first step positioned at a top of the ladder that projects outward by a projection amount in the vehicle width direction
with respect to the platform, and

steps below the first step, each of the steps below the first step projecting outward by a projection amount in the vehicle
width direction with respect to one step above,

the projection amount in the vehicle width direction of at least one of the first step and a second step positioned second
from the top of the ladder is larger than the projection amount in the vehicle width direction of the step below the second
step.

US Pat. No. 9,120,658

FORKLIFT AND CONTROL METHOD OF FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. A forklift comprising:
a variable displacement traveling hydraulic pump driven by an engine;
a hydraulic motor that forms a closed circuit with the traveling hydraulic pump therebetween and is driven by hydraulic oil
discharged from the traveling hydraulic pump;

driving wheels driven by the hydraulic motor;
an accelerator operation unit that increases and decreases an amount of fuel supplied to the engine;
a target absorption torque calculation unit that calculates a target absorption torque of the traveling hydraulic pump or
a target swash plate tilting angle of a swash plate included in the traveling hydraulic pump, based on an actual engine speed
of the engine;

an inching operation unit that operates an inching rate indicating a reduction ratio to a predetermined swash plate tilting
angle of the traveling hydraulic pump;

an inching rate calculation unit that calculates the inching rate corresponding to an operation amount of the inching operation
unit, and sets a lower limit of the inching rate to a value greater than 0, only in a state in which both of the accelerator
operation unit and the inching operation unit are operated; and

an output control unit that outputs a corrected absorption torque command corresponding to a corrected absorption torque obtained
by reducing the target absorption torque based on the inching rate or a corrected swash plate tilting angle command corresponding
to a corrected swash plate tilting angle obtained by reducing the target swash plate tilting angle based on the inching rate
to the traveling hydraulic pump.

US Pat. No. 9,284,716

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
a cab having a box section and a floor section, the box section having a lower face that is open, the box section being detachably
attached to the floor section such that the floor section closes the lower face of the box section;

a first controller that controls equipment required for travel;
a base member to which the first controller is attached, the base member being attached in a detachable manner to a rear wall
of the box section inside the cab;

a second controller attached to the rear wall of the box section;
an attachment member that is detachably attachable to the floor section, the attachment member being configured to be attached
to an attachment part of the base member such that the base member can be detached from the rear wall and attached to the
attachment member with the first controller remaining attached to the base member.

US Pat. No. 9,273,615

CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE, WORK MACHINE AND CONTROL METHOD OF INTERNAL COMBUSTION ENGINE

Komatsu Ltd., Tokyo (JP)...

1. A control device of an internal combustion engine, wherein when the control device controls the internal combustion engine
that is provided in a work machine and that serves as a power source for the work machine, a driving state of the work machine
is detected, and based on the detected driving state,
the control device controls driving state of the internal combustion engine by using:
a first relationship of a torque and a rotation speed of the internal combustion engine which is defined to correspond to
a case where an amount of fuel injection for the internal combustion engine is maximum at each rotation speed of the internal
combustion engine and so that an output at a rotation speed to generate a rated output of the internal combustion engine is
equal to or more than the rated output;

a second relationship of the torque and the rotation speed of the internal combustion engine which is defined to correspond
to a case where the amount of fuel injection for the internal combustion engine is zero at each rotation speed of the internal
combustion engine and so that the torque of the internal combustion engine decreases in accordance with increase of the rotation
speed of the internal combustion engine, where a point where the torque and the rotation speed of the internal combustion
engine are zero is defined as a start point; and

a third relationship which is a relationship of the torque and the rotation speed of the internal combustion engine, which
is obtained from the first relationship and the second relationship.

US Pat. No. 9,255,379

MOTOR GRADER

KOMATSU LTD., Tokyo (JP)...

1. A motor grader comprising:
a box-shaped frame;
a work implement configured to be supported by the frame, and
a first bead part,
the frame including a bracket, a first frame part and a second frame part, the bracket having left and right side surfaces
with which a lifter guide is formed in an integrated manner, the lifter guide being configured to support a lift cylinder
that moves the work implement,

a lifter bracket configured to encircle the lifter guide, and
a cylinder configured to be coupled to the lifter bracket and the work implement,
the first frame part being configured to extend forward from a front end part of the bracket and support the work implement,
the second frame part being configured to extend rearward from a rear end part of the bracket,
the first frame part being directly connected to the front end part of the bracket,
the second frame part being directly connected to the rear end part of the bracket,
the first bead part being configured to connect the bracket and the first frame part, and including a first portion, a second
portion and a third portion, the first portion being configured to extend in a crosswise direction and connect a top surface
of the bracket and a top surface of the first frame part, the second portion being configured to extend in the crosswise direction
and connect a bottom surface of the bracket and a bottom surface of the first frame part, the third portion being configured
to extend in a vertical direction and connect one of the left and right side surfaces of the bracket and a side surface of
the first frame part, the third portion being substantially perpendicular to the first and second portions, and the first
portion and the second portion being offset from each other in a first direction perpendicular to a second direction in which
the third portion extends.

US Pat. No. 9,228,320

COOLING DEVICE AND CONSTRUCTION MACHINE OR WORKING MACHINE EQUIPPED WITH THE SAME

Komatsu Ltd., Minato-ku,...

1. A cooling device, comprising:
a cooling fan;
a shroud provided at an outer circumferential side of the cooling fan;
an inner circumferential wall provided on the shroud and spaced apart from an outer circumference of the cooling fan in a
radial direction of the cooling fan by a predetermined distance to surround the cooling fan; and

an outer circumferential wall provided to surround the inner circumferential wall, an air-flow-direction downstream side end
of the outer circumferential wall being positioned at a further downstream position in an air flow direction than an air-flow-direction
downstream side end of the inner circumferential wall, at least a portion of the outer circumferential wall including a cylindrical
surface,

wherein the cooling fan is rotatably disposed in a space radially inside the inner circumferential wall,
wherein an air-flow-direction downstream side end of an outer circumferential edge of the cooling fan is positioned at a further
downstream position in the air flow direction than the air-flow-direction downstream side end of the inner circumferential
wall,

wherein the air-flow-direction downstream side end of the outer circumferential wall is positioned at a further upstream position
in the air flow direction than the air-flow-direction downstream side end of the outer circumferential edge of the cooling
fan, and

wherein an angle between: (i) a line connecting the air-flow-direction downstream side end of the inner circumferential wall
to the air-flow-direction downstream side end of the outer circumferential wall in a cross section along the air flow direction
of the inner circumferential wall and the outer circumferential wall, and (ii) a line orthogonal to the air flow direction,
is 9 degrees or more and 45 degrees or less.

US Pat. No. 9,126,643

CAB FOR WORK VEHICLE AND WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A cab for work vehicle, comprising:
a floor frame; and
a plurality of pillars erected on said floor frame,
at least one pillar of said plurality of pillars having a pipe structure having a first hollow space,
in said at least one pillar, a first opening for exhausting said first hollow space to an outdoor space outside an indoor
space surrounded by said plurality of pillars and a second opening for exhausting said indoor space to said first hollow space
being formed, and

said first opening and said second opening being arranged at a prescribed distance from each other in a longitudinal direction
of said pillar, said cab for work vehicle further comprising

a cab structure member other than said plurality of pillars having a second hollow space partitioned off said indoor space
and a third opening for connecting said second hollow space to said indoor space, said second hollow space being constructed
to be exhausted to said outdoor space through said first opening,

wherein the second opening is an upper end opening of the at least one pillar and the first opening is a lower end opening
of the at least one pillar.

US Pat. No. 9,121,697

WEAR AMOUNT MEASURING DEVICE, WEAR AMOUNT MEASURING METHOD, WEAR AMOUNT MEASURING PROGRAM AND STORAGE MEDIUM

KOMATSU LTD., Tokyo (JP)...

1. A wear amount measuring device comprising:
a computer including a
storage device having a wear amount measuring program stored therein, and
a processor configured to execute the wear amount measuring program; and
an image display device operatively coupled to the computer and configured to display an image based on a display signal received
from the computer,

the wear amount measuring program being configured to cause the image display device to
display a real object image of a replaceable component based on real object image data containing a real wear amount measurement
target and a real reference part of the replaceable component, the real reference part functioning as a measurement-related
positioning reference for the real wear amount measurement target, and

display a plan image based on design plan data corresponding to the replaceable component in an unused state, the design plan
data containing a plan wear amount measurement target and a plan reference part, the plan wear amount measurement target and
the plan reference part corresponding to the real wear amount measurement target and the real reference part, respectively,

the wear amount measuring program including
an image processing section configured to execute an image processing of overlapping the real object image and the plan image
at an equal scale on a corresponding positional relation when the real reference part in the real object image and the plan
reference part in the plan image are matched, and

a wear amount computing section configured to compute a wear amount based on a magnitude of an interval between a measurement
contour line drawn along an outer peripheral contour of the real wear amount measurement target in the real object image and
a plan outer peripheral contour line in the plan image.

US Pat. No. 9,091,342

CONTROL DEVICE FOR HYDROSTATIC TRANSMISSION VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A control device for a hydrostatic transmission vehicle equipped with a hydrostatic transmission including a variable displacement
pump to be driven by an engine and a variable displacement hydraulic motor to be rotated by a pressurized oil from the variable
displacement pump, the control device comprising:
a vehicle speed setting section configured to set a set vehicle speed based on both a forward/rearward travel command and
a gear stage command instructed by an operator;

a hydraulic sensor configured and arranged to detect a pressure in a hydraulic circuit including the variable displacement
pump and the variable displacement hydraulic motor;

a torque limit setting section configured to obtain an engine speed and set a torque limit usable for the hydrostatic transmission
based on the obtained engine speed;

a vehicle speed limit setting section configured to set a vehicle speed limit based on the detected pressure in the hydraulic
circuit and the torque limit set by the torque limit setting section;

a vehicle speed selection section configured to select a lower one of the set vehicle speed set by the vehicle speed setting
section and the vehicle speed limit set by the vehicle speed limit setting section; and

a pump and motor displacement control section configured to control respective displacements of the variable displacement
pump and the variable displacement hydraulic motor based on the vehicle speed selected by the vehicle speed selection section.

US Pat. No. 9,079,613

CRAWLER WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A crawler work vehicle comprising:
an engine;
left and right travel devices that respectively have a crawler and a drive wheel for driving the crawler;
a power transmission device that transmits power from the engine to the drive wheels of the left and right travel devices;
left and right steering clutches that are disposed between the power transmission device and the left and right drive wheels
and transmit or block power;

left and right steering brakes that are respectively disposed between the left and right steering clutches and the left and
right drive wheels, and that brake rotation of the left and right drive wheels;

a rotation speed detecting device that detects an output rotation speed of the steering brakes;
a brake hydraulic pressure obtaining device that obtains a brake hydraulic pressure supplied to the steering brakes; and
a brake protecting means that refers to the output rotation speed and the brake hydraulic pressure to compute a heat rate
of the steering brakes, and that executes a protection process of the steering brakes by reducing the engine output upon determining
the heat rate that was computed is equal to or greater than a preset first threshold.

US Pat. No. 9,228,319

COOLING DEVICE AND CONSTRUCTION MACHINE OR WORKING MACHINE EQUIPPED WITH THE SAME

Komatsu Ltd., Minato-ku,...

1. A cooling device, comprising:
a cooling fan;
a shroud provided at an outer circumferential side of the cooling fan;
an inner circumferential wall that is fixed on the shroud and is provided at the outer circumferential side of the cooling
fan to surround the cooling fan and to be spaced apart from the outer circumference of the cooling fan in a radial direction
of the cooling fan by a predetermined distance, the inner circumferential wall being outside of and facing the cooling fan
in the radial direction of the cooling fan; and

an outer circumferential wall that is provided to surround the inner circumferential wall, the outer circumferential wall
being outside of and facing the inner circumferential wall in the radial direction of the cooling fan, and the outer circumferential
wall comprising an air-flow-direction downstream side end positioned at a further downstream position in an air flow direction
than an air-flow-direction downstream side end of the inner circumferential wall, at least a portion of the outer circumferential
wall including a cylindrical surface,

wherein the cooling fan is rotatably provided in a space radially inside the inner circumferential wall,
wherein an air-flow-direction downstream side end of an outer circumferential edge of the cooling fan is positioned at a further
downstream position in the air flow direction than the air-flow-direction downstream side end of the inner circumferential
wall,

wherein the air-flow direction downstream side end of the outer circumferential wall is positioned at a further upstream position
in the air flow direction than the air-flow direction downstream side end of the cooling fan,

wherein a ratio between an air-flow-direction length of the outer circumferential wall and an air-flow-direction length of
the inner circumferential wall is 1.07 or more and 1.81 or less, and

wherein a width between the outer circumferential wall and the inner circumferential wall is 15 mm or more and 55 mm or less.

US Pat. No. 9,074,342

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
a main body frame;
a counterweight positioned at a rear portion of the main body frame, the counterweight forming a concave portion that is recessed
rearwardly from a front surface side of the counterweight and extends to a top surface of the counterweight;

a first beam member extending across the concave portion between a right side end and a left side end of the counterweight,
the first beam member being fixed to the right side end and the left side end of the counterweight with fasteners;

a first cover member provided on a top surface of a first frame portion including the first beam member and the concave portion,
the top surface of the first frame portion being defined by a top surface of the first beam member and the top surface of
the counterweight, the first cover member spanning between the top surface of the first beam member and the top surface of
the counterweight so as to cover a space surrounded by the concave portion:

a second frame portion positioned at a front side of the concave portion and attached to the main body frame, and
a second cover member supported by the second frame portion and covering a portion in front of a space surrounded by the concave
portion,

the first frame portion and the second frame portion being provided independently of each other.

US Pat. No. 9,272,742

CRAWLER BELT LINK AND CRAWLER BELT APPARATUS

KOMATSU LTD., Tokyo (JP)...

1. A crawler belt link including a first surface having a track shoe plate attachment portion, a second surface facing said
first surface and having a rail surface, and first and second side portions extending in a direction that intersects said
first and second surfaces and facing each other, said crawler belt link comprising:
a center portion provided with said track shoe plate attachment portion and having a first portion of said rail surface;
one end portion located on one end side of said center portion, having a second portion of said rail surface and disposed
to be shifted toward said first side portion with respect to said center portion; and

the other end portion located on the other end side of said center portion, having a third portion of said rail surface and
disposed to be shifted toward said second side portion with respect to said center portion,

said one end portion being provided with a first through hole extending through said one end portion from said first side
portion toward said second side portion, said first through hole being a bushing hole,

said other end portion being provided with a second through hole extending through said other end portion from said first
side portion toward said second side portion and having a portion smaller in diameter than said first through hole,

said one end portion including a first through hole surrounding portion surrounding said first through hole in said second
side portion, and a first outer circumferential portion extending from an outer circumference of said first through hole surrounding
portion to said second portion of said rail surface, and

said first outer circumferential portion being located closer to said second side portion with respect to said first through
hole surrounding portion where said first outer circumferential portion intersects said second portion of said rail surface.

US Pat. No. 9,257,242

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising an engine and an engine-stop switch device of said work vehicle configured to stop said engine
from operating,
said engine-stop switch device including:
a case;
an operation unit attached to said case and moving, at a front side of said case, between a first operational position of
permitting said engine to start and a second operational position of stopping said engine from operating and inhibiting said
engine from starting;

an operation unit cover moving between a position of covering said operation unit and a position of exposing said operation
unit, and holding said operation unit at said first operational position while said operation unit cover is at the position
of covering said operation unit;

a housing covering lateral sides and a top side of said case that cross said front side of said case and exposing said operation
unit cover from said front side; and

a pivoting member pivoting about a pivoting member's pivot shaft located above said operation unit cover, between a closed
position of covering said operation unit cover and an opened position of exposing said operation unit cover and, while said
pivoting member is at said closed position, said pivoting member forming a closed space, between said pivoting member and
said housing, for accommodating at least said operation unit cover in the closed space and holding said operation unit cover
at said position of covering said operation unit.

US Pat. No. 9,102,291

BULLDOZER

KOMATSU LTD., Tokyo (JP)...

1. A bulldozer comprising:
a body;
a radiator disposed in said body;
a front grille attached to a front end of said body and disposed in front of said radiator; and
a blade disposed in front of said front grille with a space interposed therebetween,
said blade having an upper end located at a position higher than a lower end of said front grille when a lower end of said
blade is in contact with a level surface,

said front grille formed of a first rotation plate having one end supported by said body so as to be rotatable relative to
a first shaft extending in an upward/downward direction of said body, said first shaft and said first rotation plate being
disposed in front of said front end of said body,

when it is assumed that a first dimension represents a length from said front end of said body to the other end of said first
rotation plate when said first rotation plate is opened by 90° relative to a width direction of said body, said first dimension
of said first rotation plate being smaller than a minimum distance among distances between said front end of said body and
a backside surface of said blade in a front/back direction of said body when said lower end of said blade is in contact with
the level surface,

said front grille further formed of a fixation plate attached to and disposed in front of said front end of said body so as
not to rotate.

US Pat. No. 9,080,317

EXCAVATION CONTROL SYSTEM AND CONSTRUCTION MACHINE

KOMATSU LTD., Tokyo (JP)...

1. An excavation control system comprising:
a working unit formed by a plurality of driven members including a bucket, the working unit being rotatably supported by a
vehicle main body;

a plurality of hydraulic cylinders configured to drive the plurality of driven members;
a prospective speed obtaining part configured to obtain a first prospective speed and a second prospective speed, the first
prospective speed depending on a first distance between the bucket and a first designed surface indicating a target shape
for an excavation object, the second prospective speed depending on a second distance between the bucket and a second designed
surface indicating the target shape for the excavation object, the second designed surface being different from the first
designed surface, the first designed surface and the second designed surface being disposed adjacent to each other;

a speed limit selecting part configured to select either of the first prospective speed or the second prospective speed as
a speed limit based on a relative relation between the first designed surface and the bucket and a relative relation between
the second designed surface and the bucket; and

a hydraulic cylinder controlling part configured to limit a relative speed of the bucket to the speed limit, the relative
speed being relative to either one designed surface of the first and second designed surfaces which is a target of the speed
limit.

US Pat. No. 9,080,318

MOTOR GRADER

KOMATSU LTD., Tokyo (JP)...

1. A motor grader comprising:
a frame including an upper plate, a lower plate, a first side plate and a second side plate, the upper plate extending in
a vehicle width direction, the lower plate being opposed to the upper plate, the first side plate extending in an up-and-down
direction and being interposed between the upper plate and the lower plate, the second side plate being opposed to the first
side plate and interposed between the upper plate and the lower plate;

a work implement disposed under the frame;
a lifter guide joined to the frame, the lifter guide completely enclosing the frame, in a joint part of the frame for joining
the lifter guide, an end-to-end width of each of the upper and lower plates in the vehicle width direction being equivalent
to an end-to-end width between an outer side surface of the first side plate and an outer side surface of the second side
plate in the vehicle width direction;

a lifter bracket enclosing the lifter guide; and
a lift cylinder attached to the lifter bracket for driving the work implement,
the lifter guide including an annular portion and a first leg portion, the annular portion enclosing an outer periphery of
the frame, the first leg portion being continuous to an inner periphery of the annular portion, the first leg portion protruding
from the annular portion in a side view, the first leg portion being welded at an outer edge to the frame, and the outer edge
of the first leg portion being directly joined to an outer side surface of the upper plate, the outer side surface of the
first side plate and the outer side surface of the lower plate.

US Pat. No. 9,429,240

VALVE DEVICE

Komatsu Ltd., Tokyo (JP)...

1. A valve device including a spool having a small-diameter portion and a large-diameter portion in parallel to an axial direction,
the spool being arranged in a spool bore formed in a valve body, the valve device being configured to switch between an open
position and a close position by moving the spool in the axial direction with respect to the valve body, the open position
allowing passage of oil through a gap between two ports in the spool bore via a notch formed in the large-diameter portion
from an outer peripheral space of the small-diameter portion, the close position blocking passage of oil through the gap between
the two ports by the large-diameter portion, wherein
the notch of the large-diameter portion includes:
a main notch portion being open to the outer peripheral space of the small-diameter portion via a rectangular opening formed
along a radial direction of the spool, and having the inner bottom face at a portion located on a center side of the spool,
the inner bottom surface being parallel to the center axis of the spool and orthogonal to the radial direction of the spool;
and

a widening notch portion having a larger dimension than the main notch portion and being open to the outer peripheral surface
of the large-diameter portion,

wherein the main notch portion includes an adjustment groove on an inner end face of the main notch portion facing the outer
peripheral space of the small-diameter portion, the adjustment groove extending along the radial direction of the spool and
being open to the outer peripheral surface of the large-diameter portion, and

wherein the valve device further comprises a detour passage passing through a central hole inside the spool from an inlet
hole formed on the inner bottom face of the notch and being open to the outer peripheral surface of the large-diameter portion
as an outlet hole, and configured to discharge oil present at the notch from the outer peripheral surface of the large-diameter
portion when the spool is arranged at the open position.

US Pat. No. 9,353,669

ERROR RELEASING DEVICE FOR WORK VEHICLE AND ERROR RELEASING METHOD FOR WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. An error releasing device for a work vehicle to release an error related to an exhaust gas treatment system when the error
related to the exhaust gas treatment system has occurred, and an engine output limiting control has been executed, comprising:
an input unit configured to input at least a one-time password;
an authentication unit including a processing algorithm common with a processing algorithm of an external device that generates
the one-time password, and configured to authenticate the input one-time password by using the processing algorithm; and

an error release processing unit configured to release the engine output limiting control by releasing the error related to
the exhaust gas treatment system when the one-time password acquired from the external device by using inquiry information
obtained through a predetermined operating procedure is input and further the one-time password is authenticated by the authentication
unit.

US Pat. No. 9,157,216

HYDRAULIC SHOVEL CALIBRATION DEVICE AND HYDRAULIC SHOVEL CALIBRATION METHOD

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic shovel calibration device for calibrating parameters in a hydraulic shovel, the hydraulic shovel including
a vehicle body,
a work implement including a boom swingably attached to the vehicle body, an arm swingably attached to the boom, and a work
tool swingably attached to the arm,

an angle detection unit configured and arranged to detect a swing angle of the boom with respect to the vehicle body, a swing
angle of the arm with respect to the boom, and a swing angle of the work tool with respect to the arm, and

a current position computation unit configured to compute a current position of a working point included in the work tool
based on a plurality of parameters that indicate dimensions and the swing angles of the boom, the arm, and the work tool,

the hydraulic shovel calibration device comprising:
an input unit configured and arranged to input working point position information indicating a position of a boom pin and
coordinates of the working point at a plurality of positions which are measured by an external measurement device; and

a calibration computation unit configured to compute calibration values of the parameters based on the working point position
information input into the input unit.

US Pat. No. 9,387,894

CRAWLER BELT COUPLING APPARATUS

KOMATSU LTD., Tokyo (JP)...

1. A crawler belt coupling apparatus for providing an endless crawler belt by coupling a belt-like crawler belt having a series
of crawler belt links, comprising:
a first crawler belt link having a first through hole and a first cutout in an inner circumferential surface of said first
through hole;

a master pin inserted in said first through hole of said first crawler belt link and having a second cutout in an outer circumferential
surface thereof;

a first recess constructed of said first and second cutouts and having an opening at an end portion of said first through
hole;

a first knock pin disposed in said first recess such that one end surface thereof faces said opening; and
a first snap ring having a C-like shape and disposed to be separated from said one end surface of said first knock pin with
a space therebetween or disposed in abutment with said one end surface,

wherein said master pin is engaged with said first through hole through intermediate fit.

US Pat. No. 9,388,730

VENTILATION STRUCTURE FOR ENGINE COMPARTMENT

KOMATSU LTD., Tokyo (JP)...

1. A ventilation structure of an engine compartment that houses an engine and is adjacent to a cooling fan that supplies cooling
air to a heat exchanger, the ventilation structure comprising:
an exterior cover with which the engine and the cooling fan are covered; and
a ventilation duct comprising an inner surface of the exterior cover,
wherein:
the cooling fan is rotated in a fan shroud with which a surrounding area of the cooling fan is covered,
the fan shroud is housed in a frame such that a periphery of the fan shroud is surrounded by the frame,
the frame comprises a pair of vertical frames extending in a vertical direction and a horizontal frame disposed between upper
ends of the vertical frames, at least one of the vertical frames comprising a first communication opening, and the horizontal
frame comprising a second communication opening,

the fan shroud comprises a third communication opening,
a first end of the ventilation duct is open in the engine compartment, and
a second end of the ventilation duct intercommunicates with the surrounding area of the cooling fan through the first, second,
and third communication openings.

US Pat. No. 9,347,763

HYDRAULIC CYLINDER STROKE OPERATION DIAGNOSIS ASSISTING DEVICE AND HYDRAULIC CYLINDER STROKE OPERATION DIAGNOSIS ASSISTING METHOD

Komatsu Ltd., Tokyo (JP)...

1. A hydraulic cylinder stroke operation diagnosis assisting device comprising:
movable portions that are sequentially supported by a vehicle body in a rotatable manner;
a hydraulic cylinder that is disposed between the vehicle body and each movable portion or between the movable portions so
as to support the movable portions in a rotatable manner;

a stroke sensor that is disposed in the hydraulic cylinder so as to measure a stroke length of the hydraulic cylinder;
a reset sensor that measures a reference reset point in which a value of the stroke length measured by the stroke sensor is
reset;

a stroke end detection unit that detects a stroke end position of the hydraulic cylinder;
a calibration unit that calibrates the measured value of the stroke length when the reference reset point and/or the stroke
end position are detected; and

a monitor that displays at least the value of the stroke length measured by the stroke sensor and a calibration state by the
calibration unit on a screen,

wherein the monitor displays a correction value of the measured value of the stroke length calculated by the calibration unit.

US Pat. No. 9,341,480

MINING MACHINE MANAGEMENT SYSTEM AND MINING MACHINE MANAGEMENT METHOD

Komatsu Ltd., Tokyo (JP)...

1. A mining machine management system comprising:
a position information detection unit which is mounted in a mining machine operating in a mine and detects position information
related to a position of the mining machine;

an information collection device which is mounted in the mining machine and collects operation information of the mining machine;
a route information generation unit which generates route information based on a plurality of pieces of the position information
obtained by the position information detection unit when the mining machine in operation travels along a route departing from
a predetermined first position, passing a second position at which a load is loaded, and moving to a third position at which
the load is removed, the route information including a plurality of nodes present at every predetermined distance of the route
and a link connecting the nodes adjacent to each other; and

a route analysis unit which determines a section having a plurality of the links adjacent to each other within the route information
to be a specific section in which a slope difference between the links adjacent to each other falls within a predetermined
value, an orientation difference between the links adjacent to each other falls within a predetermined value, and there is
no intersection between the links;

wherein the route analysis unit calculates at least one of the number of travels of the mining machine, the travel time, and
the operation information for each said specific section; and

a route determination unit which determines that the actual travel route corresponds with a registered route when a specific
section position, which is a passing position located at both ends of the specific section, corresponds to position information
on the actual travel route of the mining machine.

US Pat. No. 9,267,455

WORK VEHICLE AND WORK VEHICLE CONTROL METHOD

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine;
a travel device configured to cause the work vehicle to travel, the travel device being driven by a drive force from the engine;
a hydraulic pump configured to discharge hydraulic fluid, the hydraulic pump being driven by the drive force from the engine;
a work implement driven by the hydraulic fluid from the hydraulic pump;
a torque converter device configured to transmit the drive force from the engine to the travel device, the torque converter
device having a torque converter and a lockup clutch;

an accelerator operation member operated by an operator;
an accelerator operation detector configured to detect an operation amount of the accelerator operation member; and
a controller configured to control the engine based on one of at least a first engine torque curve and a second engine torque
curve, each of the first and second torque curves defining a relationship between an engine speed, an engine output torque,
and the operation amount of the accelerator operation member, the first engine torque curve being different from the second
engine torque curve,

the controller being further configured to
control the engine based on the first engine torque curve during torque conversion travel in which the lockup clutch is in
a non-connected state,

change to controlling the engine based on the second engine torque curve after the controller determines that the lockup clutch
has been switched from the non-connected state to a connected state, and

the engine output torque of the second engine torque curve being less than the engine output torque of the first engine torque
curve at least at a switch speed at which a switch is made from the non-connected state to the connected state of the lockup
clutch when the operation amount of the accelerator operation member is a predetermined operation amount that is less than
a maximum operation amount.

US Pat. No. 9,109,344

WORKING MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A working machine comprising:
an actuator;
a hydraulic pump configured to discharge a hydraulic fluid;
a pump flow path connected to the hydraulic pump;
a tank configured to contain the hydraulic fluid;
a tank flow path connected to the tank;
an operating member;
a first pilot pressure control unit including a first pump port connected to the pump flow path, a first tank port connected
to the tank flow path, and a first supply/discharge port, the first pilot pressure control unit being configured to be switched
between an output state and a discharge state in accordance with an operation of the operating member, the first pilot pressure
control unit in the output state causing the hydraulic fluid to flow between the first pump port and the first supply/discharge
port for outputting from the first supply/discharge port the hydraulic fluid of a pressure in accordance with an operating
amount of the operating member, the first pilot pressure control unit in the discharge state causing the hydraulic fluid to
flow between the first tank port and the first supply/discharge port;

a second pilot pressure control unit including a second pump port connected to the pump flow path, a second tank port connected
to the tank flow path, and a second supply/discharge port, the second pilot pressure control unit being configured to be in
an output state when the first pilot pressure control unit is in the discharge state, the second pilot pressure control unit
in the output state causing the hydraulic fluid to flow between the second pump port and the second supply/discharge port
for outputting from the second supply/discharge port the hydraulic fluid of a pressure in accordance with the operating amount
of the operating member, the second pilot pressure control unit being configured to be in a discharge state when the first
pilot pressure control unit is in the output state, the second pilot pressure control unit in the discharge state causing
the hydraulic fluid to flow between the second tank port and the second supply/discharge port;

a first pilot flow path connected to the first supply/discharge port;
a second pilot flow path connected to the second supply/discharge port;
a first hydraulic pressure detector unit that is connected to the first pilot flow path and configured to detect a hydraulic
pressure in the first pilot flow path;

a second hydraulic pressure detector unit that is connected to the second pilot flow path and configured to detect a hydraulic
pressure in the second pilot flow path;

a communicating flow path connected to the tank flow path, the communicating flow path causing the hydraulic fluid to flow
between the first pilot flow path and the second pilot flow path;

a first restrictor disposed between the first pilot flow path and the communicating flow path;
a second restrictor disposed between the second pilot flow path and the communicating flow path; and
an actuator control unit configured to control the actuator based on the hydraulic pressure detected by the first hydraulic
pressure detector unit and the hydraulic pressure detected by the second hydraulic pressure detector unit,

the first hydraulic pressure detector unit being connected to the first pilot flow path at a position between the first pilot
pressure control unit and the first restrictor, and the second hydraulic pressure detector unit being connected to the second
pilot flow path at a position between the second pilot pressure control unit and the second restrictor.

US Pat. No. 9,238,901

SUPPORTING MECHANISM, EXHAUST TREATMENT UNIT, AND WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A supporting mechanism that supports a first exhaust treatment device and a second exhaust treatment device for treating
exhaust gas from an engine, the mechanism comprising:
a sub-bracket supporting the first exhaust treatment device and the second exhaust treatment device;
a base bracket supporting the sub-bracket;
a first supporting member supporting one side of the base bracket; and
a second supporting member supporting the other side of the base bracket,wherein
the base bracket includes
a first connecting part joined to the first supporting member;
a second connecting part joined to the second supporting member; and
a first pipe member and a second pipe member installed between the first connecting part and the second connecting part,wherein
the sub-bracket is fixed to the first pipe member and the second pipe member,
the sub-bracket extends outwardly in the lateral direction of the first pipe member and the second pipe member therefrom,
and

the sub-bracket is separated from the first connecting part and the second connecting part.

US Pat. No. 9,228,317

COOLING DEVICE AND CONSTRUCTION MACHINE OR WORKING MACHINE EQUIPPED WITH THE SAME

Komatsu Ltd., Minato-ku,...

1. A cooling device, comprising:
a cooling fan;
a shroud provided at an outer circumferential side of the cooling fan;
an inner circumferential wall fixed on the shroud and spaced apart from an outer circumference of the cooling fan in a radial
direction of the cooling fan by a predetermined distance to surround the cooling fan, the inner circumferential wall being
outside of and facing the cooling fan in the radial direction of the cooling fan; and

an outer circumferential wall provided to surround the inner circumferential wall, the outer circumferential wall being outside
of and facing the inner circumferential wall in the radial direction of the cooling fan, the cooling fan being rotatably disposed
in a radially inner space of the inner circumferential wall, an air-flow-direction downstream side end of the outer circumferential
wall being positioned at a further downstream position in an air flow direction than an air-flow-direction downstream side
end of the inner circumferential wall, at least a portion of the outer circumferential wall including a cylindrical surface,

wherein an air-flow-direction downstream side end of an outer circumferential edge of the cooling fan is positioned at a further
downstream position in the air flow direction than the air-flow-direction downstream side end of the inner circumferential
wall,

wherein the air-flow-direction downstream side end of the outer circumferential wall is located upstream in the air flow direction
with respect to the air-flow direction downstream side end of the cooling fan, and

wherein an interior covering ratio is in a range of 45% to 85%, the interior covering ratio being defined as a ratio between
(i) an air-flow-direction length of a portion of the outer circumferential edge of the cooling fan covered by the shroud and
the inner circumferential wall, and (ii) a maximum air-flow-direction length of the cooling fan.

US Pat. No. 9,217,236

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
a reductant injection device disposed in the engine compartment, and the reductant injection device being configured to inject
a reductant used for cleaning exhaust gas;

a reductant tank configured to store the reductant;
a reductant pump configured to draw up the reductant from the reductant tank and supply the reductant to the reductant injection
device;

a first pipe that connects the reductant tank to the reductant pump, and the first pipe being configured to supply the reductant
from the reductant tank to the reductant pump; and

a second pipe that connects the reductant pump to the reductant injection device and having a smaller inside diameter than
the first pipe, and the second pipe being configured to supply the reductant from the reductant pump to the reductant injection
device.

US Pat. No. 9,200,550

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
an engine;
a rotating frame configured to support the engine;
a vehicle body frame provided in a standing manner on the rotating frame, the vehicle body frame including a plurality of
column members;

a diesel particulate filtering device configured to process exhaust from the engine, the diesel particulate filtering device
being supported by the vehicle body frame, and the diesel particulate filtering device including a first tubular body portion;

a selective catalytic reduction device configured to process exhaust from the engine, the selective catalytic reduction device
being supported by the vehicle body frame, and the selective catalytic reduction device including a second tubular body portion;

a connecting pipe having an extendable bellows part in at least a portion thereof, the connecting pipe connecting the engine
and the diesel particulate filtering device; and

a connecting portion for the diesel particulate filtering device and the connecting pipe located at a lowermost point of the
diesel particulate filtering device in an elevational view of the vehicle body frame,

the diesel particulate filtering device being located further away from the engine than the selective catalytic reduction
device along a first direction on a horizontal plane,

the first tubular body portion of the diesel particulate filtering device and the second tubular body portion of the selective
catalytic reduction device being disposed apart from each other with a space therebetween in a plan view of the vehicle body
frame, and

a portion of the bellows part being located below the selective catalytic reduction device in an elevational view of the vehicle
body frame.

US Pat. No. 9,151,014

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine,
a selective catalytic reduction apparatus configured to treat exhaust from the engine;
a fuel tank including
a fuel tank body configured to retain fuel and
a fuel supply port configured to supply fuel to the fuel tank body; and
a reducing agent tank including
a reducing agent tank body configured to retain a reducing agent used in the selective catalytic reduction apparatus and
a reducing agent supply port configured to supply the reducing agent to the reducing agent tank body,
the fuel supply port protruding from the fuel tank body toward a first direction left or right with respect to a center axis
line in a front and back direction of the work vehicle, and

the reducing agent supply port protruding from the reducing agent tank body toward a second direction opposite to the first
direction with respect to the center axis line in the front and back direction of the work vehicle.

US Pat. No. 9,045,879

CONSTRUCTION MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A construction machine comprising:
an engine;
a hydraulic pump driven by drive force of the engine;
a generator motor disposed between the engine and the hydraulic pump and having a rotary shaft connected to an input shaft
of the hydraulic pump and to an output shaft of the engine, and an oil pan disposed in a lower part of a holding space formed
inside a housing;

a dipstick tube for the generator motor having a connector provided at a location that communicates with the oil pan of the
generator motor, and a dipstick opening disposed above the generator motor, for checking a level of oil in the oil pan; and

an engine dipstick tube for checking the oil level of the engine.

US Pat. No. 9,217,240

WORK VEHICLE, WORK VEHICLE DISPLAY DEVICE, METHOD OF CONTROLLING WORK VEHICLE DISPLAY DEVICE, BACKHOE LOADER, BACKHOE LOADER DISPLAY DEVICE, AND METHOD OF CONTROLLING BACKHOE LOADER DISPLAY DEVICE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle including a first work machine and a second work machine, comprising:
a seat for which an orientation position toward the first work machine and an orientation position toward the second work
machine can be switched;

a seat position detection unit configured to detect the orientation position of the seat;
a display unit configured to display information related to an operation state of the work vehicle; and
a control unit configured to change information displayed by the display unit according to the orientation position of the
seat detected by the seat position detection unit.

US Pat. No. 9,273,498

CAB FOR CONSTRUCTION MACHINE AND CONSTRUCTION MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A cab for a construction machine, said cab comprising a door and a door opening and closing mechanism for opening and closing
said door,
said door opening and closing mechanism including
a hollow tube having a hollow space therein and having a hole connecting said hollow space to outside of the tube,
a shaft support portion attached to said hollow tube, the shaft support portion having a pair of shafts protruding from respective
side surfaces facing each other in a width direction,

a handle having a base portion including a pair of side portions that sandwich both of said side surfaces and each have a
recess receiving a corresponding one of said pair of shafts, and a grip portion at an end of said base portion on the outside
of the tube, said handle being movable in a direction in which said handle is pushed into said hollow space, and

a restriction member disposed on outward sides of the pair of side portions of the base portion restricting a movement of
said base portion in said width direction, the restriction member disposed in a region extending between an end of said shaft
support portion on the grip portion side inward to an end of said base portion on a hollow space side of the base portion.

US Pat. No. 9,193,395

CAB AND WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A cab for a work vehicle comprising:
a cab body having a panel section, the panel section including a concave section recessed upward;
a floor frame including a convex section having an upwardly protruding shape, the convex section being arranged to protrude
from the concave section, the floor frame supporting the cab body;

a seal member having a first contact surface contacting the convex section, a second contact surface contacting the panel
section, and an inclined surface inclined with regard to the first contact surface and the second contact surface, the seal
member being configured to seal a gap between the concave section and the convex section; and

a bracket having an attachment section attached to the panel section and a pressing surface configured to press the inclined
surface.

US Pat. No. 9,482,139

DUMP TRUCK

KOMATSU LTD., Tokyo (JP)...

1. A dump truck comprising:
a main frame;
an engine installed to the main frame; and
an exhaust aftertreatment device that purifies exhaust gas from the engine, wherein:
the main frame is provided with a vertical member in a portal shape which projects at a back end of the engine in a vehicle
height direction of the dump truck and extends in a vehicle width direction of the dump truck,

the vertical member comprises: a pair of vertical frames that extend in the vehicle height direction with an interval therebetween
in the vehicle width direction increased in the vehicle height direction, and a cross frame that extends in the vehicle width
direction and bridges upper ends of the pair of vertical frames, at least one side of the cross frame in the vehicle width
direction being tilted toward an end thereof, and

the exhaust aftertreatment device is supported on a first side of the at least one side of the cross frame such that a center
of the exhaust aftertreatment device in a front-back direction is shifted backward relative to the vertical member.

US Pat. No. 9,267,268

MOTOR GRADER

KOMATSU LTD., Tokyo (JP)...

1. A motor grader, comprising:
a fuel tank for accumulating a fuel;
a vehicle body frame including a pair of first and second lateral frames disposed on first and second sides of the fuel tank
in a vehicle width direction, the vehicle body frame supporting the fuel tank;

lateral support parts being respectively disposed on the first and second lateral frames while being disposed on the first
and second sides of the fuel tank in the vehicle width direction, the lateral support parts fixing the fuel tank to the vehicle
body frame;

a rear support part being disposed on the first lateral frame while being disposed rearward of the fuel tank, the rear support
part fixing the fuel tank to the vehicle body frame; and

a reducing agent tank being disposed rearward of and adjacently to the fuel tank while being disposed closer to the second
lateral frame with reference to a middle in the vehicle width direction, the reducing agent tank accumulating a reducing agent
for processing an exhaust gas from an engine.

US Pat. No. 9,267,270

EXCAVATING TOOTH AND GROUND ENGAGING TOOL

KOMATSU LTD., Tokyo (JP)...

1. An excavating tooth configured to be mountable onto an adapter, the excavating tooth comprising:
a tooth body having a base end face and a pair of side walls, the tooth body extending in a first direction and the pair of
side walls being separated from each other along a second direction perpendicular to the first direction;

an insertion cavity formed in the base end face of the tooth body and defined by inner surfaces of the tooth body such that
the insertion cavity is disposed between the side walls, the insertion cavity being configured to be acceptable to the adapter;

a pair of supporting portions projecting from an innermost part of the insertion cavity, the supporting portions being separated
from each other along the second direction and disposed between the side walls; and

a pair of shaft holes passing through the side walls, respectively, of the tooth body along the second direction,
the insertion cavity having a depressed portion and a pair of extending recesses, the depressed portion being formed between
the pair of supporting portions, the pair of extending recesses extending in the first direction, and the pair of extending
recesses being formed on both sides of the pair of supporting portions.

US Pat. No. 9,273,447

CAB FOR CONSTRUCTION MACHINE AND CONSTRUCTION MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A cab for construction machine having an internal space, comprising:
an operator's seat arranged on a floor surface of said cab in said internal space;
a side window arranged laterally to said operator's seat;
a console arranged between said operator's seat and said side window;
an air-conditioning apparatus arranged in said internal space;
a cover arranged between said console and said side window; and
a bracket interposed between and fixed to said console and said cover,
a lower end of said side window being positioned lower than an upper end of said console positioned on the side close to said
side window in terms of height from said floor surface,

an upper end of said cover positioned on a side close to said side window being positioned on or below an imaginary straight
line connecting said upper end of said console positioned on the side close to said side window to said lower end of said
side window, and being positioned above said lower end of said side window,

said cab further comprising a duct connected to said air-conditioning apparatus and having a portion positioned between said
console and said side window when viewed from above.

US Pat. No. 9,181,678

BACKHOE LOADER

KOMATSU LTD., Tokyo (JP)...

1. A backhoe loader comprising a cab, a loader and an engine arranged forward of said cab, and a backhoe arranged rearward
of said cab, said loader including a pair of loader arms sandwiching said engine from a side, a loader bucket provided at
leading ends of said loader arms, and a loader bucket cylinder operating said loader bucket,
said backhoe loader comprising a foot mount member attached directly to an outer side of one of said loader arms to be horizontal
relative to a ground in a state where a bottom of said loader bucket is in contact with the ground.

US Pat. No. 10,017,913

CONSTRUCTION MACHINE CONTROL SYSTEM, CONSTRUCTION MACHINE, AND CONSTRUCTION MACHINE CONTROL METHOD

Komatsu Ltd., Tokyo (JP)...

1. A construction machine control system for a construction machine with a working device including a boom being rotatable about a boom axis with respect to a vehicle body, an arm being rotatable about an arm axis parallel to the boom axis with respect to the boom, and a bucket being rotatable about a bucket axis parallel to the arm axis and a tilting axis orthogonal to the bucket axis with respect to the arm, comprising:a target construction ground shape generation unit which generates a target construction ground shape indicating a target shape of an excavation target;
a working device control instruction determination unit which outputs an instruction for driving the working device in a working device operation plane orthogonal to at least one of the boom axis, the arm axis, and the bucket axis based on an operation state of at least one of the arm and the bucket and a distance between the bucket and the target construction ground shape; and
a tilting control instruction determination device which outputs an instruction for performing a tilting control of the bucket about the tilting axis based on a tilting state of the bucket and the distance between the bucket and the target construction ground shape.

US Pat. No. 9,487,158

CONTROLLER ASSEMBLY AND WORK MACHINE CAB

KOMATSU LTD., Tokyo (JP)...

1. A controller assembly, comprising:
an attaching member;
a coupling plate arranged below said attaching member;
a vibration suppressing member mounted between said attaching member and said coupling plate;
a first controller main body arranged above said attaching member; and
a coupling member coupling said coupling plate and said first controller main body, wherein
said first controller main body has a main body part having a first side face and a second side face opposite to each other,
and a connector provided at the first side face of the main body part, and

in a plain view, a size of said coupling plate in a direction from said first side face toward said second side face is smaller
than a size of said attaching member.

US Pat. No. 9,186,981

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
a work implement;
an engine;
an air blower;
an exterior cover covering said engine and said air blower;
a partition wall partitioning an internal space of said exterior cover into an engine compartment housing said engine and
a cooling compartment housing said air blower; and

a cooling unit disposed within said cooling compartment on the partition wall side with respect to said air blower,
said partition wall including a first wall portion inclined at a first inclination angle with respect to a direction in which
an upper side plate of said exterior cover located on the cooling compartment side with respect to said partition wall extends,
and a second wall portion inclined at a second inclination angle with respect to the direction in which said upper side plate
extends, said first inclination angle being greater than said second inclination angle,

an air intake port connecting an external space and said internal space of said exterior cover being provided in said upper
side plate so as to be located to face said second wall portion, and

said first wall portion inclined such that a portion closer to a lower end is located closer to said cooling unit, said first
wall portion being provided with an opening connecting said engine compartment and said cooling compartment.

US Pat. No. 9,440,833

ENGINE-POWERED FORKLIFT TRUCK AND METHOD OF RELEASING LOAD HANDLING INTERLOCK THEREOF

Komatsu Ltd., Tokyo (JP)...

1. An engine-powered forklift truck including a work device which is hydraulically driven by an oil hydraulic pump whose driving
source is an engine, comprising:
a load handling interlock mechanism configured to place a work device in a locked state by turning a key switch OFF or turning
a seat switch OFF and

a release control apparatus configured to, when the work device is in a locked state, determine whether the key switch is
ON and the engine is rotated at an engine speed less than a predetermined engine speed, and

(i) when the key switch is ON and the engine is rotated at an engine speed less than the predetermined engine speed, release
the work device from the locked state on condition that the key switch is ON, the seat switch is ON, and the engine is subsequently
rotated at an engine speed equal to or greater than the predetermined engine speed, and

(ii) when the key switch is ON and the engine is not rotated at an engine speed less than the predetermined engine speed,
release the work device from the locked state on condition that the key switch is ON and the seat switch is ON.

US Pat. No. 9,723,754

GROUND STRUCTURE OF CONTROLLER MOUNTED IN CONSTRUCTION MACHINE

Komatsu Ltd., Minato-ku,...

1. A ground structure of a controller that is mounted in a construction machine and is provided with a case comprising: a
plurality of heat release fins provided on a surface of the case; and a plurality of connector receiver holes for receiving
a connector being provided on the surface of the case, wherein the surface is rectangular in a plan view, the surface having
a pair of opposing long edges and a pair of opposing short edges, the plurality of heat release fins comprises comprise a
first heat release fin and a second heat release fin mutually intersected at an intersection and disposed in a crossing direction,
the first heat release fin and the second heat release fin are continuous with each other and are provided to define a T-shape
in an entirety thereof, opposing first and second ends of the T-shape extending to the two long edges of the surface, respectively,
and a third end of the T-shape extending to one of the pair of opposing short edges of the surface, the surface is defined
thereon with: a pair of first connector disposition faces each comprising a corner defined by the intersection and facing
one of the long edges and the one of the pair of opposing short edges; and a second connector disposition face provided outside
an area defined by the first heat release fin and the second heat release fin and facing another one of the pair of opposing
short edges of the surface, the plurality of connector receiver holes are provided on the pair of first connector disposition
faces and the second connector disposition face, a height of the connector disposed on the first and second connector disposition
faces is lower than a height of the first heat release fin and a height of the second heat release fin, a cable harness comprising
a plurality of cables including a ground cable is connected to the connector received in at least one of the plurality of
connector receiver holes, and a connecting portion for the ground cable to be connected is provided near said at least one
of the plurality of connector receiver holes on the surface for the connector to be connected.

US Pat. No. 9,343,865

LASER DEVICE

FURUKAWA ELECTRIC CO., LT...

1. A laser device comprising:
an optical fiber laser unit including
an amplification optical fiber;
a plurality of pumping light sources configured to output pumping lights for optically pumping the amplification optical fiber;
and

controller circuitry configured to control the pumping light sources, wherein
when an instruction value for supplying a predetermined driving electric current to each of the pumping light sources is input
to the controller circuitry, the controller circuitry conducts a control of supplying a compensated electric current value
as a driving electric current obtained by multiplying an initial electric current value corresponding to the instruction value
by a compensation coefficient and supplying the compensated electric current value to each of the pumping light sources,

the compensation coefficient is set to restrain a decrease in a power with time of a laser light output from the optical fiber
laser unit,

the compensation coefficient is a function of an accumulated driving time of each of the pumping light sources,
the plurality of the pumping light sources is a plurality of semiconductor pump lasers, and
the compensation coefficient is a function set to compensate for a decrease in a sum of powers of the pumping lights, the
decrease depending on an accidental failure rate of chips of the plurality of the semiconductor pump lasers.

US Pat. No. 9,555,845

ROLLER DEVICE FOR TRACK-TYPE WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A roller device for a track-type work vehicle, comprising:
a shaft having a rotation axis;
a bushing fitted over an outer circumference of said shaft to be rotatable relative to said shaft around said rotation axis;
a roller shell having a cylindrical shape and being fitted over the outer circumference of said bushing;
a retainer being formed annularly, being fixed detachably to an end of said bushing, and being fitted in an end of said roller
shell on a radially outer side; and

a seal disposed on the outer circumference of said shaft so as to seal a gap between said shaft and said bushing,
said seal including a first seal member attached to said bushing and a second seal member attached to said shaft, said first
seal member being rotatable relative to said second seal member,

said second seal member having a radially outermost circumferential surface disposed radially inward with respect to a radially
innermost circumferential surface of said retainer,

wherein said retainer abuts directly on an end face of said first seal member in the direction of said rotation axis of said
shaft.

US Pat. No. 9,324,200

WORK MACHINE, CONTROL SYSTEM FOR WORK MACHINE, AND CONTROL METHOD FOR WORK MACHINE

Komatsu Ltd., Tokyo (JP)...

1. A work machine including a tank which stores liquid, the work machine comprising:
a calculation unit configured to obtain a liquid amount difference which is a difference between an amount of the liquid inside
the tank detected at a first timing when the work machine stops operating and an amount of the liquid inside the tank detected
at a second timing after a timing when a key switch of the work machine is turned ON for a first time after the first timing,
wherein in a case where the calculation unit is not able to acquire the amount of the liquid due to malfunction occurred in
an in-vehicle signal line after the first timing, the second timing is a timing when the calculation unit comes to be able
to acquire the amount of the liquid after the malfunction of the in-vehicle signal line is resolved; and

a notification unit configured to notify abnormality information indicating occurrence of abnormal reduction of the liquid
inside the tank in a case where an operating time difference of the work machine during a period from the first timing to
the second timing is equal to or smaller than a first threshold and also the liquid amount difference is equal to or larger
than a second threshold, and further configured not to notify the abnormality information in a case where the operating time
difference of the work machine during the period from the first timing to the second timing is larger than the first threshold
and also the liquid amount difference is equal to or larger than the second threshold.

US Pat. No. 9,121,158

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
an engine;
a hydraulic pump to be driven by the engine;
a lower traveling unit configured to move the hydraulic excavator;
an upper structure on which a cab is mounted, the upper structure being revolvably arranged over the lower traveling unit;
a revolving motor for revolving the upper structure with respect to the lower traveling unit by means of hydraulic oil to
be supplied from the hydraulic pump;

a revolving operation lever for executing an operation of revolving the upper structure along with the cab over the lower
traveling unit;

an operation amount detection unit configured to detect an operation amount of the revolving operation lever, the operation
amount of the revolving operation lever being indicative of an amount of hydraulic oil to be supplied to the revolving motor
for revolving the upper structure with respect to the lower traveling unit; and

a control unit configured to control the engine according to one of two engine torque curves with different maximum engine
speeds, and to switch to the engine torque curve with a higher maximum engine speed when the detection result by the operation
amount detection unit is greater than a first threshold under a condition that the engine torque curve with the lower maximum
engine speed is being selected, the first threshold corresponding to 60% or more operation amount of the revolving operation
lever,

the control unit being further configured to switch from the engine torque curve with the higher maximum engine speed to the
engine torque curve with the lower maximum engine speed when the operation amount of the revolving operation lever becomes
less than a second threshold after having been greater than the first threshold, the second threshold being greater than zero
and less than the first threshold.

US Pat. No. 9,820,393

MONITOR AND WORKING VEHICLE PROVIDED WITH THE MONITOR

Komatsu Ltd., Minato-ku,...

1. A monitor comprising:
a display;
a circuit substrate that is electrically connected to the display;
a first connector that is installed on the circuit substrate and is configured to be connected to a second connector of an
exterior cable;

a resin-made exterior case that houses the display and the circuit substrate; and
a connector attachment portion that is provided on a planar portion of the exterior case opposed to the circuit substrate,
the connector attachment portion defining a space that is dented from the planar portion toward the first connector, wherein

the connector attachment portion comprises an opening through which the first connector protrudes such that an end of the
first connector is exposed to an outside of the exterior case,

at least a part of an inner circumferential surface of the connector attachment portion is provided by an inclined surface
portion that is enlarged toward the planar portion from the opening, and

an installation side of the first connector to the circuit substrate is disposed in an inner space of the exterior case.

US Pat. No. 9,322,149

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
a work implement having a boom, an arm attached to a distal end of said boom, and a bucket attached to a distal end of said
arm;

a design surface information acquiring unit for acquiring data of a design surface indicative of a target shape of a work
object by said work implement;

a cutting edge position computing unit for computing a position of a cutting edge of said bucket; and
an operation restricting unit for executing operation restriction control by which, when said cutting edge of said bucket
comes closer to said design surface, operation of said work implement is stopped before said cutting edge of said bucket reaches
said design surface, wherein

in a case where said cutting edge is located away from said design surface in a downward perpendicular direction by a prescribed
distance or longer, said operation restricting unit does not execute said operation restriction control.

US Pat. No. 9,353,504

REVOLVING APPARATUS FOR WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A revolving apparatus for a work vehicle, comprising:
a drive unit;
a brake unit disposed under the drive unit;
a deceleration unit disposed under the brake unit; and
an output unit disposed under the deceleration unit,
the brake unit having
a brake main body that stops revolution,
a housing having a first face and at least one first concave component formed in the first face,
a piston having a second face opposite the first face and at least one second concave component formed in the second face,
the piston being disposed between the brake main body and the housing, and the piston being movable with respect to the housing
in order to actuate the brake main body, and

at least one spring member having two ends held in the first concave component and the second concave component, the spring
member biasing the piston toward a brake main body side so as to actuate the brake main body,

the first concave component and the second concave component having cylindrical shapes, and
an inside diameter of the first concave component is greater than an inside diameter of the second concave component.

US Pat. No. 9,284,714

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator, comprising:
a boom;
a pilot switching valve for said boom having a boom-lowering pilot port and controlling operation of said boom;
a boom-lowering pilot conduit connected to said boom-lowering pilot port;
a boom-lowering proportional solenoid valve provided in said boom-lowering pilot conduit;
a control lever operated by an operator;
a first pressure sensor detecting a pressure generated in said boom-lowering pilot conduit between said control lever and
said boom-lowering proportional solenoid valve; and

a controller controlling an opening degree of said boom-lowering proportional solenoid valve based on the pressure detected
by said first pressure sensor, wherein

said controller gently increases, from zero, a current value outputted to said boom-lowering proportional solenoid valve.

US Pat. No. 9,194,104

WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A wheel loader comprising:
an engine;
a selective catalyst reduction device configured to treat exhaust gas from the engine;
a cab provided with a driver seat therein;
a ladder configured for ascending to and descending from the cab and provided on a lateral side of the cab;
a reducing agent tank disposed laterally inward of the ladder in a vehicle width direction of the wheel loader such that the
ladder overlaps the reducing agent tank in a lateral side view of the wheel loader, the reducing agent tank being configured
to store a reducing agent; and

an injection device configured to inject the reducing agent from the reducing agent tank into exhaust gas fed from the engine
toward the selective catalyst reduction device.

US Pat. No. 9,077,225

ARMATURE OF ELECTRIC MOTOR AND METHOD FOR MANUFACTURING ARMATURE OF ELECTRIC MOTOR

KOMATSU LTD., Tokyo (JP)...

1. An armature of an electric motor comprising:
a core including a plurality of slots and a plurality of teeth formed between the slots; and
a winding made of a plurality of wires bundled together in an irregular arrangement, the winding including a plurality of
coil portions wound around each of the teeth, and a plurality of connecting portions connecting the coil portions together,
the winding being wound around one of the teeth in a plurality of turns, the plurality of wires being arranged in an irregular
fashion so that positions of at least a portion of the wires are different on each turn in a radial direction and a peripheral
direction of the core, the winding having a twisted shape around a center of a bundle of the plurality of wires in the connecting
portions.

US Pat. No. 9,309,646

STEERING DEVICE FOR WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A steering device for a wheel loader in which a front frame and a rear frame are pivotably coupled in a horizontal direction,
the steering device comprising:
a handle operated by rotation for steering;
a lever operated by tilting for steering;
a steering cylinder configured to pivot the front frame in relation to the rear frame by expansion and contraction;
a steering valve configured to control a supply direction of operating fluid to the steering cylinder with pilot hydraulic
pressure;

a pump configured to supply operating fluid to the steering cylinder via the steering valve;
a handle control valve configured to supply pilot hydraulic pressure in order to control the supply direction to the steering
valve according to a rotation operation of the handle;

a lever electromagnetic control valve configured to supply pilot hydraulic pressure in order to control the supply direction
to the steering valve according to a tilting operation of the lever;

a handle prioritization valve configured to shut off the pilot hydraulic pressure supplied from the lever electromagnetic
control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced
due to operating fluid flowing through the handle control valve when the handle is operated;

a left pilot oil passage provided between the handle control valve and the steering valve; and
a right pilot oil passage provided between the handle control valve and the steering valve;
the handle prioritization valve including:
a priority control valve disposed between the handle control valve and the lever electromagnetic control valve and the steering
valve, the priority control valve including

a handle stage that allows communication between the handle control valve and the steering valve and that shuts off communication
between the lever electromagnetic control valve and the steering valve, and

a lever stage that shuts off communication between the handle control valve and the steering valve and allows communication
between the lever electromagnetic control valve and the steering valve; and

a switching valve that switches the priority control valve to the handle stage when a differential pressure is produced between
the left pilot oil passage and the right pilot oil passage.

US Pat. No. 9,200,426

BLADE CONTROL SYSTEM AND CONSTRUCTION MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A bulldozer blade control system comprising:
a lift frame vertically pivotably attached to a bulldozer vehicle body;
a blade supported by a frontward tip of the lift frame, the blade extending in a right-and-left direction of the bulldozer
vehicle body;

a lift cylinder configured to vertically pivot the lift frame;
a proportional control valve connected to the lift cylinder;
a lifting angle obtaining part configured to obtain a lifting angle of the lift frame with respect to a designed surface in
a side view of the bulldozer vehicle body, the designed surface formed as a three-dimensionally designed landform indicating
a target contour of an object for dozing;

an open ratio setting part configured to set an open ratio of the proportional control valve based on the lifting angle;
a distance calculating part configured to calculate a distance between the designed surface and a cutting edge of the blade;
a determining part configured to determine whether or not the distance between the designed surface and the cutting edge of
the blade is less than or equal to a threshold; and

a lift cylinder controlling part configured to open the proportional control valve at the open ratio set by the open ratio
setting part for elevating the blade when the determining part determines that the distance between the designed surface and
the cutting edge of the blade is less than or equal to the threshold.

US Pat. No. 9,074,344

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine;
a diesel particulate filter apparatus configured to treat exhaust from the engine;
a connecting pipe connecting the engine and the diesel particulate filter apparatus, the connecting pipe extending obliquely
downward toward the diesel particulate filter apparatus from a connecting position with the engine;

a selective catalytic reduction apparatus configured to treat exhaust from the engine, the selective catalytic reduction apparatus
being arranged above the connecting pipe;

a mounting bracket supporting the engine;
a vehicle frame elastically supporting the mounting bracket; and
a post-treatment apparatus support bracket supporting the diesel particulate filter apparatus and the selective catalytic
reduction apparatus, the post-treatment apparatus support bracket being supported by the mounting bracket.

US Pat. No. 9,333,915

WORK VEHICLE PERIPHERY MONITORING SYSTEM AND WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle periphery monitoring system comprising:
a plurality of image capturing devices each of which is attached to a work vehicle and captures a periphery of the work vehicle
to output an image information item;

a plurality of object detecting devices each of which is attached to the work vehicle to detect an object existing around
the work vehicle;

a bird's eye image synthesizing device that acquires the plurality of image information items and synthesizes the acquired
image information items to generate a bird's eye image information item for displaying a bird's eye image of the work vehicle
and the periphery of the work vehicle on a display device;

a display control device that displays a first image in which a mark representing the object detected by the object detecting
device overlaps the bird's eye image based on the bird's eye image information item on a screen of the display device;

an alarm notifying device that notifies, as an alarm, at least one or both of a first alarm of displaying a region with the
mark in a manner different from a region without the mark in the first image and a second alarm of notifying an existence
of the object by a sound;

an alarm releasing instruction device that receives an input for releasing the alarm; and
an alarm releasing device that releases the alarm in accordance with a releasing order which is prioritized and predetermined
regarding relations between a plurality of regions around the work vehicle and a plurality of running modes of the work vehicle
based on an alarm releasing signal from the alarm releasing instruction device,

wherein in a case in which: a highest priority is put on a first alarm region; alarm sound in the first alarm region is set
as high level; the alarm sound in the first alarm region is notified as the second alarm; and an operator operates the alarm
releasing device, the second alarm is released, the first alarm may be also released along with a release of the second alarm,
and the second alarm corresponding to an existence of the mark in the first alarm region is first released.

US Pat. No. 9,267,267

WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A wheel loader comprising:
a cab;
an engine room disposed rearward of the cab,
an engine disposed inside the engine room;
a first exhaust processing device and a second exhaust processing device disposed over the engine;
an air cleaner disposed in the engine room in front of the first exhaust processing device and the second exhaust processing
device; and

a tank disposed between the cab and the air cleaner in a vehicle front-back direction;
a rear surface of the tank having a lower rear surface part, an inclined surface part, and an upper rear surface part positioned
above the lower rear surface part and positioned forward of the lower rear surface part, the inclined surface part of the
rear surface of the tank being disposed between the lower rear surface part and the upper rear surface part in an up-down
direction and inclined forward and upward; and

at least a portion of the air cleaner being disposed facing the upper rear surface part.

US Pat. No. 9,206,584

HYBRID WORKING MACHINE AND METHOD OF CONTROLLING HYBRID WORKING MACHINE

Komatsu Ltd., Tokyo (JP)...

1. A hybrid working machine comprising:
an internal combustion engine;
a generator motor which is connected to an output shaft of the internal combustion engine;
a battery which stores power generated by the generator motor and supplies the power to the generator motor;
an electric motor which is driven by at least one of the power generated by the generator motor and the power stored in the
battery;

a transformer which is installed between the battery and the generator motor and between the battery and the electric motor;
a transformer temperature detecting sensor which detects a temperature of the transformer;
a battery temperature detecting sensor which detects a temperature of the battery;
a voltage sensor which detects a voltage of the battery; and
an overheat suppression control device which obtains a first transformer input limit power corresponding to the voltage detected
by the voltage sensor and changes the amount of the power regenerated by the electric motor supplied to the battery and the
amount of the power regenerated by the electric motor supplied to the generator motor based on the temperature of the transformer
detected by the transformer temperature detecting sensor and the temperature of the battery detected by the battery temperature
detecting sensor and the first transformer input limit power, and

wherein the overheat suppression control device changes the amount of the power regenerated by the electric motor supplied
to the battery and the amount of the power regenerated by the electric motor supplied to the generator motor based on a magnitude
relation of a first power running output that is determined based on voltage of the battery and allow the generator motor
to perform power running and a second power running output that is determined based on input and output power of the electric
motor and battery side input limit power based on the temperature of the battery and the temperature of the transformer and
allow the generator motor to perform power running.

US Pat. No. 9,180,774

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine;
a hydraulic pump aligned with the engine, the hydraulic pump being positioned lower than a top surface of the engine, the
hydraulic pump being configured to be driven by a driving force from the engine;

a working unit configured to be driven by a hydraulic fluid from the hydraulic pump;
a first exhaust gas processing device configured to process an exhaust gas from the engine;
a second exhaust gas processing device disposed over the hydraulic pump, the second exhaust gas processing device being configured
to process the exhaust gas from the engine; and

a first connection pipe, one end of the first connection pipe being connected to the engine, the other end of the first connection
pipe being connected to the second exhaust gas processing device,

wherein the first exhaust gas processing device is disposed closer to the engine than the second exhaust gas processing device,
the first connection pipe is connected to the second exhaust gas processing device while passing below the first processing
device.

US Pat. No. 9,109,348

MONITOR AND WORKING VEHICLE PROVIDED WITH THE MONITOR

Komatsu Ltd., Minato-ku,...

1. A monitor comprising:
a display;
a rubber frame comprising a surrounding face that is configured to surround an outer circumferential surface of the display;
and

a case comprising a housing, the housing being configured to receive and house the display that is fitted with the rubber
frame,

wherein the rubber frame comprises a projection that projects from a surface of the surrounding face and that is configured
to be elastically deformed based on being contacted by an inner circumferential surface of the housing that faces the projection,
and

wherein an outer side of the housing that is opposite the inner circumferential surface of the housing includes one or more
reinforcing ribs, the one or more reinforcing ribs being configured to receive the pressing force transmitted by the corresponding
projection for preventing the housing from deforming.

US Pat. No. 9,499,957

BULLDOZER WITH IMPROVED VISIBILITY

KOMATSU LTD., Tokyo (JP)...

1. A bulldozer comprising:
a vehicle frame having a front end and a rear end;
a pair of track frame modules arranged on left and right widthwise sides of the vehicle frame and extending in a longitudinal
direction of the vehicle frame;

a blade support member supported on the vehicle frame, the blade support member including a frontward end and a rearward end,
at least a rearward portion including the rearward end of the blade support member being disposed between the track frame
modules in a widthwise direction of the vehicle frame;

a bulldozer blade supported on the frontward end of the blade support member such that the bulldozer blade is disposed in
front of the front end of the vehicle frame;

an engine disposed at a front portion of the vehicle frame;
an operator cab secured to the frame behind the engine, the operator cab including a front window disposed on a front face
of the operator cab; and

an engine cover covering the engine, the engine cover configured and arranged such that when the bulldozer blade is placed
on the ground, an entire top surface of the engine cover is disposed below a line extending between an upper edge of the bulldozer
blade and a lower edge of the front window as viewed from a side of the bulldozer.

US Pat. No. 9,487,096

CHARGING DEVICE

Komatsu Ltd., Tokyo (JP)...

1. A charging device for charging a battery of a work vehicle provided with the battery and at least one motor and a power
source device and an in-vehicle control device, the motor being driven by power supplied from the battery, the power source
device receiving power from the battery, the in-vehicle control device receiving power from the power source device to control
an operation of the motor, the charging device comprising:
a power conversion unit configured to convert alternating-current power to direct-current power;
a control unit configured to control charging of the battery based on an instruction from an in-vehicle control device mounted
on the work vehicle;

a feed terminal configured to supply the direct-current power to the battery;
a communication terminal for communicating with the work vehicle;
a startup terminal for transmitting a signal for starting up the in-vehicle control device;
a startup signal generation unit configured to generate a signal for starting up the in-vehicle control device provided in
the work vehicle to transmit the signal to the power source device through the startup terminal; and

a charging device power source configured to transform power supplied from the battery of the work vehicle through the feed
terminal to supply the transformed power to the control unit,

wherein the control unit is started upon receiving the supplying of the power from the charging device power source, and
wherein the in-vehicle control device starts charging by sending an instruction signal to the control unit upon receiving
a startup-completion signal from the control unit.

US Pat. No. 9,469,973

WHEEL LOADER AND WHEEL LOADER ENGINE CONTROL METHOD

Komatsu Ltd., Tokyo (JP)...

1. A wheel loader comprising:
an engine;
working equipment configured to be driven by the engine;
a travel device configured to be driven by the engine;
a detector configured to detect a state of the working equipment and a state of the travel device, the detector comprising
at least an accelerator displacement detector configured to detect an accelerator displacement; and

a controller configured to store a plurality of torque curves defining different torque characteristics of the engine and
to select one of the torque curves for controlling the engine depending on a detection result provided by the detector, the
torque curves comprising one excavation torque curve and two or more non-excavation torque curves, the controller comprising:

a state judging unit configured to judge from the detection result provided by the detector whether or not the wheel loader
is in an excavation operation and whether or not the wheel loader is in a loading operation; and

a torque-curve selector configured to: select the excavation torque curve when the wheel loader is judged to be in the excavation
operation; select one of the two or more non-excavation torque curves depending on the accelerator displacement detected by
the accelerator displacement detector when the wheel loader is judged to be in the loading operation; and select and fix another
one of the two or more non-excavation torque curves with a smallest obtainable torque not depending on the accelerator displacement
when the wheel loader is judged to be neither in the excavation operation nor in the loading operation.

US Pat. No. 9,441,344

CONTROLLER ASSEMBLY, CAB FOR WORK MACHINE, AND WORK MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A controller assembly to be deployed in a cab for a work machine, comprising:
a base plate including a through hole and a frame surrounding said through hole, said frame having an upper surface and a
lower surface;

a bracket including first and second flange portions supported on the upper surface of said frame at positions opposite to
each other over said through hole, first and second side portions coupled respectively to said first and second flange portions
and passing through said through hole, and a bottom portion coupled to both of said first side portion and said second side
portion on a side of the lower surface of said frame;

a first controller main body mounted on said bottom portion of said bracket; and
a second controller main body provided on an upper side of said frame,
wherein distal most opposite ends of said first and second flange portions, distal most opposite ends of said first and second
side portions, and distal most opposite ends of said bottom portion define openings such that first and second distal most
opposite ends of the bracket are open.

US Pat. No. 9,441,346

WORK VEHICLE AND METHOD OF CONTROLLING WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle comprising:
a body;
a boom which is supported by the body and is turned;
a bucket which is supported by a side of the boom opposite to a side of the body and is turned;
a boom driving part which turns the boom;
a bucket driving part which turns the bucket;
a lifting force detector which detects lifting force as force that the boom driving part receives from the boom;
a vehicle speed detector which detects a speed at which the work vehicle runs;
a boom angle detection sensor which detects an angle of the boom; and
a control device configured to start a tilt operation of the bucket when a predetermined condition is established, and end
the tilt operation on the basis of an amount of increase of the lifting force from a time when the tilt operation is started,
wherein

the control device is configured to start the tilt operation on the basis of at least a detected result from the lifting force
detector and a detected result from the vehicle speed detector.

US Pat. No. 9,382,693

WORK VEHICLE AND WORK VEHICLE CONTROL METHOD

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
a work implement;
a switching valve which switches a supply direction of a first hydraulic fluid which is supplied to the work implement;
an operation member for operating the work implement;
a pilot pressure control valve which controls pressure of a second hydraulic fluid which drives the switching valve according
to an operation amount of the operation member;

an electromagnetic proportional valve which is installed between the switching valve and the pilot pressure control valve;
an upstream pilot flow path which connects the pilot pressure control valve and the electromagnetic proportional valve;
a pressure sensor which detects pressure of the second hydraulic fluid inside the upstream pilot flow path; and
a control section which selects at least one current value characteristic from among a plurality of current value characteristics
on the basis of the pressure which is detected by the pressure sensor, each of the current value characteristics expressing
a different correspondence relationship between a current value of a current which is output to the electromagnetic proportional
valve and the pressure of the second hydraulic fluid which is output from the electromagnetic proportional valve, the control
section setting the current value of the current which is output to the electromagnetic proportional valve on the basis of
the at least one current value characteristic which is selected.

US Pat. No. 9,376,950

REDUCING AGENT TANK AND WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A reducing agent tank comprising:
a container main body which stores a reducing agent;
a pipe which includes a suction port positioned in said container main body and guides said reducing agent from said suction
port to outside of said container main body; and

a strainer which is provided at said suction port of said pipe,
said strainer includes:
a surrounding portion having a first filter portion which surrounds an internal space of said strainer to partition said internal
space and an external space of said strainer and allows said reducing agent to pass through between said internal space and
said external space; and

a facing portion which extends into said internal space of said strainer to face with said first filter portion through a
gap space communicating with said suction port in said internal space and partition said gap space and said external space,
wherein

said surrounding portion has a peripheral portion which surrounds a periphery of said internal space, and a bottom portion
which closes a first end of said peripheral portion, and

an opening portion is formed at a second end of said peripheral portion, and
said facing portion has a cover portion which is attached to said second end, and a projecting portion which extends from
said cover portion into said internal space, and

said gap space is positioned between a Whole circumference of said projecting portion from a portion at which said projecting
portion is connected to said cover portion to a leading end portion of said projecting portion and said peripheral portion,
and between said leading end portion and said bottom portion, and

a dimension of said gap space between said leading end portion and said bottom portion is smaller than a thickness of said
bottom portion.

US Pat. No. 9,347,350

ENGINE UNIT

KOMATSU LTD., Tokyo (JP)...

1. An engine unit comprising:
an engine having an exhaust gas port;
an exhaust gas treatment device arranged above the engine; and
a connecting pipe connecting the exhaust gas port and the exhaust gas treatment device, the connecting pipe having an expandable-contractible
bellows portion,

the bellows portion having a linear form following an upward-downward direction, with a lower end part of the bellows portion
being positioned lower than at least a part of the exhaust gas port,

the connecting pipe having a first connecting pipe portion connecting the exhaust gas port and the lower end portion of the
bellows portion, and

the first connecting pipe portion having a form bending from the exhaust gas port toward a downward position lower than the
exhaust gas port.

US Pat. No. 9,309,946

CYLINDER WITH SHOCK ABSORBING FUNCTION

Komatsu Ltd., Tokyo (JP)...

1. A cylinder with a shock absorbing function which can detect a position of a piston rod reciprocating in a cylinder tube
and has a function of absorbing shock produced by the piston rod at its stroke end, the cylinder with a shock absorbing function
comprising:
a pair of piston valve sheets provided in a piston unit attached to a region of the piston rod closer to a cylinder bottom,
one of the pair of piston valve sheets being disposed closer to a cylinder head and the other being disposed closer to a cylinder
bottom;

a piston valve configured to reciprocate within a range between the piston valve sheets in a manner that the piston valve
is moved toward the cylinder bottom by working fluid introduced from a cylinder head side oil chamber to form a seal between
the piston valve and the piston valve sheet disposed closer to the cylinder bottom so as to prevent the working fluid from
flowing out toward the cylinder bottom, and that the piston valve is moved toward the cylinder head by working fluid introduced
from a cylinder bottom side oil chamber to form a seal between the piston valve and the piston valve sheet disposed closer
to the cylinder head so as to prevent the working fluid from flowing out toward the cylinder head;

a slider made of a nonmagnetic material slidably fitted onto the piston rod and allowed to make contact with the cylinder
head and a cylinder head side operating piece of the piston valve;

a valve piston provided in the piston unit in a region closer to the cylinder bottom and configured to push the piston valve
toward the cylinder head when the piston rod contacts a stroke end at the cylinder bottom, thereby releasing a seal formed
between the piston valve and the piston valve sheet disposed closer to the cylinder bottom;

a magnet holder ring attached to the piston rod so as to be positioned between the piston unit and the slider, and configured
to secure a magnet for detecting a position of the piston rod on a side facing the piston unit; and

a magnetism detector provided on an outer periphery of the cylinder tube and configured to detect a position of the piston
rod by detecting magnetism generated by the magnet.

US Pat. No. 9,243,382

RIPPER DEVICE FOR MOTOR GRADER, AND MOTOR GRADER EQUIPPED WITH THIS DEVICE

KOMATSU LTD., Tokyo (JP)...

1. A ripper device for a motor grader, comprising:
a ripper bracket configured to be attached to a rear end face of the body of a motor grader, the ripper bracket including
a pair of lower shaft supports disposed at lower portions of left and right sides of the ripper bracket;

a single ripper cylinder configured to raise and lower tooth members, the ripper cylinder having a head at one end and a bottom
part at an opposite end;

a frame component rotatably attached at a front end to the lower shaft supports of the ripper bracket, the frame component
having a frame bracket connected to the ripper cylinder in a state in which the head of the ripper cylinder is able to rotate,
the frame bracket being disposed in a widthwise middle part of the frame component near the ripper bracket;

a pair of ripper links attached to the ripper bracket such that front ends of the ripper links are able to rotate with respect
to the left and right sides of an upper part of the ripper bracket;

a pair of tooth brackets, to a lower end of which the tooth members are attached, and whose lower end is connected to a rear
end of the frame component at both ends of the frame component in a width direction of the frame component, and whose upper
end is connected to rear ends of the pair of ripper links, with the upper and lower ends of the tooth brackets both able to
rotate with respect to the frame component and the ripper links; and

a cylinder attachment bracket having a cylinder attachment shaft to which the bottom part of the ripper cylinder is connected
in a rotatable state in a middle part in the width direction of the motor grader, the cylinder attachment bracket being provided
between the pair of tooth brackets,

the cylinder attachment shaft of the ripper cylinder being disposed coaxially with rotational shafts of the pair of ripper
links and the pair of tooth brackets, the cylinder attachment shaft being separate and spaced apart from the rotational shafts
of the pair of ripper links and the pair of tooth brackets,

a rotational shaft of the frame bracket with respect to the head of the ripper cylinder being disposed coaxially with the
pair of lower shaft supports of the ripper bracket, the rotational shaft of the frame bracket with respect to the head of
the ripper cylinder being separate and spaced apart from the lower shaft supports, and

the ripper cylinder being disposed along a diagonal line of a parallelogram formed by the tooth brackets, the pair of ripper
links, the frame component, and the ripper bracket in side view.

US Pat. No. 9,228,318

COOLING DEVICE AND CONSTRUCTION MACHINE OR WORKING MACHINE EQUIPPED WITH THE SAME

Komatsu Ltd., Minato-ku,...

1. A cooling device, comprising:
a cooling fan;
a shroud provided at an outer circumferential side of the cooling fan;
an inner circumferential wall provided on the shroud and spaced apart from an outer circumference of the cooling fan in a
radial direction of the cooling fan by a predetermined distance to surround the cooling fan, the inner circumferential wall
being outside of and facing the cooling fan in the radial direction of the cooling fan; and

an outer circumferential wall provided to surround the inner circumferential wall, the outer circumferential wall being outside
of and facing the inner circumferential wall in the radial direction of the cooling fan, an air-flow-direction downstream
side end of the outer circumferential wall being positioned downstream, in an air flow direction, of an air-flow-direction
downstream side end of the inner circumferential wall, at least a portion of the outer circumferential wall including a cylindrical
surface,

wherein the cooling fan is rotatable in a space on a radially inner side of the inner circumferential wall,
wherein an air-flow-direction upstream side end of the cooling fan is positioned upstream, in the air flow direction, of an
air-flow-direction upstream side end of the inner circumferential wall and an air-flow-direction upstream side end of the
outer circumferential wall,

wherein the air-flow-direction downstream side end of the outer circumferential wall is positioned upstream, in the air flow
direction, of an air-flow-direction downstream side end of an outer circumferential edge of the cooling fan, and

wherein an exterior covering ratio is in a range of 55 to 95%, the exterior covering ratio being a ratio of (i) an air-flow-direction
length of a portion of the cooling fan covered by the shroud and the outer circumferential wall to (ii) a maximum air-flow
direction length of the cooling fan in the air flow direction of the cooling fan.

US Pat. No. 9,221,657

FORKLIFT AND CONTROL METHOD OF FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. A forklift equipped with a variable displacement traveling hydraulic pump driven by an engine, a hydraulic motor that forms
a closed circuit with the traveling hydraulic pump therebetween and is driven by hydraulic oil discharged from the traveling
hydraulic pump, and driving wheels driven by the hydraulic motor, the forklift comprising:
an accelerator operation unit configured to perform operation for increasing or decreasing an amount of fuel supplied to the
engine;

an accelerator opening sensor configured to detect an accelerator opening that is an operation amount of the accelerator operation
unit; and

a control device configured to calculate a target maximum absorption torque or a target swash plate tilting angle of the traveling
hydraulic pump based on the accelerator opening detected by the accelerator opening sensor to control the traveling hydraulic
pump,

wherein the control device includes
a modulation control unit configured to calculate, with reference to a table on which a setting value of a cut-off frequency
or a time constant according to the accelerator opening is described, the setting value from the accelerator opening detected
by the accelerator opening sensor, and calculate a corrected accelerator opening by correcting the accelerator opening detected
by the accelerator opening sensor using the obtained setting value,

a target value setting unit configured to calculate the target maximum absorption torque or the target swash plate tilting
angle depending on the corrected accelerator opening, and

the modulation control unit includes a modulation calculation unit configured to calculate the corrected accelerator opening
by correcting the accelerator opening detected by the accelerator opening sensor, using a greater value of a first setting
value calculated by applying the accelerator opening detected by the accelerator opening sensor to the table, and a second
setting value calculated by applying the corrected accelerator opening calculated at a timing before calculation of the first
setting value to the table.

US Pat. No. 9,215,806

MONITOR AND WORKING VEHICLE PROVIDED WITH THE MONITOR

Komatsu Ltd., Minato-ku,...

1. A monitor comprising:
a display;
a first circuit substrate that controls the display;
a second circuit substrate that is disposed with a clearance from the first circuit substrate;
a resin-made holder that is disposed in the clearance between the first circuit substrate and the second circuit substrate
and that holds the display; and

a flat cable that electrically connects the first circuit substrate and the second circuit substrate, wherein
the holder comprises a cable-insertion hole into which the flat cable is inserted, and
a first restrainer and a second restrainer are provided in the cable-insertion hole, the first restrainer and the second restrainer
being parallel to each other in a width direction of the flat cable to be inserted while being separated from each other in
a longitudinal direction of the flat cable.

US Pat. No. 9,115,483

HYDRAULIC EXCAVATOR AND METHOD FOR MEASURING STROKE OF HYDRAULIC CYLINDER OF HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
a base body portion formed of one of a vehicle main body and a boom;
a movable portion supported to be revolvable relative to said base body portion;
a hydraulic cylinder supporting said movable portion such that said movable portion is revolvable relative to said base body
portion;

a position sensor installed on said hydraulic cylinder to measure a stroke length of said hydraulic cylinder;
a rotary encoder installed across said base body portion and said movable portion, said rotary encoder including a light emitting
unit, a light receiving unit capable of receiving light emitted from said light emitting unit, and a disk unit having a plurality
of transmission portions that permit passage of the light emitted from said light emitting unit to said light receiving unit,
said disk unit being revolved in synchronization with revolution of said movable portion relative to said base body portion,
said light receiving unit outputting, based on the light having passed through said plurality of transmission portions, a
pulse signal generated according to an angle of revolution of said disk unit, said angle of revolution of said disk unit being
associated with an angle of revolution of said movable portion; and

a control unit measuring the stroke length of said hydraulic cylinder by correcting deviation of the stroke length, which
is measured by said position sensor, based on said pulse signal output from said rotary encoder.

US Pat. No. 9,061,582

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
an engine;
a selective catalytic reduction apparatus configured to process exhaust from the engine;
an outer cover;
a first column member supporting the outer cover;
a reducing agent tank configured to retain a reducing agent; and
a reducing agent pump configured to supply the reducing agent from the reducing agent tank to the selective catalytic reduction
apparatus,

the reducing agent pump being attached to the first column member.

US Pat. No. 9,057,437

FORKLIFT AND INCHING CONTROL METHOD OF FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. A forklift comprising:
a variable displacement hydraulic pump which is driven by an engine;
a hydraulic motor for forming a closed circuit between the hydraulic pump and the hydraulic motor, the hydraulic motor being
driven by pressure oil discharged from the hydraulic pump;

driving wheels which are driven by the hydraulic motor;
a working machine which is hydraulically driven by a variable displacement working machine hydraulic pump driven by the engine;
an accelerator operating unit for increasing or decreasing a fuel injection amount to the engine;
an inching operating unit for operating an inching ratio as a decrease ratio of a target absorption torque of the hydraulic
pump by the stepping of an inching pedal;

an actual engine speed detecting unit for detecting an actual engine speed of the engine;
a target engine speed calculating unit for calculating a target engine speed corresponding to the operation amount of the
accelerator operating unit;

an inching ratio calculating unit for calculating the inching ratio corresponding to the operation amount of the inching operating
unit;

a modulation control unit for setting an output time constant of the inching ratio in response to a speed difference between
the target engine speed and the actual engine speed so as to perform a modulation control outputting a correction inching
ratio having the output time constant set thereto; and

an output control unit for outputting an instruction of an absorption torque which decrease the target absorption torque at
the correction inching ratio output from the modulation control unit to the hydraulic pump.

US Pat. No. 9,500,114

WORK VEHICLE DISPLAY DEVICE AND WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle display device included in a work vehicle including an internal-combustion engine that generates power and
an exhaust gas processing device that processes exhaust gas discharged from the internal-combustion engine using urea water,
the work vehicle display device comprising:
a display unit configured to display an image; and
a display control unit configured to display either a first image or a second image different from the first image in the
display unit, the first image being an image including a display of at least a residual amount of fuel and a cooling water
temperature, the second image being an image including abnormal information of the exhaust gas processing device that processes
the exhaust gas using the urea water,

wherein the display control unit displays a residual amount of the urea water in the first image and the second image.

US Pat. No. 9,469,970

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
a traveling unit; and
a revolving unit mounted on the traveling unit, the revolving unit including
a revolving frame as a base
a right side section on a right side in a left and right direction of the revolving unit with respect to a center line of
the revolving unit, the center line extending in a forward and backward direction of the revolving unit, and

a left side section on a left side in the left and right direction of the revolving unit with respect to the center line,
a cab provided at a first of the right side section or the left side section,
a hand rail provided at a front edge on a second of the right side section or the left side section, the hand rail extending
upward from the front edge toward a rear of the revolving unit, and

a grip provided below the hand rail and on a side surface of the revolving frame, and
the traveling unit including
a track frame,
a step provided on a side surface of the track frame below the hand rail; and
a rear step,
when the revolving unit is positioned such that the forward direction of the revolving unit is identical to the backward direction
of the traveling unit, the bottom edge section of the hand rail at the front edge is positioned in front of a middle of the
rear step along the forward and backward direction of the revolving unit, and the grip is positioned behind the middle of
the rear step along the forward and backward direction of the revolving unit,

the grip being formed in a U-shape and extending in the vertical direction, a bottom end portion of the grip extending toward
the revolving frame, and

a tip end of the bottom end portion of the grip being separated from the revolving frame.

US Pat. No. 9,464,411

GROUND ENGAGING TOOL

KOMATSU LTD., Tokyo (JP)...

1. A ground engaging tool comprising:
a ground engaging tool body;
an excavating tooth having a tooth body, an insertion cavity and a supporting portion, the tooth body extending in a first
direction, the insertion cavity being formed in a base end face of the tooth body, and the supporting portion projecting from
an innermost part of the insertion cavity; and

an adapter having a fixed portion and an insertion portion, the fixed portion being fixed to the ground engaging tool body,
and the insertion portion extending from the fixed portion in the first direction and being inserted in the insertion cavity,
the insertion portion including a front end face disposed at an opposite end of the insertion portion from the fixed portion
in the first direction,

the supporting portion being separated from the front end face of the insertion portion by a gap in the first direction such
that a distance from the front end face to the fixed portion in the first direction is smaller than a distance from the supporting
portion to the fixed portion.

US Pat. No. 9,457,715

WORK VEHICLE PERIPHERY MONITORING SYSTEM AND WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle periphery monitoring system which monitors a periphery of a work vehicle including a vehicle body frame
supporting front and rear wheels and a vessel loading a load thereon, the work vehicle periphery monitoring system comprising:
an object detecting device which is attached to the work vehicle and detects an object existing at a rear side of the work
vehicle; and

a controller which notifies an alarm based on a detection result of the object detecting device and switches between a notification
mode for notifying the alarm and a standby mode for stopping the notification of the alarm,

wherein the controller sets the standby mode when the vessel stands up.

US Pat. No. 9,458,598

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
a work implement having a boom, an arm attached to a distal end of said boom, and a bucket attached to a distal end of said
arm;

a design surface information acquiring unit for acquiring data of a design surface indicative of a target shape of a work
object by said work implement;

a cutting edge position computing unit for computing a position of a cutting edge of said bucket; and
an operation restricting unit for forcibly raising said boom in accordance with a relative position between the position of
said cutting edge of said bucket and said design surface, wherein

in a state where said cutting edge is located away from said design surface in a downward perpendicular direction by a prescribed
distance or longer, said operation restricting unit executes control so as not to forcibly raise said boom.

US Pat. No. 9,457,685

INDUSTRIAL VEHICLE, SYSTEM FOR MANAGING OPERATION OF INDUSTRIAL VEHICLE, AND ELECTRIC FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. An industrial vehicle comprising:
a key-on signal detection unit that detects a first signal representing whether or not a key switch is in a key-on state;
an under-charging signal detection unit that detects a second signal representing whether or not a storage battery is being
charged;

an operating time calculation unit that calculates an operation time of the industrial vehicle, in which charging is not performed,
during the key-on state, based on both of the first signal and the second signal;

a display unit that displays various kinds of information; and
an output unit that displays and outputs the operating time on the display unit.

US Pat. No. 9,415,722

WORKING VEHICLE PERIMETER MONITORING SYSTEM AND WORKING VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A working vehicle perimeter monitoring system comprising:
a plurality of object detecting devices which are attached to a working vehicle and detect an object existing in a periphery
of the working vehicle; and

a controller which enables or disables a generation of an alarm notifying an existence of the object based on a detection
value of at least one of the object detecting devices and a predetermined threshold value and sets the predetermined threshold
value to be different inside and outside a predetermined region set in the periphery of the working vehicle based on an operation
range of the working vehicle,

wherein the predetermined region is set based on at least a trace of a front corner portion of the working vehicle when the
working vehicle turns at a minimum turning radius.

US Pat. No. 9,376,298

BATTERY POWERED FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. A battery powered forklift including a fork mounted on a front of a body to which a front wheel and a rear wheel are attached,
a counter weight provided on a rear of the body, and a driving electric motor that allows the body to travel, the forklift
comprising:
a battery mounted on the body above the rear wheel;
a cargo-handling electric motor configured to generate oil pressure on operating oil that operates the fork;
an operating oil tank that holds the operating oil;
a control device configured to control the cargo-handling electric motor and the driving electric motor;
a charging device for charging the battery; and
a storage space formed in the body, below a bottom of the battery, and above a bottom of the body,
wherein
the control device and the charging device are arranged in the storage space on both lateral sides of the body in a widthwise
direction, respectively, and

the operating oil tank and the cargo-handling electric motor are arranged in the storage space on a position overlapped with
a virtual straight line extending in a longitudinal direction on a center in the widthwise direction of the body and laterally
between the control device and the charging device in the widthwise direction so as to prevent a mass unbalance between the
lateral sides of the body, wherein the operating oil tank is arranged anterior to the cargo-handling, electric motor on the
body.

US Pat. No. 9,309,648

STEERING DEVICE FOR WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A steering device for a wheel loader in which a front frame and a rear frame are pivotably coupled in a horizontal direction,
the steering device comprising:
a handle operated by rotation for steering;
a lever operated by tilting for steering;
a steering cylinder configured to pivot the front frame in relation to the rear frame by expansion and contraction;
a steering valve configured to control a supply direction of operating fluid to the steering cylinder with pilot hydraulic
pressure;

a pump configured to supply operating fluid to the steering cylinder via the steering valve;
a handle control valve configured to supply pilot hydraulic pressure in order to control the supply direction to the steering
valve according to a rotation operation of the handle;

a lever electromagnetic control valve configured to supply pilot hydraulic pressure in order to control the supply direction
to the steering valve according to a tilting operation of the lever;

a handle prioritization valve configured to shut off the pilot hydraulic pressure supplied from the lever electromagnetic
control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced
due to operating fluid flowing through the handle control valve when the handle is operated;

a left pilot oil passage provided between the handle control valve and the steering valve; and
a right pilot oil passage provided between the handle control valve and the steering valve; and
a return oil passage configured to guide return oil from the steering valve to a tank via the handle control valve;
output ports of the lever electromagnetic control valve being connected to the left and right pilot oil passages; and
the handle prioritization valve including:
a throttle provided in the return oil passage between the handle control valve and the tank; and
a prioritization valve body provided between the output ports of the lever electromagnetic control valve and the left and
right pilot oil passages, the prioritization valve body including

a communication stage that allows communication between the output ports of the lever electromagnetic control valve and the
left and right pilot oil passages, and

a shutoff stage that shuts off communication between the output ports of the lever electromagnetic control valve and the left
and right pilot oil passages;

the prioritization valve body being switched to the shutoff stage when a differential pressure is produced on either side
of the throttle, and the prioritization valve body being switched to the communication stage when no differential pressure
is produced on either side of the throttle.

US Pat. No. 9,248,519

GEAR MACHINING APPARATUS AND GEAR MACHINING CONDITION SETTING DEVICE

KOMATSU LTD., Tokyo (JP)...

1. A gear machining condition setting device for outputting a machining condition in cutting a gear workpiece using a hob,
the gear machining condition setting device comprising:
a parameter receiving unit configured to receive
a feeding amount determining parameter containing a specification of the hob and a specification of the gear workpiece, and
a target temperature of a cutting edge of the hob during machining;
a first storage unit configured to store a cutting-in amount calculation formula representing a relation between a computed
cutting-in amount per a cutting blade of the hob and a characteristic value determined by the feeding amount determining parameter
and a relative feeding amount of the hob with respect to the gear workpiece;

a second storage unit configured to store a cutting-in amount upper limit per the cutting blade of the hob preliminarily set
by the specification and a material of the gear workpiece;

a feeding amount computing unit configured to compute a feeding amount of the hob using the cutting-in amount calculation
formula based on a selected cutting-in amount, the selected cutting-in amount being selected as one of the computed cutting-in
amount obtained from the cutting-in amount calculation formula and the cutting-in amount upper limit;

a third storage unit configured to store data of a constant temperature curve representing a relation between the cutting-in
amount and a cutting speed where the temperature of the cutting edge of the hob is set to be a predetermined temperature;
and

a cutting speed computing unit configured to compute the cutting speed corresponding to the selected cutting-in amount by
referring to a curve of the target temperature of the cutting edge of the hob in the constant temperature curve,

the gear machining condition setting device being configured to output a signal indicating the computed feeding amount and
cutting speed to a numerical control device that is arranged and configured to control a gear machining device having the
hob.

US Pat. No. 9,221,319

CAB FOR CONSTRUCTION MACHINE AND CONSTRUCTION MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A can for a construction machine, said cab comprising a door and a door opening and closing mechanism for opening and closing
said door, said door opening and closing mechanism including a hollow tube having a hollow space therein and having a hole
connecting said hollow space to outside of said hollow tube, and a handle having a base portion extending from said outside
of said hollow tube through said hole into said hollow space, and a grip portion located at an end of said base portion on
said outside of said hollow tube that is opposite to an end of said base portion on a side located within said hollow space,
said handle being supported by said hollow tube, said base portion and said grip portion are movable in a direction in which
said handle is pushed toward said hollow space, said hole having a first hole portion extending in a longitudinal direction
of said hollow tube and a second hole portion extending from said first hole portion in said longitudinal direction and having
a first section and a second section, and an outer dimension of said grip portion in a width direction orthogonal to said
longitudinal direction being greater than an outer dimension of said base portion in said width direction and greater than
a dimension of the first section of said second hole portion in said width direction, wherein said base portion comprises
one terminal end and another terminal end that define a length dimension of said base portion along said longitudinal direction,
wherein said one terminal end of said base portion is disposed in said first hole portion and said other terminal end of said
base portion is disposed in said first section of said second hole portion, wherein a dimension of said first section of said
second hole portion in said width direction is greater than a dimension of said second section of said second hole portion
in said width direction, and wherein a dimension of said first hole portion in said width direction is greater than the dimensions
of said first and second sections of said second hole portion in said width direction.

US Pat. No. 9,194,106

WORKING UNIT CONTROL SYSTEM, CONSTRUCTION MACHINE AND WORKING UNIT CONTROL METHOD

KOMATSU LTD., Tokyo (JP)...

1. A working unit control system comprising:
a working unit including a boom rotatably attached to a vehicle main body, an arm rotatably attached to the boom, and a bucket
rotatably attached to the arm;

an operating tool configured to receive a user operation to drive the working unit, the operating tool being configured to
output an operation signal in accordance with the user operation, the operating tool including an arm operating lever configured
to receive the user operation to drive the arm;

a work type determining part configured to determine that a work type of the working unit corresponds to a shaping work when
an arm operation signal outputted in response to an operation of the arm operating lever for operating the arm is included
in the operation signal, the work type determining part configured to determine that the work type of the working unit corresponds
to a cutting edge aligning work when the arm operation signal is not included in the operation signal; and

a drive controlling part configured to operate the working unit in a shaping mode when the work type determining part determines
that the work type corresponds to the shaping work and operate the working unit in a cutting edge aligning mode when the work
type determining part determines that the work type corresponds to the cutting edge aligning work, the drive controlling part
being configured to automatically move the bucket along a designed surface when the working unit is operated in the shaping
mode, the drive controlling part being configured to automatically stop the bucket in a predetermined position set with reference
to the designed surface when the working unit is operated in the cutting edge aligning mode, the designed surface indicating
a target shape of an excavation object.

US Pat. No. 9,163,380

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
an engine;
a rotating frame configured to support the engine;
a vehicle body frame provided in a standing manner on the rotating frame, the vehicle body frame including a plurality of
column members;

a diesel particulate filtering device configured to process exhaust from the engine, the diesel particulate filtering device
being supported by the vehicle body frame;

a selective catalytic reduction device configured to process exhaust from the engine, the selective catalytic reduction device
being supported by the vehicle body frame; and

a connecting pipe having an extendable bellows part in at least a portion thereof, the connecting pipe connecting the engine
and the diesel particulate filtering device,

the bellows part being located further away from the engine as the bellows part inclines further downward,
the diesel particulate filtering device and the selective catalytic reduction device being arranged in a row along a vehicle
width direction,

the bellows part inclining downward in the vehicle width direction,
at least a portion of the diesel particulate filtering device being located below the selective catalytic reduction device,
the diesel particulate filtering device being located further away from the engine than the selective catalytic reduction
device, and

a connecting portion used to connect the diesel particulate filtering device and the connecting pipe being located below the
diesel particulate filtering device.

US Pat. No. 10,071,440

DEVICE FOR PRODUCING METAL MEMBER

KOMATSU LTD., Tokyo (JP)...

1. A metal member producing device, the device comprising:a spindle;
a base portion arranged spaced apart from the spindle in an axial direction;
a driving portion configured to drive at least one of the spindle and the base portion in the axial direction of the spindle;
a first holding portion configured to hold a first member disposed on one of the spindle and the base portion; and
a mold configured to hold a second member disposed on the other of the spindle and the base portion to oppose the first holding portion,
the mold including
a bottom wall, and
an annular sidewall extending from the bottom wall in a direction that intersects the bottom wall, the annular sidewall encircling an entire circumference of the second member, the annular sidewall having a resistive wall formed thereon, the resistive wall being a wall surface inclined with respect to a plane parallel to the axial direction of the spindle so as to face the bottom wall.

US Pat. No. 9,506,223

DISPLAY DEVICE FOR CONSTRUCTION MACHINE

Komatsu Ltd., Minato-ku,...

1. A display device for a construction machine comprising:
a display unit that is configured to display one measurement value at a time; and
a display controller, wherein the display device is configured to display content based on display signals output from the
display controller, the display controller comprising:

a value converter that converts a plurality of measurements corresponding to different display ranges of a predetermined unit
into different values sharing a common scale such that the plurality of measurements are representable as a percentage of
the corresponding predetermined maximum acceptable amount of each of the plurality of measurements, and

a value determiner that determines a single converted value, among the different values converted by the value converter,
to be displayed on the display unit based on priority, wherein the determined single converted value is displayed on the display
unit such that the plurality of measurements corresponding to different display ranges are displayed one at a time on the
display unit based on the different values sharing the common scale, wherein the other of the different values that are not
displayed on the display unit are not displayed on the display device.

US Pat. No. 9,497,422

PERIMETER MONITORING DEVICE FOR WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A perimeter monitoring device for a work vehicle configured to monitor a surrounding of the work vehicle and to display
a monitored result on a display device, the perimeter monitoring device comprising:
a plurality of cameras attached to the work vehicle, each of the cameras being configured and arranged to obtain a camera
image capturing a portion of the surrounding of the work vehicle, the camera images together forming image data regarding
the surrounding of the work vehicle;

a bird's-eye image display unit configured and arranged to display a bird's-eye image of the surrounding of the work vehicle
on the display device based on the image data obtained by the cameras;

a plurality of obstacle detecting sensors attached to the work vehicle, the obstacle detecting sensors being configured and
arranged to respectively detect obstacles in the surrounding of the work vehicle;

a camera image specifying unit configured to specify which of the camera images captured by the cameras include at least one
obstacle detected by the obstacle detecting sensors, and to determine whether there is one or a plurality of the camera images
including at least one obstacle; and

a camera image displaying unit configured to select the one specified camera image when the camera image specifying unit specifies
only one of the camera images, and to select a most relevant one of the plurality of camera images based on a priority order
when a plurality of the camera images are specified by the camera image specifying unit, the camera image displaying unit
displaying the selected camera image separately from and adjacent to the bird's-eye image on the display device, the most
relevant camera image being a camera image having a highest priority ranking among the plurality of specified camera images
based on the priority order, the priority order being set in accordance with a travelling state of the work vehicle.

US Pat. No. 9,487,078

VEHICLE BODY COVER AND WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A vehicle body cover of a work vehicle, the vehicle body cover comprising:
an outside ventilation cover part having at least one outside ventilation hole that communicates with an external space, the
outside ventilation cover part being disposed in an inclined manner with respect to a vertical direction of the work vehicle;
and

an inside ventilation cover part disposed to face the at least one outside ventilation hole on an inside of the outside ventilation
cover part;

the inside ventilation cover part including
a rain gutter part configured to receive water that enters from the at least one outside ventilation hole; and
a ventilation part having at least one inside ventilation hole that communicates with a first space on an inside of the inside
ventilation cover part, the ventilation part being disposed above the rain gutter part, the ventilation part being arranged
and configured such that at least a portion of the at least one inside ventilation hole is at the same height in the vertical
direction as at least a portion of the at least one outside ventilation hole.

US Pat. No. 9,458,603

WHEEL LOADER AND CONTROL METHOD FOR WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A wheel loader comprising:
an engine;
a hydraulic pump driven by the engine;
a work implement having a bucket and driven by hydraulic fluid discharged from the hydraulic pump;
traveling wheels driven by the engine;
a travel drive device configured and arranged to transmit driving power from the engine to the traveling wheels, the travel
drive device including a torque converter and a transmission, the transmission including at least a first-speed gear and a
second-speed gear;

a level selecting unit for selecting a tractive force level of the wheel loader when the transmission is in the first-speed
gear, the tractive force level being selectable from among a plurality of levels including at least a first level and a second
level; and

a control unit for controlling the engine, the control unit being configured to
control the engine on the basis of a first tractive force characteristic that prescribes a first relationship between a vehicle
speed and a tractive force of the vehicle when the transmission is in the first-speed gear and the first level is selected;
and

control the engine on the basis of a second tractive force characteristic that prescribes a second relationship between the
vehicle speed and the tractive force of the vehicle when the transmission is in the first-speed gear and the second level
is selected, the second tractive force characteristic having a tractive force that is reduced in comparison with the first
tractive force characteristic.

US Pat. No. 9,459,166

CUTTING RESISTANCE ANALYSIS DEVICE, CUTTING AND MACHINING DEVICE EQUIPPED WITH SAME, AND CUTTING RESISTANCE ANALYSIS PROGRAM

KOMATSU LTD., Tokyo (JP)...

1. A cutting resistance analysis device adapted to calculate cutting resistance at a plurality of machining points along a
path of movement of a multi-blade rotary cutting tool in cutting and machining of a workpiece using the multi-blade rotary
cutting tool, the cutting resistance analysis device comprising:
a data storage section configured to store data related to a shape of the multi-blade rotary cutting tool, a number of blades,
and a shape of the workpiece;

a cutting resistance calculating section configured to calculate an amount of cutting resistance exerted on the multi-blade
rotary cutting tool at a plurality of machining points;

a contact blade count calculating section configured to calculate a number of blades of the multi-blade rotary cutting tool
that are simultaneously in contact with a machining face of the workpiece at the plurality of machining points;

a per-blade cutting resistance calculating section configured to calculate a cutting resistance per blade of the multi-blade
rotary cutting tool at the plurality of machining points based on the amount of cutting resistance and a calculation result
of the contact blade count calculating section at each of the machining points; and

a cutting resistance interpolation section configured to calculate by linear interpolation the cutting resistance per blade
between machining points based on the amount of cutting resistance per blade at a prescribed machining point calculated by
the per-blade cutting resistance calculator and the amount of cutting resistance per blade at a machining point adjacent to
the prescribed machining point,

the cutting resistance interpolation section being further configured such that when the cutting resistance per blade at an
upstream machining point along the path of the multi-blade rotary cutting tool is less than the cutting resistance per blade
at a downstream machining point, the cutting resistance interpolation section sets the cutting resistance per blade at the
downstream machining point as the amount of cutting resistance per blade between the downstream machining point and an adjacent
machining point to the downstream machining point.

US Pat. No. 9,394,668

BULLDOZER

KOMATSU LTD., Tokyo (JP)...

1. A bulldozer, comprising:
a blade;
an engine;
a first exhaust treatment device treating exhaust from the engine, the first exhaust treatment device being disposed at the
front of the engine;

a second exhaust treatment device treating exhaust from the engine, the second exhaust treatment device being disposed at
the front of the engine;

a relay connection pipe connecting the first exhaust treatment device and the second treatment device, the relay connection
pipe being disposed at the front of the engine;

an injector assembly attached to the relay connection pipe, the injector assembly including an injector injecting a reducing
agent into an interior of the relay connection pipe; and

an engine cover covering the engine, the first exhaust treatment device, the second exhaust treatment device, the relay connection
pipe, and the injector, the engine cover including an upper surface sloping forward and downward, and that covers said engine
and said first exhaust treatment device,

wherein:
the first exhaust treatment device, the relay connection pipe, and the second exhaust treatment device are arranged in sequence
such that the longitudinal directions thereof extend along the vehicle lateral direction;

an attachment surface for the injector on the relay connection pipe is provided on an offset portion of the relay connection
pipe at a connection portion between the first exhaust treatment device and the relay connection pipe; and

the distance between the injector assembly and a first side surface of the engine cover closest to the injector assembly is
substantially equal to the distance between the first side surface and the first exhaust treatment device.

US Pat. No. 9,388,690

TUNNEL EXCAVATION METHOD

KOMATSU LTD., Tokyo (JP)...

5. A tunnel excavation method in which a tunnel is excavated using a boring machine that performs excavation by rotating a
cutter head in a state in which a gripper is pressed against a side wall, the method comprising:
a first excavation step of excavating a first tunnel;
a preparation step of preparing a replacement face to substitute as a part of a side wall of a second tunnel at a planned
intersection portion between the first tunnel and the second tunnel;

a relocation step of relocating the replacement face to the planned intersection portion of the first tunnel, and using the
replacement face as part of the side wall of the second tunnel; and

a second excavation step of excavating the second tunnel by using the boring machine, and pushing of the gripper against the
replacement face and excavating at the planned intersection portion.

US Pat. No. 9,388,725

REDUCING AGENT TANK AND WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A reducing agent tank, comprising:
a container main body which has an opening formed in an upper face and stores a reducing agent;
a heat exchanger which performs heat exchange with said reducing agent; and
a top cover which covers said opening and supports said heat exchanger,
said heat exchanger including a first pipeline which guides a heat exchange medium into said container main body, a second
pipeline which allows a heat exchange medium to flow out from said container main body, and a turning portion, said first
pipeline and said second pipeline communicating with each other through said turning portion,

each of said first pipeline and said second pipeline having a suspended portion which extends from said top cover toward a
bottom face of said container main body, an extension portion which extends from a lower end of said suspended portion along
said bottom face toward a side face of said container main body, and a rising portion which extends from a leading end of
said extension portion along said side face toward said upper face of said container main body,

a length of each said extension portion along said bottom face being larger than a maximum inside length passing through a
center of said opening,

said rising portion of said first pipeline, said rising portion of said second pipeline, and said turning portion forming
a leading end bent portion of said heat exchanger,

a rising length of said leading end bent portion along said side face being smaller than a minimum inside length passing through
a center of said opening.

US Pat. No. 9,222,236

BULLDOZER AND BLADE CONTROL METHOD

KOMATSU LTD., Tokyo (JP)...

1. A bulldozer comprising:
a blade pivotably attached to a vehicle body;
a blade operation lever configured to output a lowering instruction signal, a holding instruction signal, and a raising instruction
signal for the blade; and

a blade control section configured to control a height of the blade according to the lowering instruction signal or the raising
instruction signal when the lowering instruction signal or the raising instruction signal is input,

the blade control section being further configured to execute an automatic lowering control of the blade to a predetermined
position after a transmission has been switched from a state, which is different from an advancing state, to the advancing
state, the blade control section withholding the execution of the automatic lowering control until the transmission has been
switched to the advancing state and, thereafter, the lowering instruction signal and the holding instruction signal have been
input in order.

US Pat. No. 9,212,467

ROTATING PARKING BRAKE CONTROL DEVICE FOR CONSTRUCTION MACHINERY

KOMATSU LTD., Tokyo (JP)...

1. A rotating parking brake control device for construction machinery adapted to control a rotating parking brake for braking
a moving body of the construction machinery, comprising:
a first controller performing drive control of a rotational electric motor and configured to generate a brake release command
signal and to output the brake release command signal to the rotating parking brake; and

a second controller operating independent of the first controller concerning the performing drive control of the rotational
electric motor and configured to generate a brake release command signal and to output the brake release command signal to
the rotating parking brake, wherein

the first controller receives inputs of the brake release command signal from the second controller and an operation signal,
the first controller outputs the brake release command signal when the input operation signal denotes operation of the moving
body and agrees with the brake release command signal input from the second controller, and

the first controller outputs no brake release command signal when the input operation signal denotes no operation of the moving
body and differs from the brake release command signal input from the second controller, and

the second controller receives inputs of the brake release command signal from the first controller and an operation signal,
the second controller outputs the brake release command signal when the input operation signal denotes operation of the moving
body and agrees with the brake release command signal input from the first controller, and

the second controller outputs no brake release command signal when the input operation signal denotes no operation of the
moving body and differs from the brake release command signal input from the first controller.

US Pat. No. 9,169,622

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
a revolving frame having a base plate formed thereon,
an engine arranged on said revolving frame, and
a counterweight arranged on said revolving frame, at a back side of said engine, said counterweight having a recess formed,
indenting from a bottom face in an upward direction,

said base plate having an opening formed for a person to gain access from a lower side of said revolving frame to a space
between said engine and said counterweight when said counter weight is arranged on said revolving frame,

said recess having a section overlapping with said opening, when viewed from a top of the hydraulic excavator.

US Pat. No. 9,163,386

WORK VEHICLE AND WORK VEHICLE CONTROL METHOD

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine;
a hydraulic pump configured to be driven by the engine;
a movement hydraulic motor configured to be driven by hydraulic fluid discharged from the hydraulic pump;
an acceleration operation member configured to be operated in order to set a target rotation speed for the engine;
a cut off valve configured to reduce a drive circuit pressure so that the drive circuit pressure does not exceed a predetermined
cut off pressure value, the drive circuit pressure being a pressure of the hydraulic fluid supplied to the movement hydraulic
motor; and

a control section configured to perform traction control in which a maximum traction force is reduced by limiting a displacement
of the movement hydraulic motor to an upper limit displacement which is smaller than a maximum displacement,

the control section controlling a pump displacement and the drive circuit pressure based on the pump displacement and drive
circuit pressure characteristics which show the relationship of the pump displacement and the drive circuit pressure and change
according to an engine rotation speed,

the control section storing upper limit displacement information which regulates the upper limit displacement of the movement
hydraulic motor with regard to an acceleration operation amount,

the control section determining the upper limit displacement of the movement hydraulic motor based on the upper limit displacement
information in the traction control,

the upper limit displacement information regulating the upper limit displacement of the movement hydraulic motor which is
constant irrespective of the acceleration operation amount when the acceleration operation amount is smaller than a predetermined
threshold,

the predetermined threshold being an acceleration operation amount which corresponds to an engine rotation speed when the
drive circuit pressure is constant at the cut off pressure value in the pump displacement and drive circuit pressure characteristics,

the upper limit displacement information regulating the upper limit displacement of the movement hydraulic motor which increases
according to an increase in the acceleration operation amount when the acceleration operation amount is the predetermined
threshold or more.

US Pat. No. 9,097,113

HYDRAULIC PUMP/MOTOR AND METHOD OF SUPPRESSING PULSATION OF HYDRAULIC PUMP/MOTOR

Komatsu Ltd., Tokyo (JP)...

1. An axial type hydraulic pump/motor in which a cylinder block provided with a plurality of cylinder bores slides on a valve
plate provided with suction and delivery ports and pistons reciprocate inside the respective cylinder bores to rotate an output
shaft or an input shaft rotates to discharge hydraulic oil from the suction and delivery ports, the hydraulic pump/motor comprising:
two pressure accumulation oil passages which accumulate pressure in two connecting passages that are obtained in a manner
such that, among two pairs of ports provided on the valve plate and provided at a top dead center side and a bottom dead center
side outside a slide and rotation trajectory area of the cylinder bores, a top dead center side port on a front side in a
rotation direction of the cylinder block is connected to a bottom dead center side port on the front side in the rotation
direction and a top dead center side port on a rear side in the rotation direction is connected to a bottom dead center side
port on the rear side in the rotation direction,

wherein each cylinder bore includes two communication holes that communicate with inside of the respective cylinder bore and
of which opening portions slide on the respective ports with rotation of the cylinder block to communicate with the pressure
accumulation oil passages, and

wherein each of the ports of each of the pressure accumulation oil passages exclusively communicates with the communication
holes so that a pressure accumulation operation is performed in which pressure inside of one of the cylinder bores is in a
corresponding one of the pressure accumulation oil passages through one of the communication holes and an accumulated pressure
collection operation is performed in which the pressure accumulated in the pressure accumulation oil passage is collected
in another of the cylinder bores.

US Pat. No. 9,051,709

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
an engine;
a radiator for cooling a liquid coolant for the engine;
a reservoir tank connected to the radiator and storing a portion of the liquid coolant; and
an engine hood having a body section and a case section, the body section defining an upper section of an engine room that
accommodates the engine, the case section being disposed on an inside surface of the body section and accommodating the reservoir
tank, the case section having at least two side plates and a bottom plate, the at least two side plates extending downward
from the body section, the bottom plate being connected to the at least two side plates.

US Pat. No. 9,599,225

BLOCKING CONFIGURATION OF OIL PRESSURE CIRCUIT HOLE

Komatsu Ltd., Tokyo (JP)...

1. A blocking configuration of an oil pressure circuit hole, comprising:
a plug screwed together with an aperture end portion of the oil pressure circuit hole provided to a main body, the plug including:
a shaft portion;
an external thread portion disposed on a leading end of the shaft portion;
an O-ring mounted on an outer periphery of a base end portion of the shaft portion and pressed between the outer periphery
of the shaft portion and an inner periphery of the oil pressure circuit hole to seal the oil pressure circuit hole and the
plug;

a flange portion having an external diameter larger than an external diameter of the shaft portion, the flange portion being
disposed on a part of a base end side of a storage groove on which the O-ring is mounted; and

a polygonal column-shaped head portion on which a tightening tool is mounted, the head portion being disposed on a part of
a base end side of the flange portion,

wherein
the flange portion has a plate thickness in a longitudinal direction of the shaft portion, smaller than both of a height of
the head portion, a height of the storage groove in the longitudinal direction and smaller than ¼ of the external diameter
of the shaft portion, and the head portion has a circumscribed circle diameter equal to or less than an aperture of the oil
pressure circuit hole, and

the flange portion is configured to be pressed, in a state of elastically deformed, on an outer surface of the main body with
a bearing surface of the flange portion, when the plug is screwed together with the aperture end portion of the oil pressure
circuit hole.

US Pat. No. 9,586,589

WORK VEHICLE AND METHOD FOR CONTROLLING SAME

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
an engine including a throttle device;
a hydraulic pump driven by the engine;
a work implement operatively arranged to be driven by hydraulic fluid discharged from the hydraulic pump;
a travel device driven by the engine, the travel device including at least one axle and at least one wheel to move the work
vehicle;

a power transmission device including an input shaft, a gear mechanism, an output shaft, and a motor/generator, the input
shaft being arranged to receive driving power from the engine and input the driving power to the gear mechanism, the gear
mechanism having a plurality of gears including a motor gear, the output shaft being arranged to receive the driving power
transmitted through the gear mechanism and transmit the driving power to the travel device, the motor/generator having a motor
shaft fixed to the motor gear, the power transmission device being configured such that a rotation speed ratio of the output
shaft with respect to the input shaft is changed by changing a rotation speed of the motor/generator;

an accelerator operating device including an accelerator operating member and an accelerator operation detector, the accelerator
operating member being configured to be operated by an operator to change an engine rotation speed, and the accelerator operation
detector being configured and arranged to detect an operation amount of the accelerator operating member;

a work implement operating device including a work implement operating member and a work implement operation detector, the
work implement operating member being configured to be operated by the operator to operate the work implement, and the work
implement operation detector being configured and arranged to detect an operation amount of the work implement operating member;
and

a control unit operatively arranged to receive detection signals from the accelerator operation detector and the work implement
operation detector and to transmit a command to the throttle device to control the engine rotation speed, the control unit
being programmed to increase a speed of the work implement by increasing the engine rotation speed such that a discharge flow
rate of the hydraulic pump increases when the operation amount of the work implement operating member is increased, the control
unit being configured to determine a target tractive force value based on the operation amount of the accelerator operating
member and to control an output torque of the motor so that a tractive force of the vehicle becomes equal to the target tractive
force value regardless of the operation amount of the work implement operating member.

US Pat. No. 9,507,360

MINE POWER MANAGEMENT SYSTEM

Komatsu Ltd., Tokyo (JP)...

1. A mine power management system comprising:
a first power line provided at an ascent and configured to exchange electric power with an ascending vehicle traveling on
the ascent;

a second power line provided at a descent and configured to exchange electric power with a descending vehicle traveling on
the descent;

a power supply and storage apparatus configured to exchange electric power at least between the first power line and the second
power line; and

an electric power control unit configured to control electric power allocation at least among a machine, the ascending vehicle,
and the descending vehicle so that a total electric power consumed by the machine, the ascending vehicle, and the descending
vehicle that exchange electric power with the power supply and storage apparatus is equal to or less than a total electric
power generated by the machine, the ascending vehicle, and the descending vehicle.

US Pat. No. 9,411,325

EXCAVATION CONTROL SYSTEM FOR HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. An excavation control system for a hydraulic excavator having a drive unit, a revolving unit being revolvable about a revolving
axis on the drive unit, and a working unit attached to the revolving unit, the excavation control system comprising:
a first data generating part configured to generate revolving unit disposition data, the revolving unit disposition data indicating
a disposition of the revolving unit;

a prediction correcting part configured to generate corrected revolving unit disposition data by predictively correcting the
revolving unit disposition data based on motion data, the motion data indicating a motion of the revolving unit;

a second data generating part configured to generate working unit position data based on the revolving unit disposition data
and the corrected revolving unit disposition data, the working unit position data indicating a position of the working unit;

a third data generating part configured to generate designed terrain data based on the working unit position data, the designed
terrain data indicating a target shape of an excavation object;

an excavation limit control part configured to limit a speed of the working unit with respect to the designed terrain in accordance
with a distance from the designed terrain, the distance obtained based on the working unit position data and the designed
terrain data;

the prediction correcting part configured to generate the corrected revolving unit disposition data by predictively correcting
the revolving unit disposition data based on the motion data and a delay time, the delay time including a time period required
for the second data generating part to generate the working unit position data and a time period required for the third data
generating part to generate the designed terrain data.

US Pat. No. 9,394,817

COOLING STRUCTURE FOR UREA AQUEOUS SOLUTION CONDUIT

KOMATSU LTD., Tokyo (JP)...

1. A cooling structure of a urea aqueous solution pipe laid to a selective catalytic reduction device in an exhaust gas aftertreatment
device, the exhaust gas aftertreatment device being provided in an engine compartment that is adjacent to a cooling fan through
which cooling air is supplied to a heat exchanger, the heat exchanger being disposed in a heat exchanger compartment, an air
in the heat exchanger compartment and the engine compartment being discharged by the cooling fan, the selective catalytic
reduction device using ammonia obtained from a urea aqueous solution as a reduction-causing agent, the urea aqueous solution
pipe supplying the urea aqueous solution to the selective catalytic reduction device through the engine compartment, the selective
catalytic reduction device being disposed above an engine, and the cooling structure comprising:
a pipeline-forming member provided in the engine compartment and comprising a pipeline in which the urea aqueous solution
pipe is arranged, the pipeline-forming member being provided at a position proximate to or in contact with an inside of a
hood defining a ceiling of the engine compartment; and

an air intake hole that is provided to the hood to intercommunicate the pipeline with an outside of the engine compartment,
wherein:
an end of the pipeline intercommunicates with the heat exchanger compartment,
the urea aqueous solution pipe is disposed in the pipeline from a urea aqueous solution tank set under the heat exchanger
compartment through the heat exchanger compartment and an end of the pipeline-forming member, and

the cooling air in a form of an outside air sucked by the cooling fan flows through the air intake hole into the pipeline
to be delivered to the heat exchanger compartment to cool the urea aqueous solution pipe.

US Pat. No. 9,383,754

MANAGEMENT SYSTEM AND MANAGEMENT METHOD

Komatsu Ltd., Tokyo (JP)...

1. A management system comprising:
a position detection device, installed in a dump truck which includes a vessel and travels at a loading site at a mine where
a loading work of a load is to be performed and a dumping site at the mine where an unloading work of a load is to be performed,
and on a haul road connecting the loading site and the dumping site, capable of detecting position information of the dump
truck; and

a processing device to which the position information of the dump truck detected by the position detection device is to be
output,

wherein the processing device specifies, based on the position information of the dump truck output from the position detection
device, time information indicating a start time and an end time of each of a plurality of operations of the dump truck including
at least one of an entrance wait operation of waiting at an entrance of the loading site after arriving at the entrance, and
a spot operation of moving to a loading position at the loading site after a wait state at a wait position at the entrance
of the loading site is released, and outputs, based on the time information and the position information of the dump truck,
an assignment instruction for the dump truck to one of the loading site and the dumping site at the mine.

US Pat. No. 9,374,723

COMMUNICATION MANAGEMENT SYSTEM AND COMMUNICATION MANAGEMENT METHOD

Komatsu Ltd., Tokyo (JP)...

1. A communication management system in which a work machine communicates with an outside of the work machine,
the communication management system comprising:
a work machine including: a communications carrier setting unit configured to set a communications carrier that provides a
communication service to generate information about the set communications carrier as communications carrier information;
and a communication unit configured to transmit the communications carrier information to the outside of the work machine;

a communication state analyzing unit configured to gather statistics on the communications carrier information included at
two or more different times among pieces of the communications carrier information transmitted from the communication unit,
the statistics gathering being performed for each of the times; and

a determining unit configured to determine whether an abnormality occurs in the communications carrier, from at least one
of a change over time in the number of the pieces of the communications carrier information acquired by the communication
state analyzing unit and a change over time in a rate of the communications carrier information among a plurality of the communications
carriers.

US Pat. No. 9,362,797

GENERATOR MOTOR AND WORK MACHINE

Komatsu Ltd., Tokyo (JP)...

1. A generator motor connected to an output shaft of an engine mounted in a work machine, the generator motor comprising:
a housing configured to be fixed to the engine of the work machine;
a rotation shaft that extends horizontally; and
a terminal box that is attached to the housing and that houses an entirety of a socket contact that is electrically coupled
to a stator coil of the generator motor, wherein the socket contact is oriented facing vertically downward and configured
to detachably connect to a pin contact provided on an exterior electric-power-supplying cable that extends vertically upward
toward a top surface of the generator motor, the pin contact being configured to be plugged in and unplugged from the socket
contact in a vertical direction from vertically underneath the socket contact.

US Pat. No. 9,354,627

CONTROL METHOD, CONTROL COMPUTER PROGRAM, AND CONTROL SYSTEM FOR WORK MACHINE

Komatsu Ltd., Tokyo (JP)...

1. A control method for a work machine, wherein the control method uses a terminal device connected to a control device via
a communication line, the control device controlling operational information acquired by the work machine, the control method
comprising:
acquiring, by the terminal device, a correlation between identification information for identifying operability for the work
machine and the operational information of the work machine, and

generating, by the terminal device, a correlation between personal information that can identify an operator who operates
the work machine and the operational information by using the correlation between the identification information and the operational
information and a correlation between the personal information that can identify the operator and the identification information.

US Pat. No. 9,327,773

CAB AND WORK MACHINE

KOMATSU LTD., Tokyo (JP)...

1. A cab comprising:
a floor portion;
a base arranged on said floor portion;
a driver's seat arranged on said base;
a back panel arranged behind said driver's seat, said base having a bracket extending toward said back panel; and
a controller main body arranged between said base and said back panel and fixed to said bracket, in a plan view, at least
a part of said controller main body being arranged between said base and said floor portion so as to overlap with said base,
and a fixing part fixing said controller main body to said bracket being arranged between a rear end of said base and said
back panel.

US Pat. No. 9,328,748

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
a cab having a rear wall; and
a cooling device arranged on a rear side of said rear wall,
said rear wall having an upright wall part extending in the vertical direction and an inclined wall part connected to an upper
edge of said upright wall part and inclined to a rear upper side with respect to the upper edge of said upright wall part,

an outer surface of said cooling device has a front surface facing said upright wall part and extending in the vertical direction,
and an inclined surface having a lower edge directly connected to an upper edge of said front surface at the upper edge of
said front surface, the inclined surface being inclined to the rear upper side with respect to the upper edge of said front
surface,

said inclined wall part having one edge connected to said upright wall part and the other edge opposite to said one edge,
the upper edge of said front surface being arranged below a height position of said other edge,

said upright wall part and said inclined wall part forming an angle more than or equal to an angle formed by said front surface
and said inclined surface.

US Pat. No. 9,309,647

STEERING DEVICE FOR WHEEL LOADER

KOMATSU LTD., Tokyo (JP)...

1. A steering device for a wheel loader in which a front frame and a rear frame are pivotably coupled in a horizontal direction,
the steering device comprising:
a handle operated by rotation for steering;
a lever operated by tilting for steering;
a steering cylinder configured to pivot the front frame in relation to the rear frame by expansion and contraction;
a steering valve configured to control a supply direction of operating fluid to the steering cylinder with pilot hydraulic
pressure;

a pump configured to supply operating fluid to the steering cylinder via the steering valve;
a handle control valve configured to supply pilot hydraulic pressure in order to control the supply direction to the steering
valve according to a rotation operation of the handle;

a lever electromagnetic control valve configured to supply pilot hydraulic pressure in order to control the supply direction
to the steering valve according to a tilting operation of the lever;

a handle prioritization valve configured to shut off the pilot hydraulic pressure supplied from the lever electromagnetic
control valve to the steering valve according to a differential pressure or an absolute pressure in a hydraulic circuit produced
due to operating fluid flowing through the handle control valve when the handle is operated;

a left pilot oil passage provided between the handle control valve and the steering valve; and
a right pilot oil passage provided between the handle control valve and the steering valve;
the handle prioritization valve including:
a priority control valve disposed between the handle control valve and the lever electromagnetic control valve and the steering
valve, the priority control valve including

a handle stage that allows communication between the handle control valve and the steering valve and that shuts off communication
between the lever electromagnetic control valve and the steering valve, and

a lever stage that shuts off communication between the handle control valve and the steering valve and that allows communication
between the lever electromagnetic control valve and the steering valve; and

a switching valve that switches the priority control valve to the handle stage when operating fluid flows to the handle control
valve, and that switches the priority control valve to the lever stage when operating fluid flows only to the lever electromagnetic
control valve.

US Pat. No. 9,260,032

BATTERY CHARGE/DISCHARGE CONTROL DEVICE, BATTERY CHARGE/DISCHARGE CONTROL METHOD, AND HYBRID WORKING MACHINE WITH BATTERY CHARGE/DISCHARGE CONTROL DEVICE

Komatsu Ltd., Tokyo (JP)...

1. A battery charge/discharge control device which performs battery charge/discharge control in a working machine with a battery
capable of storing electric energy generated by a generator motor coupled to an engine and driving the generator motor or
at least one of other electric actuators by the stored electric energy and a controller which controls a distribution of the
electric energy among the battery, the generator motor, and the electric actuator,
wherein the controller performs the charge/discharge control in which the electric energy of the battery is discharged when
the engine is driven and recharging to the battery is permitted on a condition that a cancelation signal for canceling prohibition
of recharging to the battery is received after the battery is completely discharged.

US Pat. No. 9,217,448

CYLINDER POSITION MEASURING DEVICE AND CYLINDER POSITION MEASURING METHOD

Komatsu Ltd., Tokyo (JP)...

1. A cylinder position measuring device for measuring a position of a linearly moving member that linearly moves inside a
cylinder tube, comprising:
a stroke position sensor for detecting a stroke position of the linearly moving member;
a magnet disposed on the linearly moving member;
a magnetic force sensor disposed outside the cylinder tube;
a stroke end abutment detecting system for detecting an abutment of the linearly moving member to a stroke end;
an arithmetic processing portion configured to perform a correction process to reset an original position of the stroke position
by using a detection value of the magnetic force sensor according to a movement of the linearly moving member while the linearly
moving member is not abutted to the stroke end, and not to perform the correction process at least about a first correction
process after the abutment when the linearly moving member has been abutted to the stroke end.

US Pat. No. 9,200,710

FLOATING SEAL

KOMATSU LTD., Tokyo (JP)...

1. A floating seal comprising C, Si, Mn, Ni, Cr, Mo, V, and B with a remainder being made up of Fe and unavoidable impurities,
wherein the the floating seal contains C, Si, Mn, Ni, Cr, Mo, V, and B in amounts as follows:
C: 2.2 to 3.9 wt %
Si: 0.5 to 3.5 wt %
Mn: 0.1 to 2.0 wt %;
Ni: 0.5 to 4.3 wt %;
Cr: 7.5 to 25.0 wt %;
Mo: greater than 0 to 8.0 wt %;
V: greater than 0 to 6.0 wt %;
B: 0.02 to 0.4 wt %; and
a content of Cr in a parent phase is 2.00 to 5.41 wt %;
a content of graphite is 0.05 to 0.35% of a surface area of the floating seal, and
a content of carbon boride is 19 to 40% of the surface area.

US Pat. No. 9,162,858

BATTERY-POWERED FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. A battery-powered forklift, comprising:
a vehicle body, which body has a front end and a rear end;
a battery mounted on the vehicle body;
a fork arranged at the front end of the vehicle body; and
a counterweight arranged at a rear part of the vehicle body and mounted on the vehicle body,
wherein the counterweight comprises post members, the post members protruding upwardly from the counterweight and arranged
at both left and right sides of the counterweight as seen from the rear end of the vehicle body, wherein the post members
guide movement of the battery when the battery is moved from the rear part to the rear end of the vehicle body along a front-rear
direction of the vehicle body.

US Pat. No. 9,151,016

OPERATOR PROTECTIVE GUARD, GUARD-EQUIPPED CAB FOR WORK MACHINE, AND WORK MACHINE

KOMATSU LTD., Tokyo (JP)...

1. An operator protective guard, comprising:
a plurality of first plate members each made of one plate; and
a plurality of second plate members each made of one plate,
said plurality of the first plate members and said plurality of the second plate members being assembled in a grid pattern
such that a first longitudinal direction of each of said plurality of the first plate members intersects with a second longitudinal
direction of each of said plurality of the second plate members,

at least two of said plurality of the first plate members being arranged radially as seen in said first longitudinal direction,
at least two of said plurality of the second plate members being arranged radially as seen in said second longitudinal direction,
a slit being formed in only one of said first plate member and said second plate member, the other of said first late member
and said second plate member not including any slits or depressions that correspond to the formed slit,

the other of said first plate member and said second plate member being fitted in said slit and fixed by welding, and
a dimension of said slit along the longitudinal direction of said one plate member is larger than a thickness of said other
plate member fitted in said slit.

US Pat. No. 9,145,806

EXHAUST TREATMENT UNIT AND WORK VEHICLE HAVING EXHAUST TREATMENT UNIT

KOMATSU LTD., Tokyo (JP)...

1. An exhaust treatment unit configured to treat exhaust from an engine, the exhaust treatment unit comprising:
a selective catalytic reduction apparatus configured to treat exhaust from the engine;
a connection pipe installed between the engine and the selective catalytic reduction apparatus;
an ejection apparatus attached to the connection pipe, the ejection apparatus being configured to eject a reducing agent into
the exhaust supplied to the selective catalytic reduction apparatus;

a first pipe section configured to guide coolant to the ejection apparatus to cool the ejection apparatus;
a second pipe section configured to discharge the coolant from the ejection apparatus;
a first coolant tank connected to the first pipe section above the ejection apparatus;
a second coolant tank connected to the second pipe section above the ejection apparatus;
a third pipe section connecting the engine and the first coolant tank, the third pipe section being configured to guide coolant
to the first coolant tank to cool the ejection apparatus;

a fourth pipe section connecting the engine and the second coolant tank, the fourth pipe section being configured to guide
coolant discharged from the ejection apparatus to the engine; and

a coolant pump configured to be driven by receiving driving force from the engine, the coolant pump being configured to supply
the coolant to the ejection apparatus via the first pipe section,

the first pipe section extending upward from a first connecting section of the first pipe section and the ejection apparatus
toward the first coolant tank,

the second pipe section extending upward from a second connecting section of the second pipe section and the ejection apparatus
toward the second coolant tank,

the first pipe section and the third pipe section being connected to a first side surface of the first coolant tank, and
the second pipe section and the fourth pipe section being connected to a second side surface of the second coolant tank.

US Pat. No. 9,133,780

WORK VEHICLE AND WORK VEHICLE CONTROL METHOD

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
a drive source;
a travel device configured to cause the work vehicle to travel by drive force from the drive source;
a hydraulic pump driven by drive force from the drive source;
a work implement driven by hydraulic fluid from the hydraulic pump;
a traction force detector configured to detect traction force of the work vehicle;
a lift force detector configured to detect a lift force for raising the work implement; and
a controller configured to
calculate a ratio of the traction force detected by the traction force detector with respect to the lift force detected by
the lift force detector, or a ratio of the lift force detected by the lift force detector with respect to the traction force
detected by the traction force detector,

compare the calculated ratio to a prescribed threshold value, and
execute traction force reduction control for reducing the traction force upon a first execution condition being satisfied,
the first execution condition being satisfied when the calculated ratio of the traction force with respect to the lift force
is larger than the predetermined threshold value, or when the calculated ratio of the lift force with respect to the traction
force is smaller than the predetermined threshold value.

US Pat. No. 9,625,033

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
an engine;
a transmission configured to convert a driving force from the engine;
a hydraulic oil supply circuit configured to supply hydraulic oil to the transmission;
a hydraulic oil warming circuit configured to warm up the hydraulic oil; and
a control unit configured to control the transmission, the hydraulic oil supply circuit, and the hydraulic oil warming circuit,
the transmission including
a hydraulic clutch; and
a clutch control valve configured to control a pressure of the hydraulic oil supplied to the hydraulic clutch according to
a command from the control unit, the control unit being configured to output a warming up command to cause the warming up
function to be performed when the control unit determines that the temperature of the hydraulic oil is low; and

the hydraulic oil warming circuit being configured to warm up the hydraulic oil by causing a pressure loss in a flow path
for the hydraulic oil.

US Pat. No. 9,425,499

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A Global Navigation Satellite System (GNSS) antenna device, comprising:
an antenna supporting part supported by a handrail disposed on an upper surface of a body of a work vehicle, the handrail
being provided at an edge of a passage deployed on the upper surface of the body of the work vehicle, the antenna supporting
part being disposed on a side of the handrail opposite to the passage; and

a GNSS antenna disposed on a top portion of the antenna supporting part.

US Pat. No. 9,410,306

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
a work implement;
an engine;
a main valve supplying a hydraulic oil to said work implement;
an exhaust gas treatment device treating an exhaust gas from said engine through a reduction reaction;
a reducing agent tank arranged at a forward side of said hydraulic excavator with respect to said main valve and storing a
reducing agent to be supplied to said exhaust gas treatment device; and

a partition plate arranged at a rearward side of said hydraulic excavator with respect to said reducing agent tank and at
the forward side of said hydraulic excavator with respect to said main valve, said partition plate serving as a partition
between a tank room housing said reducing agent tank and a valve room housing said main valve.

US Pat. No. 9,388,729

HYDRAULIC EXCAVATOR

KOMATSU LTD., Tokyo (JP)...

1. A hydraulic excavator comprising:
an engine;
a revolving frame supporting the engine;
a vehicle body frame including a plurality of column members disposed upright on the revolving frame;
a first exhaust treatment apparatus supported by the vehicle body frame, the first exhaust treatment apparatus being configured
to treat exhaust from the engine; and

a connecting pipe connecting the engine and the first exhaust treatment apparatus, at least a portion of the connecting pipe
including a bellows portion configured to be extendable and contractable,

the connecting pipe including a fixing portion fixed to the vehicle body frame, and
the fixing portion being positioned on the connecting pipe between the bellows portion and the first exhaust treatment apparatus.

US Pat. No. 9,382,690

ENGINE SUPPORT MECHANISM WITH AFTERTREATMENT DEVICE

Komatsu Ltd., Tokyo (JP)...

1. An engine unit mounted to a vehicle frame, the engine unit comprising:
an engine;
an aftertreatment device to purify exhaust gas emitted from the engine;
an engine support mechanism to be coupled to the vehicle frame, with vibration absorbing mechanisms respectively disposed
on both sides of the engine in an orthogonal direction to a crankshaft of the engine and on a side of the aftertreatment device,
to support the engine;

a base bracket provided to the engine support mechanism; and
an upper bracket detachably fixed and mounted to the base bracket, the upper bracket supporting the aftertreatment device,
wherein the base bracket has a base frame which extends in such a direction from a side of the engine support mechanism toward
the upper bracket, and away from the engine in a parallel direction to a rotation central axis of the crankshaft of the engine,
and which is supported on one end by the engine support mechanism,

wherein the base bracket is fixed to both the engine and the engine support mechanism, and
wherein the engine support mechanism, the base frame, the upper bracket, and the aftertreatment device are disposed at a same
end side in an extending direction of the crankshaft of the engine.

US Pat. No. 9,327,595

FIXING STRUCTURE OF RESIN TANK

KOMATSU LTD., Tokyo (JP)...

6. A fixing structure of a resin tank, the fixing structure comprising:
a first holder having a predetermined length and being disposed corresponding to a pressed portion of the resin tank;
a biasing member that is disposed in the first holder;
a pressing member that is supported by the first holder and projects toward the pressed portion by a biasing force of the
biasing member;

a pair of rods respectively having first ends attached to both ends of the first holder in a longitudinal direction and second
ends attachable to a frame; and

a second holder that is disposed in parallel to the first holder and in contact with the pressed portion, the second holder
being movable in an axial direction of the rods between the first holder and the pressed portion, wherein

the biasing member is a coil spring expandable and contractable in the longitudinal direction of the first holder,
the pressing member comprises: an insertion bar that is inserted into the coil spring and is biased by the coil spring in
a longitudinal direction of the first holder; a shaft that projects from an end of the insertion bar; and a roller that is
rotatably provided at the ends of the insertion bar and projects toward the pressed portion, and

the first holder has an elongated hole through which the shaft is inserted to guide the roller to project toward the pressed
portion.

US Pat. No. 9,316,136

ENGINE UNIT AND WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. An engine unit, comprising:
an engine;
a first exhaust gas treatment unit arranged above said engine and including a first exhaust gas treatment device and a second
exhaust gas treatment device;

a second exhaust gas treatment unit arranged above said engine and including a third exhaust gas treatment device and a fourth
exhaust gas treatment device;

a first connection pipe having an expandable first bellows part and guiding exhaust gas from said engine to said first exhaust
gas treatment device of said first exhaust gas treatment unit;

a second connection pipe having an expandable second bellows part and guiding the exhaust gas from said engine to said third
exhaust gas treatment device of said second exhaust gas treatment unit; and

a branch pipe dividing the exhaust gas from said engine, said first connection pipe connecting said branch pipe to said first
exhaust gas treatment device and said second connection pipe connecting said branch pipe to said third exhaust gas treatment
device, wherein

said first to fourth exhaust gas treatment devices are arranged to be located in an order of said first exhaust gas treatment
device, said second exhaust gas treatment device, said fourth exhaust gas treatment device, and said third exhaust gas treatment
device, such that respective longitudinal directions thereof extend next to each other,

said first connection pipe is routed through at least a partial region of a region directly underneath said second exhaust
gas treatment device and a region directly underneath said fourth exhaust gas treatment device,

said second connection pipe is routed through at least a partial region of the region directly underneath said second exhaust
gas treatment device and the region directly underneath said fourth exhaust gas treatment device, and

said branch pipe is disposed in at least a portion of regions directly underneath said second exhaust gas treatment device
and said fourth exhaust gas treatment device.

US Pat. No. 9,204,106

LOAD DISPLAY DEVICE FOR DUMP TRUCK

KOMATSU LTD., Tokyo (JP)...

1. A periphery monitoring and load displaying device for a dump truck that is a large work vehicle used in mining, the dump
truck having at least a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel, the periphery monitoring
and load displaying device comprising:
a plurality of cameras configured to be installed on the dump truck such that the cameras capture images covering an entire
360-degree periphery of the dump truck;

a detector configured to detect a load of the dump truck and generate load data corresponding to the detected load;
a controller arranged to receive the captured images from the cameras and the load data from the detector, the controller
being configured to combine the captured images to produce a bird's eye image that includes the dump truck, the front and
rear wheels of the dump truck, and the entire 360-degree periphery of the dump truck;

a display component configured to display the bird's-eye image including an image of the dump truck and the wheels of the
dump truck; and

the controller being configured to generate a simulated cargo image based on the load data and display the simulated cargo
image over a portion of the bird's eye image disposed between the rear wheels of the dump truck, the controller being configured
to switch a size of the simulated cargo image based on a size of the detected load.

US Pat. No. 9,181,963

OPERATION LEVER LOCK APPARATUS

Komatsu Ltd., Tokyo (JP)...

1. An operation lever lock apparatus applied to a forklift, the apparatus comprising:
a plurality of operation levers arranged rotatably with respect to a common lever rotation axis which is provided in a position
covered with a dashboard and is arranged in a lateral direction of a vehicle;

a plurality of hydraulic control valves which are arranged at a portion lower than a floor panel in a front part of the vehicle
and are arranged in parallel in the lateral direction, the plurality of hydraulic control valves having valve input parts
on upper surfaces of the hydraulic control valves, respectively; and

a plurality of link members, each of the plurality of link members extending downward from an operation base part of a corresponding
one of the operation levers to be connected to a corresponding one of the valve input parts,

wherein the hydraulic control valves are operated via the valve input parts by causing the link members to move vertically
via operation parts of the operation levers,

the apparatus further comprising:
an engagement member provided under the link member; and
a stopper member having an engagement part to be engaged in the engagement member,
wherein the stopper member is movable between an engaged position at which the engagement part engages in the engagement member
and a released position at which the engagement part is released from the engagement member, and arranged to restrict movement
of the link member in a vertical direction when positioned in the engaged position, and

the engagement part is open to one side of edges of the stopper member in the lateral direction of the vehicle with a releasing
notch, and

an actuator is supported by a bracket body in which the stopper member is movably arranged and a bias member to always bias
the stopper member towards the engaged position is arranged between the bracket body and the stopper member such that the
stopper member, the bracket body, the actuator, and the bias member are unitized, and

the stopper member, the bracket body, the actuator, and the bias member which are unitized are supported by a unit support
supporting the operation levers and the hydraulic control valves and are attached to the vehicle via the unit support.

US Pat. No. 9,166,415

AC LINK BIDIRECTIONAL DC-DC CONVERTER, HYBRID POWER SUPPLY SYSTEM USING THE SAME AND HYBRID VEHICLE

Komatsu Ltd., Minato-Ku,...

37. A hybrid power supply system, in which a main power supply of an engine electric generator is connected in parallel via
an AC link bidirectional DC-DC converter to an energy accumulation device while polarities thereof being matched, and electric
power from the main power supply drives an electrically driven device composed of an inverter and a motor, the hybrid power
supply system being characterized in that:
the AC link bidirectional DC-DC converter has two voltage inverters, each of said voltage inverters using semiconductor switching
elements, each of said semiconductor switching elements being formed by an IGBT and an antiparallel diode, the voltage inverters
having DC terminals connected to each other in series in additive polarity;

a plurality of AC terminals of each of the voltage inverters are connected to a transformer;
the two voltage inverters are AC-linked to each other via the transformer by connecting, of the two voltage inverters, AC
terminals of the voltage inverter on a negative DC terminal side to a primary coil of the transformer and by connecting AC
terminals of the voltage inverter on a positive DC terminal side to a secondary coil of the transformer;

the energy accumulation device is connected in parallel between a positive DC terminal and a negative DC terminal of the voltage
inverter on the negative DC terminal side of the AC link bidirectional DC-DC converter; and

a voltage of the main power supply applied between high voltage side DC terminals of the AC link bidirectional DC-DC converter
is divided by the voltage inverters, said system being used to power hybrid vehicles.

US Pat. No. 9,086,114

LIQUID SEALED MOUNT

Komatsu Ltd., Minato-ku,...

1. A hydraulic mount comprising:
a container configured to liquid-tightly seal a high-viscosity fluid therein;
a rubber mount that is provided on an upper side of the container;
a rod that is configured to move reciprocatively relative to the high-viscosity fluid in the container, the rod being configured
to move slidably relative to the rubber mount;

a damper plate that is provided to an end of the rod and located in a portion of the container that contains the high-viscosity
fluid, the damper plate including an outer circumferential surface that is fully continuous along an entire circumference
of the damper plate and is opposed to and spaced apart from an inner circumferential surface of the container, a fully continuous
and circumferential clearance being defined between the outer circumferential surface and the inner circumferential surface
to provide a flow path for the high-viscosity fluid, wherein the damper plate is continuous such that a downward movement
of the damper plate causes the high-viscosity fluid vertically below the damper plate to flow through the clearance, the flow
of the high-viscosity fluid through the clearance generating a damping force;

a main fluid chamber that includes an upper fluid chamber and a lower fluid chamber provided by vertically dividing an interior
of the container by the damper plate; and

a pressurizer that is configured to move in accordance with a movement of the high-viscosity fluid in the main fluid chamber
based on an axial movement of the rod to thereby correspondingly pressurize the sealed high-viscosity fluid so that the pressurized
high-viscosity fluid moves to the upper fluid chamber through the clearance.

US Pat. No. 9,074,343

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle comprising:
a vehicle body having an engine room and a first accommodating space partitioned from the engine room;
an engine having a crank shaft, an intake manifold arranged on a first direction side of the crank shaft, and an exhaust manifold
arranged on a second direction side of the crank shaft, the first direction side of the crank shaft being a first side along
a direction perpendicular to a longitudinal direction of the crank shaft, and the second direction side of the crank shaft
being on a second side opposite to the first side along the direction perpendicular to the longitudinal direction of the crank
shaft;

an exhaust treatment apparatus configured to clean exhaust from the engine with a reducing agent;
a connecting pipe connected to the exhaust treatment apparatus, the connecting pipe being configured to conduct exhaust from
the engine to the exhaust treatment apparatus;

a reducing agent injection apparatus arranged on the first direction side of the crank shaft, the reducing agent injection
apparatus being configured to inject the reducing agent inside the connecting pipe;

a reducing agent pump configured to discharge the reducing agent; and
a guiding pipe configured to guide the reducing agent from the reducing agent pump to the reducing agent injection apparatus,
the engine and the reducing agent injection apparatus being arranged inside the engine room,
the first accommodating space being positioned on a side of the engine room adjacent the first direction side of the crank
shaft,

the reducing agent pump being arranged inside the first accommodating space,
a temperature of the first accommodating space being lower than a temperature of the engine room,
the engine room having a space on an exhaust side and a space on an intake side, the exhaust side space being on the second
direction side of the crank shaft, the intake side space being on the first direction side of the crank shaft, and

the guiding pipe being arranged to pass inside the intake side space of the engine room.

US Pat. No. 9,074,346

WORK MACHINE AND CONTROL METHOD FOR WORK MACHINES

KOMATSU LTD., Tokyo (JP)...

1. A work machine comprising:
a hydraulic pump configured to discharge a hydraulic fluid;
a first actuator configured to be driven by the hydraulic fluid discharged from the hydraulic pump;
a first direction switch valve configured to switch between directions of supplying the hydraulic fluid from the hydraulic
pump, the first direction switch valve being configured to change an opening area of a flow path of the hydraulic fluid for
changing a flow rate of the hydraulic fluid to be supplied to the first actuator;

a second actuator configured to be driven by the hydraulic fluid discharged from the hydraulic pump;
a second direction switch valve configured to switch between directions of supplying the hydraulic fluid from the hydraulic
pump, the second direction switch valve being configured to change an opening area of a flow path of the hydraulic fluid for
changing a flow rate of the hydraulic fluid to be supplied to the second actuator;

a first operating part configured to operate the first actuator;
a second operating part configured to operate the second actuator;
a first hydraulic pressure detector unit configured to detect a hydraulic pressure to be supplied to the first actuator, and
a control unit configured to control the first direction switch valve such that the opening area of the first direction switch
valve is set to a reference value during a single operation, and such that the opening area of the first direction switch
valve is set to a value based on the hydraulic pressure detected by the first hydraulic pressure detector unit during execution
of a combined operation, the combined operation representing an operation of simultaneously operating the first and second
actuators, the single operation representing an operation of operating only the first actuator,

the control unit being configured to set the opening area of the first direction switch valve to the reference value even
during execution of the combined operation if the hydraulic pressure detected by the first hydraulic pressure detector unit
is larger than or equal to a predetermined threshold,

the control unit being configured to increase the opening area of the first direction switch valve in proportion to an increase
in the hydraulic pressure detected by the first hydraulic pressure detector unit during execution of the combined operation
while the hydraulic pressure detected by the first hydraulic pressure detector unit is smaller than the predetermined threshold.

US Pat. No. 9,045,045

WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle at least provided with a traveling motor, comprising:
a first control unit configured to generate a speed command value for controlling the motor and to change the speed command
value according to passage of time when an opening of an accelerator that adjusts a traveling speed is larger than 0, and
further to generate a first torque command value by assigning an actual traveling speed of the work vehicle to a relationship
between a torque command value that is a command value of torque to be generated by the motor and the traveling speed of the
work vehicle; and

a second control unit configured to generate a second torque command value based on the speed command value generated by the
first control unit and the actual traveling speed, and to control the motor based on either the first torque command value
or the second torque command value; wherein the first control unit is configured to obtains a speed from the first torque
command value and the actual traveling speed, and to determine that the second control unit controls the motor based on the
first torque command value when the speed is the speed command value or less, and the second control unit controls the motor
based on the second torque command value when the speed is larger than the speed command value.

US Pat. No. 9,540,011

WORK VEHICLE AND METHOD OF CONTROLLING WORK VEHICLE

Komatsu Ltd., Tokyo (JP)...

1. A work vehicle provided with an implement, the work vehicle comprising:
an engine;
a variable displacement travel hydraulic pump configured to be driven by the engine;
a hydraulic motor forming a closed circuit with the travel hydraulic pump and configured to be driven by hydraulic fluid discharged
from the travel hydraulic pump;

a driven wheel configured to be driven by the hydraulic motor to allow the work vehicle to travel;
a selector switch configured to detect an operating state of a traveling direction switching device configured to switch a
traveling of the work vehicle between forward and backward; and

a control device configured to set, in a case in which the selector switch detects a reversal operation of the traveling direction
switching device to reverse a traveling direction of the work vehicle when the work vehicle travels, a relationship between
a vehicle speed of the work vehicle and an upper limit of a rotational speed of the engine in a manner such that the upper
limit increases as an absolute value of the vehicle speed approaches zero, the control device being configured to obtain an
upper limit of a rotational speed of the engine from the set relationship and a vehicle speed of the work vehicle.

US Pat. No. 9,539,546

EXHAUST GAS PROCESSING DEVICE, DIESEL ENGINE, AND EXHAUST GAS PROCESSING METHOD

Komatsu Ltd., Tokyo (JP)...

1. An exhaust gas processing device comprising:
a plurality of exhaust gas passages, wherein exhaust gas exhausted from a diesel engine is divided to pass through the exhaust
gas passages;

a reducing catalyst which is provided in each of the exhaust gas passages and reduces NOx in the exhaust gas by a reducing
agent;

a NOx detection sensor which is arranged on an upstream side of the catalyst in an exhaust gas flowing direction and which
detects a concentration of NOx contained in the exhaust gas exhausted from the diesel engine;

a pressure sensor which is arranged on an upstream side of each of the reducing catalysts in the exhaust gas flowing direction
and which detects a pressure in each of the exhaust gas passages; and

a control device that obtains a flow rate of the exhaust gas flowing through each of the exhaust gas passages based on at
least a detection value of each of the pressure sensors, obtains a flow rate of NOx in each of the exhaust gas passages from
the obtained flow rate of the exhaust gas in each of the exhaust gas passages and the concentration of NOx detected by the
NOx detection sensor which is arranged on the upstream side of the catalyst in the exhaust gas flowing direction, and obtains
an amount of reducing agent to be supplied to each of the reducing catalysts from the obtained flow rate of NOx in each of
the exhaust gas passages.

US Pat. No. 9,535,724

INFORMATION PROCESSOR FOR WORK MACHINE, WORK MACHINE, AND INFORMATION PROCESSING METHOD FOR WORK MACHINE

Komatsu Ltd., Minato-ku,...

1. An information processor for a work machine, the information processor comprising:
a first board; and
a second board,
the first board comprising:
a main controller being configured to run on a built-in work machine operating system;
a first activator being configured to activate the main controller when an activation signal for activating the information
processor is inputted; and

an activation commander being configured to output an activation-command signal to the second board,
the second board comprising:
a PC controller being configured to run on an operating system for personal computers;
a communication unit being configured to communicate with an outside of the work machine;
an external-activation-signal sender being configured to output the activation signal to the first board when a specific signal
for commanding activation of the information processor is inputted to the communication unit from an outside of the work machine;
and

a second activator being configured to activate the PC controller when the activation-command signal outputted from the activation
commander is inputted.

US Pat. No. 9,481,260

INDUSTRIAL VEHICLE, SYSTEM FOR MANAGING STATE OF AMOUNT OF ELECTROLYTE OF INDUSTRIAL VEHICLE, AND ELECTRIC FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. An industrial vehicle comprising:
a storage battery that includes a plurality of battery cells including electrolyte and electrode plates, the battery cells
being connected in series, and a detecting point, disposed between the electrode plates of adjacent battery cells, at which
a voltage value for detecting a shortage of the electrolyte is detected;

an electrolyte shortage detection unit that detects a shortage of the electrolyte in at least one of the battery cells by
detecting a voltage value at the detecting point;

an electrolyte-shortage time calculation unit that calculates an electrolyte-shortage time, which is a cumulative time of
the shortage of the electrolyte detected by the electrolyte shortage detection unit when the shortage of the electrolyte continues;

a memory unit that stores the electrolyte-shortage time calculated by the electrolyte-shortage time calculation unit;
a time information generating unit that generates time information; and an output processing unit that performs output processing
for attaching the time information to the electrolyte-shortage time stored in the memory unit and outputting the electrolyte-shortage
time with the time information to an output unit, at a predetermined timing.

US Pat. No. 9,447,563

STROKE OPERATION DIAGNOSIS SUPPORTING DEVICE FOR HYDRAULIC CYLINDER

Komatsu Ltd., Tokyo (JP)...

1. A stroke operation diagnosis supporting device for a hydraulic cylinder, the stroke operation diagnosis supporting device
comprising:
movable portions sequentially supported rotatably to a vehicle main body;
hydraulic cylinders each disposed between the vehicle main body and the movable portion or between the movable portions and
rotatably supporting the movable portions;

a stroke sensor provided for the hydraulic cylinder and measuring a stroke length of the hydraulic cylinder;
a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke
sensor is reset;

a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder;
a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference
point and/or the stroke end position; and

a monitor displaying on a screen at least the measurement value of the stroke length obtained by the stroke sensor and a calibration
state obtained by the calibration process unit,

wherein
the monitor displays continuous time change of the measurement value of the stroke length obtained by the stroke sensor,
the monitor further comprises a calibration invalidating setting unit setting validity/invalidity of a calibration process
by the reset sensor that is conducted by the calibration process unit, and

when the calibration invalidating setting unit sets the invalidity of the calibration process, the calibration process unit
does not calibrate the measurement value of the stroke length.

US Pat. No. 9,388,771

INTAKE CONTROLLER AND METHOD OF INTAKE CONTROLLING FOR INTERNAL COMBUSTION ENGINE

Komatsu Ltd., Tokyo (JP)...

1. A turbocharged internal combustion engine, comprising:
an exhaust gas recirculation passage extracting a part of exhaust gas discharged from the internal combustion engine to recirculate
the part of the exhaust gas to an intake passage side of the internal combustion engine;

an exhaust gas recirculation valve arranged at the exhaust gas recirculation passage to control a flow rate of the part of
the exhaust gas to be circulated through the exhaust gas recirculation passage;

a fuel injection amount sensor detecting an amount of the fuel injected into the internal combustion engine;
a turbocharger comprising:
a turbine which is rotated by the exhaust gas exhausted from the internal combustion engine;
a compressor which is driven with rotation of the turbine to compress external air to the internal combustion engine; and
a variable turbo nozzle controlling a flow speed of the exhaust gas being supplied to the turbine; wherein a variable turbo
nozzle includes a circular nozzle ring; wherein the circular nozzle ring includes a slide mechanism to adjust a nozzle opening
and an opening forming a bypass passage to bypass an amount of the exhaust gas flowing in a turbine vane rotor via the circular
nozzle ring when the circular nozzle ring is fully closed; and

a controller including:
an engine controller receiving an amount of the injected fuel detected by the fuel infection amount sensor;
an actuator controller having executable instructions stored in a non-transitory memory to:
fully close the exhaust gas recirculation valve and the variable turbo nozzle when a manual forced regeneration process of
a diesel particulate filter is detected for reducing an amount of diesel particulate matter of the exhaust gas discharged
from the internal combustion engine;

control the exhaust gas recirculation valve from the fully closed state to a fully opened state and the variable turbo nozzle
from the fully closed state to a fully opened state; and

simultaneously close the bypass passage in response to the amount of the injected fuel detected by the fuel injection amount
sensor being equal to zero during a light load operation.

US Pat. No. 9,371,626

WORK VEHICLE

KOMATSU LTD., Tokyo (JP)...

1. A work vehicle, comprising:
a boom:
an arm;
a bucket;
an arm control member;
a speed limit calculation portion calculating a speed limit for limiting a speed of a cutting edge of said bucket based on
correlation with a distance between the cutting edge of said bucket and design topography;

a speed determination portion determining whether a speed of raising said boom has been lowered when an amount of operation
of said arm control member is smaller than a prescribed amount;

an adjustment portion delaying speed change to said speed limit when said speed determination portion determines that the
speed of raising said boom has been lowered as compared with when it is not determined that the speed of raising said boom
has been lowered; and

a boom speed determination portion determining a target speed of said boom based on a speed limit after delay by said adjustment
portion when it is determined that the speed of raising said boom has been lowered and determining a target speed of said
boom based on the speed limit calculated by said speed limit calculation portion when it is not determined that the speed
of raising said boom has been lowered.

US Pat. No. 9,365,401

BATTERY POWERED FORKLIFT

Komatsu Ltd., Tokyo (JP)...

1. A battery powered forklift including a fork mounted on a front of a body to which a front wheel and a rear wheel are attached,
a counter weight provided on a rear of the body, and a driving electric motor that allows the body to travel, the forklift
comprising:
a battery mounted on the body above the rear wheel;
a cargo-handling electric motor configured to generate oil pressure on operating oil that operates the fork;
a cargo-handling control device configured to control the cargo-handling electric motor;
a driving control device configured to control the driving electric motor;
a storage space provided in the body, below a bottom of the battery, and above a bottom of the body for storing the cargo-handling
electric motor, the cargo-handling control device and the driving control device, the storage space including an opening on
a front of the storage space;

a heat radiator provided in the storage space and attached on the bottom of the body, the heat radiator having a length side
and a width side, the length side being parallel to a lengthwise direction of the body, and

a fan that exhausts air in the storage space to an outside, wherein the fan includes at least one fan on each side of the
body in a widthwise direction,

wherein the cargo-handling control device and the driving control device are mounted onto the length side of the heat radiator,
and the driving control device is arranged in front of the cargo-handling control device.

US Pat. No. 9,270,665

WORK MACHINE, MANAGEMENT SYSTEM OF WORK MACHINE, AND METHOD OF MANAGING WORK MACHINE

Komatsu Ltd., Tokyo (JP)...

1. A work machine provided with a device configured to execute processing, the work machine comprising:
a communication terminal device configured to, when the communication terminal device has received a request command for causing
the device to execute processing from a command source outside the work machine, return notification of reception completion
to the command source, and output the request command to the device that executes processing corresponding to the request
command, and transmit processing completion notification indicating the processing has been completed to the command source
when the device that executes processing corresponding to the request command executed the processing.

US Pat. No. 9,127,436

WORKING VEHICLE ENGINE OUTPUT CONTROL SYSTEM AND METHOD

KOMATSU LTD., Tokyo (JP)...

1. An engine output control system for a work vehicle composed of an engine, a travel device and a power transmission unit,
the power transmission unit including a torque converter and transmitting an output of the engine to the travel device via
the torque converter, the engine output control system comprising:
a fuel dial configured to be operated by an operator;
a target engine speed setting portion configured to set a target value of an engine rotational speed of the engine according
to an operating amount of the fuel dial;

a speed ratio computation portion configured and arranged to compute a speed ratio of the torque converter;
a determination portion configured and arranged to determine whether the computed speed ratio is equal to or less than a speed
ratio threshold set in advance, the speed ratio threshold being smaller than a speed ratio at which a torque ratio of the
torque converter corresponds to a maximum efficiency of the torque converter, the speed ratio threshold being a speed ratio
equal to and below which the vehicle operates in a state selected from the group consisting of a nearly stalled state and
a completely stalled state, the nearly stalled state being when the speed ratio is roughly zero and the completely stalled
state being when rotation of an output side of the torque converter is stopped, and above which the vehicle does not operate
in a state selected from the group consisting of the nearly stalled state and the completely stalled state;

a storage unit configured and arranged to store data indicative of a relationship between the speed ratio of the torque converter
and a plurality of torque lines defining an output torque of the engine with respect to the engine rotational speed, the data
including at least a maximum torque line, a middle torque line, and a lowest torque line such that the output torque with
respect to the engine rotational speed is largest with the maximum torque line, smaller with the middle torque line than with
the maximum torque line, and smaller with the lowest torque line than with the medium torque line; and

an engine output reduction control portion configured and arranged to perform a reduction control of the output torque of
the engine when the computed speed ratio is equal to or less than the speed ratio threshold, the engine output reduction control
portion being configured to execute the reduction control of the output torque by referring to the data stored in the storage
unit and selecting one of the torque lines other than the maximum torque line in accordance with a difference between the
computed speed ratio and the speed ratio threshold such that the output torque of the engine is reduced in comparison with
the maximum torque line without changing the target value of the engine rotational speed, the selected torque line being shifted
downward toward the lowest torque line as the difference between the computed speed ratio and the speed ratio threshold increases,
the downward shifting of the selected torque line being executed in stages to discrete torque lines.

US Pat. No. 9,109,345

CONSTRUCTION MACHINE, METHOD FOR CONTROLLING CONSTRUCTION MACHINE, AND PROGRAM FOR CAUSING COMPUTER TO EXECUTE THE METHOD

Komatsu Ltd., Minato-ku,...

1. A construction machine comprising:
an undercarriage;
an upper revolving body;
a working equipment provided with a boom and an arm, the working equipment being provided on the upper revolving body;
a floating motion suppressing unit that suppresses a floating motion of the undercarriage corresponding to a motion of the
boom; and

a controller that controls the working equipment, wherein
power to the working equipment is distributed and fed to a boom driving device that moves the boom and an arm driving device
that moves the arm,

the controller comprises:
a manipulating signal input unit comprising a target value computing unit that generates a motion target value of the boom
based on a manipulating signal inputted by a boom manipulating unit that manipulates the boom;

a target value correcting unit that corrects the motion target value; and
a command signal output unit that outputs a command signal to the boom driving device based on the corrected motion target
value, and

the target value correcting unit comprises:
a motion information acquiring unit that acquires a motion information of the arm, the motion information being a motion speed
of the arm relative to the boom and being based on one of a manipulation command of the arm and a motion of the arm;

a maximum value determining unit that determines, based on the motion information, a maximum correction value for reducing
suppression of a floating motion by the floating motion suppressing unit based on the motion speed of the arm becoming greater
than a predetermined motion speed; and

a correction value regulating unit that corrects the motion target value based on the maximum correction value.

US Pat. No. 9,045,044

BATTERY CHARGE/DISCHARGE CONTROL DEVICE, BATTERY CHARGE/DISCHARGE CONTROL METHOD, AND HYBRID WORKING MACHINE WITH BATTERY CHARGE/DISCHARGE CONTROL DEVICE

Komatsu Ltd., Tokyo (JP)...

1. A battery charge/discharge control device which performs battery charge/discharge control in a working machine with a battery
capable of storing electric energy generated by a generator motor coupled to an engine and driving the generator motor or
at least one of other electric actuators by the stored electric energy and a controller which controls a distribution of the
electric energy among the battery, the generator motor, and the electric actuator,
wherein the controller performs the charge/discharge control in which the electric energy of the battery is discharged when
the engine is driven and recharging to the battery is permitted on a condition that a state in which an engine speed is equal
to or lower than a predetermined engine speed is maintained for a predetermined time after the battery is completely discharged.