US Pat. No. 9,163,599

STARTING DEVICE FOR AT LEAST ONE COMBUSTION ENGINE, IN PARTICULAR CABLE PULL STARTING DEVICE

MAKITA CORPORATION, Anjo...

1. A starting device for at least one combustion engine, in particular cable pull starting device for at least one two-stroke
or four-stroke engine, with at least one cable sheave or cable drum rotatably mounted in a housing, which for generating a
driving torque for a crankshaft can be put into rotary motion by means of at least one starter handle or pulling handle via
at least one force transmission means, in particular via a starter cable or pulling cable and is connected via at least one
elastic coupling link to at least one driving member, in particular to at least one pawl driver, by means of which the driving
torque can be transmitted to the crankshaft, the coupling link having two ends, wherein an end is in engagement with the driving
member and another end with the cable sheave or cable drum, wherein on the coupling link a rotary stop is provided, wherein
the rotary stop is designed as damping element, and wherein the damping element comprises a rubber element or the damping
element comprises a damping spring wherein the damping spring comprises windings.

US Pat. No. 9,061,393

SANDER

MAKITA CORPORATION, Anjo...

1. A sander comprising:
an upper portion configured as a holding portion;
side peripheral portions; and
a constriction formed in the side peripheral portions and continuously sunk into the side peripheral portions, the constriction
including a first constriction that extends in a horizontal direction and a second constriction that extends in a vertical
direction,

wherein the constriction is configured to be dent with respect to the holding portion.

US Pat. No. 9,115,645

ENGINE-DRIVEN CUTTER

MAKITA CORPORATION, Anjo...

1. A handheld engine-driven cutter comprising:
a disk blade; and
a main body that drives the disk blade, the main body comprising:
a four-stroke engine;
an oil supplying opening from which engine oil is supplied directly to the engine;
an oil exhausting opening from which the engine oil is exhausted; and
a fuel supplying opening from which fuel is supplied, the fuel supplying opening being disposed on a first side of the main
body

wherein the oil supplying opening and the oil exhausting opening are disposed on the first side of the main body, and the
main body is provided with no openings, other than the oil supplying opening and the oil exhausting opening, from which the
engine oil is supplied to or exhausted from the engine.

US Pat. No. 9,316,145

TWO-STROKE ENGINE

MAKITA CORPORATION, Aich...

1. A two-stroke engine comprising:
a cylinder provided with an approximately cylindrical shape; and
a piston that can reciprocate between a top dead center position and a bottom dead center position in the cylinder,
the cylinder including:
an exhaust port configured to be able to discharge exhaust gas; and
a scavenging port configured to be able to deliver scavenging air containing fuel and air in an anti-discharge direction approximately
opposite to a discharge direction of the exhaust gas, wherein:

the piston has a top surface, part of the top surface being concave and comprising a piston concave portion;
an entire surface of the piston concave portion having an approximately spherical shape; and
a slope of the piston concave portion extending from an outer circumferential edge of the piston concave portion in the discharge
direction, to a deepest portion, is steeper than a slope of the piston concave portion extending from an outer circumferential
edge of the piston concave portion, in the anti-discharge direction, to the deepest portion;

the piston concave portion has a width dimension extending in the discharge direction and in the anti-discharge direction
and orthogonal to a bore center line of the cylinder, and

a half or larger portion of the width dimension is on the exhaust port side with respect to the bore center line.

US Pat. No. 9,410,513

ENGINE CONFIGURED TO DRIVE A DIAPHRAGM FUEL PUMP USING PRESSURE FLUCTUATION IN A CRANK CHAMBER OF THE ENGINE

MAKITA CORPORATION, Aich...

1. An engine having a structure of a four-stroke engine, the engine comprising:
a piston configured to reciprocally move;
a crank chamber in which pressure fluctuation occurs by the piston moving reciprocally in the crank chamber;
a carburetor including a diaphragm fuel pump, the diaphragm fuel pump including:
a pump chamber configured to suck in and eject fuel; and
a diaphragm chamber to which a pressure that drives the pump chamber is supplied;
a single communicating path configured to allow communication between the diaphragm chamber and the crank chamber; and
an opening of the communicating path in the crank chamber side, the opening being formed near a position in which a termination
portion of a skirt part of the piston is located when the piston is located at a top dead center such that the piston opens
and closes the opening, wherein

the piston closes the opening of the communicating path when a positive pressure is created in the crank chamber and opens
the opening to supply substantially only a negative pressure from the crank chamber to the diaphragm chamber via the communicating
path, and

the opening is not open in a combustion chamber formed by a cylinder part and an upper portion of the piston.

US Pat. No. 9,321,164

IMPACT TOOL

MAKITA CORPORATION, Anjo...

1. An impact tool which actuates a tool reciprocally in a longitudinal direction of the tool and is configured to perform
a hammering operation to a workpiece, comprising:
a brushless DC motor which includes a rotational shaft, the brushless DC motor actuating the tool by means of a rotation of
the rotational shaft;

a battery for actuating the brushless DC motor;
a current providing device which provides current from the battery to the brushless DC motor, the current providing device
including a plurality of switching devices;

a controller which controls the plurality of switching devices of the current providing device;
a cooling fan which is driven by the rotation of the rotational shaft, and
a housing which houses the brushless DC motor, the current providing device and the controller, and includes an air inlet
that includes a plurality of openings and an air outlet,

wherein the controller and the current providing device are disposed inside a container, which is disposed inside the housing,
and the container and the brushless DC motor are arranged adjacently to each other such that the brushless DC motor is disposed
above the container in a direction perpendicular to longitudinal direction of the tool,

the air inlet is arranged only at a part of the housing which is located between the brushless DC motor and the container
in the direction perpendicular to the longitudinal direction of the tool,

the current providing device and the controller are arranged at an upper stream of the brushless DC motor with respect to
a flow of the cooling air, and

the air outlet is provided at a downstream of the brushless DC motor with respect to the flow of the cooling air.

US Pat. No. 9,333,636

WORK MACHINE HAVING MAIN POLE

MAKITA CORPORATION, Aich...

1. A work machine, comprising:
a proximal end;
a distal end;
a main pole internally comprising a separable rotation shaft, the main pole extending in a longitudinal direction between
the proximal end and the distal end, and the main pole comprising a first partial pole, a second partial pole and a joint
member,

the joint member having a through hole configured to accept insertion of the first partial pole from a first side of the through
hole, wherein the first partial pole is configured to be removably inserted into the first side of the through hole, and the
joint member being attached to the second partial pole at a second side of the through hole,

the first partial pole having a positioning member configured to be biased by a biasing member toward the joint member,
the joint member having a positioning hole configured to engage with the positioning member and a guide groove extending from
the positioning hole toward the first side of the through hole and configured to guide the positioning member to the positioning
hole,

the guide groove penetrating an inner surface of the joint member,
the guide groove comprising a first tapered section and a second tapered section adjacent to each other in the longitudinal
direction, wherein the first tapered section has a different inclination than the second tapered section, and wherein a depth
of the guide groove, as defined by the tapered sections, increases in a direction from the positioning hole toward the first
side of the through hole,

a tool unit located the distal end, the tool unit configured to hold a tool connected to the rotation shaft; and
a power unit located at the proximal end, the power unit comprising a prime mover configured to drive the rotation shaft.

US Pat. No. 9,296,079

DUST COLLECTING DEVICE

MAKITA CORPORATION, Anjo...

1. A dust collecting device, which is attached to a power tool that performs a predetermined operation on a workpiece by driving
a tool bit coupled to a front end region of a tool body, and collects dust generated by operation, comprising:
a dust collecting part that covers the tool bit over a predetermined range in an axial direction and collects dust generated
by operation,

wherein the dust collecting part comprises (i) a dust collecting part component, which has a tool bit covering part having
a predetermined inside diameter, one end of the dust collecting part component being configured to be attached to the power
tool, and (ii) a fitting part, which is formed separately from the dust collecting part component and has a substantially
constant inside diameter, the fitting part being detachably attached to another end of the dust collecting part component
such that the fitting part is configured to form a suction port and is configured to be detachably attached to another dust
collecting part component which is formed separately from the fitting part, and

wherein the tool bit covering part comprises a cylindrical accordion part which can contract and extend, and the fitting part
comprises a ring-like reinforcing member which is formed separately from the accordion part.

US Pat. No. 9,282,695

ELECTRIC POWER MOWER

MAKITA CORPORATION, Anjo...

1. An electric power mower, comprising
a cutter configured to cut grasses;
a main body configured to support the cutter;
at least one wheel supported by the main body in a rotatable manner;
an electric motor configured to apply torque to the at least one wheel;
a battery interface configured to removably receive a plurality of battery packs including a first battery pack and a second
battery pack each of the first and second battery packs being originally designed as a power source of a handheld electric
power tool; and

an electric circuit unit configured to electrically connect at least the first and second battery packs attached to the battery
interface with the electric motor whereby the at least one wheel is driven by electric power supplied from the first and second
battery packs.

US Pat. No. 9,136,721

POWER SUPPLY DEVICE FOR ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power supply device for electric power tool that is configured to supply an electric power to an electric power tool,
the power supply device comprising:
an adapter configured to be electrically connected to the electric power tool in a detachable manner from the electric power
tool;

a fuel cell configured to generate an electric power to be supplied to the electric power tool through the adapter, by causing
an oxidation reaction between a fuel and an oxidant;

a charge unit configured to supply the electric power generated in the fuel cell to charge a rechargeable battery, the rechargeable
battery to be connected to the electric power tool to supply the electric power to the electric power tool; and

a connection determination unit configured to determine whether or not the adapter is connected to the electric power tool,
wherein the charge unit is provided with a plurality of charge operation modes including a first charging mode and a second
charging mode,

wherein the first charging mode is performed when the connection determination unit determines that the adapter is not connected
to the electric power tool, and

wherein the second charging mode is performed when the connection determination unit determines that the adapter is connected
to the electric power tool.

US Pat. No. 9,427,860

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool which actuates a tool around a predetermined axis, comprising: a motor; a driving shaft which is driven by
the motor; and a driving transmission member which transmits a rotation output of the motor to the driving shaft, wherein
the driving transmission member includes (i) an eccentric moving member which moves eccentrically around a rotational shaft
of the motor, (ii) a first member to which a movement of the eccentric moving member is transmitted, (iii) a second member
which is a different and separate member from the first member, one side of the second member being fixed to the driving shaft
and the second member rotating together with the driving shaft around an axial direction of the driving shaft, and (iv) a
pivot portion which connects the first member and another side of the second member such that the second member rotates around
the axial direction of the driving shaft when the first member is moved by the movement of the eccentric moving member, wherein
the eccentric moving member includes an eccentric portion which is arranged to be offset to the center of the rotational shaft,
and two bearings which are arranged on a periphery of the eccentric portion, wherein the first member includes two arms which
face each other, each of the two arms contacts with respective peripheries of the two bearings simultaneously, and wherein
the two bearings are arranged in line in the axial direction of the rotational shaft.

US Pat. No. 9,160,125

BATTERY ADAPTER

MAKITA CORPORATION, Anjo...

1. A battery adapter, comprising a plurality of machine-side-connecting sections that can be connected to a plurality of battery-connecting
ports provided on an electric machine and also comprising a battery-side-connecting section that can be connected to a battery
such that the electric machine is drivable by the battery when the electric machine is connected to the machine-side-connecting
sections of the battery adapter via the battery-connecting ports of the electric machine and the battery is connected to the
battery-side-connecting section of the battery adapter, wherein;
each of the machine-side-connecting sections comprises a positive terminal and a negative terminal and the battery-side-connecting
section comprises a positive terminal and a negative terminal.

US Pat. No. 9,314,914

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a motor configured to drive a tool;
a rotating speed adjusting switch configured to be displaced by manipulation by a user;
a regulating member configured to regulate an upper limit position when the rotating speed adjusting switch is displaced to
an upper limit position of any one of a plurality of stages by the manipulation by the user; and

a control unit configured to control an amount of a current flowing to the motor by a duty ratio based on a manipulation amount
of the rotating speed adjusting switch, the control unit being configured to increase the rotating speed of the motor in accordance
with an increase in the manipulation amount, a predetermined set number of duty ratios being set for each of the plurality
of stages, and a proportion of the set number of duty ratios to a manipulable amount of the rotating speed adjusting switch
being higher in a first stage, where the upper limit position is the smallest, than in stages other than the first stage,
wherein

the control unit is further configured to control the duty ratio so that the rotating speed increases when the manipulation
amount of the rotating speed adjusting switch increases to the upper limit position at least in the first stage of the plurality
of stages, and to control the duty ratio, when the manipulation amount is reduced from the upper limit position to a predetermined
position, by a Hysteresis characteristic in which the rotating speed remains constant until the manipulation amount reaches
the predetermined position, the predetermined position excluding an initial position of the rotating speed adjusting switch.

US Pat. No. 9,325,191

CHARGER IN WHICH POWER CONSUMPTION IS REDUCED

MAKITA CORPORATION, Anjo...

1. A charger comprising:
a power source control circuit that controls charging of a battery that supplies electric power to an electric power tool;
a microcomputer that operates the power source control circuit; and
a constant voltage power source circuit that supplies electric power to the microcomputer and the power source control circuit,
wherein:

the constant voltage power source circuit is configured to control electric power supplied to the microcomputer by a pulse
width modulation control such that the voltage applied to the microcomputer becomes a predetermined voltage;

the microcomputer is configured to output in a time sequence, to the constant voltage power source circuit, a continuous signal
by which the constant voltage power source circuit continuously performs the pulse width modulation control, and an intermittent
signal by which the constant voltage power source circuit intermittently performs the pulse width modulation control such
that the constant voltage power source circuit controls the voltage applied to the microcomputer between a minimum voltage
that is required to drive the microcomputer and an operation voltage of the microcomputer;

the power source control circuit is configured to control charging when the power source control circuit receives a charging
permission signal from the microcomputer; and

the microcomputer is configured to output the continuous signal to the constant voltage power source circuit when the microcomputer
outputs the charging permission signal to the power source control circuit, and further wherein when the microcomputer stops
outputting the charging permission signal to the power source control circuit, the microcomputer is configured to output the
intermittent signal to the constant voltage power source circuit and also configured to stop electric power from the constant
voltage power source circuit to the power source control circuit.

US Pat. No. 9,314,916

POWER TOOL

MAKITA CORPORATION, Aich...

1. A power tool, comprising:
a hollow pole;
a prime mover disposed at one end of the hollow pole;
a tool disposed at a other end of the hollow pole;
a transmission shaft disposed within the hollow pole in a rotatable manner and configured to transmit torque from the prime
mover to the tool;

a joint mechanism configured to support the tool such that the tool is capable of rotating with respect to the hollow pole;
a lock mechanism configured to selectively lock and unlock the joint mechanism; and
a clutch mechanism disposed on a pathway of torque transmission from the prime mover to the tool via the transmission shaft,
and configured to selectively connect and disconnect the pathway of torque transmission, wherein

the lock mechanism and the clutch mechanism are coupled with each other such that when the lock mechanism unlocks the joint
mechanism the lock mechanism causes the clutch mechanism to disconnect the pathway of torque transmission.

US Pat. No. 9,250,861

RANDOM NUMBER GENERATING DEVICE

MAKITA CORPORATION, Anjo...

1. A random number generating device comprising:
a microcomputer;
a first oscillator circuit that has a predetermined temperature characteristic and is configured to generate a clock serving
as a basis of a behavior of the microcomputer; and

an electronic circuit that has a temperature characteristic being different from the predetermined temperature characteristic
of the first oscillator circuit and is configured to operate in accordance with a command from the microcomputer,

wherein the microcomputer is configured to measure an operating time of the electronic circuit based upon the clock generated
by the first oscillator circuit and to generate a random number based upon a result of the measurement, and

wherein the electronic circuit comprises a second oscillator circuit that is configured to exhibit a higher temperature dependence
than the first oscillator circuit.

US Pat. No. 9,205,502

RECIPROCATING SAW

MAKITA CORPORATION, Anjo...

1. A reciprocating saw, comprising:
a housing;
a motor accommodated in the housing;
a slider configured to be driven by the motor so that the slider reciprocates relative to the housing in a longitudinal direction,
the slider having a forward tip end protruding forward beyond the housing, the slider having a joining portion at the forward
tip end;

a blade fixedly retrained by the joining portion such that the blade reciprocates with the slider to cut a workpiece;
a protector made of an elastic material and extending about a periphery of the joining portion, the protector being rotatable
relative to the blade; and

a contact portion provided on the protector, the contact portion extending beyond the forward tip end of the slider in the
longitudinal direction and being rotatable with the protector between (i) a non-contact position relative to the blade and
(ii) a contact position configured to contact a surface of the blade fixedly retained by the joining portion.

US Pat. No. 9,181,913

STARTER FOR A POWER TOOL WITH IMPROVED KINEMATICS

MAKITA CORPORATION, Aich...

1. A starter for starting a combustion motor, with a rotating tension roller, onto which a tensioner can be wound and which,
via active connection, is connected to an entrainment of the combustion motor in order to introduce a rotating movement into
the combustion motor, wherein the active connection has at least one double crank gear between the tension roller and the
entrainment, wherein
the starter is configured to provide the active connection after considerably less than a full rotation of the tension roller.

US Pat. No. 9,321,163

IMPACT TOOL

MAKITA CORPORATION, Anjo...

1. An impact tool which is configured to perform a predetermined operation on a workpiece by striking movement of a tool bit
in an axial direction of the tool bit, comprising:
a motor,
a swinging member that is driven by the motor and swings in the axial direction of the tool bit,
a striking mechanism that is driven linearly in the axial direction of the tool bit by the swinging motion of the swinging
member,

a connecting part that connects the swinging member and the striking mechanism,
a housing member that houses at least the connecting part in an internal space,
a counter weight that is disposed within the internal space of the housing member and reduces vibration caused when the tool
bit is driven, and

an outer housing that is disposed outside the housing member and houses an entirety of the housing member,
wherein the counter weight has a close ring shape, and has a first annular part and a second annular part connected in a vertical
direction, the first annular part being located above the second annular part in the vertical direction,

the counter weight is rotatably supported by the housing member at a position above The first annular part in the vertical
direction, and

an entirety of the first annular part is the enclosed by the housing member.

US Pat. No. 9,276,509

POWER TOOL HAVING A BRUSHLESS MOTOR AND A CONTROL UNIT FOR CONTROLLING THE BRUSHLESS MOTOR

MAKITA CORPORATION, Anjo...

1. A power tool, comprising:
a brushless motor;
a battery voltage detection unit configured to detect a voltage of a battery that provides energy for driving the brushless
motor;

a rotational position detection unit configured to detect a rotational position of the brushless motor; and
a control unit configured to control a drive output supplied to the brushless motor based at least in part on a signal from
the rotational position detection unit;

wherein,
the control unit is configured to control a current conduction angle and/or an advance angle supplied to the brushless motor
such that, during control of the drive output to the brushless motor, a rotational speed or a conducting current of the brushless
motor reaches a target value based at least in part on a battery voltage detected by the battery voltage detection unit.

US Pat. No. 9,199,353

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool system comprising:
a driving shaft for driving each of a first tool bit and a second tool bit, the first tool bit having a circular hole and
a first group of holes, the first group of holes being arranged with equal spacing each other around an entire circular hole,
each of the first group of holes being located at a predetermined first position, the second tool bit having a second group
of holes, each of the second group of holes being located at a predetermined second position which is different from the first
position,

a first clamping element provided on the driving shaft, the first clamping element having i) a first engagement hole and ii)
a second engagement hole, the first engagement hole having a predetermined first distance from a center of the first clamping
element, the second engagement hole having a predetermined second distance from the center of the first clamping element,
the predetermined second distance being different from the predetermined first distance,

a second clamping element provided separately from the driving shaft, the first and second clamping elements are configured
to clamp the first tool bit therebetween, and

a third clamping element provided separately from the driven shaft, the first and third clamping elements are configured to
clamp the second tool bit therebetween,

wherein:
the second clamping element has a first protruding engagement part corresponding to the first group of holes and the first
engagement hole,

the third clamping element has a second protruding engagement part corresponding to the second group of holes and the second
engagement hole,

the first protruding engagement part and the second protruding engagement part are configured to engage with the first engagement
hole and the second engagement hole formed on the first clamping element, respectively, and

the first engagement hole and the second engagement hole are formed on a singular first clamping element.

US Pat. No. 9,198,347

WORK MACHINE HAVING OPERATION ROD

MAKITA CORPORATION, Aich...

1. A work machine, comprising:
an operation rod configured to be separated into at least a first partial rod and a second partial rod;
a front unit disposed at a front end of the operation rod and configured to attach a tool;
a rear unit disposed at a rear end of the operation rod and configured to attach a battery;
a handle provided on a middle portion of the operation rod;
a motor disposed in the front unit and configured to drive the tool;
at least one sensor disposed in the front unit and configured to detect a condition index of the motor;
a motor controller disposed in the rear unit, in order to reduce the size and weight of the front unit, and electrically coupled
with the battery;

at least one motor power line disposed along the operation rod and configured to transmit electric power outputted from the
motor controller to the motor;

at least one sensor signal line disposed along the operation rod and configured to transmit a signal outputted from the at
least one sensor to the motor controller; and

a pair of electric connectors including a first electric connector disposed on the first partial rod and a second electric
connector disposed on the second partial rod, the first and second electric connectors being configured to be electrically
connected to each other when the first and second partial rods are coupled with each other,

wherein the motor power line comprises a first partial motor power line disposed along the first partial rod and electrically
coupled with the first electric connector, and a second partial motor power line disposed along the second partial rod and
electrically coupled with the second electric connector,

the sensor signal line comprises a first partial sensor signal line disposed along the first partial rod and electrically
coupled with the first electric connector, and a second partial sensor signal line disposed along the second partial rod and
electrically coupled with the second electric connector,

the first electric connector comprises a plurality of first electric terminals, each of which is coupled with corresponding
one of the first partial motor power line or the first partial sensor signal line,

the second electric connector comprises a plurality of second electric terminals, each of which is coupled with corresponding
one of the second partial motor power line or the second partial sensor signal line, and

each of the plurality of first electric terminals is electrically connected to corresponding one of the plurality of second
electric terminals when the first and second partial rods are coupled with each other.

US Pat. No. 9,162,349

TORQUE LIMITER FOR A POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool which is adapted to actuate a tool being attachable to the power tool, comprising:
a motor; and
a torque limiter which is disposed between the motor and the tool, the torque limiter including a driving rotational member;
a driven rotational member including a rotational shaft, the driven rotational member to which a rotation of the driving rotational
member is transmitted; and a plurality of roll members which is disposed between the driving rotational member and the driven
rotational member,

wherein the torque limiter is adapted to regulate a transmission of the rotation from the driving rotational member to the
driven rotational member in a state that a torque exerted on the rotational shaft exceeds the predetermined threshold,

wherein each roll member is movable between a first region where the roll member is located to transmit the rotation to the
driven rotational member and a second region where the roll member is located to regulate the transmission of the rotation
to the driven rotational member,

wherein the roll member transmits the rotation to the driven rotational member in a state that the roll member is located
at the first region by rotating integrally with the driving rotational member and the driven rotational member in a circumferential
direction of the rotational shaft,

wherein in a state that the torque exerted on the rotational shaft exceeds the predetermined threshold, the driving rotational
member and the driven rotational member cause a relative rotation between the driving rotational member and the driven rotational
member, and the roll member is moved from the first region to the second region while rolling caused by the relative rotation,

wherein the transmission of the rotation to the driven rotational member is regulated in a state that the roll member is located
at the second region,

wherein the torque limiter includes a biasing member which biases the driving rotational member and the driven rotational
member to be close to each other,

wherein the driving rotational member includes a first groove, a second groove which is deeper than the first groove and a
driving incline groove which includes an incline surface inclining against a rotating surface of the driving rotational member,
the first groove, the second groove and the driving incline groove being respectively contactable with the roll member, and
wherein the first groove and the second groove are connected via the driving incline groove such that the first groove, the
second groove and the driving incline groove are disposed in a continuous manner in a circumferential direction of the driving
rotational member,

wherein the driven rotational member includes a third groove corresponding to the first groove, a fourth groove corresponding
to the second groove and being deeper than the third groove and a driven incline groove which includes an incline surface
inclining against a rotating surface of the driven rotational member, the third groove, the fourth groove and the driven incline
groove being respectively contactable with the roll member, and wherein the third groove and the fourth groove are connected
via the driven incline groove such that the third groove, the fourth groove and the driven incline groove are disposed in
a continuous manner in a circumferential direction of the driven rotational member,

wherein a first part defined by a predetermined part of the driving incline groove and a second part defined by a predetermined
part of the driven incline groove provide the first region, and

wherein the first groove, the second groove, a part except the first part of the driving incline groove and the third groove,
the fourth groove, a part except the second part of the driven incline groove provide the second region.

US Pat. No. 9,553,466

ELECTRIC POWER TOOL SYSTEM

MAKITA CORPORATION, Anjo...

1. An electric power tool system comprising:
a tool main body;
a battery pack detachably attached to the tool main body and comprising at least one rechargeable battery; and
a first charger configured to charge the battery pack, wherein the first charger comprises a first housing containing at least
one rechargeable battery configured to supply charging current that charges the at least one rechargeable battery of the battery
pack,

wherein the first charger is configured to charge the battery pack while the battery pack is attached to the tool main body,
wherein the at least one rechargeable battery of the first charger has a charge storage capacity that is larger than the charge
storage capacity of the at least one rechargeable battery of the battery pack, and

further comprising a second charger configured to charge the at least one rechargeable battery of the first charger, the second
charger comprising a second housing containing a charging controller, the first housing being removably mountable on the second
housing to charge the at least one rechargeable battery of the first charger.

US Pat. No. 9,302,363

DUST COLLECTING DEVICE AND IMPACT TOOL

MAKITA CORPORATION, Anjo...

7. An impact tool comprising:
a tool body; and
a dust collecting device that collects dust generated in which a tool bit coupled to a front end region of the tool body is
caused to rectilinearly move in an axial direction of the tool bit, the dust collecting device includes:

a dust collecting part having a dust suction port at a front end of the dust collecting device, the dust suction port having
a non-uniform contour shape around an axis of the tool bit; and

a dust collecting hose which is connected to the dust collecting part and through which dust is transferred downstream, wherein
an external frontmost end of the dust collecting part defines an opening and is inclined such that the frontmost end extends
toward a rear of the tool bit on one side thereof having a connecting part connected with the dust collecting hose, while
extending toward a front of the tool bit on an opposite side from the connecting part side with respect to the tool bit.

US Pat. No. 9,156,152

IMPACT TOOL HAVING COUNTER WEIGHT THAT REDUCES VIBRATION

MAKITA CORPORATION, Anjo...

1. An impact tool which is configured to perform a predetermined operation on a workpiece by axial striking movement of a
tool bit coupled to a front end region of a tool body, comprising:
a motor that is housed in the tool body,
a drive shaft that is disposed in parallel to an axial direction of the tool bit and rotationally driven by the motor,
a ring-like member that is rotatably mounted onto the drive shaft and caused to swing in the axial direction of the tool bit
by rotation of the drive shaft,

a tool driving mechanism that is connected to one end region of the ring-like member in a direction transverse to the axial
direction of the tool bit and is caused to rectilinearly move in the axial direction of the tool bit by swinging movement
of the ring-like member and thereby rectilinearly drives the tool bit, and

a counter weight that is mounted movably in the axial direction of the tool bit and reduces vibration which is caused in the
tool body in the axial direction of the tool bit during operation, wherein:

the counter weight has a connecting part, and the counter weight is connected to the ring-like member via the connecting part,
and

the connecting part is formed in the counter weight and comprises a protrusion that comes in contact with an outer edge of
the ring-like member in both axial directions of the tool bit.

US Pat. No. 9,132,572

ELECTRIC TOOL WITH DUST COLLECTOR

MAKITA CORPORATION, Anjo...

1. An electric tool with a dust collector, wherein the dust collector is in sliding engagement with a housing at a predetermined
position, comprising:
an engaging portion provided on one of the housing and the dust collector, engageable and disengageable with an engaged portion
provided on the other of the housing and the dust collector at an engagement position of the dust collector, and biased in
a direction of engagement with the engaged portion, with the dust collector fixed by engaging the engaging portion with the
engaged portion; and

a second engaged portion provided on the other of the housing and the dust collector, and engageable with the engaging portion
at at least one slide position of the dust collector in front of the engagement position,

wherein the dust collector is fixed to the housing even at the slide position by engaging the engaging portion with the second
engaged portion, and

wherein the engaging portion is engaged with the engaged portion and not the second engaged portion in the engagement position,
and the engaging portion is engaged with the second engaged portion and not the engaged portion in the slide position.

US Pat. No. 9,505,118

STRIKING TOOL

MAKITA CORPORATION, Anjo...

1. An impact tool which linearly drives a tool bit in an axial direction of the tool bit to cause the tool bit to perform
a predetermined hammering operation, comprising:
a motor,
a striking mechanism part that is driven by the motor and causes the tool bit to linearly move,
a tool body that houses the motor and the striking mechanism part,
an outer shell housing that covers at least part of the tool body,
a first elastic element that elastically connects the outer shell housing to the tool body such that the outer shell housing
can move in a direction transverse to the axial direction of the tool bit with respect to the tool body,

a handle designed to be held by a user,
a second elastic element that connects the handle to the outer shell housing such that the handle can move in the axial direction
of the tool bit with respect to the tool body,

wherein the tool body has a barrel extending in the axial direction of the tool bit, the first elastic element is interveningly
disposed between an outer circumferential surface of the barrel and an inner circumferential surface of the outer shell housing
which covers the barrel, and the first elastic element positions the outer shell housing in a radial direction with respect
to the tool body, and

wherein the striking mechanism comprises a motion converting element and a striking element, the striking element is at least
partly housed by the barrel of the tool body,

a plurality of third elastic elements that can elastically deform in the direction transverse to the axial direction of the
tool bit, and

a rod-like member which is provided in the tool body and slidably extends through the tool body in the axial direction of
the tool bit, wherein:

the outer shell housing is connected to the tool body via at least the plurality of third elastic elements and the second
elastic element,

the rod-like member serves as a guide rail for guiding movement of the outer shell housing in the axial direction of the tool
bit with respect to the tool body,

the rod-like member extends in the axial direction of the tool bit and an elastic element of the plurality of third elastic
elements is mounted to each end of the rod-like member, and

the tool body comprises a first hole that is disposed close to the tool bit and a second hole that is disposed remote from
the tool bit in the axial direction of the tool bit, and the rod-like member is provided to penetrate the first and second
holes.

US Pat. No. 9,444,307

VARIABLE SPEED SWITCH AND ELECTRIC POWER TOOL WITH THE VARIABLE SPEED SWITCH MOUNTED THERETO

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:
an electric motor;
a housing;
a switch operating portion;
a variable speed switch that outputs an electric signal for increasing or decreasing the amount of electric power supplied
to the motor in proportion to a displacement amount of the switch operating portion; and

a control circuit that inputs the electric signal and adjusts the electric power supplied to the motor; wherein:
the variable speed switch further comprises:
a switch main body portion accommodated in the housing and mounted to the housing such that the switch main body portion is
not relatively moved with respect to the housing; and

a load sensor connected to the switch main body portion and capable of outputting an electric signal in proportion to the
amount of distortion caused by a pressing force, and

the switch operating portion is configured to cover an opening provided in the housing and be mounted on a surface of the
housing so as to be capable of relative displacement with respect to the housing and transmits the pressing force applied
to the switch operating portion to the load sensor, with the maximum amount of the relative displacement of the switch operating
portion being set to equal to or less than 5 mm, and

the switch operating portion is formed of an elastic material and waterproofly seals the opening.

US Pat. No. 9,372,666

RANDOM NUMBER GENERATING DEVICE

MAKITA CORPORATION, Anjo...

1. A random number generating device comprising:
a processor configured to act as:
a processing request part configured to make a request for a predetermined processing to a processing requested object;
a receiving part configured to receive a response from the processing requested object in response to the request;
a counting part configured to perform a counting operation to increase or decrease a count value with a predetermined cycle,
the counting operation being started at least prior to receipt of the response; and

a random number generation part configured to acquire at least one count value of the counting part at least one predetermined
acquisition timing after the receipt of the response is started, and to generate a random number by using the at least one
count value that is acquired.

US Pat. No. 9,303,611

STARTING DEVICE FOR AN INTERNAL COMBUSTION ENGINE

MAKITA CORPORATION, Anjo...

1. A starting device for an internal combustion engine comprising:
a pulley mounted rotatably in a housing;
a tensioning member configured to rotate the pulley in response to a force introduced via a starter handle, the pulley being
configured to produce a drive torque for a motor shaft;

an engaging member coupled with the pulley by a damping spring formed from a spring wire, the damping spring being configured
to transmit the drive torque to the motor shaft to start the internal combustion engine;

a stop element arranged on the engaging member; and
a counter-stop arranged on the pulley, wherein
under torsion of the damping spring, the pulley is rotatable relative to the engaging member until the stop element impacts
against the counter-stop,

the stop element and/or the counter-stop is formed from a material which has a higher strength than a material of the engaging
member and/or a material of the pulley, and

the stop element is made of a metal material, and the engaging member and/or the pulley is formed from a plastic material,
the counter-stop is configured as an insert element made of a high-strength material, and is inserted in the pulley, and
the counter-stop is statically coupled relative to the pulley.

US Pat. No. 9,287,751

ELECTRIC CUTTING OR DRILLING TOOLS THAT USE BATTERY PACKS AS POWER SOURCES

MAKITA CORPORATION, Anjo...

1. An electric tool comprising:
a tool main body configured to be able to mount a battery pack, the tool main body including:
an electric motor configured to rotate with a supply of an electric power from the battery pack;
a centrifugal fan rotatably driven by the electric motor for producing a flow of air;
a controller configured to control the electric motor with respect to a rotational drive of the electric motor; and
a cutting blade rotatably driven by the electric motor, the cutting blade extending parallel to the radial direction of the
centrifugal fan,

wherein the controller is disposed within the tool main body such that at least a part of a surface of the controller is positioned
on a radially outer side of the centrifugal fan,

wherein the surface of the controller includes a longer side surface and a shorter side surface, the longer side surface is
positioned on a radially outer side of the centrifugal fan, and the longer side surface ends in a vertical direction in parallel
to a rotational axis of the centrifugal fan,

wherein the longer side surface includes two opposite longer side surfaces and the shorter side surface includes four or more
shorter side surfaces connecting between the opposite longer side surfaces, and one of the opposite longer side surfaces directly
opposes the centrifugal fan on the radially outer side, and

wherein the at least a part of the controller is positioned on a rear side of the centrifugal fan with respect to a machining
proceeding direction so as to directly oppose the centrifugal fan on the radially outer side.

US Pat. No. 9,186,787

INTERNAL TEMPERATURE ESTIMATION UNIT FOR BATTERY FOR ELECTRIC POWER TOOL, AND APPARATUS FOR ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An internal temperature estimation unit for battery for electric power tool, which is provided in an apparatus for electric
power tool and is configured to read a detected temperature from a temperature detection device that is configured to detect
a temperature of a cell of a battery that is a power source of an electric power tool so as to estimate an internal temperature
of the battery based on the detected temperature, the unit comprising:
an initial-value setting device which is configured to read, when a discharge from the battery is started, the detected temperature
from the temperature detection device and to set the detected temperature as an initial value; and

a temperature increase amount calculation device which is configured to read, during the discharge from the battery, the detected
temperature from the temperature detection device and to calculate a temperature increase amount of the cell of the battery
based on a latest value of the read detected temperature and the initial value set by the initial-value setting device, and

wherein the internal temperature estimation unit is configured to output the temperature increase amount calculated by the
temperature increase amount calculation device, as an estimated value representing the internal temperature of the battery.

US Pat. No. 9,412,982

BATTERY PACK FOR ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. A battery pack for an electric power tool that is detachably mounted on a tool body of the electric power tool for serving
as a power source for the electric power tool, the battery pack comprising:
a case;
battery cells; and
a cell holder that is inserted into the case, the cell holder covering at least a part of the battery cells, wherein
a dimensional difference interposition member serves to bridges a dimensional difference between the cell holder and the inside
of the case by generating a pressing force applied to the case when the cell holder is inserted;

the dimensional difference interposition member being molded integrally with the cell holder; and
the dimensional difference interposition member is formed as a cutout in the cell holder, and serves to bridge the dimensional
difference by the elasticity thereof when the cell holder is completely inserted into the case.

US Pat. No. 9,387,577

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a prime mover that is capable of driving a tool bit, and
a planetary gear speed reducing mechanism that transmits torque of the prime mover, wherein:
the planetary gear speed reducing mechanism includes a driving member which is rotationally driven by the prime mover, a driven
member which is rotatably and coaxially disposed with the driving member and to which the tool bit is capable of being coupled,
and an intervening member that is disposed between the driving member and the driven member,

the intervening member has a contact surface in contact with the driving member and the intervening member is configured as
a planetary member and at least caused to rotate by frictional force acting on the contact surface in contact with the driving
member when the driving member is rotationally driven, so that torque of the driving member is transmitted to the driven member
at reduced speed,

a tapered surface of at least one of the driving member or the driven member is inclined with respect to a rotation axis of
the driving member, the intervening member is held in frictional contact with the tapered surface, and a pressing force is
applied between the intervening member and the tapered surface under loaded conditions,

under unloaded conditions, a predetermined preload is constantly applied between the intervening member and the tapered surface,
and

when the driving member and the driven member are rotationally driven, in addition to the predetermined preload, a pressing
force is further applied between the intervening member and the tapered surface.

US Pat. No. 9,381,584

CORDLESS ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. A cordless electric power tool comprising:
a three-phase brushless motor that drives a tool, the motor including a U-phase terminal, a V-phase terminal, and a W-phase
terminal;

a battery that supplies electric power to the motor;
a motor drive circuit that includes a first switching device, a second switching device, and a third switching device, the
U-phase terminal of the motor being electrically connected with the battery via the first switching device, the V-phase terminal
of the motor being electrically connected with the battery via the second switching device, the W-phase terminal of the motor
being electrically connected with the battery via the third switching device, and the first switching device, the second switching
device, and the third switching device being connected in parallel with each other;

a cut-off switch that includes a semiconductor switch disposed between the battery and the motor drive circuit, the semiconductor
switch being electrically connected in series with each of the first switching device, the second switching device, and the
third switching device; and

a pull-up resister that is electrically connected to a node between the cut-off switch and the motor drive circuit and is
configured to apply a predetermined voltage to the node, wherein

the battery has a nominal voltage that is no more than 24 volts, and
an overall electric efficiency of the cordless electric power tool becomes at least 70 percent when the cordless electric
power tool outputs power of at least 450 watts but no more than 550 watts.

US Pat. No. 9,364,906

POWER TOOL WITH HIGH-SPEED ELECTRIC MOTOR

MAKITA CORPORATION, Anjo...

1. A hand-held power tool comprising:
a motor having a stator and a rotor, the motor being configured to rotate the rotor at a rotational speed of at least 40,000
rpm, and

a speed-reducing transmission operably coupled to the rotor, the speed-reducing transmission comprising a first stage and
a second stage, wherein the first stage has a gear ratio that is greater than a gear ratio of the second stage,

wherein the speed-reducing transmission is configured to drive a tool accessory at a rotational speed within the range of
1,000-15,000 revolutions per minute.

US Pat. No. 9,356,464

BATTERY PACK AND BATTERY CHARGER THAT CHARGES BASED ON TEMPERATURE

MAKITA CORPORATION, Anjo...

1. A battery pack comprising:
a connecting portion that is connected to a battery charger;
a battery that is allowed to be charged by the battery charger connected to the connecting portion;
a battery temperature detecting element that detects a temperature of the battery;
an environment temperature detecting element, which is separate from the battery temperature detecting element, that detects
an environment temperature around the battery; and

a control circuit that is adapted to periodically detect the environment temperature via the environment temperature detecting
element and to control the battery charger to suspend starting of charging the battery or to temporarily discontinue charging
the battery when a variation of the environment temperature detected exceeds a predetermined range, when the battery charger
is connected to the connecting portion.

US Pat. No. 9,278,444

HANDHELD WORK MACHINE

MAKITA CORPORATION, Aich...

1. A handheld work machine, comprising:
a main body comprising a prime mover; and
a handle fixed to the main body and configured to be gripped by a force, the handle is a pipe, and at least one reinforcement
member is disposed at a longitudinal portion of the handle that defines a part of the handle, wherein

the at least one reinforcement member is a pipe,
at least one mounting portion of the handle is defined by the part of the handle at which the at least one reinforcement member
is disposed,

the at least one mounting portion includes at least one bolt hole passing through both the at least one reinforcement member
and the handle,

the at least one bolt hole defines a recess provided in both the at least one reinforcement member and the handle,
the handle includes curved portions,
at least one curved portion includes the at least one reinforcement member, and
the at least one reinforcement member in the at least one curved portion is curved in the same manner as the at least one
curved portion.

US Pat. No. 9,050,715

BATTERY PACK OF ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

5. An electric power tool system comprising:
a first electric power tool powered by a first battery pack, the first battery pack comprising at least one lithium-ion cell,
wherein the lithium-ion cell has a diameter equal to or less than 18 millimeters, a length equal to or less than 45 millimeters,
and an internal resistance equal to or less than 40 milliohms; and

a second electric power tool powered by a second battery pack;
wherein the first battery pack and the second battery pack comprise the same number of lithium-ion cells,
the internal resistance of the lithium-ion cell of the first battery pack is lower than an internal resistance of the lithium-ion
cell of the second battery pack,

the first battery pack is configured capable of being detachably attached to a main body of the first electric power tool
but is configured incapable of being attached to a main body of the second electric power tool, and

the second battery pack is configured capable of being detachably attached to the main body of the second electric power tool
and is configured capable of being attached to the main body of the first electric power tool.

US Pat. No. 9,941,824

ELECTRIC WORKING MACHINE AND METHOD FOR DETECTING ROTATIONAL POSITION OF ROTOR OF BRUSHLESS MOTOR FOR ELECTRIC WORKING MACHINE

MAKITA CORPORATION, Anjo...

1. An electric working machine comprising:a brushless motor comprising a rotor and a stator having a plurality of windings;
a rotational position sensor configured to detect a rotational position of the rotor based on a variation in a magnetic field associated with rotation of the rotor;
a detector configured to detect the rotational position of the rotor based on induced voltages individually generated in each of the plurality of windings; and
a calculator configured to (i) detect a difference between (a) a detection result obtained by the rotational position sensor when the brushless motor is inertially rotated, and (b) a detection result obtained by the detector and (ii) to calculate a correction value, based on the difference, for correcting the detection result obtained by the rotational position sensor.

US Pat. No. 9,101,094

ELECTRICALLY POWERED GARDEN TOOL

MAKITA CORPORATION, Aich...

1. An electrically powered garden tool, comprising:
an electric motor having a drive shaft and mounted upright within an outer shell housing,
a pair of relatively reciprocating shear blades assembled to be driven by operation of said motor through a crank mechanism
provided within a lower portion of said outer shell housing,

and a cooling fan assembled to be driven by operation of said motor for introducing outside air into an upper portion of said
outer shell housing and for exhausting the introduced air from said lower portion of said outer shell housing,

wherein a downward exhaust opening is formed within a lower end of a peripheral wall of said outer shell housing enclosing
the crank mechanism,

wherein the downward exhaust opening is opened in a downward direction and is devoid of any obstacle such that the air, spouted
by rotation of said cooling fan, blows out in the downward direction from the downward exhaust opening, wherein the downward
direction extends in a direction of a central axis of said outer shell housing that extends from said upper portion of said
outer shell housing to said lower portion of said outer shell housing,

said lower end of said peripheral wall of said outer shell housing extending such that exhausted air is blown out from the
downward exhaust opening without being obstructed by any parts of the garden tool in a direction generally parallel to a longitudinal
axis of said drive shaft of said motor, and wherein

a noise absorption element is attached to an inner surface of said peripheral wall of said outer shell housing.

US Pat. No. 9,325,265

MOTOR-DRIVEN APPLIANCE AND BATTERY PACK

MAKITA CORPORATION, Anjo...

1. A motor-driven appliance comprising:
a battery;
a battery pack having at least the battery housed therein;
a motor that includes permanent magnets as field magnets and is operated by electric power from the battery;
a momentary maximum current upper limit storage unit in which a predetermined momentary maximum current upper limit is stored;
a main body to which the battery pack is detachably attached and which has at least the motor and the momentary maximum current
upper limit storage unit mounted therein;

a current detection unit that detects a current flowing in the motor;
a current threshold setting unit that generates a current threshold based on the momentary maximum current upper limit stored
in the momentary maximum current upper limit storage unit, and outputs the generated current threshold;

a current exceedance determination unit that determines whether the current detected by the current detection unit has become
equal to or greater than the current threshold, and outputs an interruption signal used to interrupt a current path from the
battery to the motor when the detected current has become equal to or greater than the current threshold; and

a current flow interruption unit that interrupts the current path when the interruption signal is outputted from the current
exceedance determination unit.

US Pat. No. 9,257,855

CHARGER

MAKITA CORPORATION, Anjo...

1. A charger comprising:
a connecting portion configured to connect a battery;
two protection devices configured to switch between inhibition and permission of charging the battery;
a charging device configured to stop charging the battery in a case where at least one of the two protection devices is in
a charging inhibited state, in which charging the battery is inhibited, and to perform charging the battery in a case where
both of the two protection devices are in a charging permitted state, in which charging the battery is permitted;

a control device configured to, when the battery is connected to the connecting portion, bring the two protection devices
into the charging permitted state to thereby permit charging the battery by the charging device; and

a voltage detection device configured to detect a voltage value of a charging path from the charging device to the connecting
portion,

wherein a first protection device, which is one of the two protection devices, is configured such that its power consumption
in the charging inhibited state is lower than its power consumption in the charging permitted state,

a second protection device, which is the other of the two protection devices, is configured such that its power consumption
in the charging permitted state is lower than its power consumption in the charging inhibited state, and

the control device is configured to respectively set, when the battery is not connected to the connecting portion, the first
protection device to the charging inhibited state and the second protection device to the charging permitted state, and thereafter
switch, when the voltage value of the charging path detected by the voltage detection device is equal to or greater than a
predetermined specified voltage value, the second protection device to the charging inhibited state.

US Pat. No. 9,425,634

CHARGING APPARATUS FOR SECONDARY BATTERY

TAMURA CORPORATION, Toky...

1. A charging apparatus for a secondary battery, comprising:
a power supply circuit connected to a primary winding of a transformer;
a main winding and a sub winding connected to a secondary side of the transformer;
a charging circuit connected to the main winding, the charging circuit supplying power to a battery pack to be charged; and
a control circuit connected to the sub winding, the control circuit controlling the charging circuit,
wherein the charging circuit comprises a LED indicating a standby state or a charge completion state, the LED being lighted
at a light-load time of the charging circuit based on a command of the control circuit,

wherein the LED is connected to the charging circuit via a constant voltage circuit connected in series with the LED, and
wherein the charging circuit comprises a resistor connected to a connection point of the LED and the constant voltage circuit
at one end and connected to the control circuit at the other end.

US Pat. No. 9,108,284

DUST COLLECTION DEVICE FOR POWER TOOL AND POWER TOOL

MAKITA CORPORATION, Anjo...

1. A dust collection device for a power tool, comprising:
a casing from which a suction port protrudes and which can be attached to a power tool;
a dust collection pathway which is formed in the casing, and through which air sucked from the suction port passes; and
a dust box detachably joined to a joining section provided in the casing having a filter arranged therein, being provided
with an inlet on an upstream side of the filter and an outlet on a downstream side of the filter, and serving as part of the
dust collection pathway, wherein

the filter is provided at a position at which the filter covers the outlet provided on an inner wall face of the dust box,
in a state such that a filter surface projects into the dust box, and a space is formed between a side face of the filter
adjacent to the filter surface and an inner face of the dust box, the filter surface facing the side face of the filter; and

a guide unit is provided to guides air, which flows in through the inlet that is disposed at a side where an upper side of
the filter surface is located, to the space, to a bottom side of the filter surface, to inside the filter, and to the outlet.

US Pat. No. 9,091,239

ENGINE HAVING DISPLACEABLE ELASTIC FILM

MAKITA CORPORATION, Aich...

1. An engine, comprising:
a piston;
a carburetor;
an elastic film;
a first chamber formed in one side of the elastic film;
a second chamber formed in the other side of the elastic film; and
a diaphragm fuel pump provided in the carburetor, the diaphragm fuel pump including:
a pump chamber configured to suck and discharge fuel; and
a diaphragm chamber to which a pressure to drive the pump chamber is applied,
wherein:
the first chamber communicates with a pressure fluctuation part in which there is pressure fluctuation due to movement of
the piston;

the pressure fluctuation part being a crank chamber;
the second chamber communicates with the diaphragm chamber; and
the elastic film is displaced with the pressure fluctuation in the crank chamber to communicate the pressure fluctuation to
the diaphragm chamber via fluid or air in the second chamber.

US Pat. No. 9,114,521

ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool configured such that a motor used as a drive source is housed in a dual-separated type housing,
comprising:
a bearing support member that covers an outer circumferential surface of a bearing of the motor and supports the bearing from
outside in the radial direction;

wherein the bearing and one end of the bearing support member in the axial direction are at least partially inserted in a
tool component disposed coaxially;

wherein a protruding portion that is the other end of the bearing support member and axially protrudes from the tool component
is supported by receiving portions of a pair of housing parts;

wherein a baffle for the housing is formed at the protruding portion of the bearing support member and the baffle extends
from the bearing support member; and

wherein an axial length of the protruding portion of the bearing support member is smaller than that of the bearing of the
motor.

US Pat. No. 9,193,021

POWER TOOL DUST COLLECTING DEVICE AND POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool dust collecting device comprising:
a housing in which a suction opening is protrudingly provided and on which a power tool is mountable;
a motor chamber which is provided in the housing and which holds a motor having a brush that comes into sliding contact with
a commutator of a rotor that rotates integrally with an output shaft;

a fan chamber which is provided in the housing and which houses a dust collecting fan attached to the output shaft of the
motor;

a dust collecting chamber which is provided in the housing and in which a filter, through which passes air sucked up from
the suction opening due to rotation of the dust collecting fan in accordance with driving of the motor and which collects
dust in the air, is mounted on an upstream side of the fan chamber;

a first pair of protruding portions protruding inwardly from a left inner wall of the motor chamber and protruding toward
an outer peripheral surface of the motor from positions separated from each other in a transverse direction relative to a
longitudinal axis of the motor;

a second pair of protruding portions protruding inwardly from a right inner wall of the motor chamber and protruding toward
the outer peripheral surface of the motor from positions separated from each other in the transverse direction, the first
pair of protruding portions and the second pair of protruding portions facing one another from opposite sides of the motor
and sandwiching the motor; and

a plurality of cushioning members, each cushioning member being interposed between one of the protruding portions and the
outer peripheral surface of the motor.

US Pat. No. 9,350,000

BATTERY PACK

MAKITA CORPORATION, Anjo...

1. A battery pack configured to be mounted on a tool body of an electric tool as a power source of the electric tool, the
battery pack comprising:
a housing case configured as an outer cover, the housing case including:
a side wall portion having an upper end and a lower end,
a bottom wall portion having an outer circumferential edge, and
a joint portion connecting the lower end of the side wall portion and the outer circumferential edge of the bottom wall portion;
a plurality of battery cells disposed in the housing case, and
a water drain hole provided to the housing case, the water drain hole having an inner end edge and an outer end edge, the
inner end edge communicating with an internal space defined in the housing case, and the outer end edge being opened to an
outside of the housing case;

wherein the outer end edge is located at the joint portion, and at least a part of the outer end edge is opened to the outside
in a horizontal direction parallel to an extending direction of the bottom wall portion.

US Pat. No. 9,368,765

BATTERY PACK

MAKITA CORPORATION, Anjo...

1. A battery pack that is configured to be capable of slidably moving on a tool body of an electric power tool served as a
power source of the electric power tool and that includes battery-side connection terminals to which body-side connection
terminals of the tool body are connected by a relative slide movement when the battery pack slides to be mounted, wherein:
a housing case that forms an exterior of the battery pack is provided with terminal-connection openings that extend in a slide
direction of slide mounting with the inside and outside of the housing case communicating with each other, such that the body-side
connection terminals can be connected to the battery-side connection terminals,

the terminal-connection openings are provided with foreign-material entry-regulating members having elasticity by themselves
that can close openings of the terminal-connection openings when the battery pack is placed alone without being mounted on
the tool body,

the foreign-material entry-regulating members serve not to interfere with the connection when the body-side connection terminals
are connected to the battery-side connection terminals,

the foreign-material entry-regulating members include door portions door portions that can open and close the openings of
the terminal-connection openings and also include biasing portions that can close the openings of the terminal-connection
openings with the door portions by biasing the door portions in a closing direction,

when the body-side connection terminals are connected to battery-side connection terminals, the door portions are opened against
biasing forces of the biasing portions according to the slide movement of the body-side connection terminals that come into
contact with the door portions of the foreign-material entry-regulating members and slidably move such that the body-side
connection terminals can be inserted into the foreign-material entry-regulating members,

when the battery pack is placed alone without being mounted on the tool body, the door portions are closed by the biasing
forces of the biasing portions of the foreign-material entry-regulating members so as to close the openings of the terminal-connection
openings, and

the door portions are integrally formed with the biasing portions as a one piece unitary structure.

US Pat. No. 9,364,944

POWER TOOL

MAKITA CORPORATION, Anjo...

13. A hand-held power tool, which performs a predetermined operation by rotationally driving a tool bit, comprising:
a tool body,
a tool holder that holds the tool bit,
a motor that is housed in the tool body and rotationally drives the tool bit,
an intermediate shaft which is disposed between the tool holder and the motor, the intermediate shaft being driven by the
motor and transmitting torque to the tool holder,

a first sensor that detects torque applied on the intermediate shaft,
a second sensor that detects motion of the tool body,
a torque transmission interrupting mechanism that can interrupt torque transmission between the motor and the tool bit, and
a mechanical limiter that is disposed on the intermediate shaft and is capable of interrupting the torque transmission between
the motor and the tool bit,

wherein the torque transmission interrupting mechanism interrupts torque transmission, when both the torque detected by the
first sensor and the motion of the tool body detected by the second sensor reach respective preset threshold,

the torque transmission between the motor and the tool bit is maintained when at least one of the torque detected by the first
sensor and the motion of the tool body detected by the second sensor does not reach corresponding preset threshold, and

the mechanical limiter interrupts the torque transmission between the motor and the tool bit when the torque detected by the
first sensor reaches a preset another threshold, which is greater than the preset threshold, the mechanical limiter interrupting
the torque transmission independently from a detection result of the second sensor.

US Pat. No. 9,289,873

ABRASIVE CUTTING MACHINE

MAKITA CORPORATION, Aich...

1. An abrasive cutting machine, comprising:
an engine;
a cutting tool with a driven axis of rotation;
a cutting arm having the cutting tool provided on a distal end thereof,
a cover connected to the cutting arm,
a housing comprising a first side housing and a second side housing laterally separated in a direction parallel to the driven
axis of rotation;

the first side housing comprising an enclosed fan chamber;
a fan wheel provided within the enclosed fan chamber to generate an air flow;
the second side housing comprising a substantially closed belt chamber, the belt chamber being delimited by the cutting arm
and cover; and

the cutting arm having a belt pulley provided on a proximal end thereof, the cutting tool being driven via a belt connected
to the engine via the belt pulley, an air duct connecting the enclosed fan chamber to the substantially closed belt chamber
to provide a path for the air flow generated by the fan wheel to create and maintain an overpressure inside the belt chamber
to cool the belt and prevent permeation of dust and other impurities into the belt chamber.

US Pat. No. 9,160,261

VARIABLE SPEED SWITCH

MAKITA CORPORATION, Anjo...

1. A variable speed switch mounted to an electric power tool and capable of outputting an electric signal for increasing or
decreasing an amount of electric power supplied to a motor of the electric power tool according to a displacement amount of
a switch-operating portion, comprising:
a wake-up contact configured to work when the switch-operating portion is operated and by which a voltage can be applied to
a control circuit part of the motor to make the control circuit part in an operable state;

a pressing member that is attached to the switch-operating portion via an elastic member; and
a load sensor that is configured to receive a pressing force from the pressing member and to output the electric signal for
increasing or decreasing the amount of electric power supplied to the motor of the electric power tool,

wherein the pressing member is spaced apart from the load sensor before the wake-up contact works.

US Pat. No. 9,254,562

POWER TOOL

Makita Corporation, Anjo...

1. A power tool switchable among driving modes different in driving state of a tool bit, comprising:
a mode switching member that switches between the driving modes, wherein the mode switching member comprises a dial that is
manually turned,

a detecting part that detects whether the mode switching member has been placed in any one of the driving modes or has been
placed at a position between the driving modes,

a motor that drives the tool bit, wherein
the detecting part comprising:
a cam plate that is operated in conjunction with a turning movement of the dial and that is formed with a disk-like shape,
the cam plate comprises regions for detecting the driving modes and regions for detecting a drive prohibited state, the regions
for detecting the driving modes comprises recesses and each of the recesses corresponds to a designated driving mode of the
driving modes, and the regions for detecting the drive prohibited state comprises a smooth outer circumferential surface of
the cam plate between the recesses,

a swinging lever with a protrusion, and
a switch that is either turned off to allow driving of the motor or turned on to prevent driving of the motor in the drive
prohibited state,

when the cam plate is turned by the dial such that the protrusion of the swinging lever is in one of the recesses, the swinging
lever is not in contact with the switch in order to turn off the switch to allow driving of the motor, and

when the cam plate is turned by the dial such that the protrusion of the swinging lever is not in one of the recesses but
is instead in contact with the smooth outer circumferential surface, the swinging lever is in contact with the switch in order
to turn on the switch to detect the drive prohibited state to prevent driving of the motor, and

an indicating part that indicates a result detected by the detecting part.

US Pat. No. 9,227,291

ANGLE GRINDER

MAKITA CORPORATION, Aich...

1. An angle grinder comprising:
a cutting arm, on which a tool is mounted in a rotating manner about an axis; and
a guide element arranged on the axis such that a cutting depth with which the tool cuts into a workpiece during operation
is limited, wherein

a protective hood is arranged on the cutting arm,
a gap is provided between the tool and the guide element in the axial direction,
the guide element is mounted on the axis inside the protective hood,
the guide element has a diameter that is determined in such a way that the guide element radially projects from the cutting
arm in relation to the axis,

the guide element has an angle segment with which the guide element projects from the protective hood, and
the angle segment is the same angle segment with which the tool projects from the protective hood.

US Pat. No. 9,205,547

ELECTRIC POWER TOOL WITH VIBRATION MECHANISM

MAKITA CORPORATION, Anjo...

1. An electric power tool with a vibration mechanism, comprising:
a motor;
a final output shaft configured to rotate about a longitudinal axis and to which rotation is transmitted from the motor;
a vibration mechanism including a first cam secured integrally to the final output shaft such that the first cam and final
output shaft move together, a second cam that interlocks with a rear of the first cam and is provided to an exterior of the
final output shaft so as to be rotatable relative to the final output shaft, and a vibration switching member configured to
move between a first position in which the vibration switching member is latched to the second cam so as to restrict relative
rotation between the second cam and the final output shaft and a second position in which the vibration switching member is
positioned apart from the second cam, such that the second cam rotates relative to the final output shaft, thus causing vibration
in an axial direction provided to the final output shaft; and

a switching operation member that is provided to the housing and causes the vibration switching member to move between the
first position and the second position; wherein

the vibration switching member is a ring body and a first protrusion provided on an outer circumference of the second cam
is configured to latch a second protrusion provided on an inner circumference of the vibration switching member, the first
protrusion protruding radially outwardly and the second protrusion protruding radially inwardly.

US Pat. No. 9,302,406

POWER TOOLS

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a tool unit configured to be able to machine a workpiece; and
a base device defining a base surface for contacting with the workpiece, the base device being configured to support the tool
unit with the tool unit positioned relative to the workpiece; wherein:

the tool unit includes a housing and a rotary drive device disposed within the housing, the housing having an outer circumferential
surface including a contact surface that is configured to be clamped by the base device;

the housing includes an internal housing portion and an external housing portion that are integrated with each other to form
a double housing structure;

the internal housing portion is made of resin and is opposed to the rotary drive device;
the external housing portion is made of metal and defines the circumferential surface of the housing;
each of the internal housing portion and the external housing portion has a substantially cylindrical tubular shape and the
internal housing portion and the external housing portion are coaxial with each other;

each of the internal housing portion and the external housing portion has an opening at one end and a partially closed bottom
at the other end, the bottom of the internal housing portion and the bottom of the external housing portion are positioned
on opposite sides with respect to an axial direction of the housing; and

the bottom of the internal housing extends substantially perpendicular to the axial direction.

US Pat. No. 9,114,500

SANDER HAVING BATTERY PACK

MAKITA CORPORATION, Anjo...

1. A sander comprising:
a housing;
an upper portion of the housing configured as a holding portion;
an output shaft that rotates around a rotational axis, the rotational axis of the output shaft extending in a vertical direction
inside the housing and being configured to be aligned with the upper portion;

a pad configured to be driven about the output shaft;
a battery removably attached to an outside of the housing, the battery is removably attached to an attachment portion of the
housing; and

a motor powered by the battery and configured to drive the pad, the motor being disposed inside the housing,
wherein the battery is elongated along a longitudinal axis such that when the battery is attached to the housing, the longitudinal
axis is oriented at an angle not less than 0 degrees with respect to the vertical direction,

the motor is disposed on a side opposite to the attachment portion with respect to a position of the holding portion,
the rotational axis of the output shaft is provided perpendicular to the pad and parallel to a rotation shaft of the motor,
and

the battery is arranged such that the longitudinal axis is oriented at an angle not less than 0 degrees with respect to the
rotation shaft of the motor, and the battery is slidably attached to the attachment portion from a direction parallel to the
longitudinal axis, and

a height of the housing in the vertical direction along the rotational axis of the output shaft is longer than a longest length
of the housing in a horizontal direction, from a front of the housing to a back of the housing.

US Pat. No. 9,077,054

BATTERY PACK FOR ELECTRIC POWER TOOL WITH REDUCED DIFFERENCE IN VOLTAGES OF MULTIPLE CELLS CONSTITUTING BATTERY

MAKITA CORPORATION, Anjo...

1. A battery pack for an electric power tool, comprising:
a battery constituted by connecting multiple chargeable and dischargeable cells in series;
a connecting device that connects selectively a battery charger or the electric power tool to the battery;
a battery charger detecting device that detects a connection of the battery charger to the connecting device;
a voltage measuring device that measures voltages of the respective cells, the voltage measuring device measuring the voltages
of the respective cells when the battery charger detecting device detects the connection of the battery charger to the connecting
device in a state where the battery has not been connected to the battery charger for a predetermined specified period of
time or more and power feeding to the electric power tool has not been performed for the specified period of time or more;

a discharging device that allows the cells to discharge individually; and
a control device that determines the necessity of a balancing control to reduce difference in voltages of the respective cells
based upon the voltages of the respective cells measured by the voltage measuring device, the control device that controls
a subject cell, which is subject to the balancing control from among the cells, to discharge via the discharging device when
the balancing control is determined to be necessary.

US Pat. No. 9,604,296

WORKING MACHINE

MAKITA CORPORATION, Aich...

1. A working machine having an internal combustion engine provided as a power source and performing switching among stop,
drive, and choke operations of the internal combustion engine, the working machine comprising:
an operation lever turnable to a stop position in which the internal combustion engine is stopped, a drive position in which
the internal combustion engine is made to be operational, and a choke position in which the choke operation is performed;

a turning member turnably combined with the operation lever;
a coupling biasing member that couples the operation lever to the turning member and imparts relative turning forces to both
of the operation lever and the turning member; and

a choke rod with one end coupled to a choke operating member that operates a choke valve and the other end coupled to the
turning member,

wherein the operation lever and the turning member are held in a state of abutting each other due to the turning forces imparted
by the coupling biasing member, and the turning member is regulated in turning in a direction from the drive position to the
stop position,

wherein when the operation lever is turned from the drive position to the choke position, the turning member turns along with
the operation lever to move the choke rod, and the movement of the choke rod causes the choke operating member to close the
choke valve,

whereas when the operation lever is turned from the drive position to the stop position, the operation lever moves against
the turning force imparted by the coupling biasing member without turning the turning member.

US Pat. No. 9,312,795

ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:
a motor comprising a rotor, the rotor comprising a permanent magnet;
a control unit that is configured to set a control amount of the motor in accordance with operation of an operation portion
and to drive-control the motor based on the control amount; and

a number-of-rotations detection unit that is configured to detect the number of rotations of the motor,
wherein the control unit is configure to shift drive control of the motor to rotation control, in which the control amount
is made to be increased or decreased so that the number of rotations of the motor becomes a predetermined target number of
rotations during driving of the motor, when at least one predetermined execution condition is satisfied and the number of
rotations detected by the number-of-rotations detection unit has reached an upper limit number of rotations set in advance,
the at least one execution condition being a condition that there is a possibility that the number of rotations may exceed
the upper limit number of rotations during no-load operation of the motor due to a decrease in magnetic force of the rotor
caused by a rise in temperature of the rotor.

US Pat. No. 9,192,222

BACKPACK WORK MACHINE

MAKITA CORPORATION, Aich...

1. A backpack work machine comprising:
a backpack frame configured to be secured to a back of a worker;
a motor mounted on the backpack frame;
a driven device driven by the motor; and
an arm provided at a lower portion of the backpack frame, the arm being rotatable around an axis line that extends in a left-right
direction of the backpack frame and having in a fore end portion thereof a throttle lever regulating output of the motor,
wherein

the backpack frame has in the lower portion thereof a support axis having a linear axis line, and the arm is supported by
the support axis so as to be rotatable around the axis line of the support axis within a rotation range that extends between
an up-down direction of the backpack frame and a front-rear direction of the backpack frame.

US Pat. No. 9,357,711

ELECTRICALLY POWERED GARDENING TOOL

MAKITA CORPORATION, Aich...

1. An electrically powered gardening tool comprising:
a speed-reduction gear rotatably mounted to a bottom surface of a motor housing and driven by an electric motor housed within
the motor housing;

a crank-cam defined by overlapped eccentric disk plates connected to a bottom surface of the speed-reduction gear; and
a pair of reciprocating shear blades operatively connected to the eccentric disk plates, wherein
one of the eccentric disk plates and the speed-reduction gear further includes connecting pins that connect the one of the
eccentric disk plates and the speed-reduction gear to the other of the eccentric disk plates and the speed-reduction gear,

elastic bushings are disposed in mounting holes provided in the other of the eccentric disk plates and the speed-reduction
gear,

the connecting pins are received in the mounting holes to engage with the elastic bushings so as to cause the eccentric disk
plates to rotate with the speed-reduction gear, and

stoppers are provided in the mounting holes and are configured to abut against a surface of the mounting holes to restrict
deformation of the elastic bushings caused by a load applied to the eccentric disk plates.

US Pat. No. 9,114,520

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a driving motor configured to output any number of output rotations;
a spindle equipped with a front tool;
a continuously variable transmission mechanism configured to seamlessly shift the number of the output rotations from the
driving motor in any ratio and output the shifted number of the output rotations to the spindle;

a rotational speed of the spindle changed by both the shifted number of the output rotations of the driving motor and a changed
ratio of the continuously variable transmission mechanism;

a low speed section of the spindle; and
a high speed section of the spindle, wherein
the rotational speed of the spindle in the high speed section is higher than the rotational speed of the spindle in the low
speed section,

reduction by the continuously variable transmission mechanism has priority over reduction of the driving motor when the rotational
speed of the spindle is reduced in the high speed section, and

the output rotations of the driving motor reduce the rotational speed of the spindle in the low speed section.

US Pat. No. 9,505,095

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a tool body having a tool holder, the tool holder being configured to receive a tool bit such that the tool bit is relatively
movable with respect to the tool body in a longitudinal direction of the tool bit;

a dust catching device attachable to the tool body;
an engagement portion configured to engage the tool body with the dust catching device, the engagement portion including a
guide groove and a guide rail engageable to the guide groove, the guide groove being provided to one of the tool body and
the dust catching device while the guide rail being provided to another of the tool body and the dust catching device, the
guide groove and the guide rail extending parallel to the longitudinal direction of the tool bit;

a wedge-shaped member configured to be disposed between the tool body and the dust catching device; and
a biasing member that biases the wedge shaped member,
wherein the biased wedge-shaped member biases the tool body and the dust catching device in a direction crossing the longitudinal
direction of the tool bit in a state that the tool body and the dust catching device are engaged to each other by the engagement
portion.

US Pat. No. 9,595,839

ADAPTER FOR POWER TOOLS, POWER TOOL SYSTEM AND METHOD OF OPERATING THE SAME

MAKITA CORPORATION, Anjo...

1. An adapter for a power tool powered by a detachable battery pack, comprising:
an adapter housing,
means for detachably connecting the adapter housing to only the power tool,
an adapter controller disposed within the adapter housing,
at least one memory and/or storage device disposed within the adapter housing and in communication with the adapter controller,
and

at least one communication port disposed on the adapter housing configured to transmit electrical communications from the
adapter controller to a controller located in the power tool and from the controller located in the power tool to the adapter
controller when the adapter housing is connected to the power tool,

wherein the adapter is configured such that, when a battery pack having a battery pack controller, is connected to the power
tool, a communication path is established from the battery pack controller to the adapter controller via the power tool controller,

wherein the adapter is configured to change one or more operating parameters stored in a memory of the battery pack and/or
the power tool,

wherein the one or more operating parameters includes a maximum charged level of the battery pack, and
wherein the maximum charged level determines a stopping point for a charging operation of the battery pack.

US Pat. No. 9,469,023

POWER TOOLS

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a continuously variable transmission configured to change a velocity of a rotational output from a drive motor and to output
the rotational output to a spindle to which a tip end tool is mounted;

a condition detection device configured to detect a condition of the power tool; and
an operation control device configured to (i) exhibit a plurality of control patterns with respect to RPM of the drive motor
and a transmission gear ratio of the continuously variable transmission, (ii) determine a target RPM of the spindle based
on the condition of the power tool detected by the condition detection device, (iii) select one control pattern out of the
plurality of control patterns, and (iv) control the RPM of the drive motor and the transmission gear ratio of the continuously
variable transmission based on the target RPM and the selected control pattern.

US Pat. No. 10,052,747

HAMMER TOOL

MAKITA CORPORATION, Anjo...

1. A hammer tool which at least linearly drives a tool bit at least linearly in a longitudinal direction of the tool bit and performs a hammering operation on a workpiece, comprising:a main body,
a cylinder which is arranged in the main body and extended in the longitudinal direction of the tool bit,
a hammering element which drives linearly in the longitudinal direction of the tool bit in the cylinder and hits the tool bit,
a driving element which is slidably arranged in the cylinder and is configured to move the hammering element, and
a driving apparatus which drives the driving element,
wherein the driving element is arranged inside the cylinder such that it reciprocally moves in the cylinder along the longitudinal axis of the cylinder between a first position at which the driving element is most remote from the tool bit and a second position at which the driving element is closest to the tool bit,
when the driving element is moved from the first position to the second position, the driving element moves the hammering element toward the tool bit and the hammering element hits the tool bit, and
wherein the reciprocal movement of the driving element has a stroke center position relative to the cylinder between the first position and the second position; and
wherein the driving element and driving apparatus are configured to change the stroke center position.

US Pat. No. 10,142,724

SOUND OUTPUT DEVICES

MAKITA CORPORATION, Anjo...

1. A sound output device comprising:a sound output unit configured to output sound to an exterior, wherein the sound output unit comprises a magnet and voice coil;
a battery attachment unit to which an electric tool battery is attached, wherein the battery attachment unit comprises an electrical contact terminal and a female hook formed by recesses for attaching the battery; and
a case configured to support the sound output unit and the battery attachment unit, wherein:
the case includes a first inner wall structure configured to define a first inner space accommodating the sound output unit, and a second inner wall structure configured to define a second inner space different from the first inner space, and the second inner wall structure is configured to resonate the sound output of the sound output unit,
the first inner space and the second inner space are divided from each other by a partition, and
the partition has an elastic partition formed so as to be capable of vibration upon receiving the sound output of the sound output unit.

US Pat. No. 9,837,877

ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:
a grip being a portion of the electric power tool that is configured to be gripped by a user in order to operate the electric
power tool;

a stator of a motor is housed in the grip and located coaxial to the grip, the stator comprising a stator core, wherein:
an electric wire for the motor is passed through a ferrite core; and
the ferrite core is located inside an outer peripheral surface of the stator in a radial direction.

US Pat. No. 9,440,344

DUST COLLECTING DEVICE AND IMPACT TOOL

MAKITA CORPORATION, Anjo...

1. A dust collecting device that is attached to an impact tool and collects dust generated by the impact tool which includes
a tool body and an auxiliary handle removably mounted to the tool body and in which a tool bit coupled to a front end region
of the tool body is caused to rectilinearly move in an axial direction of the tool bit, comprising:
a dust collecting part having a dust suction port at its front end,
a dust collecting hose which is connected to the dust collecting part and through which dust is transferred downstream, and
a hose holding part for holding the dust collecting hose,
wherein the hose holding part can be mounted to and removed from the auxiliary handle, and
wherein the auxiliary handle includes a ring-like mounting part which can hold the tool body from outside, a base formed on
the mounting part, a rod-like grip to be held by a user, and an arm extending from the grip in a direction transverse to a
longitudinal direction of the grip and having an extending end, and the base and the extending end are arranged in parallel
to the longitudinal direction of the grip and clamped by using a bolt extending therethrough and a nut threadingly engaged
with the bolt, so that the mounting part holds the tool body, and wherein the hose holding part is mounted to the tool body
together with the auxiliary handle by the clamping with the bolt and the nut.

US Pat. No. 9,049,816

BUSH CUTTER

MAKITA CORPORATION, Anjo...

1. A bush cutter comprising:
a main pole;
a cutting blade disposed at an anterior end of the main pole;
a prime mover disposed at a posterior end of the main pole and configured to drive the cutting blade; and
a handle disposed at an intermediate portion of the main pole and provided with a grip that is configured to be grasped by
a user, wherein

the grip is provided with a driving switch for driving the cutting blade, and a speed adjusting switch for adjusting a rotation
speed of the cutting blade,

the speed adjusting switch comprises a first operating projection that projects from a first side surface of the grip and
a second operating projection that projects from a second side surface of the grip, the second side surface facing an opposite
direction relative to the first side surface, and

the speed adjusting switch comprises a cutaway section that is configured to receive a part of the driving switch when the
driving switch is manually-operated by the user.

US Pat. No. 9,553,542

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool which drives a tool bit and performs a predetermined operation on a workpiece, comprising:
a motor,
a driving member which is driven by the motor and reciprocated, wherein the driving member drives the tool bit by means of
its reciprocating movement, and

a controller which controls the motor,
wherein, in a driving cycle which is defined by a forward movement stroke and a backward movement stroke of the driving member,
the power tool is configured to perform the predetermined operation on the workpiece by the tool bit in response to one stroke
among the forward and backward movement strokes,

a control factor for controlling a driving of the motor is defined by at least one of a voltage value of a voltage applied
on the motor and a duty ratio of a driving pulse signal utilized to drive the motor, and

the controller is configured to set the control factor in said one stroke to be larger than that in another stroke and drive
the motor.

US Pat. No. 9,498,831

SLIDE TYPE CIRCULAR SAW

MAKITA CORPORATION, Anjo...

1. A slide type circular saw comprising:
a base;
a saw unit disposed above the base and configured to be movable upward and downward, the saw unit having a motor-driven rotary
saw blade; and

a slide bar unit, the slide bar unit comprising:
a first holding portion including a plurality of linear ball bearing parts that are press-fitted in the first holding portion,
the plurality of linear ball bearing parts being arranged in an axial direction relative to the first holding portion;

a second holding portion including: (1) a linear ball bearing part that is loosely inserted in the second holding portion,
and (2) a pair of setscrews screwed at front and rear spots in the second holding portion, respectively, the pair of setscrews
directly contacting an outer surface of the linear ball bearing part of the second holding portion, (i) the linear ball bearing
part of the second holding portion having a cylindrical shape such that an outer surface of the linear ball bearing part has
a circular shape when viewed from an axial direction of the linear ball bearing part and the circular shape extends along
an entire length of the linear ball bearing part in the axial direction of the linear ball bearing part, a diameter of the
circular shape being the same over the entire length of the linear ball bearing part in the axial direction of the linear
ball bearing part, and (ii) an inner surface of the second holding portion having a circular shape when viewed from the axial
direction of the linear ball bearing part and the circular shape of the inner surface of the second holding portion extends
along an entire length of the second holding portion in the axial direction of the linear ball bearing part, a diameter of
the circular shape of the inner surface of the second holding portion being the same over the entire length of the second
holding portion in the axial direction of the linear ball bearing part;

a pair of slide bars extending parallel to each other in a front-rear direction and each having a front end and a rear end,
the pair of slide bars being slidably supported and surrounded by the linear ball bearing parts of the first holding portion
and the second holding portion, respectively; and

a pair of holders forming a front holder by which the front ends of the slide bars are connected and a rear holder by which
the rear ends of the slide bars are connected, wherein:

(1) the saw unit is mounted to one of the front and rear holders with the holding portions being fixed to the base, or (2)
the saw unit is mounted to the holding portions with the slide bars being fixed to the base, whereby the saw unit is rendered
slidable in the front-rear direction, and

the pair of setscrews press the outer surface of the linear ball bearing part of the second holding portion against the inner
surface of the second holding portion in a direction perpendicular to a plane which contains axes of the slide bars, such
that i) upward and downward motions of the linear ball bearing part of the second holding portion are restricted to prevent
wobbling of the slide bars during a sliding operation of the saw unit (ii) while a movement of the linear ball bearing part
of the second holding portion in the axial direction of the linear ball bearing part is permitted.

US Pat. No. 9,333,669

CUTTING DEVICES

MAKITA CORPORATION, Anjo...

1. A cutting device, comprising:
a cutting unit having a cutter for trimming an edge portion of a workpiece or forming a groove in a workpiece,
a base assembly configured to support the cutting unit with respect to the workpiece; and
a grip device capable of being mounted to and removed from the cutting unit independently of the base assembly and configured
to be capable of being grasped by a user during a cutting operation,

wherein a mount position of the grip device to the cutting unit is adjustable in a vertical direction.

US Pat. No. 9,112,360

POWER SUPPLY DEVICE

MAKITA CORPORATION, Anjo...

1. A power supply device that supplies electric power from a plurality of batteries to an electrical apparatus, the power
supply device comprising:
a plurality of battery interfaces configured to removably receive at least three batteries including a first battery, a second
battery and a third battery, wherein each of the first, second and third batteries includes a positive electrode terminal
and a negative electrode terminal;

a connection circuit configured to electrically connect the at least three batteries to each other, wherein the connection
circuit is capable of connecting at least two batteries in parallel and connecting at least one other battery to the at least
two parallel-connected batteries in series and includes:

a high-voltage conductive line,
a low-voltage conductive line,
a medium-voltage conductive line including a first portion and a second portion,
a first switch configured to electrically and selectively connect the positive electrode terminal of the first battery to
one of the high-voltage conductive line or the first portion of the medium-voltage conductive line,

a second switch configured to electrically and selectively connect the positive electrode terminal of the second battery to
one of the high-voltage conductive line or the first portion of the medium-voltage conductive line,

a third switch configured to electrically and selectively connect the positive electrode terminal of the third battery to
one of the high-voltage conductive line or the first portion of the medium-voltage conductive line,

a fourth switch configured to electrically and selectively connect the negative electrode terminal of the first battery to
one of the low-voltage conductive line or the second portion of the medium-voltage conductive line,

a fifth switch configured to electrically and selectively connect the negative electrode terminal of the second battery to
one of the low-voltage conductive line or the second portion of the medium-voltage conductive line,

a sixth switch configured to electrically and selectively connect the negative electrode terminal of the third battery to
one of the low-voltage conductive line or the second portion of the medium-voltage conductive line, and

a pair of output terminals configured to output electric power from the at least three batteries while the connection circuit
electrically connects the at least one other battery to the at least two parallel-connected batteries,

wherein the connection circuit is capable of switching connection state of the at least three batteries among:
a first state connecting the second battery to the third battery in parallel and connecting the first battery to the second
and third batteries in series; and

a second state connecting the first battery to the third battery in parallel and connecting the second battery to the first
and third batteries in series; and

a third state connecting the first battery to the second battery in parallel and connecting the third battery to the first
and second batteries in series.

US Pat. No. 9,509,180

BRUSHLESS MOTOR FOR ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. A brushless motor for an electric power tool configured such that a rotor having a bonded magnet is radially disposed on
the inner side of a stator having winding wires, wherein,
the rotor includes a shaft and the bonded magnet that is radially disposed on the outer side of the shaft;
a through hole into which the shaft is inserted is axially formed at the center of the bonded magnet;
a resin is filled between an inner peripheral surface of the through hole and an outer peripheral surface of the shaft;
an inner wall surface of the through hole of the bonded magnet and the outer peripheral surface of the shaft are shaped such
that rotation of the shaft with respect to the bonded magnet is prevented through the resin;

a plurality of grooves that extend in an axial direction are formed on the inner wall surface of the through hole of the bonded
magnet in a circumferential direction;

the number of the grooves is configured to be larger than the number of poles of the bonded magnet;
a resin block that is integrally formed with the shaft and is provided on the outside of the shaft in the radial direction
such that rotation of the resin block with regard to the shaft is prevented; and

an axial end surface of the resin block has a plurality of first recesses and a plurality of first protrusions that are arranged
in a circumferential direction, the first recesses and the first protrusions being alternately arranged, and further wherein
an axial end surface of the bonded magnet has a plurality of second protrusions and a plurality of second recesses that are
arranged in a circumferential direction, the second protrusions and the second recesses being alternately arranged, and further
wherein by engaging the plurality of the first recesses and the plurality of the first protrusions with the plurality of the
second protrusions and the plurality of the second recesses, respectively, the axial end surface of the resin block is configured
to be engaged with the axial end surface of the bonded magnet in the circumferential direction.

US Pat. No. 9,469,022

DRIVING TOOLS

MAKITA CORPORATION, Anjo...

1. A driving tool comprising:
a tool body;
a magazine coupled to the tool body and configured to receive a fastener strip, the fastener strip being inserted into the
magazine by moving in a feeding direction, the fastener strip having fasteners connected in the series with each other, the
fasteners being arranged in parallel to each other and displaced from each other in axial directions of the fasteners; and

a restricting member permitting the fastener strip to be inserted into the magazine in the feeding direction to reach a predetermined
position for a driving operation by the tool body when the fastener strip is properly oriented, the restricting member preventing
the fastener strip from being inserted into the magazine in the feeding direction to reach the predetermined position when
the fastener strip is improperly oriented,

wherein the axial directions of the fasteners are substantially parallel to a driving direction of the fasteners when the
fastener strip is properly oriented;

the axial directions of the fasteners are not parallel to the driving direction of the fasteners when the fastener strip is
improperly oriented,

the restricting member is mounted within the magazine and includes a guide portion and a restricting portion;
as the properly oriented fastener strip is inserted into the magazine in the feeding direction, the fastener strip interacts
with the guide portion to cause movement of the restricting portion from a restricting position to a rest position, so that
the fastener strip is permitted to reach the predetermined position;

as the improperly oriented fastener strip is inserted into the magazine in the feeding direction, the fastener strip interacts
with the restricting portion, so that the fastener strip is prevented from reaching to the predetermined position;

the guide portion and the restricting portion of the restricting member are formed integrally with each other as a single-piece
member;

the restricting member further includes a base portion, the base portion being fixedly attached to a wall of a nail storage
space of the magazine;

the restricting portion extends rearwardly from the base portion in a direction opposite to the feeding direction: and
the guide portion, the restricting portion and the base portion of the restricting member are formed integrally with each
other as the single-piece member.

US Pat. No. 9,224,994

ELECTRIC POWER TOOL POWERED BY BATTERY PACK AND ADAPTER THEREFOR

MAKITA CORPORATION, Anjo...

1. An adapter for coupling at least one battery pack with an electric power tool, the adapter comprising:
a battery-side unit configured to attach the at least one battery pack and be electrically connected to the at least one battery
pack that is attached;

at least two tool-side units configured to attach the electric power tool and be electrically connected to the attached electric
power tool; and

a voltage regulator circuit configured to be interposed between the at least one battery pack attached to the battery-side
unit and the electric power tool attached to the tool-side unit, and regulate a supply voltage from the at least one battery
pack to the electric power tool to a level corresponding to a rated voltage of the electric power tool,

wherein:
the at least two tool-side units include a first tool-side unit and a second tool-side unit;
the first tool-side unit and the second tool-side unit are configured to be alternatively attachable to the battery-side unit;
the first tool-side unit is configured to be attachable to an electric power tool having a first rated voltage and not to
be attachable to an electric power tool having a second rated voltage;

the second tool-side unit is configured to be attachable to the electric power tool having the second rated voltage and not
to be attachable to the electric power tool having the first rated voltage; and

the voltage regulator circuit is configured to regulate the supply power to a level being substantially equal to the first
rated voltage when the battery-side unit is attached to the first tool-side unit, and regulate the supply power to a level
being substantially equal to the second rated voltage when the battery-side unit is attached to the second tool-side unit;

each tool-side unit is provided with storing means configured to store data by which an identification can be made from the
other tool-side unit; and

the voltage regulator circuit is configured to read the data from the storing means of the tool-side unit to identify the
tool-side unit attached to the battery-side unit.

US Pat. No. 9,606,188

MEASUREMENT SYSTEM

MAKITA CORPORATION, Anjo...

1. A measurement system comprising:
a battery pack containing a battery; and
at least one type of connected device to which the battery pack is to be connected,
wherein the battery pack comprises a first detection device that is configured to detect a predetermined physical quantity
in the battery pack and that has a predetermined measurement range,

wherein the at least one type of connected device comprises a second detection device that is configured to detect a physical
quantity and that has a measurement range different from the measurement range of the first detection device, wherein the
physical quantity is the same as the predetermined physical quantity,

wherein one of the battery pack and the at least one type of connected device is a first device, and the other of the battery
pack and the at least one type of connected device is a second device, the first device comprising:

a receiving device configured to receive a detection-value-related information that is transmitted from the second device
and that directly or indirectly indicates a detection result by one of the first detection device and the second detection
device; and

a measurement processing device configured to (i) perform a predetermined measurement process by using the detection-value-related
information received by the receiving device in a case where the receiving device receives the detection-value-related information
and (ii) to perform the measurement process by using a detection result by one device of the first detection device and the
second detection device in a case where the receiving device does not receive the detection-value-related information, the
measurement process comprising calculation of a remaining battery capacity of the battery, and the one device being provided
in the first device, and

wherein the second device comprises a transmission device configured to transmit the detection-value-related information to
the first device.

US Pat. No. 9,203,249

BATTERY PACK FOR ELECTRIC POWER TOOL, CONTROL CIRCUIT, AND PROGRAM

MAKITA CORPORATION, Anjo...

1. A battery pack for electric power tool which is configured to supply electric power to a body of the electric power tool,
the battery pack comprising:
a battery that has at least one battery cell; and
a control circuit that is configured to operate by electric power of the battery and has a function to monitor at least a
state of the battery, the control circuit including:

a condition satisfaction determination unit that is configured to determine whether or not each of a plurality of sleep-mode
transition conditions is satisfied, and also to determine whether or not an all-condition satisfaction state is present, which
is a state wherein all of the plurality of sleep-mode transition conditions are satisfied, the plurality of sleep-mode transition
conditions including all of conditions (a) to (e) below:

(a) a charger unconnected state is present, which is a state wherein the battery pack is not connected to a charger for charging
the battery;

(b) a non-discharging state is present, which is a state wherein a discharge current is not flowing from the battery to the
body of the electric power tool;

(c) a charging unexecuted state is present, which is a state wherein a charging current for charging the battery is not flowing;
(d) an operation switch-off state is present, which is a state wherein an operation switch that is provided in the body of
the electric power tool on which the battery pack is attached and which operates by receiving power supply from the battery,
and that is externally operated in order to operate or stop the body of the electric power tool, is turned off; and

(e) an overloaded state is not present, which is a state wherein there is a risk that overcurrent which is equal to or larger
than a predetermined overcurrent threshold may flow from the battery to the body of the electric power tool when the operation
switch is turned on;

a continuity satisfaction determination unit that is configured to determine whether or not the all-condition satisfaction
state has continued for a predetermined period of time when it is determined by the condition satisfaction determination unit
that the all-condition satisfaction state is present; and

a sleep-mode transition unit that is configured to stop part of operation of the control circuit thereby to shift the control
circuit to a sleep mode when it is determined by the continuity satisfaction determination unit that the all-condition satisfaction
state has continued for the predetermined period of time.

US Pat. No. 9,196,879

BATTERY PACK

MAKITA CORPORATION, Anjo...

1. A battery pack configured to be able to be mounted on a tool body of an electric tool as a power source of the electric
tool, the battery pack comprising:
a housing case configured as an outer cover, the housing having a first side wall and a second side wall, the second side
wall extending substantially in parallel with the first side wall;

a plurality of battery cells disposed in the housing case, the plurality of battery cells being disposed such that longitudinal
axes of the plurality of battery cells extend substantially parallel to each other from a side of the first side wall toward
a side of the second side wall,

a drainage device provided at a bottom portion of the housing case and having a drain hole communicating between an inside
and an outside of the housing case, the drainage device being configured to discharge water introduced into the housing case
to the outside of the housing case through the drain hole, and

a first terminal member and a second terminal member each connected to at least one of electrodes of the plurality of battery
cells, both the first terminal member and the second terminal member being disposed adjacent to the first side wall and along
the first side wall so that the first terminal member and the second terminal member face the first side wall,
wherein the drainage device is disposed at least between the first terminal member and the second terminal member.

US Pat. No. 9,190,947

ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:
a tool main body;
an induction motor configured to generate a power of the electric power tool;
a power supply unit configured to rectify an alternating-current voltage supplied from an external alternating-current power
source and generate a drive voltage for driving the induction motor; and

an inverter configured to receive supply of the drive voltage from the power supply unit and drive the induction motor,
wherein the power supply unit and the inverter are integrally incorporated in the tool main body together with the induction
motor,

wherein the induction motor includes at least one phase winding,
wherein the power supply unit includes a rectifier circuit configured to perform full-wave rectification of the alternating-current
voltage and output a full-wave rectified voltage as an output voltage,

wherein the inverter includes:
an output voltage detection circuit configured to detect a level of the output voltage outputted from the rectifier circuit;
a switching circuit having a plurality of switching elements configured to apply the output voltage outputted from the rectifier
circuit to the at least one phase winding of the induction motor; and

a control unit configured to perform a drive control of each of the plurality of switching elements so that a rotation speed
of the induction motor becomes a predetermined speed,

wherein the control unit includes:
a drive frequency calculation unit configured to set a drive frequency of the induction motor, based on a rotation speed of
the induction motor and a slip frequency of the induction motor;

a drive unit configured to drive each of the plurality of switching elements depending on the drive frequency set by the drive
frequency calculation unit; and

a slip frequency setting unit comprising a slip frequency control table and configured to detect a change in the drive voltage
generated by the power supply unit from the level of the output voltage detected by the output voltage detection circuit and
set the slip frequency depending on the change in the drive voltage generated by the power supply unit, the slip frequency
control table storing slip frequency data corresponding to the level of the output voltage detected by the output voltage
detection circuit.

US Pat. No. 9,168,650

OSCILLATING ROTARY ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An oscillating rotary electric power tool comprising:
a housing provided to extend in a longitudinal direction;
a motor accommodated in the housing;
a spindle projected downward from a front end portion of the housing;
a distal end tool to be attached to the spindle;
a coupling member accommodated in the housing and coupled to an output shaft of the motor on an identical axis to that of
the output shaft to be rotatable integrally with the output shaft;

a crankshaft accommodated in the housing, arranged to be rotatable on the identical axis, and fitted with the coupling member
in a depression and projection fitting structure; and

a link member accommodated in the housing, to which the spindle is fixed and power is transmitted from the crankshaft to rotate
clockwise and counterclockwise in an oscillating manner,

wherein the link member is driven by the motor through the coupling member and the crankshaft to rotate the spindle clockwise
and counterclockwise in the oscillating manner, and

an elastic body is interposed between the coupling member and the crankshaft in a direction of the identical axis to fit the
coupling member and the crankshaft together in the depression and projection fitting structure.

US Pat. No. 10,074,267

APPARATUS FOR ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An apparatus for an electric power tool, comprising:a controller configured to control an operation of the apparatus for an electric power tool in accordance with operating conditions that are previously set;
a storage device configured to previously store a settable item indicating an operating condition whose setting is changeable, among the operating conditions, and a settable range of the operating condition; and
a communication device configured to perform communication with an external device,
wherein the controller is configured to:
read the settable item and the settable range from the storage device in accordance with a request from the external device received by the communication device, and to transmit the settable item and the settable range to the external device through the communication device,
determine, when a change request of the operating condition transmitted from the external device is received by the communication device, whether the change request corresponds to the settable item and the settable range stored in the storage device,
change a setting of the operating condition in accordance with the change request if the change request corresponds to the settable item and the settable range,
either prohibit change of the setting of the operating condition or correct the change request and then change the setting of the operating condition if the change request does not correspond to the settable item and the settable range, and
set, if the change request corresponds to the settable item stored in the storage device and is outside the settable range stored in the storage device, the operating condition to one of an upper limit value and a lower limit value that is closest to the change request within the settable range in accordance with the change request.

US Pat. No. 9,559,539

ELECTRIC APPARATUS

MAKITA CORPORATION, Anjo...

1. An electric apparatus having a heat generating function,
wherein,
the electric apparatus is configured to use, as a main power source of the electric apparatus, (1) a battery that has a power
capacity to fully power an electric power tool and (2) an ordinary AC power source, whereby the battery is configured to be
removable from the electric apparatus and has connectors that mechanically connect with corresponding connections of the electric
power tool to fully power the electric power tool;

by use of the heat generating function, water can be boiled with a power supply that can supply power from the battery and
alternatively from the AC power source;

the electric apparatus comprises a circuit that can detect current and voltage of the battery;
the electric apparatus has a function of shutting off the power supply of the electric apparatus and stopping operation of
the electric apparatus when an output current of more than a predetermined value or an output voltage of less than a predetermined
value is detected in the electric apparatus such that both the electric apparatus and the battery are prevented from being
damaged by arranging a current detection element in a negative line of the electric apparatus and a voltage detection element
between a positive and negative line of the electric apparatus, wherein the electric apparatus is separate from the battery;
and

the electric apparatus has a heat retention function by which the power supply is suppressed and water temperature is maintained
by the battery after the water is boiled.

US Pat. No. 9,543,871

MOTOR-DRIVEN APPLIANCE

MAKITA CORPORATION, Anjo...

1. A motor-driven appliance comprising:
a motor;
an appliance element configured to be driven by the motor; and
a controller configured to control a driving output to drive the motor, the controller comprising:
a physical quantity detector configured to detect a physical quantity related to an operating state of the motor;
a variation deriving portion configured to derive a variation in the physical quantity based upon the physical quantity detected
by the physical quantity detector;

a loaded condition detector configured to detect that the motor is under a loaded condition in which the motor is applied
with a load based upon the variation derived by the variation deriving portion; and

a driving output portion configured to generate the driving output corresponding to whether the loaded condition is detected
by the loaded condition detector, the driving output portion being configured to generate the driving output capable of driving
the motor to drive the appliance element at a first speed when the loaded condition is not detected by the loaded condition
detector and to generate the driving output capable of driving the motor to drive the appliance element at a second speed
when the loaded condition is detected by the loaded condition detector, the first speed being a predetermined constant speed,
and the second speed being higher than the first speed.

US Pat. No. 9,463,565

RECHARGEABLE ELECTRIC TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:
a body accommodating a motor, the body having a drainage port;
a handle continuously provided with the body;
a terminal provided on the handle;
a battery connectable to the terminal; and
a seal member sealing the terminal, the seal member having a shape configured to direct liquid to the drainage port,
the handle including a first portion and a second portion, the first portion including a trigger, the first portion extending
in a first longitudinal direction, the second portion disposed below the first portion, the second portion configured to connect
to the battery, the second portion extending in a second longitudinal direction transverse to the first longitudinal direction,
wherein the seal member is disposed on the first portion of the handle.

US Pat. No. 9,467,084

MOTOR-DRIVEN APPLIANCE SYSTEM AND METHOD FOR CONTROLLING THE SYSTEM

MAKITA CORPORATION, Anjo...

1. A motor-driven appliance system, comprising:
a motor-driven appliance having a motor;
at least one control circuit configured to execute a process related to control of the motor-driven appliance; and
a communication device configured to communicate with an external device,
wherein the at least one control circuit is further configured to switch from an active mode to a sleep mode when at least
one predetermined sleep condition is satisfied; and wherein the at least one control circuit is further configured to switch
to the active mode when the communication device receives an external wakeup signal transmitted from the external device while
the at least one control circuit is in the sleep mode, the active mode being a mode in which the at least one control circuit
performs a normal operation, and the sleep mode being a mode in which the at least one control circuit is powered by at least
one power source unit and in which the at least one control circuit stops part of the normal operation to thereby suppress
but not stop power consumption in the at least one control circuit.

US Pat. No. 9,466,860

BATTERY PACK

MAKITA CORPORATION, Anjo...

1. A battery pack configured to be attachable to a charger and electrically-powered equipment, the battery pack comprising:
a battery that is configured to be chargeable by the charger;
a control unit that is configured to monitor a state of the battery to control charges to the battery and discharges from
the battery;

a power supply circuit that is configured to receive electric power selectively from one of the battery and the charger, and
generate a voltage for driving the control unit; and

a switch that is provided on a power supply path between the battery and the power supply circuit, the switch configured to
be turned on or off by the control unit to thereby connect or disconnect the power supply path,

wherein the control unit is further configured to turn off the switch thereby to select the charger as a power supply source
to the power supply circuit at least in a case where the battery is not in an overdischarged state and the battery pack is
attached to the charger.

US Pat. No. 9,392,749

POWER TOOL WITH VIBRATION DAMPENING

MAKITA CORPORATION, Anjo...

1. A gardening trimmer configured to have a pair of shear blades detachably coupled thereto, comprising:
a prime mover configured to drive the pair of shear blades;
an inner housing that houses the prime mover;
an outer housing that at least partially houses the inner housing and comprises at least one grip configured to be grasped
by a user;

at least four vibration insulators disposed between the inner housing and the outer housing, wherein the outer housing supports
the inner housing via the at least four vibration insulators;

a crank member coupled to the prime mover and configured to drive the pair of shear blades, the crank member being disposed
at least partially within the inner housing and being configured to convert rotation of the prime mover into reciprocating
movement for the pair of shear blades; and

a switch operably connected to the prime mover and configured to be operated by the user for energizing the prime mover, the
switch being disposed on the outer housing,

wherein the outer housing comprises a first crossbeam that extends from a first side wall of the outer housing to a second
side wall of the outer housing and a second crossbeam that extends from the first side wall of the outer housing to the second
side wall of the outer housing,

the first crossbeam is disposed forward of a rotational axis of the crank member and the second crossbeam is disposed rearward
of the rotational axis of the crank member,

the inner housing comprises a first through-hole and a second through-hole, the first crossbeam of the outer housing passing
through the first through-hole and the second crossbeam of the outer housing passing through the second through-hole,

two of the at least four vibration insulators are respectively disposed at each respective end of the first through-hole and
between the first crossbeam and the inner housing in a direction perpendicular to a center line of the first crossbeam,

another two of the at least four vibration insulators are respectively disposed at each respective end of the second through-hole
and between the second crossbeam and the inner housing in a direction perpendicular to a center line of the second crossbeam,

wherein the inner housing does not directly contact the outer housing, the first crossbeam or the second crossbeam, and
wherein the outer housing comprises at least one opening, the inner housing being exposed to the outside through the at least
one opening, and

the inner housing comprises at least one raised portion that protrudes at least into a respective one of the at least one
opening of the outer housing.

US Pat. No. 9,318,729

POWER TOOL BATTERY PACK

MAKITA CORPORATION, Anjo...

1. A power tool battery pack, comprising:
a lower side case;
an upper side case fixed to the lower side case;
at least one battery cell housed in the lower side case;
a circuit board electrically connected to the battery cell;
first and second terminals disposed on and connected to the circuit board; and
a slit extending through the circuit board between the first terminal and the second terminal.

US Pat. No. 9,174,290

MOTORIZED WORKING TOOL

MAKITA CORPORATION, Anjo...

1. A motorized working tool comprising:
a motor unit;
a tool for engaging a work piece;
a frame unit with gripping element; and
a mechanical coupling provided between the motor unit and the frame unit, which includes at least one dampening element, wherein:
the frame unit includes at least one abutting element, against which the motor unit abuts when a working force exerted between
the work piece and the tool is below a minimum value and

the minimum value is a force, at which the motor unit starts to detach from the abutting element, wherein
the motor unit includes at least one support element, which abuts against the abutting element when the working force is below
the minimum value.

US Pat. No. 9,148,997

WORK APPARATUS

MAKITA CORPORATION, Aich...

1. A work apparatus comprising:
a drive motor;
a tool head including a tool frame, a bearing, a tool shaft and a rotary tool, the rotary tool being fixed to the tool shaft
and being rotatable on the tool shaft at a rotation frequency, the tool shaft being supported by the bearing within the tool
frame;

a frame tube having a proximal end connected to the drive motor and a distal end connected to the tool frame of the tool head;
a drive shaft rotatably inserted through the frame tube and connecting the drive motor to the tool shaft to rotatably drive
the rotary tool;

a proximal end of the tool shaft is connected to and extends coaxially with a distal end of the drive shaft
a flexible elastic member coaxially disposed surrounding the bearing for elastically supporting the bearing on the connection
of the tool frame and the frame tube, and

wherein the tool head and the frame tube are connected together to define a vibratory system which has a natural frequency
of vibration that is lower than the rotation frequency of the rotary tool.

US Pat. No. 9,113,602

CHIP RECEIVER AND HEDGE TRIMMER HAVING THE SAME

MAKITA CORPORATION, Anjo...

1. A chip receiver attached to a blade unit of a hedge trimmer, wherein the blade unit extends in a longitudinal direction,
the blade unit has a first side and a second side, the first side is an opposite side of the second side in a width direction
which is perpendicular to the longitudinal direction of the blade unit, and the first side has a plurality of cutting edges
arranged along the longitudinal direction, the chip receiver comprising
a receiving portion that is positioned at the second side of the blade unit and configured to receive branches and leaves
cut by the plurality of cutting edges, wherein:

the receiving portion comprises a first longitudinal rib and a second longitudinal rib that each extend in the longitudinal
direction of the blade unit,

the first and second longitudinal ribs each protrude in a height direction which is perpendicular to both the longitudinal
direction and the width direction,

the first and second longitudinal ribs are parallel-arranged in the width direction of the blade unit,
the first longitudinal rib is located between the second longitudinal rib and the blade unit with respect to the width direction
and the first longitudinal rib is located adjacent to the blade unit with respect to the width direction, and

a distance from a peak to a bottom of the first longitudinal rib in the height direction is less than a distance from a peak
to a bottom of the second longitudinal rib in the height direction.

US Pat. No. 9,084,396

HANDHELD POWER WORKING MACHINE

MAKITA CORPORATION, Anjo...

1. A handheld power working machine comprising:
a main body including a driving part;
a working part configured to drive by the driving part; and
a gripper,
the gripper including:
a restriction part configured to be able to switch between at least a restriction state where the gripper is restricted from
rotating with respect to the main body and a release state where the gripper can rotate by releasing the restriction state;
and

a plurality of switching operation parts, wherein:
the gripper is provided to be able to rotate, with respect to the main body, around a rotational axis extending from a front
side, where the working part is located, to a rear side where the gripper is located,

the plurality of switching operation parts are each configured to perform a switching operation to switch between the restriction
state and the release state in the restriction part,

the plurality of switching operation parts are disposed on at least a right side and a left side as viewed toward the front
side of the gripper,

the switching operation parts include respective force point portions that are configured to be pressed while holding the
gripper,

the switching operation parts are provided to be able to slide in a downward direction of the handheld power working machine
with respect to the gripper, and

a direction in which the switching operation parts slide and a direction in which a force acts on the force point portions
are parallel to one another.

US Pat. No. 9,085,075

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool, which actuates a tool linearly in a longitudinal direction of the tool, the power tool performs a predetermined
operation to a workpiece, comprising:
a drive mechanism which actuates the tool;
a rotational shaft which actuates the drive mechanism;
a rotational member which integrally rotates together with the rotational shaft;
a swing member which swings along the longitudinal direction by a rotational motion of the rotational shaft, wherein the swing
member is adapted to be swung by a motion component with respect to a radial direction of a rotational motion of the rotational
member;

a support shaft which supports the swing member as a support point of a swinging motion of the swing member, wherein the support
shaft is arranged to be parallel to the rotational shaft and the support shaft is disposed such that its position change is
prevented; and

a dynamic vibration reducer which alleviates vibration generated when the power tool is performing the predetermined operation,
wherein the dynamic vibration reducer includes a weight which is linearly movable in the longitudinal direction and an elastic
member which biases the weight, and

wherein the weight is adapted to be actuated mechanically and forcibly by a motion component with respect to the longitudinal
direction of the swinging motion of the swing member in a state that the weight is biased by the elastic member.

US Pat. No. 9,073,196

ELECTRIC TOOL WITH C-SHAPED TORQUE TRANSMISSION MEMBER

MAKITA CORPORATION, Anjo...

1. An electric tool comprising:
a power transmission device configured to transmit torque of an electric motor to a driven object, the power transmission
device having a C-shaped torque transmission member capable of radial elastic deformation and interposed, in a plane perpendicular
to a rotational axis of two rotary members in a torque transmission system, between an inner circumferential surface of one
of the two rotary members and an outer circumferential surface of the other of the rotary members, the torque transmission
member being configured to transmit torque in a state (i) that one end thereof in a rotating direction contacts an abutment
surface of the one rotary member and (ii) that the other end of the torque transmission member in the rotating direction contacts
an abutment surface of the other rotary member,

wherein, when the abutment surface of at least one of the rotary members contacts the corresponding end of the torque transmission
member, the abutment surface is opposed to and inclined relative to an end surface of the corresponding end so that the corresponding
end slides in a radial direction along the abutment surface.

US Pat. No. 9,044,848

IMPACT TOOL HAVING A VIBRATION REDUCING MEMBER

MAKITA CORPORATION, Anjo...

1. An impact tool, which performs a predetermined operation on a workpiece by rectilinear movement of a tool bit in an axial
direction of the tool bit, the impact tool comprising:
a motor,
a rotating shaft disposed parallel to the axial direction of the tool bit and configured to be rotationally driven by the
motor about an axis,

a swinging member extending in a first direction transverse to the axis of the rotating shaft, the swinging member being configured
to swing in the axial direction of the tool bit due to rotation of the rotating shaft,

a tool driving mechanism connected to an end region of the swinging member, the tool driving mechanism being caused to rectilinearly
move in the axial direction of the tool bit by a swinging movement of the swinging member, thereby rectilinearly driving the
tool bit, and

a vibration reducing member drivably connected to a connecting part between the swinging member and the tool driving mechanism
by means of a joint arm that swings on a pivot shaft in the axial direction of the tool bit, the vibration reducing member
being configured to reduce vibration in the axial direction of the tool bit caused during operation of the tool bit, wherein:

the vibration reducing member is disposed within a tool body of the impact tool on an opposite side of a rectilinear working
axis of the tool bit relative to the rotating shaft,

the rectilinear working axis is spaced a first distance from the rotating shaft in the first direction, and
the vibration reducing member is spaced a second distance from the rotating shaft in the first direction, the second distance
being greater than the first distance.

US Pat. No. 10,072,587

THROTTLE OPERATING DEVICE

MAKITA CORPORATION, Aich...

1. A throttle operating device that adjusts the opening degree of a throttle valve of an engine, the throttle operating device comprising:a grip;
a throttle lever rotatably attached to the grip, the throttle lever rotationally operated with respect to the grip;
a cable fixer provided in the throttle lever;
an inner cable that is inserted through an outer tube, the inner cable having one end fixed to the cable fixer, and the other end coupled to a valve opener and closer that opens and closes the throttle valve; and
a mover that is provided in the throttle lever and moves the cable fixer along a longitudinal direction of the inner cable,
wherein the one end of the inner cable is fixed to the cable fixer with the extending direction of the inner cable changed within the throttle lever,
wherein the mover includes an adjustable screw that is screwed into a female thread portion formed in the cable fixer, and
wherein the mover is configured so as to move the cable fixer in a direction in which the inner cable is pulled by the adjustable screw being rotated in a first direction and so as to move the cable fixer in a direction in which the inner cable is loosened by the adjustable screw being rotated in a second direction opposite to the first direction.

US Pat. No. 10,039,137

ELECTRIC POWER TOOL AND DUST COLLECTOR

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:a wireless transmission unit that transmits a wireless signal to a dust collector; and
a transmission control unit that causes the wireless transmission unit to transmit a linking signal to the dust collector, to thereby cause the dust collector to operate in a linked manner,
wherein an operation mode of the transmission control unit is shifted, by operation of an operation unit, from a normal mode in which the dust collector is caused to operate in the linked manner to a pairing mode in which the electric power tool is caused to be registered in the dust collector as a link target appliance, and
wherein the transmission control unit is configured, when in the pairing mode, to cause the wireless transmission unit to transmit a pairing request signal to the dust collector, to thereby cause the electric power tool to be registered in the dust collector as the link target appliance.

US Pat. No. 9,950,416

HANDLE AND POWER TOOL COMPRISING SAME HANDLE

MAKITA CORPORATION, Anjo...

1. A power tool comprising:an operation rod as a tool body;
a handle that is connected to an operation rod;
a cutting unit that is disposed on one end of the operation rod and rotatably supports a cutting blade; and
a driving unit that is disposed on the other end of the operation rod and drives the cutting blade;
wherein the handle includes:
a grip,
a cylindrical member integrally connected to the grip and coaxially disposed on the outside of the operation rod,
a support part provided on the operation rod,
an elastic element interposing region,
an elastic element disposed in the elastic element interposing region,
a powder filling region, and
powders filled in the powder filling region,
wherein the handle, the elastic element and the powder filling region are formed in a plane orthogonal to a longitudinal direction of the operation rod, and
wherein the elastic element interposing region is formed between the cylindrical member and the support part, and the powder filling region is formed in the elastic element.

US Pat. No. 9,724,814

IMPACT TOOL

MAKITA CORPORATION, Anjo...

19. An impact tool that performs a prescribed processing operation on a workpiece by carrying out an impact operation on a
tool bit in a longitudinal axis direction, comprising:
a tool main body having a front and a rear and a left side and a right side and a top and a bottom;
a tool bit holder located at the front of the tool main body and configured to hold the tool bit;
an outer-rotor motor housed in the tool main body, the motor comprising a stator and a rotor disposed on an outer side of
the stator;

a motor output shaft configured to be rotated by the rotor, the motor output shaft extending in a front-rear direction and
being disposed parallel to and below an extension line of a longitudinal axis of the tool bit, the motor output shaft being
spaced from the extension line by a prescribed distance;

a drive shaft extending in the front-rear direction and configured to be rotatably driven by the motor output shaft;
an oscillating member supported by the drive shaft and configured to carry out an oscillating movement in the axial direction
of the drive shaft based on the rotational motion of the drive shaft;

a tool drive mechanism coupled to the oscillating member and configured to linearly move the tool bit in the longitudinal
axis direction by the oscillating movement of the oscillating member, thereby linearly driving the tool bit; and

a vibration-preventing mechanism for reducing vibrations of the tool main body, the vibration-preventing mechanism at least
partially overlapping the motor in the front-rear direction when viewed from the right side of the tool main body and at least
partially overlapping the motor in a left-right direction when viewed from the top of the tool main body and at least partially
overlapping the extension of the longitudinal axis of the tool bit when viewed from the right side of the tool main body.

US Pat. No. 9,661,965

BACKPACK WORK APPARATUS

MAKITA CORPORATION, Aich...

1. A backpack work apparatus comprising:
a back carrier frame to be piggybacked by an operator, the back carrier frame having an upper part and a lower part;
a drive motor mounted on the back carrier frame;
a work tool driven by the drive motor;
a pair of right and left shoulder straps each coupled to the back carrier frame for the operator to piggyback the back carrier
frame, each of the shoulder straps having an upper end, a lower end and an intermediate point, the upper end being connected
to the upper part of the back carrier frame and the lower end being connected to the lower part of the back carrier frame;

a chest strap for linking the right and left shoulder straps, the chest strap having a first end joined to the intermediate
point of one of the shoulder straps and a second end joined to the intermediate point of another of the shoulder straps; and

an emergency release buckle device provided at the point where the first end of the chest strap is joined to the intermediate
point of the one of the shoulder straps, the buckle device dividing the one of the shoulder straps into two parts, an upper
strap and a lower strap, the upper strap forming a first coupling end toward the buckle device, the lower strap forming a
second coupling end toward the buckle device and the first end of the chest strap constituting a third coupling end toward
the buckle device, the buckle device normally buckling the first coupling end, the second coupling end and the third coupling
end together, and being capable of releasing at least two of the first, second and third coupling ends from the buckle device
via a one part motion.

US Pat. No. 9,505,097

POWER TOOL

MAKITA CORPORATION, Aich...

1. A hand-held power tool configured to drive a removable tool bit about a longitudinal axis, the power tool comprising:
a tool body;
a tool holder configured to removably hold the tool bit;
a motor that is housed in the tool body, the motor configured to rotatably drive the tool bit;
a torque transmission path connecting the motor to the tool holder;
a first sensor that detects a first driving information corresponding to a kinetic movement state of the tool body when the
tool body is rotated around the longitudinal axis in the event of a working operation of the power tool;

a second sensor that detects a second driving information corresponding to an output torque of the tool bit driven by the
motor; and,

a controller that controls the power tool, wherein the controller is connected to the first sensor and the second sensor,
wherein the controller calculates a holding information corresponding to holding force of the user to hold the tool body based
on the first driving information and the second driving information, and controls the driving of the power tool based on the
holding information.

US Pat. No. 9,502,801

ELECTRIC APPARATUS HAVING A PLATE-SHAPED MALE TERMINAL WITH A LEVEL DIFFERENCE IN ITS THICKNESS DIRECTION

MAKITA CORPORATION, Anjo...

1. An electric apparatus having a male terminal, the electric apparatus configured to be attached to a battery pack having
a female terminal, wherein:
the male terminal is configured to be electrically connected to the female terminal by sliding the battery pack relatively
with respect to the electric apparatus such that the male terminal is inserted to the female terminal in a sliding direction
to come into elastic contact with the female terminal;

the male terminal is configured to have a plate shape, the male terminal extending in the sliding direction and including
a side surface with which the female terminal comes into sliding contact;

a level difference portion is provided in a thickness direction of the male terminal on the side surface of the male terminal;
and

the level difference portion is configured to include an area in which the female terminal comes into sliding contact with
the male terminal.

US Pat. No. 9,467,037

ELECTRIC POWER TOOL HAVING A CONDUCTIVE ELASTIC BODY CONNECTED TO A YOKE

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising;
a motor that is a drive source and is provided with a yoke;
an electric component that is mounted on a drive circuit of the motor; and
a conductive elastic body that is inserted between an end portion of the electric component and the yoke such that the end
portion of the electric component and the yoke are electrically connected by the conductive elastic body;

wherein the conductive elastic body includes an elastic main body and a conductive cloth that covers the elastic main body,
the elastic body being formed in a band plate shape, and the conducting cloth covering an entirety of an outer surface of
the elastic main body.

US Pat. No. 9,438,141

BRAKING APPARATUS FOR ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. A braking apparatus for an electric power tool that causes a three-phase brushless motor provided in the electric power
tool and having three terminals to generate a braking force, the braking apparatus comprising:
a switching circuit comprising six switching elements, the six switching elements comprising:
a first set of three switching elements forming a high-side switch group provided on a positive side current conduction path
that connects the three terminals with a positive electrode side of a direct current power source so as to connect or disconnect
the positive side current conduction path; and

a second set of three switching elements forming a low-side switch group provided on a negative side current conduction path
that connects the three terminals with a negative electrode side of the direct current power source so as to connect or disconnect
the negative side current conduction path, and

each of the six switching elements including a diode connected in parallel thereto; and
a brake control unit configured such that during rotation of the three-phase brushless motor, upon receiving an input of one
of a stop command and a deceleration command of the electric power tool, the brake control unit controls an on/off state of
the three switching elements of the high-side switch group and an on/off state of the three switching elements of the low-side
switch group to cause a braking current to flow to the three-phase brushless motor, thereby generating the braking force,
and

wherein the brake control unit is further configured to switch any one selected switching element of the three switching elements
forming one selected switch group of the high-side switch group and the low-side switch group to the off state from the on
state at a timing at which the braking current flows through the diode connected in parallel to the selected switching element
upon turn-off of the selected switching element.

US Pat. No. 9,434,062

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a motor configured to rotate an output member about a rotation axis and linearly drive a tool in a direction of a longitudinal
axis of the tool to perform a hammering operation, the rotation axis extending in the direction of the longitudinal axis of
the tool;

a first housing to which the tool is attached at a first end of the first housing and which has a first cylindrical portion
at a second end, the first cylindrical portion having a longitudinal axis extending in the direction of the rotation axis;

a second cylindrical portion covering the first cylindrical portion and a grip portion extending from the second cylindrical
portion in a direction crossing the direction of the longitudinal axis of the tool, the second cylindrical portion being movable
relative to the first cylindrical portion, the first housing comprising a slide guide that guides the second housing to be
slid in contact with the slide guide in the direction of the longitudinal axis of the tool; and

a vibration reduction member which is provided between the first cylindrical portion and the second cylindrical portion such
that the vibration reduction member reduces the transmission of vibration between the first housing and the second housing
via elastic shearing deformation of the vibration reduction member to a greater effect than by axial deformation of the vibration
reduction member,

wherein a direction of the shearing deformation of the vibration reduction member corresponds to the direction of the rotation
axis, and

wherein the motor is entirely or partially housed in the first housing wherein a cooling air passage is formed by means of
a gap between the first cylindrical portion and the second cylindrical portion,

wherein the vibration reduction member is located at the cooling air passage and cooled by an air flowing through the cooling
air passage, which flowed by means of a cooling motor fan to cool the motor,

wherein the cooling motor fan is housed in the first housing together with the motor, and
wherein the second housing has a grip portion held by a user of the power tool, wherein the grip portion extends in a direction
crossing a longitudinal direction of the second housing from one end of the second cylindrical portion opposite to the first
end where the tool is attached and wherein a distal end of the grip portion is defined as a free end, wherein the cooling
motor fan is provided closer to the tool than the motor,

wherein the vibration reduction member is provided between the motor and the cooling motor fan.

US Pat. No. 9,364,968

CHAIN TENSION ADJUSTMENT DEVICE OF CHAIN SAW

MAKITA CORPORATION, Aich...

1. A chain saw having a chain tension adjustment device a guide bar with a saw chain wound around an outer circumference portion
of the guide bar, wherein the guide bar is moved in a longitudinal direction to adjust tension of the saw chain, the device
comprising:
a first mechanism that is rotated around an axis thereof by a manual operation and includes a first drive bevel gear formed
on an end opposite to an operation end;

a second mechanism that includes a first driven bevel gear formed on one end in an axial direction of the second mechanism
and engaged with the first drive bevel gear, and a second drive bevel gear formed on the other end in the axial direction;

a third mechanism that includes a second driven bevel gear formed on one end in an axial direction of the third mechanism
and engaged with the second drive bevel gear; and

a fourth mechanism that is linked to the third mechanism and the guide bar, and converts rotational motion rotating around
an axis of the third mechanism into motion in the longitudinal direction of the guide bar,

wherein the first to fourth mechanisms are disposed in a chain-saw main body on which the guide bar is mounted.

US Pat. No. 9,346,157

DRIVING TOOLS

MAKITA CORPORATION, Anjo...

1. A driving tool comprising:
a tool body;
a driver configured to drive a driven member;
a driver guide configured to guide the driver together with the driven member, the driver guide being movable with respect
to the tool body; and
a driven member holding mechanism configured to hold the driven member at a driving position inside the driver guide until
the driven member is driven by the driver and such holding of the driven member occurring independently of a movement of the
driver guide with respect to the tool body, wherein:
the driven member holding mechanism comprises an internally exposed member exposed inside the driver guide;
the internally exposed member is a separate member from the driver guide and does not move in conjunction with the movement
of the driver guide with respect to the tool body;

the internally exposed member includes a pressing surface against which the driven member is pressed by a feeding force that
feeds the driven member toward the driving position; and

the driven member pressed against the pressing surface is held at the driving position until the driven member is driven by
the driver and such holding of the driven member occurring independently of the movement of the driver guide with respect
to the tool body.

US Pat. No. 9,337,452

BATTERY PACKS AND SYSTEMS INCLUDING BATTERY PACKS AND ELECTRIC APPARATUS

MAKITA CORPORATION, Anjo...

1. A battery pack configured to be connectable with battery mount portions of a plurality of electric apparatuses, the battery
pack comprising:
a main connection section configured to be connectable with main connection complimentary sections of the battery mount portions
of the plurality of electric apparatuses as the main connection section is slid relative thereto in a direction; and

an auxiliary connection section configured to be connectable with an auxiliary connection complimentary section provided on
the battery mount portion of a specific kind of electric apparatus of the plurality of electric apparatuses, wherein:

the main connection section and the auxiliary connection section are configured such that the weight of the battery pack can
be supported at the main connection section and the auxiliary connection section when the battery pack is connected to the
battery mount portion of the specific kind of electric apparatus; and

the main connection section and the auxiliary connection section each comprise a pair of guide rails.

US Pat. No. 9,278,426

ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool, comprising:
a housing;
a motor accommodated in the housing so that an output shaft faces forward;
an operation member that is supported by the housing so that the operation member can be operated to move in a direction perpendicular
to the output shaft of the motor, and that turns on and off a drive switch of the motor;

a brake device that is provided on a front side of the motor in the housing to brake rotation of the output shaft; and
a cooperative mechanism that releases the brake device in response to a pushing operation of pushing the operation member
toward the housing to turn on the drive switch,

wherein the cooperative mechanism includes a slide member that is accommodated in the housing, and that is capable of sliding
toward the front side in response to the pushing operation of the operation member, and the slide member slides toward the
front side to release the brake device,

the operation member contacts with the slide member at a contact position which is located on a rear side of the motor, such
that the pushing operation of the operation member is changed to the sliding movement of the slide member at the contact position,
and

a first tilted surface is provided in the operation member at the contact position, and a rolling element that rolls on the
first tilted surface in the pushing operation is provided in the slide member at the contact position.

US Pat. No. 9,205,548

IMPACTING TOOL

MAKITA CORPORATION, Anjo...

1. An impacting tool having a tool bit configured to carry out an operation with linear movement in a longitudinal direction
to perform the prescribed processing operation on the workpiece, comprising;
a tool holder having a bit inserting hole that allows the tool bit to be inserted in the bit inserting hole, the tool holder
having a hole on an inner surface of the tool holder, and

a locking part that holds the tool bit inserted into the bit inserting hole so that the tool bit cannot be pulled out from
the bit inserting hole, a longitudinal length of the hole substantially corresponding to a longitudinal length of locking
part so that, when the locking part is disposed in the hole of the tool holder the locking part is restricted to move within
the hole in the longitudinal direction of the tool bit and the locking part is movable in a direction perpendicular to the
longitudinal direction of the tool bit;

wherein the locking part undergoes relative movement with respect to the tool holder in the direction perpendicular to the
longitudinal direction of the tool bit to allow to move between a bit holding position where the locking part is engaged with
the tool bit inserted in the bit inserting hole to restrain pulling of the tool bit from the bit inserting hole, and a bit
holding released position where the lock is released and the tool bit can be pulled out from the bit inserting hole, the locking
part not being able to move in the direction perpendicular to the longitudinal direction of the tool bit in the bit holding
position, and the locking part being able to move in the direction perpendicular to the longitudinal direction of the tool
bit in the bit holding released position;

wherein the locking part and the tool holder move together in the longitudinal direction of the tool bit while the locking
part is disposed in the hole of the tool holder, the locking part and the tool holder moving together in the longitudinal
direction of the tool bit between a bit anchored position where the locking part is set at the bit holding position to maintain
the locked state with respect to the tool bit and a bit connection and disconnection allowed position where the locking part
is set at the bit holding released position so that the lock can be released with respect to the tool bit.

US Pat. No. 9,154,062

ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:
a three-phase brushless motor configured to drive a tool; and
a motor driver configured to drive the three-phase brushless motor with square voltage waves, wherein the motor driver is
able to change a conduction angle among at least two values, the at least two values include a value that is equal to more
than 130 degrees but not more than 180 degrees, and the motor driver is configured to set the conduction angle to a larger
value as current flowing through the motor becomes smaller.

US Pat. No. 9,079,291

HAND-HELD TOOLS

MAKITA CORPORATION, Anjo...

1. A hand-held tool comprising:
a tool body having an electric motor disposed therein, the electric motor having a motor axis;
a gear head device mounted to the tool body and having a spindle and a gear mechanism, the gear mechanism being coupled to
the electric motor and transmitting rotation of the electric motor to the spindle, the spindle having a spindle axis;

a cover configured to cover at least a part of an end tool mounted to the spindle;
a coupling device coupling the cover to the gear head device, so that the cover can move relative to the gear head device;
a lock mechanism configured to lock and unlock a position of the cover relative to the gear head device; and
an operation member operably coupled to the lock mechanism and positioned on a side opposite to the coupling device of the
cover with respect to the motor axis;

wherein the lock mechanism includes a lock claw engaging the cover and fixing the cover in position relative to the end tool,
and a biasing member applying a biasing force to the lock claw in a direction toward a lock position, wherein the operation
member is operable to unlock the position of the cover against the biasing force of the biasing member; and

wherein the lock mechanism further includes a slider disposed on a rear side of the spindle and transmitting the lock and
unlock operations of the operation member to the lock claw, the slider having a relief portion through which an output shaft
of the electric motor extends.

US Pat. No. 9,073,228

CUTTING TOOLS

MAKITA CORPORATION, Anjo...

10. A cutting tool comprising:
a tool unit including:
an electric motor;
a fan; and
a rotary cutting blade, the fan and the rotary cutting blade being rotatably driven by the electric motor, and
a blower duct introducing a flow of air produced by the fan toward a cutting point where a workpiece is cut by the rotary
cutting blade, the blower duct being configured to blow the air toward the cutting point in a lateral direction parallel to
a rotational axis of the rotary cutting blade,

wherein the blower duct is mounted to a base via a supporting arm and comprises a wall that guides the air from the fan to
a cutting point of the rotary cutting blade via an opening in the supporting arm,

wherein the opening is formed to extend through the supporting arm, and
wherein the opening of the supporting arm directly faces an outer circumferential edge of the rotary cutting blade in a direction
parallel to the rotational axis of the rotary cutting blade in such a way that there is no obstruction between the opening
of the supporting arm and the outer circumferential edge of the rotary cutting blade in the direction parallel to the rotational
axis of the rotary cutting blade.

US Pat. No. 9,045,270

CAULKING GUNS

MAKITA CORPORATION, Anjo...

1. An electric caulking gun comprising:
an electric motor having an output shaft extending in a left and right direction;
a gear mechanism coupled to the output shaft of the electric motor and including a drive gear, the drive gear having a gear
axis extending in the left and right direction;

a push rod coupled to the drive gear of the gear mechanism, so that the push rod moves forward and backward as the electric
motor is driven;

a main body portion configured to accommodate therein the electric motor and the gear mechanism;
a handle portion disposed on a lower side of the main body portion; and
a battery pack disposed below the handle portion;
wherein the push rod is centrally located within the main body portion with respect to the left and right direction;
wherein the electric motor is weight balanced with respect to the push rod with respect to the left and right direction;
wherein the gear mechanism is disposed on a front side of the electric motor; and
wherein the electric motor and the gear mechanism are disposed directly below the push rod.

US Pat. No. 9,537,335

ADAPTER FOR POWER TOOLS, POWER TOOL SYSTEM AND METHOD FOR WIRELESSLY COMMUNICATING MAINTENANCE INFORMATION THEREFOR

MAKITA CORPORATION, Anjo...

1. A power tool system comprising:
a power tool having a housing and a battery pack interface,
a battery pack connected to the battery pack interface, and
first and second adapters each configured to provide a different electrical function to the power tool by being connected
to the power tool,

wherein the first and second adapters are physically engageable with only the housing of the power tool in place of each other
and the battery pack does not contain any means for physically engaging the first and second adapters,

wherein the first adapter comprises:
means for detachably connecting to only the power tool,
an adapter controller,
at least one memory and/or storage device in communication with the adapter controller and configured to store maintenance
information concerning the power tool and/or the battery pack, the maintenance information including a unique identifier of
the battery pack and/or the power tool,

at least one communication port configured to transmit electrical communications, including said maintenance information,
from the adapter controller to a controller located in the power tool and vice versa, and

means for wirelessly communicating the maintenance information to an external device, wherein the first adapter is configured
to enable the external device to access maintenance information stored in the adapter,

wherein the second adapter comprises means for detachably connecting to only the housing of the power tool and does not contain
any means for wireless communication; and

the second adapter is configured to enable the power tool to be electrically connected to a charger for the battery pack such
that charging current is conducted from the charger to the battery pack via the second adapter and the power tool.

US Pat. No. 9,537,336

BATTERY SYSTEM FOR A POWER TOOL, AS WELL AS BATTERY HOLDER THEREFOR, CHARGER, AND CHARGING SYSTEM

MAKITA CORPORATION, Anjo...

1. A battery system for a power tool, comprising:
two or more battery packs each having a positive battery terminal and a negative battery terminal;
at least one battery holder adapted to detachably engage the two or more battery packs; and
a charger adapted to detachably engage the battery holder and having a plurality of battery interfaces each adapted to simultaneously
electrically communicate with one of the two or more battery packs while the at least one battery holder engages both the
charger and the battery packs,

wherein each battery interface comprises a positive charging output terminal and a negative charging output terminal adapted
to conduct charging current to the corresponding positive and negative battery terminals of each of the two or more battery
packs,

wherein the plurality of battery interfaces are adapted to simultaneously electrically communicate with the positive battery
terminal and the negative battery terminal of each of the two or more battery packs when the two or more battery packs are
engaged with the battery holder, and

wherein the plurality of battery interfaces are adapted to simultaneously electrically communicate with the positive battery
terminal and the negative battery terminal of each of the two or more battery packs when the two or more battery packs are
not engaged with the battery holder and the battery holder is not engaged with the charger.

US Pat. No. 9,502,699

BATTERY PACK INCLUDING A SHOCK ABSORBING DEVICE AND ARRANGEMENT OF CIRCUIT BOARDS

MAKITA CORPORATION, Anjo...

1. A battery pack for an electric tool comprising:
a housing;
a battery cell received within the housing, the battery cell having an axial direction and a first end surface and a second
end surface opposite each other in the axial direction;

a first circuit board configured to be connected to the electric tool or a battery charger; and
a second circuit board electrically connected to the first circuit board;
wherein the first circuit board is disposed on a lateral side of the batter cell in a direction perpendicular to the axial
direction, and the second circuit board extends in a direction intersecting the axial direction of the battery cell.

US Pat. No. 9,490,506

BATTERY UNIT

MAKITA CORPORATION, Anjo...

1. A battery unit comprising:
a plurality of cell assemblies, each of the plurality of cell assemblies having a positive electrode, a negative electrode,
and an assembled battery, the assembled battery having a plurality of battery cells that are connected in one of series, parallel,
and series-parallel to each other;

a positive electrode connection terminal that is connected to the positive electrode of each of the plurality of cell assemblies;
a negative electrode connection terminal that is connected to the negative electrode of each of the plurality of cell assemblies;
a plurality of switch sections, each of the plurality of switch sections corresponding to one of the plurality of cell assemblies,
and being configured to conduct or block a current path between the positive electrode of the corresponding cell assembly
and the positive electrode connection terminal;

a control section that is configured to selectively output an on-command signal for conducting the current path to each of
the plurality of switch sections;

a simultaneous on-suppression section that is configured, when the on-command signal is output from the control section to
at least two of the plurality of switch sections, to perform one of (i) enabling the on-command signal to only one of the
at least two switch sections and (ii)disabling the on-command signal to all of the at least two switch sections, so as to
suppress the at least two switch sections from being simultaneously turned on and to suppress positive electrodes of at least
two of the plurality of cell assemblies corresponding to the at least two switch sections from being simultaneously connected
to the positive electrode connection terminal.

US Pat. No. 9,475,140

CUTTING DEVICE

MAKITA CORPORATION, Anjo...

1. A cutting device comprising:
a base that is brought into contact with an upper surface of a workpiece; and
a cutting device main body that is supported on an upper surface side of the base and includes a circular cutting blade that
is rotated by an electric motor, the circular cutting blade for cutting into the workpiece protruding toward a lower surface
side of the base, wherein,

a wind shielding portion is provided to cross between a marking line guide provided on a front portion of the base and the
cutting blade; and

a ventilation portion that guides air produced by a rotation of the electric motor in a forward direction, the ventilation
portion being positioned at a front side of the cutting blade, the ventilation portion guiding the air produced by the rotation
of the electric motor toward the marking line guide;

wherein the wind shielding portion consists of a right wall portion and a left wall portion positioned on a right side and
a left side, respectively, with respect to a plane defined by the cutting blade; and

an opening serving as the ventilation portion is provided between the wall portions; the opening being formed to be open at
an upper side which is opposite to a lower side adjacent to the base.

US Pat. No. 9,463,566

AUXILIARY HANDLE AND RECIPROCATING POWER TOOL HAVING THE SAME

MAKITA CORPORATION, Anjo...

1. An elongate auxiliary handle, which is removably attached to a reciprocating power tool in which a tool bit is caused to
reciprocate in a predetermined direction, the auxiliary handle comprising:
a mounting part that is attached to a power tool body,
a movable part that is movable with respect to the mounting part, and
a connection part that connects the mounting part and the movable part, wherein:
the movable part has a grip part which is held by a user and a base which is disposed between the grip part and the connection
part in a longitudinal direction of the auxiliary handle,

when the auxiliary handle is attached to the power tool body such that the longitudinal direction of the auxiliary handle
crosses the predetermined direction, (i) the movable part is held so as to be movable in the predetermined direction with
respect to the mounting part with the connection part as a fulcrum, (ii) the connection part and the grip part are disposed,
in the longitudinal direction, on opposite sides of a drive axis of the tool bit extending in the predetermined direction,
and (iii) the connection part has smaller bending rigidity in the predetermined direction than the mounting part and the movable
part, and

the movable part is caused to move with respect to the mounting part by elastic deformation of the connection part.

US Pat. No. 9,425,730

APPARATUS FOR ESTIMATING QUANTITY OF STATE RELATING TO MOTOR, AND ELECTRIC TOOL

MAKITA CORPORATION, Anjo...

1. An apparatus for estimating a quantity of state relating to a motor, comprising:
a motor model that includes at least inputs comprising a voltage applied to the motor and a torque acting on the motor, and
an output comprising a current flowing through the motor;

a comparator that calculates a difference between the current in an actual motor and the current output from the motor model;
and

an amplifier that amplifies an output of the comparator at a predetermined gain,
wherein:
the voltage in the actual motor is input into the motor model,
the motor model calculates the current output based on the voltage and torque inputs by performing a numerical calculation
not including a differentiation operation, and

an output of the amplifier is set as an estimated value of the torque in the actual motor and is input into the motor model.

US Pat. No. 9,337,453

BATTERY PACK FOR USE WITH HAND-HELD ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. A battery pack adapted for use with a hand-held, electric power tool, comprising:
a housing comprised of a rigid material, the housing containing a cooling air passage therein, which is in gaseous communication
with the outside environment, and at least one isolated space, which is isolated from the cooling air passage,

at least one isolating wall disposed inside the housing so as to physically separate and isolate the cooling air passage from
the at least one isolated space, and

a plurality of battery cells disposed within the housing such that an end portion thereof is disposed within the at least
one isolated space and an intermediate portion thereof is disposed adjacent the cooling air passage, a plurality of first
portions of the at least one isolating wall respectively contacting the plurality of battery cells,

wherein:
at least the plurality of first portions is comprised of a material that is more flexible and/or elastic than the rigid material
of the housing,

the housing is comprised of an upper half and a lower half, and
a seal comprised of a material that is more flexible and/or elastic than the rigid material of the housing is disposed at
least partially within the at least one isolated space and at least partially along a joint of the upper half and the lower
half.

US Pat. No. 9,278,427

DUST COLLECTION COVER OF DISK GRINDER

MAKITA CORPORATION, Anjo...

1. A dust collection cover of a disk grinder comprising a spindle rotated by an electric motor disposed within a tool main
body section, and a grinding tool attached to the spindle, the spindle being attached to a case that rotatably supports the
spindle, the dust collection cover comprising:
an auxiliary cover arranged detachably from a cover main body enabling a portion of the grinding tool to protrude from the
cover main body,

wherein the cover main body and the auxiliary cover are molded from synthetic resin,
wherein a cup-shaped grinding tool having a large height dimension with respect to a height dimension between an attachment
portion to the spindle and a grinding portion that contacts a material to be ground, is attachable to the spindle, a tool
having a small height dimension is not attachable to the spindle due to an attachment restricting portion integrated with
the cover main body and protrudes downward from a lower surface of the cover main body,

wherein the cover main body includes a radially extending wall portion and a circumferential wall portion,
wherein the radially extending wall portion has a substantially annular shape about an axis of the spindle and includes a
mount portion configured to be mounted to the case,

wherein the circumferential wall portion extends downward from the outer circumference of the radially extending wall portion
and configured to cover the cup-shaped grinding tool from a radially outer side, and

wherein the attachment restricting portion extends downward from a lower surface of the radially extending wall portion at
a position spaced from the circumferential wall portion in a direction radially inward therefrom.

an attachment base attachable to the case, and
a receiving base configured to support the cover main body such that the cover main body is held between the attachment base
and the receiving base;

wherein the attachment restricting portion extends along a circumference of the receiving base, and
wherein the attachment restricting portion has a shape substantially conforming to a shape of an outer circumferential edge
of the receiving base, so that the attachment restricting portion extends along the outer circumferential edge of the receiving
base when the cover main body is held between the attachment base and the receiving base.

US Pat. No. 9,261,171

BELT DRIVE FOR A MOTOR-DRIVEN TOOL

MAKITA CORPORATION, Aich...

1. A belt drive for a motor-driven tool, comprising:
a work-side belt pulley;
a tool-side belt pulley;
a belt tensioned over the work-side belt pulley and the tool-side belt pulley;
a cam, rigidly connected to a shaft, arranged in of the work-side belt pulley and the tool-side belt pulley, the cam having
a circular shape defined by an outer circumferential surface and a guide that projects from the outer circumferential surface,

wherein the guide is configured to guide the cam in the one of the work side belt pulley and the tool-side belt pulley, and
whereby during a rotating movement of the shaft the one of the work-side belt pulley and the tool-side belt pulley is movable
via the cam from an eccentric arrangement with regard to the shaft into a concentric arrangement by a translational and a
rotational movement of the one of the work-side belt pulley and the tool-side belt pulley.

US Pat. No. 9,248,566

TOOL HOUSING CASE AND SUBCASE

Makita Corporation, Anjo...

1. A tool housing case comprising:
a main body case comprising a tool housing main body configured to hold a tool and a cover for opening and closing the tool
housing main body; and

a subcase connectable to the main body case at a side of the main body case, wherein
the main body case comprises a handle configured to be gripped by a hand;
the subcase comprises an accessory holding body configured to hold an accessory and an accessory opening and closing part
for opening and closing an opening in the accessory holding body; and

the side is a same side of the main body case as a side of the main body case to which the handle is attached.

US Pat. No. 9,166,417

CHARGER

MAKITA CORPORATION, Anjo...

4. A charger comprising a plurality of battery connection parts, the charger configured such that a battery pack can be charged
by connecting the battery pack to respective one of the battery connection parts, wherein:
each battery connection part includes an indicator;
an indicator on a first battery connection part is displayed differently from an indicator on a second battery connection
part when charging by use of the first battery battery connection part;

an indication state of the indicator on the first battery connection part is different from that of the indicator on the second
battery connection part by changing a blink frequency of an illuminant that is used in the indicators;

one blink frequency of an indicator is equal to an integral multiple of a blink frequency of a different indicator; and
timing of a start of an illumination of each indicator is configured to be the same for all of the indicators.

US Pat. No. 9,114,491

DRIVING SOURCE SUPPLY SYSTEM OF POWER TOOL AND ATTACHMENT DEVICE

MAKITA CORPORATION, Anjo...

1. A driving source supply system for an attachment device-equipped electric power tool, the driving source supply system
supplying a driving source to an attachment device from an electric power tool which is equipped with a battery as a driving
source and to which the attachment device is joined, the driving source supply system comprising:
a male terminal formed on one of the electric power tool and the attachment device so as to protrude therefrom;
a plug-in port provided in the other of the electric power tool and the attachment device and into which the male terminal
is insertable; and

a female terminal formed in the other of the electric power tool and the attachment device, located inside the plug-in port,
and electrically connectable to the male terminal; wherein

a driving source is supplied from the battery to the attachment device by electrically connecting the male terminal to the
female terminal when the attachment device is joined to the electric power tool,

the other of the electric power tool and the attachment device in which the female terminal is formed is provided with a shutter
capable of sliding between an open position and a closed position of the plug-in port, a rotary member capable of rotating
through engagement of one end thereof with the shutter, and urging means urging the rotary member in a rotational direction
such that the shutter slides to the closed position;

the one of the electric power tool and the attachment device on which the male terminal is formed is provided with a press
member coming into abutment on the other end of the rotary member when the attachment device is mounted to rotate the rotary
member, against urging of the urging means, in a rotational direction such that the shutter slides to the open position, and

driving of the attachment device is interlocked with driving of the electric power tool.

US Pat. No. 9,073,186

ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. An electric power tool comprising:
a motor configured to rotationally drive a rotational shaft, on which a tool element can be mounted;
a current detection unit configured to detect a motor current flowing through the motor;
an operating portion that is operated to input a command that is used to cause the motor to operate, the operating portion
configured to be operated a varied amount proportional to a desired speed of the motor;

a torque setting portion configured to set a torque in accordance with one of a plurality of predetermined torque settings;
a current threshold setting unit that sets a current threshold, which is an upper limit of the motor current, based at least
in part on the set torque; and

a control unit that drives the motor in accordance with the varied amount of operation of the operating portion, and stops
driving of the motor when the motor current detected by the current detection unit reaches the current threshold set by the
current threshold setting unit,

wherein the current threshold setting unit sets the current threshold, after the control unit has started driving of the motor,
such that (i) the current threshold is set to a first value when a predetermined first period of time elapses after the control
unit has started driving of the motor, (ii) the current threshold subsequently decreases from the first value so that the
current threshold reaches to a constant value when a predetermined second period of time elapses after the control unit has
started driving of the motor, and, (iii) the current threshold is maintained at a fixed value of the constant value after
the current threshold is decreased to the constant value, the first value being larger than the constant value and the constant
value corresponding to the set torque.

US Pat. No. 9,073,197

VIBRATION REDUCTION HANDLE AND POWER TOOL

MAKITA CORPORATION, Anjo...

1. A vibration reduction handle comprising:
an attachment portion attachable to a power tool;
a grip portion which extends in a first direction defined as a longitudinal direction of the grip portion and is pivotably
movable in a second direction crossing the first direction; and

a first ring-shaped elastic member and a second ring-shaped elastic member which are respectively provided between the attachment
portion and the grip portion,

wherein the attachment portion has a grip connecting portion which engages with the grip portion and has a first wall,
wherein the grip portion has an attachment connecting portion which engages with the attachment portion and has a second wall,
wherein one component among the grip connecting portion and the attachment connecting portion is disposed inside an other
component, and the first wall and the second wall face to each other, and said one component has a flange which protrudes
along the second direction toward the other component, and the other component has a third wall which faces respectively both
surfaces of the flange with respect to the first direction,

wherein the first elastic member and the second elastic member are respectively disposed at both sides of the flange with
respect to the first direction and clamped by the first wall and the second wall in the second direction and clamped by the
flange and the third wall in the first direction,

wherein the grip portion includes a pivot against the attachment portion disposed between the first elastic member and the
second elastic member with respect to the first direction.

US Pat. No. 9,056,379

POWER TOOL DUST COLLECTING DEVICE AND POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool dust collecting device, the dust collecting device comprising:
a casing mountable to a power tool;
a cylindrical suction head that is provided so as to protrude from the casing, allows a tip end tool of the power tool to
penetrate while in contact with a workpiece surface, and is connected at a circumferential surface to the casing such that
an axis is directed in a front-rear direction;

a dust collecting path that is formed in the casing so that air is sucked in from the suction head and introduced into the
casing;

a filter that is provided on the dust collecting path and capable of capturing dust sucked in together with the air;
a blocking ring that is provided on a front surface of the suction head and subject to elastic deformation upon contact with
the workpiece surface for blockage between the suction head and the workpiece surface; and

a ventilating portion that is formed in the blocking ring to ensure a flow of air into the suction head regardless of whether
the elastic deformation has occurred.

US Pat. No. 10,058,926

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool, which performs a prescribed operation on a workpiece by driving a tool accessory, comprising:a motor;
a tool accessory driving shaft that is arranged in parallel to a rotation axis of the motor and is driven by the motor to drive the tool accessory;
a body housing that houses at least part of the tool accessory driving shaft and the motor, wherein a first portion of the body housing that houses at least part of the tool accessory driving shaft is fixed relative to a second portion of the body housing that houses the motor, the body housing including a partition wall separates the first portion and the second portion;
a tool accessory holding member that can move between a clamp position to clamp the tool accessory between the tool accessory holding member and the tool accessory driving shaft in order to hold the tool accessory and a release position to release the clamping of the tool accessory in order to remove the tool accessory, and
a holding mechanism for holding the tool accessory holding member in the clamp position, wherein:
the holding mechanism includes an engagement member that can engage with the tool accessory holding member in the clamp position, and a biasing member that biases the engagement member so as to provide the engagement member with a force of holding the tool accessory holding member in the clamp position, and
the engagement member is disposed within the body housing.

US Pat. No. 9,853,586

MOTOR DRIVEN APPLIANCE

MAKITA CORPORATION, Anjo...

1. A motor driven appliance comprising:
a battery;
a motor driven by electric power of the battery;
at least one switch comprising an trigger switch for driving the motor, the trigger switch operating a driving switch and
a power switch to thereby control output of battery voltage from the battery;

a control unit configured to control driving of the motor by controlling power supply from the battery to the motor when the
trigger switch is turned on;

an abnormality detection unit configured to detect an abnormality of the motor driven appliance;
a determination unit configured, when an abnormality is detected by the abnormality detection unit, to perform an abnormality
type determination process of determining whether the abnormality is a first type abnormality or a second type abnormality,
the first type abnormality being an abnormality, a state of which detected by the abnormality detection unit is cleared when
the trigger switch is switched from on to off, and the second type abnormality being an abnormality, a state of which detected
by the abnormality detection unit is not cleared just because the trigger switch is switched from on to off; and

a processing unit configured to perform a process when it is determined that the abnormality detected by the abnormality detection
unit is the second type abnormality by the determination unit, and not to perform the process when it is determined that the
detected abnormality is the first type abnormality.

US Pat. No. 9,630,310

ELECTRIC TOOL

MAKITA CORPORATION, Anjo...

1. An electric tool comprising:
a main tool body with a front portion and a rear portion positioned opposite to the front portion wherein the main tool body
houses a motor configured to receive electricity to be driven;

a gear head coupled with the front portion of the main tool body wherein the gear head has a spindle in communication with
a motor axis of the motor via mesh-engagement of bevel gears associated with the motor axis wherein the spindle has a cutter
tool accessory attached thereto and further wherein rotation of the motor axis produces a commensurate rotation of the cutter
tool accessory;

a plurality of battery attachment portions associated with the rear portion of the main tool body wherein the plurality of
battery attachment portions is configured to receive a corresponding set of batteries which provide electricity to power the
motor;

a support protrusion integrally formed with the main tool body to extend outwardly from the main tool body; and
a leg associated with the rear portion of the electric tool wherein the leg is tiltably connected to the support protrusion
such that the leg tilts to be positioned at an angle relative to the main tool body.

US Pat. No. 9,506,486

FASTENING ARRANGEMENT, PORTABLE WORKING TOOL AND METHOD OF FASTENING A FIRST HOUSING SECTION TO A SECOND HOUSING SECTION

MAKITA CORPORATION, Aich...

1. A fastening arrangement for fastening a first housing section to a second housing section of a portable working tool, the
fastening arrangement comprising:
a bolt, which at least in sections has an external thread,
an internal nut, which at least in sections has an internal thread, wherein the internal thread of the internal nut engages
in the external thread of the bolt, and

an external nut, which is connected to the internal nut in such a way that the internal nut is held in the external nut in
a displaceable manner, wherein, during a rotational movement of the external nut the internal nut follows the rotational movement
of the external nut and the internal nut performs an axial movement relative to the external nut along a longitudinal axis
of the bolt, wherein

the internal nut is configured to protrude from the external nut to provide a free end of the fastening arrangement in a direction
of the longitudinal axis of the bolt.

US Pat. No. 9,496,531

BATTERY DEVICES

MAKITA CORPORATION, Aich...

1. A battery carrier configured to be mounted to a tool body of an electric tool for supplying electric power to the tool
body, comprising:
a plurality of battery mount sections arranged in a juxtaposed relationship, that are recessed from an upper surface of the
battery carrier, each battery mount section being configured to hold a battery that has a length along a longitudinal direction,
the length of each battery being substantially the same; and

an enclosure arranged at an end of the battery carrier and extending in a direction intersecting the longitudinal direction
of the batteries, the enclosure projecting from the upper surface of the battery carrier such that the enclosure and the upper
surface of the battery carrier define an L-shape in a side view of the battery carrier, wherein

when batteries are mounted on the battery mount sections, the batteries are spaced from each other and from the enclosure
so as to define a space configured to allow a user to grasp each of side surfaces of the batteries to permit removal of the
batteries from the battery mount sections, and longitudinal axes of the respective batteries mounted to the battery mount
sections extend substantially parallel to each other.

US Pat. No. 9,463,563

IMPACT TOOL

MAKITA CORPORATION, Anjo...

1. An impact tool which is configured to perform a hammering operation on a workpiece by at least linear movement of a tool
bit in an axial direction of the tool bit, comprising:
a driving mechanism for driving the tool bit,
a housing part that forms a housing space in which at least part of the driving mechanism is disposed,
a cover plate member that is provided in the housing space,
a through hole that is provided in the cover plate member, and
a switching member for switching a drive mode of the impact tool, wherein:
the switching member has an operating member that is configured to be operated by a user for mode switching, and a biasing
member that is disposed between the operating member and the housing part and biases the operating member so as to hold the
operating member in a selected position, the biasing member being disposed in the housing space,

the operating member includes a switching dial, an upper flanged cylinder and a lower flanged cylinder,
the cover plate member is sandwiched between the upper flanged cylinder and the lower flanged cylinder through the through
hole, and

the upper flanged cylinder and the lower flanged cylinder are connected to each other such that the upper flanged cylinder
and the lower flanged cylinder are prevented from coming off from the cover plate member and can rotate around a rotation
axis.

US Pat. No. 9,434,063

HANDLE PORTION OF HAND-HELD ELECTRIC TOOL

MAKITA CORPORATION, Anjo...

1. A hand-held type electric tool comprising:
a tool main body extending in a forward and rearward direction;
a handle housing extending downward from the tool main body;
a chuck disposed on a front side of the tool main body;
a switch lever disposed on the handle housing; and
a rechargeable type battery pack; wherein:
the handle housing is configured to receive at least a part of the rechargeable type battery pack:
the rechargeable type battery pack includes three battery cells and a battery case;
the three battery cells include one battery cell and two battery cells arranged on a rear side of the one battery cell;
the battery case includes a cover portion which is attached to a lower end portion of the handle housing and a fixation claw
portion, wherein the fixation claw portion can be used to attach the rechargeable type battery pack to the handle housing
and the fixation claw portion is arranged so as to be capable of being grasped by the user;

the handle housing has a substantially triangular cross sectional configuration such that the handle housing has i) an apex
portion disposed on a front side of the handle housing and ii) a base portion disposed on a rear side of the handle housing,

the lower end portion of the handle housing has an outer shape that substantially conforms to an outer shape of the cover
portion of the battery case,

in the substantially triangular cross sectional configuration, a maximum dimension of the handle housing in a direction perpendicular
to the forward and rearward direction is located on a front side of a maximum dimension of the battery case where the two
battery cells are disposed, and

the fixation claw portion is located between the one battery cell and one of the two battery cells in the forward and rearward
direction.

US Pat. No. 9,364,125

BACKPACK POWER APPARATUS

MAKITA CORPORATION, Aich...

1. A backpack power apparatus, comprising:
a back carrier frame for being piggybacked by a user;
a blower including a fan driven by a drive motor for sucking in or blowing out air through an airflow duct, the blower being
mounted on the back carrier frame via a vibration isolator;

an airflow tube fluidically communicating with the airflow duct of the blower for sucking in or blowing out air through the
airflow tube, the airflow tube being adapted for being held and operated by the user when in use; and

a support connected to the airflow tube and the back carrier frame so as to support the airflow tube on the back carrier frame,
the airflow tube having a proximal end and the airflow duct having a distal end, and wherein the support supportingly holds
the airflow tube on the back carrier frame such that the proximal end of the airflow tube does not contact the distal end
of the airflow duct.

US Pat. No. 9,339,923

POWER TOOL

MAKITA CORPORATION, Anjo...

1. An impact tool, which causes a tool bit to perform striking movement in an axial direction of the tool bit and rotation
around an axis of the tool bit, thereby causing the tool bit to perform a predetermined operation on a workpiece, comprising:
a tool body,
a motor that is housed in the tool body and drives the tool bit,
an impact drive mechanism configured to drive the tool bit by impact,
a rotary drive mechanism configured to rotationally drive the tool bit,
an impact drive shaft that is rotationally driven by the motor and drives the impact drive mechanism, and
a rotary drive shaft that is rotationally driven independently of the impact drive shaft by the motor and drives the rotary
drive mechanism, and

a clutch that is disposed upstream of the rotary drive mechanism in a path of transmitting torque of the motor to the tool
bit, and transmits torque of the motor to the rotary drive mechanism, while interrupting the torque transmission when the
torque acting on the tool body around an axis of the tool bit exceeds a predetermined torque,

wherein the impact drive shaft and the rotary drive shaft are coaxially disposed, and the clutch is disposed on the rotary
drive shaft.

US Pat. No. 9,337,677

ELECTRIC POWER TOOL POWERED BY BATTERY PACK AND ADAPTER THEREFOR

MAKITA CORPORATION, Anjo...

1. An adapter for connecting a main body of an electric power tool and at least one battery pack to each other, the adapter
comprising:
a connecter portion configured to be detachably attached to the main body of the power tool;
at least one battery receiving portion each configured to be detachably attached to any one of first and second battery packs
alternatively, the first battery pack being configured to output an alarm signal when the first battery pack is in a predetermined
condition and the second battery pack being configured not to output the alarm signal even when the second battery pack is
in the predetermined condition;

a power supply circuit configured to electrically couple the first battery pack or the second battery pack attached to the
battery receiving portion to the main body of the electric power tool attached to the connecter portion;

a measuring portion configured to measure an index corresponding to a charged level of the first battery pack or the second
battery pack attached to the battery receiving portion;

a signal receiving portion configured to receive the alarm signal outputted from the first battery pack attached to the battery
receiving portion; and

a controller portion configured to:
detect which one of the first and second battery packs is attached to the battery receiving portion when the first or second
battery pack is attached to the battery receiving portion,

allow power supply through the power supply circuit regardless of the index measured by the measuring portion, while the first
battery pack is attached to the battery receiving portion and the signal receiving portion does not receive the alarm signal,

stop or restrict the power supply through the power supply circuit when the signal receiving portion receives the alarm signal,
and

stop or restrict the power supply through the power supply circuit based upon the index measured by the measuring portion
while the second batter pack is attached to the battery receiving portion.

US Pat. No. 9,314,913

DUST COLLECTING DEVICE AND IMPACT TOOL

MAKITA CORPORATION, Anjo...

1. A dust collecting device that is attached to an impact tool and collects dust generated by the impact tool in which a tool
bit coupled to a front end region of a tool body is caused to rectilinearly move in an axial direction of the tool bit, comprising:
a dust suction port through which dust is sucked up and which can be adjusted in position in the axial direction of the tool
bit according to a length of the tool bit in the axial direction,

a dust collecting part having the dust suction port at its front end,
a dust transfer part which is connected to the dust collecting part in order to transfer dust downstream from the dust suction
port, the dust transfer part comprising a dust collecting hose which extends in the axial direction of the toll bit and has
a bellow-like part formed at least in part of the dust collecting hose, and

a hose holding part which can be mounted to the tool body and engaged with the bellow-like part so as to hold the dust collecting
hose on the tool body,

wherein the position of the dust suction part in the axial direction of the tool bit can be adjusted by changing as engagement
position of the bellow-like part in an axial direction with respect to the hose holding part.

US Pat. No. 9,308,637

POWER TOOL

MAKITA CORPORATION, Aich...

1. A power tool comprising:
a tool; and
a main body configured to activate the tool by using a prime mover;
wherein the main body comprises:
a first unit configured to attach the tool;
a second unit rotatably coupled with the first unit and provided with a handle to be gripped by a user;
a start operation member configured to be operated by the user between a start position and a stop position;
a start cooperative switch disposed on a supply circuit for supplying energy to the prime mover, and configured to enable
the supply circuit when the start operation member is at the start position and cut off the supply circuit when the start
operation member is at the stop position;

a lock operation member configured to be operated by the user between a lock position and an unlock position, and configured
to prevent rotation of the second unit with respect to the first unit at the lock position and allow the rotation of the second
unit with respect to the first unit at the unlock position;

a lock cooperative switch disposed on the supply circuit, and configured to enable the supply circuit when the lock operation
member is at the lock position and cut off the supply circuit when the lock operation member is at the unlock position; and

an interlock mechanism configured to allow the start operation member to move to the start position even when the lock operation
member is at the unlock position, and prevent the lock operation member from moving to the lock position when the start operation
member is at the start position,

wherein the interlock mechanism is further configured to prevent the lock operation member from moving from the lock position
to the unlock position when the start operation member is at the start position.

US Pat. No. 9,151,213

INTERNAL COMBUSTION ENGINE, IN PARTICULAR TWO-STROKE INTERNAL COMBUSTION ENGINE

MAKITA CORPORATION, Aich...

1. An internal combustion engine comprising:
a crankcase;
a cylinder;
a piston guided in the cylinder and configured to perform a stroke movement and to movably define a combustion chamber;
at least one transfer channel arranged in the cylinder and configured to transfer an ignition mixture from the crankcase into
the combustion chamber; and

at least one counter body, wherein
the piston includes a lower piston edge, which interacts with the at least one counter body such that an inlet cross section
of the at least one transfer channel that receives the inflow of the ignition mixture from the crankcase can be controlled
by the lower piston edge during the stroke movement of the piston, and

at least one of a reduction and a closing of the inlet cross section of the at least one transfer channel is effected by the
interaction of the lower piston edge with the at least one counter body when the stroke movement of the piston reaches one
of a bottom dead center position and an area of the bottom dead center position.

US Pat. No. 9,112,292

TERMINAL STRUCTURE

MAKITA CORPORATION, Anjo...

1. A terminal structure, comprising a male terminal and a female terminal, wherein the female terminal includes at least one
set of elastic plate parts, the terminal structure configured such that the male terminal is inserted between the at least
one set of elastic plate parts of the female terminal in a predetermined insertion direction to cause each side surface of
the male terminal to be pressed by the elastic plate parts due to the elastic force of the elastic plate parts, whereby the
male terminal and the female terminal are electrically connected to each other, wherein:
the male terminal has a plate-like shape and is configured to come into contact with the female terminal on a first side surface
and a second side surface of the male terminal, the first side surface and the second side surface of the male terminal facing
away from each other; and

first and second positions of the first side surface of the male terminal with which first and second contact parts of the
first elastic plate part are held in contact with are offset from third and fourth positions of the second side surface of
the male terminal with which third and fourth contact parts of the second elastic plate part are held in contact with, such
that the third and fourth positions of the male terminal are within the first and second positions of the male terminal in
the insertion direction of the male terminal.

US Pat. No. 9,850,915

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a main body housing;
an electric motor;
a fan driven by the electric motor, the fan comprising:
a base plate;
a shielding plate spaced from the base plate, the shielding plate defining a central inlet hole; and
a plurality of blades extending between the base plate and the shielding plate, the plurality of blades being at uneven pitches,
each blade comprising:

a blade body with an inner and an outer end, each blade body that extends from the inner end to the outer end thereof having
the same height from the base plate; and

an inducer extending from the inner end of the blade body inwardly into the inlet hole of the shielding plate, each inducer
configured to have decreasing height from the base plate in such a manner that each inducer has a different surface area with
each other;

a fan case comprising a peripheral wall encasing the fan therein;
a handle for a user to hold provided in the main body housing; and
a vibration absorber disposed on the peripheral wall of the fan case, wherein:
the fan case is supported by the main body housing only via the vibration absorber, the electric motor being secured at one
end to the fan case, and

the vibration absorber absorbs vibration caused by unstable outflow from the fan which may be caused by the uneven pitches
between the blades.

US Pat. No. 9,802,306

IMPACT TOOL

MAKITA CORPORATION, Anjo...

1. An impact tool, which performs a predetermined operation by driving a tool accessory at least in an axial direction of
the tool accessory, comprising:
a driving mechanism that drives the tool accessory,
a motor that drives the driving mechanism,
a tool body that houses the driving mechanism and the motor,
a handle, and
a current supply cable that is installed on the handle and is provided to supply current to the motor, wherein:
the handle has a handle body that is mounted to the tool body, and a pair of grips that extend in a direction crossing the
axial direction of the tool accessory and are designed to be held by user's right and left hands,

the handle body has a first part to which the grips are fastened and a second part that is fastened to the tool body and to
which the first part is connected so as to be movable with respect to the second part,

the first part is connected to the tool body via an elastic member and is allowed to move with respect to the tool body and
the second part while being biased by an elastic force of the elastic member, and

the current supply cable is installed on the second part of the handle.

US Pat. No. 9,614,203

BATTERY PACK FOR ELECTRIC POWER TOOL

MAKITA CORPORATION, Anjo...

1. A battery pack for an electric power tool that is detachably mounted on a tool body of the electric power tool for serving
as a power source for the electric power tool, the battery pack comprising: a case; battery cells that have a columnar shape;
and a cell holder that is inserted into the case, the cell holder covering at least a part of the battery cells, wherein:
the cell holder is provided with cell holding portions that come into contact with columnar outer peripheral surfaces of the
battery cells to pinch the outer peripheral surfaces of the battery cells and hold the battery cells;

a contact diameter of the cell holding portions is configured to be smaller than the diameter of the columnar outer peripheral
surface of the battery cell;

each cell holding portion has one contact-curved portion that has a curved shape and comes into contact with the columnar
outer peripheral surface of the battery cell, and two support-curved portions that have a curved shape provided at both ends
of the contact-curved portion and elastically support both ends of the contact-curved portion in an extending direction;

each support-curved portion forms an arc toward a lower side of the case; and
the cell holder is further provided with extending portions disposed between each battery cell and configured to come into
elastic contact with the inner surface of the lower side of the case.

US Pat. No. 9,601,729

BATTERY PACK FOR POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power-tool battery pack usable as a power supply of a power tool and capable of slidably attaching to and detaching from
a tool main body of the power tool, the power-tool battery pack comprising:
at least one battery cell;
a case housing the at least one battery cell; and
a female terminal having inner sides configured to electrically connect to and sandwich a counterpart side male terminal of
the tool main body as the battery pack is slidably attached to the tool main body, the female terminal being electrically
connectable to the at least one battery cell;

wherein the case comprises a case main body housing the at least one battery cell and a case-cover part connected to the case
main body;

the case-cover part comprises a female opening, which is configured to receive the male terminal, and sandwiching-wall parts,
which are configured to sandwich the female terminal from outer sides of the female terminal; and

the female terminal and the sandwiching-wall parts are configured such that, at least when the female terminal sandwiches
the male terminal, parts of the outer sides of the female terminal facing the sandwiching-wall parts serve as abutting-support
parts and are caused to touch the sandwiching-wall parts.

US Pat. No. 9,474,204

WORK MACHINE HAVING OPERATION ROD

MAKITA CORPORATION, Aich...

1. A work machine, comprising:
an elongated operation rod;
a front unit disposed at a front end of the elongated operation rod and configured to attach a tool;
a rear unit disposed at a rear end of the elongated operation rod and configured to attach a battery;
a handle provided on a middle portion of the elongated operation rod, the handle being configured to be gripped by a user
such that the front unit is disposed in front of the user and the rear unit is disposed behind the user;

a brushless motor disposed in the front unit that is disposed at the front end of the elongated operation rod, and configured
to drive the tool;

a motor controller disposed in the rear unit that is disposed at the rear end of the elongated operation rod in order to balance
the work machine by reducing the size and weight of the front unit, and electrically coupled with the battery; and

a plurality of motor power lines disposed along the operation rod and configured to electrically couple the motor controller
with the brushless motor,

wherein the motor controller includes a plurality of switching elements configured to switch a direction of electric current
flowing in each of the plurality of motor power lines, the plurality of switching elements being disposed in the rear unit
such that a distance from the plurality of switching elements to the motor is longer than a distance from the plurality of
switching elements to the battery.

US Pat. No. 9,341,681

ELECTRICAL DEVICE SYSTEM AND BATTERY PACK

MAKITA CORPORATION, Anjo...

5. A battery pack having a rechargeable battery, the battery pack comprising:
a current detecting unit that detects a battery current flowing through the battery;
a battery state detecting unit that detects at least one of a battery voltage and a temperature of the battery; and
a determining unit that estimates an amount of change in at least one of the battery voltage and the temperature detected
by the battery state detecting unit, based on the battery current detected by the current detecting unit, and calculates an
actual amount of change in at least one of the battery voltage and the temperature detected by the battery state detecting
unit, wherein the determining unit determines that the current detecting unit is abnormal when a difference between the calculated
actual amount of change and the estimated amount of change is a default value or more, wherein the determining unit includes
a counting unit that counts a number of times the difference between the actual amount of change and the estimated amount
of change is determined to be the default value or more, and, when a count value by the counting unit reaches a predetermined
value, determines that the current detecting unit is abnormal.

US Pat. No. 9,249,716

STRATIFIED SCAVENGING TWO-STROKE ENGINE

MAKITA CORPORATION, Anjo...

1. A stratified scavenging two-stroke engine comprising:
a piston;
a cylinder that houses the piston in a manner allowing reciprocation;
a crankshaft that is connected to the piston via a connecting rod;
a crankcase that houses the crankshaft in a manner allowing rotation;
a mixture gas passage that introduces mixture gas into the crankcase;
a scavenging passage that extends between a scavenging intake that opens into the crankcase and a scavenging port that opens
into the cylinder, wherein the scavenging passage is configured to connect with the crankcase via the scavenging port when
a negative pressure is generated within the crankcase in a part of an upward stroke period during which the piston moves to
a direction opposite to the crankcase;

an air passage that is connected to an intermediate position of the scavenging passage for introducing air into the scavenging
passage;

a first check valve that is disposed within a section of the scavenging passage between the scavenging intake and the intermediate
position, and is configured to prevent the air introduced into the scavenging passage from flowing toward the scavenging intake;
and

a second check valve that is disposed within the air passage, and is configured to prevent the air within the air passage
from reverse-flowing toward a direction opposite to the scavenging passage,

wherein the section of the scavenging passage between the intermediate position and the scavenging intake, the air passage,
and the mixture gas passage are located at a same side of a plane that contains at least two points on a longitudinal axis
of the cylinder and is parallel to a rotation axis of the crankshaft, and

a longitudinal axis of the section of the scavenging passage between the intermediate position and the scavenging intake a
longitudinal axis of the air passage, a longitudinal axis of the mixture gas passage and the longitudinal axis of the cylinder
extend in a common plane.

US Pat. No. 9,246,416

BRAKING APPARATUS FOR THREE-PHASE BRUSHLESS MOTOR, AND MOTOR-DRIVEN APPLIANCE PROVIDED WITH SAME

MAKITA CORPORATION, Anjo...

1. A braking apparatus for a three-phase brushless motor having three terminals, the braking apparatus comprising:
a switching circuit that includes six switching elements, the six switching elements being provided in a positive electrode
side conduction path that connects the three terminals with a positive electrode side of a direct current power source and
in a negative electrode side conduction path that connects the three terminals with a negative electrode side of the direct
current power source, and adapted to conduct or cut off each of the positive electrode side conduction path and the negative
electrode side conduction path; and

a brake control device that is configured to perform braking control in which a braking force is generated in the three-phase
brushless motor by controlling an on/off state of the six switching elements when one of a stop command and a deceleration
command of the three-phase brushless motor is input upon rotation of the three-phase brushless motor,

wherein the brake control device is configured to be able to perform two-phase short-circuit control in which an on/off state
of each of the six switching elements is set in such a manner that two out of three conduction paths constituting one of the
positive electrode side conduction path and the negative electrode side conduction path are in a conducting state and other
of the three conduction paths is in a non-conducting state,

wherein the brake control device is configured to be able to perform three-phase short-circuit control in which an on/off
state of each of the six switching elements in the switching circuit is set in such a manner that the three conduction paths
constituting one of the positive electrode side conduction path and the negative electrode side conduction path are brought
into a conducting state and the three conduction paths constituting the other are brought into a non-conducting state, and

wherein the brake control device is further configured to select one short-circuit control from the two-phase short-circuit
control and the three-phase short-circuit control by user operation of a braking force changeover switch and to perform the
selected one short-circuit control in the braking control.

US Pat. No. 9,179,811

WORK APPARATUS

MAKITA CORPORATION, Aich...

1. A work apparatus comprising:
a blower unit including a drive motor, a volute casing, a fan rotatably supported within the volute casing and driven by the
drive motor, and an airflow duct connected to the volute casing, thereby blowing out or sucking in air through the airflow
duct;

an airflow tube coupled to the airflow duct of the blower unit and having an open distal end for blowing out or sucking in
air through the airflow tube, the airflow tube being provided with a holding device configured to be held and operated when
in use;

an electrically conductive member arranged within the airflow tube at least in a range between a position where the holding
device is provided and the open distal end of the airflow tube; and

an electrically grounding member provided at the open distal end of the airflow tube and electrically connected to the electrically
conductive member, the electrically grounding member being configured to ground an electrostatic charge,

wherein the electrically grounding member is an electrically conductive ring fitted and fixed to the open distal end of the
airflow tube.

US Pat. No. 9,083,184

BATTERY PACK FOR ELECTRIC POWER TOOL, AND BATTERY CONNECTION DEVICE

MAKITA CORPORATION, Anjo...

1. A battery connection device that is electrically connected to a battery pack for electric power tools, the device comprising:
an authentication data creating unit that creates authentication data;
a conversion unit that performs a first conversion of the authentication data created by the authentication data creating
unit;

a transmission unit that transmits to the battery pack the authentication data created by the authentication data creating
unit when the battery pack is electrically connected to the battery connection device;

a receiving unit that receives from the battery pack a battery-side conversion result that is data obtained after the authentication
data is converted by the battery pack;

a reverse conversion unit that, on an assumption that the battery pack as an authentic product creates the battery-side conversion
result by performing the first conversion and further a second conversion on the authentication data, performs a reverse conversion
of the second conversion on the battery-side conversion result received by the receiving unit; and

a determination unit that compares a result of the reverse conversion performed by the reverse conversion unit with a result
of the first conversion performed by the conversion unit and determines whether or not the battery pack is an authentic product.

US Pat. No. 10,028,432

VEGETATION CUTTER

MAKITA CORPORATION, Aich...

1. A vegetation cutter comprising:a frame rod having a longitudinal axis and a front end;
a rotary cutter mounted on the front end of the frame rod;
a drive motor for driving the rotary cutter;
a grip disposed around the frame rod and having an external surface to be held by a user;
a power switch trigger arranged on the grip for energizing the drive motor; and
a safety lock mechanism for rendering the power switch trigger inoperative when the safety lock mechanism is in a lock position and for rendering the power switch trigger operative when the safety lock mechanism is in a release position, the safety lock mechanism including a manipulating knob for selectively setting the safety lock mechanism in the lock position and in the release position,
wherein the manipulating knob is disposed on the grip at a position circumferentially opposite to the power switch trigger and is turnable around an axis which is parallel to the longitudinal axis of the frame rod to selectively bring the safety lock mechanism to the lock position and the release position.

US Pat. No. 9,819,203

ELECTRIC POWER TOOL SYSTEM

MAKITA CORPORATION, Anjo...

1. An electric power tool system comprising:
a tool main body;
a battery pack configured to be detachably attached to the tool main body, wherein the battery pack comprises:
at least one rechargeable battery,
a battery pack housing containing the at least one rechargeable battery, and
a charge receiving element electrically connected to the at least one rechargeable battery and disposed on or within the battery
pack housing; and

a first charger configured to charge the battery pack, wherein the first charger comprises:
at least one rechargeable battery configured to supply energy to charge the at least one rechargeable battery of the battery
pack, and

a charge transmitting element electrically connected to the at least one battery of the first charger and configured to wirelessly
transmit the energy to the charge receiving element of the battery pack.

US Pat. No. 9,815,182

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool which rotationally drives a tool bit, comprising:
a motor which includes an output shaft, and
a rotation transmission mechanism which transmits rotation of the output shaft to the tool bit and thereby rotationally drives
the tool bit,

wherein the rotation transmission mechanism comprises:
a driving member which includes a rotation shaft, the driving member being rotationally driven by the motor,
a driven member to which the tool bit is attached, the driven member being disposed coaxially with the rotation shaft,
a transmitting member which is disposed between the driving member and the driven member and is movable in a circumference
direction of the rotation shaft between a transmittable position in which rotation of the output shaft is transmitted to the
driven member via the transmitting member and a non-transmittable position which is different position from the transmittable
position in which the transmission of rotation is interrupted, and

a switching member which is configured to switch a position of the transmitting member between the transmittable position
and the non-transmittable position by moving in the circumference direction of the rotation shaft with respect to the driven
member,

and wherein the driven member is configured to move between a first position and a second position in an axial direction of
the rotation shaft,

and wherein the switching member is allowed to move in the circumference direction of the rotation shaft with respect to the
driven member based on the position of the driven member in the axial direction of the rotation shaft, and the transmitting
member is switched between the transmittable position and the non-transmittable position by the movement of the switching
member.

US Pat. No. 9,186,808

POWER TOOL WITH CONTINUOUSLY-VARIABLE TRANSMISSION TRACTION DRIVE

MAKITA CORPORATION, Anjo...

1. A power tool comprising:
a continuously-variable transmission traction drive;
a spindle mounted with a tool tip;
a power transmission path between the spindle and the continuously-variable transmission traction drive; and
a clutch mechanism disposed in the power transmission path to intercept a rotary power, wherein
the continuously-variable transmission traction drive comprises
a conical planetary roller,
a solar roller pressed against the conical planetary roller, and
a thrust cam mechanism including a thrust roller pressed against the conical planetary roller,
the thrust cam mechanism is configured to generate a pressing force between the conical planetary roller and the solar roller
by pressing the thrust roller to the conical planetary roller,

the thrust cam mechanism is configured to generate the pressing force when a load torque of the tool tip is smaller than a
predetermined value, and

the thrust cam mechanism serves as the clutch mechanism configured to intercept the rotary power when the load torque reaches
the predetermined value.

US Pat. No. 9,126,320

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool, in which a predetermined elongate tool bit is linearly driven to perform a predetermined operation, comprising:
a tool body,
a motor that is housed within the tool body and disposed such that an extension of a motor output shaft extends transversely
to an axis of the tool bit,

a striking part that is housed within a front region of the tool body and strikes the tool bit,
a motion converting part that is disposed above the motor and converts an output of rotating a motor output shaft when the
motor is driven, into an output of striking the tool bit by the striking part,

a first cooling air passage that is provided within the tool body and through which cooling air can be led to the motor,
a second cooling air passage that is provided within the tool body and through which cooling air can be led to the striking
part,

a motor cooling fan that is disposed below the motor and activated to supply cooling air to the first cooling air passage
when the motor is driven, and

a striking part cooling fan that is disposed between the motor and the motion converting part and activated to supply cooling
air to the second cooling air passage when the motor is driven,

wherein the first cooling air passage and the second cooling air passage are separated by a partition wall which is disposed
within the tool body, the partition wall being disposed in an area formed between the motor and the motion converting part,

the first cooling air passage communicates with a second inlet and a second outlet, and the second cooling air passage communicates
with a first inlet which is separately arranged from the second inlet and a first outlet which is separately arranged from
the second outlet, and

the second outlet is disposed at a motor side with respect to the partition wall, and the first outlet is disposed at a motion
converting part side with respect to the partition wall.

US Pat. No. 10,090,692

CHARGER FOR HAND-HELD POWER TOOL, POWER TOOL SYSTEM AND METHOD OF CHARGING A POWER TOOL BATTERY

MAKITA CORPORATION, Anjo...

1. A charger for a hand-held power tool, comprising:a power source interface,
a charger base, and
a charging cradle rotatably supported on the charger base and having a power tool mounting surface configured to support the hand-held power tool for rotation with the charging cradle relative to the charger base, the rotatable charging cradle including at least one charging output terminal electrically connected to the power source interface, the at least one charging output terminal being configured to wirelessly transmit charging power.

US Pat. No. 9,855,614

JIGSAW

MAKITA CORPORATION, Anjo...

1. A jigsaw, comprising:
a main body including a grasping part configured to be grasped by a user;
a blade projecting downwardly from a front part of the main body and configured to reciprocate in an up-down direction; and
a base coupled to a lower part of the main body, a lower surface of the base comprising a planar contact surface having a
front end and a rear end and parallel lateral sides, the planar contact surface being configured to make contact with a workpiece
and being free of projections;

wherein, the rear end of the planar contact surface is located at a position that coincides with, or is rearward of, a rear
end of the grasping part, and

a back portion of the planar contact surface extends rearward from the parallel lateral sides to the rear end of the planar
contact surface and is substantially triangular or is substantially trapezoidal or comprises first and second walls extending
inwardly from and perpendicular to the parallel lateral sides and a finger having parallel lateral sides extending from the
first and second walls.

US Pat. No. 9,827,659

DRIVER TOOL

MAKITA CORPORATION, Anjo...

1. A driving tool configured to drive an object by striking it, comprising:
a motor,
a cylinder having a cylinder chamber,
a first piston slidably disposed within the cylinder chamber, the first piston having an elongated driving part connected
to a sliding part and configured to strike the object,

a compression device having a compression chamber,
a second piston slidably disposed within the compression chamber, the second piston being configured to be driven by the motor
and to generate compressed air by changing an internal volume of the compression chamber,

a compressed air supply passage defining a compressed air communication path between the compression chamber and the cylinder
chamber,

a valve member,
a crank mechanism configured to be driven by the motor to reciprocate the second piston within the compression chamber, and
a rotatably-driven cam member connected to the crank mechanism,
a relay member that mechanically connects the cam member with the valve member, and is configured to convert rotation of the
cam member into linear motion and to transmit the linear motion to the valve member,

wherein:
the first piston is configured to be moved by the compressed air supplied from the compression chamber into the cylinder chamber
from an initial position to strike the object,

the valve member is configured to open and close the compressed air supply passage according to an amount of cam lift of the
cam member, and

the amount of cam lift of the cam member is set such that the compressed air supply passage is held open by the valve member
until the first piston has struck the object and has returned to the initial position.

US Pat. No. 9,825,572

ELECTRIC WORKING MACHINE

MAKITA CORPORATION, Anjo...

7. An electric working machine comprising:
a housing;
a mount configured to mount one of a tool bit and an edged tool for carrying out work to a workpiece;
a motor that is built in the housing and configured to be driven by electric power supplied from an electric power source
to drive the mount;

an operation switch for driving the motor;
a current detector configured to detect a current flowing through the motor during drive of the motor in association with
an operation of the operation switch;

a voltage detector configured to detect an input voltage supplied to the motor during drive of the motor; and
a load state determination unit configured to determine whether the motor is in a no-load operation state in which no work
is carried out to the workpiece during drive of the motor, based on the current detected by the current detector, the input
voltage detected by the voltage detector, and an output voltage from the electric power source,

wherein:
the operation switch is provided closer to the motor than a connecting section to the voltage detector in a current path to
the motor, and is configured to complete/interrupt the current path, and

the load state determination unit is configured to acquire the input voltage from the voltage detector when the operation
switch is ON, and the output voltage from the voltage detector when the operation switch is OFF and the motor is not driven.

US Pat. No. 9,815,185

POWER TOOL

MAKITA CORPORATION, Anjo...

1. A power tool which drives a tool bit in a longitudinal direction of the tool bit and performs an operation, comprising:
a motor which has an output shaft being parallel to the longitudinal direction of the tool bit,
a driving mechanism which is connected to the output shaft and driven by the motor,
a main body which houses the motor and the driving mechanism,
a main handle which is movable with respect to the main body,
a guide element which guides the main handle such that the main handle moves in the longitudinal direction of the tool bit
with respect to the main body, and

a biasing member which is arranged between the main body and the main handle and is preloaded with a biasing force that biases
the main body and the main handle away from one another in the longitudinal direction of the tool bit even in an initial state,

wherein the main handle moves against the main body in a state that the main handle is biased by the biasing member, and transmission
of vibration generated during the operation from the main body to the main handle is prevented.

US Pat. No. 9,719,416

STRATIFIED SCAVENGING TWO-STROKE ENGINE

MAKITA CORPORATION, Aich...

1. A stratified scavenging two-stroke engine including either a cylinder member in which a cylinder housing a piston is formed
and a crankcase joined with the cylinder member, or the cylinder member and a crankcase-forming member forming a part of the
crankcase joined with the cylinder member,
the engine comprising:
an intake passage that connects an intake that opens through an outer surface of the cylinder member with an intake port that
opens to the inside of the cylinder according to movement of the position of the piston, and is configured to supply a gaseous
mixture of fuel and air to the inside of the crankcase;

an exhaust passage that connects an exhaust outlet that opens through the outer surface of the cylinder member with an exhaust
port that opens to the inside of the cylinder according to movement of the position of the piston, and is configured to discharge
a combustion gas inside of the cylinder;

a scavenging passage that connects a scavenging intake that opens to the inside of the crankcase with a scavenging port that
opens to the inside of the cylinder according to movement of the position of the piston; and

an air passage that connects an air inlet that opens through the outer surface of the cylinder member with the scavenging
passage and is configured to supply air for pre-scavenging into the scavenging passage,

wherein the intake and the air inlet are arranged at positions opposite from the exhaust outlet across an axis of the cylinder,
and the intake and the air inlet are arranged side by side in a substantially circumferential direction of the cylinder in
such a manner that the intake and the air inlet do not overlap in a direction along the axis of the cylinder.

US Pat. No. 9,352,481

CUTTING DEVICE

MAKITA CORPORATION, Anjo...

1. A cutting device for metal machining, comprising a base on which a material to be cut is placed, the base having first
and second engaging holes and a front rear direction, a tool main body that is vertically movable and supported by the base,
and a fence that is provided on a top plate part of the base and has a fence base part and a fence surface on a front side
of the base for contacting the material to be cut and positioning the material on the top plate part, wherein:
the fence is configured to be fixed with respect to the base via an interposing member that is interposed between the base
and the fence;

the interposing member is configured to be fixed with respect to the base by a first fixing member and the fence is configured
to be fixed with respect to the interposing member by a second fixing member, whereby the fence is indirectly fixed with respect
to the base;

a direction of the fence surface is configured to be changed by rotating the interposing member around a rotation axis that
is situated on the fence base part at an opposite side to the material to be cut;

the interposing member comprises a first insert hole and a second insert hole;
the fence base part comprises a insert hole and an arcuate guide slot;
the first fixing member engages the first insert hole of the interposing member, the insert hole of the fence base part, and
one of the engaging holes;

the second fixing member engages the second insert hole of the interposing member, the arcuate slot of the fence base part,
and the other engaging hole;

the rotation axis is on the first fixing member;
each engaging hole comprises a longitudinal groove hole extending in the front rear direction and a plurality of transverse
groove holes intersecting the longitudinal hole.

US Pat. No. 9,287,810

MOTOR CONTROL CIRCUIT

MAKITA CORPORATION, Anjo...

1. A motor control circuit, comprising:
a switching element that controls a motor current;
a current detection element that detects the motor current, the current detection element connected to the switching element
in series;

a temperature detection element configured to detect a temperature of the switching element and a temperature of the current
detection element; and

a temperature detection circuit, wherein:
a first terminal of the temperature detection element is electrically connected to an electrical connecting section between
the switching element and the current detection element; and

a second terminal of the temperature detection element is electrically connected to the temperature detection circuit.

US Pat. No. 9,206,736

STRATIFIED SCAVENGING TWO-STROKE ENGINE

MAKITA CORPORATION, Aich...

1. A stratified scavenging two-stroke engine comprising:
an intake passage that supplies a gaseous mixture of fuel and air to an inside of a crankcase;
a first scavenging passage that extends from a first scavenging intake that opens to the inside of the crankcase to a first
scavenging port that opens to an inside of a cylinder according to movement of a position of a piston;

a second scavenging passage that extends from a second scavenging intake that opens to the inside of the crankcase to a second
scavenging port that opens to the inside of the cylinder according to movement of the position of the piston;

a communicating portion through which the first scavenging passage and the second scavenging passage communicate with each
other;

an air passage that supplies an air for pre-scavenging into the first scavenging passage at a position closer to the first
scavenging intake than the communicating portion;

a first check valve that inhibits a flow of air from the first scavenging passage to the inside of the crankcase during an
upward stroke of the piston; and

a second check valve that inhibits a flow of air and the gaseous mixture from the first scavenging passage through the air
passage to an outside of the crankcase during a downward stroke of the piston,

wherein the engine is configured so that during the upward stroke of the piston, the gaseous mixture is supplied from the
intake passage to the inside of the crankcase, and the air, that has been supplied through the air passage into the first
scavenging passage, flows through the communicating portion into the second scavenging passage, and

wherein the engine is configured so that during the downward stroke of the piston, the air, that has entered into the first
and the second scavenging passages during the upward stroke of the piston, flows through the first and the second scavenging
ports to the inside of the cylinder, so that the gaseous mixture inside of the crankcase is supplied through the first and
the second scavenging passages and the first and the second scavenging ports to the inside of the cylinder.

US Pat. No. 9,621,081

MOTOR- DRIVEN APPARATUS AND METHOD FOR DRIVING THE SAME

MAKITA CORPORATION, Anjo...

1. A motor-driven apparatus comprising:
a brushless motor comprising a plurality of phases and a plurality of coils, each of the plurality of coils corresponding
to a different one of the plurality of phases;

a full-wave rectifier circuit configured to full-wave rectify an alternating-current power supply voltage supplied from an
alternating-current power source provided external to the motor-driven apparatus, to thereby generate a full-wave rectified
voltage, and to output the full-wave rectified voltage to a supply path to the plurality of coils;

a drive circuit comprising a plurality of switching elements provided on the supply path and coupled to the full-wave rectifier
circuit through the supply path, the drive circuit being configured to apply the full-wave rectified voltage outputted to
the supply path to the plurality of coils through a switching operation of the plurality of switching elements;

a controller configured to perform a switching control to execute the switching operation of the plurality of switching elements
when a drive instruction is inputted to the motor-driven apparatus, to thereby drive the brushless motor; and

a forcible stop unit configured to perform a forcible stop control to temporarily forcibly stop the switching operation of
the plurality of switching elements during a stop period when the full-wave rectified voltage is smaller than an induced voltage
generated by the plurality of coils and the switching operation of the plurality of switching elements is to be stopped.

US Pat. No. 9,577,228

BATTERY PACKS FOR ELECTRIC TOOLS

MAKITA CORPORATION, Anjo...

1. A battery pack for detachably mounting to a device body of an electric tool or a charger, comprising:
a battery side terminal electrically connectible with a device side terminal of the device body, the device side terminal
being configured to have a shape of a flat plate and having a first side surface and a second side surface opposite to each
other; wherein:

the battery side terminal comprises a first contact portion and a second contact portion arranged to be opposed to each other,
and a third contact portion and a fourth contact portion arranged to be opposed to each other, the first contact portion and
the third contact portion being configured to form an electric contact through contact with the first side surface of the
device side terminal, and the second contact portion and the fourth contact portion being configured to form an electric contact
through contact with the second side surface of the device side terminal;

the first contact portion is configured to contact the first side surface in a first contact range having a first length;
the second contact portion is configured to contact the second side surface in a second contact range having a second length
that is less than the first length;

the first contact portion and the second contact portion extend in a first direction, and the first length and the second
length extend in a second direction that is substantially perpendicular to the first direction;

the third contact portion is configured to contact the first side surface in a third contact range having a third length;
the fourth contact portion is configured to contact the second side surface in a fourth contact range having a fourth length
that is less than the third length;

the third contact portion and the fourth contact portion extend in the first direction, and the third length and the fourth
length extend in the second direction; and

the first contact range and the second contact range at least partly overlap with one another along the second direction,
and the third contact range and the fourth contact range at least partly overlap one another along the second direction.