US Pat. No. 9,140,370

CHANNEL SWITCHING VALVE AND HEAT PUMP SYSTEM USING THE SAME

Fujikoki Corporation, To...

1. A channel-switching valve, comprising:
a valve main body provided with a valve chamber having an upper side valve seat section and a lower side valve seat section;
a valve body which is rotated with upper and lower end surfaces of the valve body opposed to and in contact with the upper
side valve seat section and the lower side valve seat section; and

an actuator which rotationally drives the valve body,
wherein a plurality of ports which communicate with an exterior of the valve main body are formed in the upper side valve
seat section, and a plurality of ports which communicate with the exterior of the valve main body are formed in the lower
side valve seat section;

wherein the plurality of ports formed in the upper side valve seat section serve as a plurality of upper side inlet/outlet
ports and an upper side main port, and the plurality of ports formed in the lower side valve seat section serve as a plurality
of lower side inlet/outlet ports which are paired with the plurality of upper side inlet/outlet ports and a lower side main
port;

wherein the lower side main port is paired with the upper side main port;
wherein the valve body is provided with at least one communication path which can allow the plurality of ports formed in the
upper side valve seat section and the plurality of ports formed in the lower side valve seat section to communicate with each
other;

wherein the valve chamber is substantially hermetically divided into an upper chamber section including the upper side valve
seat section and a lower chamber section including the lower side valve seat section by the valve body;

wherein the at least one communication path allows at least one port formed in the upper side valve seat section and at least
one port formed in the lower side valve seat section to communicate with each other or does not allow all ports formed in
the upper side valve seat section and all ports formed in the lower side valve seat section to communicate with each other
in accordance with a rotational position of the valve; and

wherein the valve body can take a third rotation position in which only the upper and lower side main ports are allowed to
communicate with each other, in addition to the first and the second rotation positions.

US Pat. No. 9,525,373

STEPPING MOTOR AND MOTORIZED VALVE USING IT

FUJIKOKI CORPORATION, (J...

1. A stepping motor motorized valve comprising;
a valve main body having a valve chamber and a valve port opening to the valve chamber,
a valve body disposed movably up and down in the valve chamber for opening and closing the valve port, said valve body being
driven by a stepping motor,

the stepping motor comprising a stator and a rotor rotationally driven by the stator, the valve body being attached to the
rotor,

a detection rotor attached to the rotor for detecting a rotation position of the rotor,
wherein the detection rotor is rotatably disposed on a co-axial center with the rotor, and rotationally driven by the rotor
via a rotation drive mechanism provided between the rotor and the detection rotor, and

wherein the rotation drive mechanism has a drive play angle in a rotation direction of the rotor to such an extent as to allow
the detection rotor to be moved in a direction opposite to the rotation direction of the rotor, when the detection rotor is
rotated by the rotor;

a conversion mechanism for converting rotational movement of the rotor of the stepping motor to the up and down movement of
the valve body, and

a rotation stop mechanism for stopping the rotation of the rotor in one direction, when the rotor is rotated by the stator
in said one direction and the valve body is moved up and down by the conversion mechanism to reach a predetermined position,

wherein said angle of the drive play is defined to be equal to or greater than an angle to which the rotor is attracted in
a direction opposite to said one direction due to change in magnetic pole of the stator by a subsequent drive pulse signal,
when rotation of the rotor in said one direction is stopped by the rotation stop mechanism.

US Pat. No. 9,194,510

COMPOSITE VALVE

FUJIKOKI CORPORATION, To...

13. A composite valve comprising:
a piston type first valve body;
a valve shaft provided with a needle type second valve body;
an elevation driving means for moving up and down said valve shaft;
a pilot valve body driven so as to be opened and closed by utilizing the elevating motion of said valve shaft; and
a valve main body provided with an inflow port and an outflow port,
wherein between said inflow port and the outflow port in said valve main body, there are provided a fitting and inserting
chamber to which said first valve body is slidably fitted and inserted, and which is zoned into a back pressure chamber and
a first valve chamber by said first valve body, a first valve port which is open to said first valve chamber, a second valve
chamber in which said pilot valve body and the second valve body are arranged so as to be movable up and down such that the
pilot valve body surrounds the valve shaft so as to be slidable along the valve shaft, a second valve port which communicates
said inflow port or the first valve chamber with said second valve chamber, and a pilot passage which communicates said back
pressure chamber with said second valve chamber, and

wherein in the case that a lift amount of said second valve body is equal to or less than a predetermined amount, said pilot
passage is closed by said pilot valve body, and said first valve port is closed by said first valve body, thereby taking a
small flow rate control state in which a flow rate is controlled in correspondence to the lift amount of said second valve
body, and in the case that the lift amount of said second valve body goes beyond said predetermined amount, said pilot valve
body is moved up in conjunction with the upward movement of said valve shaft so as to open said pilot passage, thereby taking
a large flow rate control state in which said first valve body opens said first valve port on the basis of this.

US Pat. No. 9,121,522

ELECTRICALLY OPERATED VALVE

FUJIKOKI CORPORATION, To...

1. An electrically operated valve comprising:
a valve main body having a first inlet and outlet, a valve chamber to which said first inlet and outlet is open, a lower chamber
which is connected to said valve chamber, and a second inlet and outlet which is connected to said lower chamber;

a movable valve seat body which is arranged between said valve chamber and said lower chamber, and forms a main valve port
for forming a small flow rate flow path extending from said first inlet and outlet to the second inlet and outlet;

a valve shaft which has a needle type valve body portion arranged within said valve chamber for regulating a flow rate passing
through said main valve port; and

a motor for moving up and down said valve shaft,
wherein said movable valve seat body has a valve seat plate portion having an outer peripheral portion which is connected
to and disconnected from an opening end edge portion close to said valve chamber in said lower chamber,

a fitting portion which comes down from said valve seat plate portion so as to be slidably fitted to said lower chamber,
said main valve port is formed in said valve seat plate portion, and
a communication path providing a large flow rate flow path is formed in said fitting portion extending from the second inlet
and outlet to the first inlet and outlet,

wherein said movable valve seat body is configured to
serve as a float type check valve body for opening and blocking said large flow rate flow path, and
wherein said movable valve seat body is configured so as to be pressed to said opening end edge portion when the liquid flows
from said first inlet and outlet to the second inlet and outlet, and configured so as to be moved away from said opening end
edge portion by an upward movement of the valve shaft by the motor, permitting the communication path moved into the valve
chamber so as to be opened, when the liquid flows from said second inlet and outlet to the first inlet and outlet.

US Pat. No. 9,377,123

SOLENOID VALVE

FUJIKOKI CORPORATION, To...

1. A solenoid valve comprising:
a valve main body which has a valve chamber communicating with each of an inlet port and a first outlet port;
a valve body which is arranged within said valve chamber;
a valve holder which retains said valve body and is made of a magnetic material;
an energizing member which energizes said valve holder in a direction of said first outlet port;
a pipe member which has a second outlet port communicating with said valve chamber and is extended upward from said valve
chamber;

a suction element which is formed in a cylindrical shape and surrounds said pipe member, such that said pipe member is inside
said suction element, wherein said suction element is configured to be separated from a fluid flow passing through said solenoid
valve;

a coil bobbin which surrounds said valve holder and said suction element;
an electromagnetic coil, wherein said electromagnetic coil is wound around said coil bobbin; and
a mold cover which surrounds a whole of said coil bobbin, is integrated with said valve main body and defines said valve chamber
by said valve main body, said pipe member and said coil bobbin,

wherein said valve main body, said pipe member, said coil bobbin and said mold cover are formed by a resin material,
wherein said suction element is made of a magnetic metal,
wherein said valve holder is slidably arranged inside a lower portion of said coil bobbin, and has a tube body which faces
to said suction element, a fluid insertion hole which is pierced in said tube body, and a retention portion which retains
said valve body,

wherein when said electromagnetic coil is excited, said valve holder is sucked by said suction element and said valve body
closes said second outlet port of said pipe member,

wherein when said electromagnetic coil is not excited, said valve holder is energized by said energizing member and said valve
body closes said first outlet port,

wherein said coil bobbin is provided with a collar wall which faces to said valve main body, and an annular welding projection
portion which protrudes toward said valve main body from said collar wall and is welded to an inner peripheral surface of
said mold cover,

wherein said annular welding projection portion is provided with a tapered surface, wherein the diameter of said tapered surface
is reduced from an inner peripheral surface in a leading end side of said annular welding projection portion toward an inner
peripheral surface in a base side of said annular welding projection portion, and a burr accommodating space which is constructed
between said tapered surface and an outer peripheral surface of said valve holder, and

wherein said annular welding projection portion accommodates in said burr accommodating space a burr which is generated in
a bonded surface between said annular welding projection portion and the inner peripheral surface of said mold cover when
said mold cover is resin molded in said coil bobbin so as to keep clearance.

US Pat. No. 9,404,600

THREE-WAY SOLENOID VALVE

FUJIKOKI CORPORATION, To...

1. A three-way solenoid valve comprising:
a valve body that is provided with an inlet, first and second outlets, a first valve seat positioned between the inlet and
the first outlet, and a second valve seat positioned between the inlet and the second outlet;

a first valve element that is movably disposed in the valve body so as to approach and be separated from the first valve seat;
an electromagnetic actuator that drives the first valve element; and
a second valve element that is movably disposed in the valve body so as to approach and be separated from the second valve
seat,

wherein the valve body includes a conduction hole that communicates with a back pressure chamber formed on a side of the second
valve element opposite to the second valve seat, a third valve seat that is positioned between the conduction hole and the
second outlet, a third valve element that is movably disposed so as to approach and be separated from the third valve seat,
a biasing member that biases the third valve element toward the third valve seat, and an actuating member that is interposed
between the first valve element and the third valve element, and

when the first valve element is moved in the valve body by the electromagnetic actuator and approaches or is separated from
the first valve seat, the third valve element is separated from or approaches, respectively, the third valve seat by the actuating
member or the biasing member and differential pressure between the front and the rear sides of the second valve element is
changed through the conduction hole, so that the second valve element is separated from or approaches, respectively, the second
valve seat.

US Pat. No. 9,109,716

COMPOSITE VALVE

FUJIKOKI CORPORATION, To...

1. A composite valve comprising:
a first valve body;
a valve shaft which is provided with a second valve body;
an elevation driving means for moving up and down said valve shaft;
a pilot valve body which is driven so as to be opened and closed by utilizing an elevating motion of said valve shaft; and
a valve main body which is provided with an inflow port and an outflow port,
wherein between said inflow port and said outflow port in said valve main body, there are provided a fitting and inserting
chamber to which said first valve body is slidably fitted and inserted, and which is zoned into a back pressure chamber and
a first valve chamber by said first valve body, a first valve port which is open to said first valve chamber, a second valve
chamber in which said pilot valve body and said second valve body are arranged so as to be movable up and down, a communication
path which communicates said inflow port or said first valve chamber with said second valve chamber, a second valve port which
communicates said second valve chamber with said outflow port, and a pilot passage which communicates said back pressure chamber
with said outflow port,

wherein said first valve body and said second valve body are arranged in such a manner as to be moved up and down in the same
direction, and are away from each other only at a predetermined distance, and

wherein in the case that a lift amount of said second valve body is equal to or less than a predetermined amount, said pilot
passage is closed by said pilot valve body, and said first valve port is closed by said first valve body, thereby taking a
small flow rate control state in which a flow rate is controlled in correspondence to said lift amount of said second valve
body, and in the case that said lift amount of said second valve body goes beyond said predetermined amount, said pilot valve
body is moved up in conjunction with the upward movement of said valve shaft so as to open said pilot passage, thereby taking
a large flow rate control state in which said first valve body opens said first valve port.

US Pat. No. 9,506,830

PRESSURE SENSOR

FUJIKOKI CORPORATION, (J...

1. A pressure sensor comprising:
a diaphragm which receives a pressure of a fluid;
a semiconductor type pressure detecting device which is provided with a plurality of bonding pads including an earth pad;
a base which forms in relation to said diaphragm a pressure receiving space in which an insulative medium is sealed, and is
provided within said pressure receiving space with said semiconductor type pressure detecting device; and

a plurality of terminal pins which are implanted in said base and are electrically connected to said semiconductor type pressure
detecting device, and one earth terminal pin which is connected to a zero potential of an electric circuit,

wherein a neutralization plate is provided on said base at a peripheral position or a part of the peripheral position of said
semiconductor type pressure detecting device,

wherein said neutralization plate is arranged at a position at which a height from said base is the same as or lower than
a height of said semiconductor type pressure detecting device from said base, and

wherein said neutralization plate is electrically connected to said earth pad of said semiconductor type pressure detecting
device and said earth terminal pin.

US Pat. No. 9,385,564

STATOR OF DRIVE MOTOR FOR ELECTRICALLY OPERATED VALVE

FUJIKOKI CORPORATION, To...

1. A stator of a drive motor for an electrically operated valve which is installed to an outer peripheral portion of a can
attached to a valve main body having a valve port which is opened and closed by a valve member coupled to a rotor,
wherein said stator comprises:
a stator assembly which is provided with a yoke having magnetic pole teeth and a coil; and
a resin mold which integrally forms said stator assembly from a molten resin injected within a metal mold, and
wherein said stator comprises:
a plate having an inner diameter which is substantially the same as an inner diameter of said magnetic pole teeth, and arranged
in an upper surface of the stator assembly so as to prevent the molten resin from flowing to the magnetic pole teeth side
when the molten resin is injected into the metal mold,

wherein said resin mold is formed by the molten resin which is injected from only one gate provided in an upper portion of
the metal mold opposed to the plate, and cured to have no weld line in an outer peripheral portion of the resin mold.

US Pat. No. 9,080,688

FLOW REVERSING VALVE AND HEAT PUMP DEVICE USING SAME

Fujikoki Corporation, To...

1. A flow reversing valve, comprising:
a reversing valve main body including:
a first main valve part and a second main valve part in each of which an inlet, an outlet, a main valve chamber, and a back
pressure chamber are formed;

a first main valve member that is fitted in a freely slidable manner between the main valve chamber and the back pressure
chamber of the first main valve part;

a second main valve member that is fitted in a freely slidable manner between the main valve chamber and the back pressure
chamber of the second main valve part; and

a pressure equalizing hole that is formed in each of the first main valve member and the second main valve member to communicate
the main valve chamber with the back pressure chamber, the reversing valve main body being adapted to be capable of assuming
a first circulatory state in which the first main valve part is in a fully open state and the second main valve part is in
a fully closed state, and a second circulatory state in which the first main valve part is in a fully closed state and the
second main valve part is in a fully open state; and

back pressure regulating means adapted to regulate the pressure of each of the back pressure chambers of the first main valve
part and the second main valve part;

wherein the back pressure regulating means is adapted to regulate the pressure of the back pressure chamber by an amount of
fluid between the back pressure chamber and the outlet so as to place the reversing valve main body in the first circulatory
state by reducing the pressure of the back pressure chamber of the first main valve part, and in the second circulatory state
by reducing the pressure of the back pressure chamber of the second main valve part; and

wherein the back pressure chambers of the first and second main valve parts are arranged symmetrically on opposing sides of
and are separated by a shared base.

US Pat. No. 9,599,230

FEMALE SCREW MEMBER, MOTOR OPERATED VALVE USING THE SAME, AND METHOD FOR PRODUCING FEMALE SCREW MEMBER FOR MOTOR OPERATED VALVE

FUJIKOKI CORPORATION, (J...

1. A female screw member comprising:
a female screw part formed with a female screw; and
a projection part projecting in the direction of a center shaft of the female screw and having a working face in the rotating
direction centering on the center shaft,

said female screw part and projection part being integrally molded with a resin,
wherein the projection part has a spiral inclination face spirally inclining by one round from the working face centering
on the center shaft of the female screw,

wherein the height of the working face is equal to or smaller than a pitch of the female screw,
wherein the female screw part includes a cylindrical part having a larger inner diameter than the female screw, and wherein
the projection part is formed at a bottom of the cylindrical part.

US Pat. No. 9,459,029

VALVE CONTROLLER, VALVE CONTROLLING METHOD, REFRIGERATION AND COLD STORAGE SYSTEM, DEVICE AND METHOD FOR CONTROLLING THE SYSTEM

Fujikoki Corporation, To...

1. A controller for controlling operation of a refrigeration and cold storage system, said refrigeration and cold storage
system having a refrigeration cycle in which a compressor, a condenser, a motor-driven expansion valve and an evaporator are
connected in this order and a solenoid-operated valve disposed between the condenser and the evaporator to open/close a refrigerant
flow passage between them, said refrigeration and cold storage system switching operation/stoppage of the compressor in accordance
with a temperature of a controlled object, the controller further comprising:
a first control section for switching operation/stoppage of the compressor in accordance with the temperature of the controlled
object and controlling opening/closing of the solenoid-operated valve while outputting a signal for opening/closing the solenoid-operated
valve;

at least two sensors for sensing a degree of superheat of refrigerant flowing through the evaporator based on a comparison
of a temperature of refrigerant at an inlet of the evaporator, Tin, and a temperature of refrigerant at an outlet of the evaporator, Tout; and

a second control section for controlling valve opening of the motor-driven expansion valve in accordance with the degree of
superheat of a refrigerant flowing the evaporator;

wherein said second control section monitors opened/closed state of the solenoid-operated valve based on the signal for opening/closing
the solenoid-operated valve that is outputted from the first control section and stops outputting a driving signal for the
valve opening control in accordance with the closing of the solenoid-operated valve;

wherein said controller, when stopping the operation of the compressor, closes the solenoid-operated valve and maintains a
valve opening of the motor-driven expansion valve at an opening when the operation of the compressor stops in response to
a signal being generated for opening/closing the solenoid-operated valve, and when restarting the operation of the compressor,
opens the solenoid-operated valve and starts valve opening control of the motor-driven expansion valve from the opening at
the stoppage of the compressor in response to a signal being generated for opening/closing the solenoid-operated valve;

wherein said controller is further configured to operate in an emergency mode when one of the following conditions is met:
Tin is above a predetermined abnormal high temperature, Tin is below a predetermined abnormal low temperature, Tout is above a predetermined abnormal high temperature, and Tout is below a predetermined abnormal low temperature, in the emergency mode, the second control section transitions the motor-driven
expansion valve to a predetermined emergency valve opening position.

US Pat. No. 9,897,232

MOTOR-DRIVEN VALVE

Fujikoki Corporation, To...

1. A motor-driven valve comprising:
a valve body having a valve chamber defined internally, and having a lateral part and a bottom part in which a first opening
and a second opening are disposed, respectively;

a valve seat member having a valve port that opens on the valve chamber and a valve seat, the valve seat member being disposed
at the second opening of the valve body;

a valve element disposed in a vertically ascendable/descendable manner in the valve chamber; and a vertically driving unit
that makes the valve element ascend/descend with respect to the valve seat,

wherein a porous body is fixed to the valve seat member, the porous body being extended at least to be lateral to the valve
port and having a cutout part corresponding to the first opening, and

wherein the porous body includes a short-side part and a long-side part, the short-side part defines first vertical length
and the long-side part defines a second vertical length, the first vertical length dimensioned smaller than the second vertical
length, and

wherein the short-side part overlaps with the long-side part and the long-side part is located inside of the short-side part
and along an outer circumferential shape of the valve seat member.

US Pat. No. 9,765,904

DIAPHRAGM-ACTUATED FLUID CONTROL VALVE

FUJIKOKI CORPORATION, To...

1. A diaphragm-actuated fluid control valve comprising:
a valve for controlling a flow rate or pressure of a valve fluid;
a partition;
a valve body with an inlet port, an outlet port, and an orifice provided therebetween, the orifice being adapted to be opened
or closed by the valve; and

a diaphragm device adapted to drive the valve in a direction to open or close the orifice,
wherein:
the valve, the inlet port and the outlet port are provided below the partition,
the diaphragm device has a diaphragm, a diaphragm-holding member that fixedly seals an outermost peripheral portion of the
diaphragm, a first pressure chamber defined between an upper portion of the diaphragm device and an upper surface side of
the diaphragm, a first port for providing a sensing fluid into the first pressure chamber, and a second pressure chamber defined
between the partition and a lower surface of the diaphragm, the second pressure chamber being formed to operatively communicate
with and drive the valve in response to fluidic pressure in at least the first pressure chamber,

the valve is connected to an innermost portion of the lower surface of the diaphragm via an actuating rod,
the diaphragm-holding member is fixedly sealed to the valve body and the innermost portion of the diaphragm abuts a disk member
that is urged against the diaphragm by a compression coil spring that is disposed in a contracted position,

a radial portion between the peripheral portion and the central region of the diaphragm is further formed as a plurality of
concentric circles when viewed in a plan view and N+(0.5) mountainous-wave portions peak-to-peak in length when viewed in
cross section where N is a positive integer with a value of 3 or less, and

a bottom surface of the peripheral portion of the diaphragm defining a reference plane and a bottom surface of the central
region of the diaphragm defining a central region plane, the diaphragm is formed such that a distance between the central
region plane of the diaphragm and the reference plane of the peripheral portion of the diaphragm is equal to a peak-to-peak
amplitude of the mountainous wave portions of the diaphragm when a pressure difference between the first pressure chamber
and the second pressure chamber configures the valve in a fully closed position, the peak-to-peak amplitude being defined
as a distance between a vertex of the mountainous wave portion along the central region plane and a foot of the mountainous
wave portion along the reference plane.

US Pat. No. 9,765,900

MOTOR-DRIVEN VALVE

Fujikoki Corporation, To...

1. A motor-driven valve, comprising:
a valve body having a valve chamber and a valve seat;
a valve shaft having a valve element that ascends and descends with respect to the valve seat;
a motor including a rotor that rotates without ascending/descending with respect to the valve body and a stator to rotate
the rotor;

a reduction mechanism inserted between the rotor and the valve shaft;
a thread feeding mechanism disposed between the valve shaft and the valve body so as to, as the rotor rotates, make the valve
shaft ascend/descend with respect to the valve body;

a slide mechanism disposed between the valve shaft and the reduction mechanism so as to allow for ascending/descending motion
of the valve shaft with respect to the valve body; and

a biasing member inserted between the valve shaft and the valve body,
wherein:
the motor-driven valve is configured to perform an upward-moving stroke such that, by rotating the rotor in one direction,
the valve shaft ascends with respect to the valve body while rotating due to the thread feeding mechanism, and a downward-moving
stroke such that, by rotating the rotor in the other direction, the valve shaft descends with respect to the valve body while
rotating due to the thread feeding mechanism, and

a friction angle of a thread part of the thread feeding mechanism, a lead angle thereof, and a biasing force of the biasing
member are set so as to always bias the valve shaft to the valve body in a rotating direction in one direction or in the other
direction in the upward-moving stroke and the downward-moving stroke.

US Pat. No. 9,793,038

ELECTROMAGNETIC DRIVE COIL UNIT AND MOLDING METHOD THEREOF

FUJIKOKI CORPORATION, (J...

1. A resin molded electromagnetic drive coil unit comprising:
a stator assembly including a cylindrical yoke having magnetic pole teeth formed therein, a stator coil, and a power supply
terminal to the stator coil, and

a connector frame member surrounding the power supply terminal to the stator coil,
wherein the stator assembly and the connector frame member which are molded through separate processes are formed as a unified
body, and

wherein said connector frame member is molded in advance, said connector frame member is inserted onto the stator assembly,
and the resultant is molded as a unified body.

US Pat. No. 9,891,128

PRESSURE SENSOR HAVING A DIGITAL CIRCUIT UNIT CONNECTED TO ADJUSTMENT TERMINALS AND EARTH TERMINALS

FUJIKOKI CORPORATION, To...

1. A pressure sensor comprising:
a pressure detection element configured to include at least a digital circuit unit and a plurality of adjustment terminals
and an earth terminal which are connected to the digital circuit unit,

wherein at least one of the adjustment terminals and the earth terminal are electrically connected,
said pressure sensor, further comprising:
a base configured to be provided with the pressure detection element;
a diaphragm configured to receive a pressure of a fluid,
wherein the pressure detection element is provided in the pressure receiving space which is formed to seal an insulative medium
between the base and the diaphragm;

adjustment lead pins configured to be electrically connected to the adjustment terminals of the pressure detection element;
and

one earth-terminal lead pin configured to be connected to zero potential of an electric circuit,
wherein the respective lead pins are vertically provided in the base, and
wherein at least one of the adjustment lead pins and the earth-terminal lead pin are electrically connected on the base.

US Pat. No. 10,344,872

ELECTRIC VALVE HAVING A VALVE BODY WITH A CONSTRICTED SURFACE PORTION

FUJIKOKI CORPORATION, To...

1. An electric valve comprising a valve main body including a valve chamber and a valve port to which a valve seat is attached and a valve body changing a flow rate of a fluid flowing through the valve port in accordance with a lift amount,wherein the valve body includes a seating surface portion having a lower end adapted to be seated on the valve seat and a curved surface portion adapted to be inserted into the valve port, the curved surface portion having an inverted truncated cone shape with a curved or tapered surface having a diameter that decreases continuously or in stages from an upper end towards a tip of the valve body, and a constricted surface portion smaller in outer diameter than an outer diameter of the upper end of the curved surface portion is provided between the seating surface portion and the curved surface portion,
wherein an inner diameter of the valve seat is larger than an outer diameter of the lower end of the seating surface portion, and the outer diameter of the lower end of the seating surface portion is larger than an outer diameter of an upper end of the curved surface portion.

US Pat. No. 10,309,546

ELECTRICALLY OPERATED VALVE

FUJIKOKI CORPORATION, To...

1. An electrically operated valve comprising:a valve main body with a tubular base body in which a valve chamber is defined in an inner portion and a first opening and a second opening are formed in a side portion and a bottom portion, respectively;
a valve seat member which has a valve port open to said valve chamber and a valve seat and is provided in said second opening of said valve main body;
an axially symmetric valve body which is arranged in said valve chamber so as to be movable up and down; and
an elevation drive portion which moves up and down said valve body in relation to said valve seat,
wherein a porous body is arranged along a portion which is positioned in a side portion of said valve port along an inner wall surface of said valve main body, and
wherein said porous body is formed into a C-shaped cross section arranged coaxially to the tubular base body of the valve main body and to the valve body, wherein the porous body is cut out in a portion between ends of the C-shaped cross section to form an opening between the ends of the C-shaped cross section in a way such that a fluid is able to pass through the opening so as to not inhibit flow of the fluid between said side portion and the valve port, and
wherein the opening of the porous body faces said first opening over a whole in an elevating direction of said valve body to provide said C-shaped cross section defined by a section plane orthogonal to the elevating direction of the valve body.

US Pat. No. 10,190,809

ACCUMULATOR

FUJIKOKI CORPORATION, To...

1. An accumulator comprising:a tank having an inflow port and an outflow port therein, the tank having a depth in an axial direction and being configured to store a liquid inside including liquid phase refrigerant and oil accumulated in the tank;
an outflow pipe arranged in the tank in alignment with the outflow port; and
lines of first protrusions formed to run spirally or straight in the axial direction around an outer peripheral surface of the outflow pipe within an axial range extensive along the outflow pipe within which a phase surface separating the liquid-phase refrigerant and the oil accumulated in the tank of the accumulator is located.

US Pat. No. 10,215,654

PRESSURE DETECTION UNIT AND PRESSURE SENSOR USING THE SAME

FUJIKOKI CORPORATION, To...

1. A pressure detection unit comprising:a base formed in a lid shape and made of ceramic;
a receiving member formed in a plate shape;
a diaphragm interposed between the base and the receiving member;
a semiconductor type pressure detection device installed on a side of a pressure receiving space formed between the base and the diaphragm in the base; and
terminal pins electrically connected to the semiconductor type pressure detection device, the terminal pins penetrating the base,
wherein a first brazing portion is formed between the base and the terminal pins,
a metal layer is provided in a region around the semiconductor type pressure detection device on a surface of the base on the side of the pressure receiving space,
the pressure receiving space is filled with a liquid medium having an insulating property,
a ring member is further interposed between the base and the diaphragm,
the diaphragm is interposed between the receiving member and the ring member,
a second brazing portion is formed between the base and the ring member, and
the receiving member and the ring member are integrated by welding.

US Pat. No. 10,330,214

CONTROL VALVE

FUJIKOKI CORPORATION, To...

1. A control valve comprising:a valve body which is provided with a main valve chamber and first and second inlet/outlets and in which a bottom portion opening and first and second side portion openings are opened to the main valve chamber;
a main valve body which is disposed in the main valve chamber to be elevatable relative to the bottom portion opening in order to control a flow rate of a fluid flowing in the bottom portion opening; and
an elevation drive source which elevates the main valve body relative to the bottom portion opening,
wherein differential pressure valves operated in response to a front/rear differential pressure are respectively disposed between the first inlet/outlet and the first side portion opening, between the second inlet/outlet and the second side portion opening, between the first inlet/outlet and the bottom portion opening, and between the second inlet/outlet and the bottom portion opening inside the valve body so that a fluid pressure acting on the main valve body becomes the same in a flow in both directions including one direction from the first inlet/outlet to the second inlet/outlet through the main valve chamber and the other direction from the second inlet/outlet to the first inlet/outlet through the main valve chamber.

US Pat. No. 10,215,461

ACCUMULATOR

FUJIKOKI CORPORATION, Se...

1. An accumulator comprising:a tank having an inflow port and an outflow port therein, the tank being configured to store a liquid inside including liquid-phase refrigerant and oil accumulated in the tank; and
a double-pipe structured outflow pipe arranged in the tank, the double-pipe structured outflow pipe including an inner pipe joined to the outflow port and an outer pipe disposed radially outside of the inner pipe, the outer pipe having a length extended in axial direction inside the tank so that the outer pipe is at least partially submerge in the liquid stored in the tank, wherein
a cloth-like member or a foam material is externally attached around the outer pipe along an entirety of the length of the outer pipe, the cloth-like member or the form material having an inner surface facing the outer pipe and an outer surface, opposite to the inner surface, being exposed to and in contact with the liquid-phase refrigerant stored in the tank, wherein the cloth-like member or the foam material functions to slow down vaporization of the liquid-phase refrigerant stored in the tank and prevent the liquid-phase refrigerant in the tank from explosively evaporating.

US Pat. No. 10,260,978

PRESSURE DETECTION UNIT AND PRESSURE SENSOR USING THE SAME

FUJIKOKI CORPORATION, To...

1. A pressure detection unit comprising:a base formed in a lid shape and made of ceramic;
a receiving member formed in a plate shape;
a diaphragm interposed between the base and the receiving member;
a semiconductor type pressure detection device installed on a side of a pressure receiving space formed between the base and the diaphragm in the base; and
a terminal pin electrically connected to the semiconductor type pressure detection device, the terminal pin penetrating the base;
wherein:
a ring member is further interposed between the base and the diaphragm,
a second brazing portion is formed between the base and the ring member,
the diaphragm is interposed between the receiving member and the ring member, and the diaphragm, the receiving member and the ring member are integrated by welding, and
the sealed pressure receiving space is filled with a liquid medium.

US Pat. No. 10,260,979

PRESSURE DETECTION UNIT, PRESSURE SENSOR USING THE SAME, AND METHOD OF MANUFACTURING PRESSURE DETECTION UNIT

FUJIKOKI CORPORATION, To...

1. A pressure detection unit comprising:a base formed in a lid shape and made of ceramic;
a receiving member formed in a plate shape;
a diaphragm interposed between said base and said receiving member;
a semiconductor type pressure detection device installed on a side of a pressure receiving space formed between said base and said diaphragm in said base; and
three terminal pins electrically connected to said semiconductor type pressure detection device, said terminal pins penetrating said base,
wherein said three terminal pins include an earth terminal pin, a power input terminal pin, and a signal output terminal pin,
wherein a first brazing portion is formed between said base and said three terminal pins,
wherein a ring member is further interposed between said base and said diaphragm,
wherein a second brazing portion is formed between said base and said ring member,
wherein the diaphragm is interposed between the receiving member and the ring member, and the diaphragm, the receiving member, and the ring member are integrated by welding, and
wherein the pressure receiving space is sealed and filled with a liquid medium.

US Pat. No. 9,525,373

STEPPING MOTOR AND MOTORIZED VALVE USING IT

FUJIKOKI CORPORATION, (J...

1. A stepping motor motorized valve comprising;
a valve main body having a valve chamber and a valve port opening to the valve chamber,
a valve body disposed movably up and down in the valve chamber for opening and closing the valve port, said valve body being
driven by a stepping motor,

the stepping motor comprising a stator and a rotor rotationally driven by the stator, the valve body being attached to the
rotor,

a detection rotor attached to the rotor for detecting a rotation position of the rotor,
wherein the detection rotor is rotatably disposed on a co-axial center with the rotor, and rotationally driven by the rotor
via a rotation drive mechanism provided between the rotor and the detection rotor, and

wherein the rotation drive mechanism has a drive play angle in a rotation direction of the rotor to such an extent as to allow
the detection rotor to be moved in a direction opposite to the rotation direction of the rotor, when the detection rotor is
rotated by the rotor;

a conversion mechanism for converting rotational movement of the rotor of the stepping motor to the up and down movement of
the valve body, and

a rotation stop mechanism for stopping the rotation of the rotor in one direction, when the rotor is rotated by the stator
in said one direction and the valve body is moved up and down by the conversion mechanism to reach a predetermined position,

wherein said angle of the drive play is defined to be equal to or greater than an angle to which the rotor is attracted in
a direction opposite to said one direction due to change in magnetic pole of the stator by a subsequent drive pulse signal,
when rotation of the rotor in said one direction is stopped by the rotation stop mechanism.