Patents Assigned to Fujikoki Corporation
  • Patent number: 10480704
    Abstract: A pulsation damper includes an upper diaphragm, a lower diaphragm configured to form a sealed space having a predetermined pressure with the upper diaphragm, in which an inert gas is filled; and a deformation suppressing member formed of an elastic material, and comprising an inner cylindrical portion, and an extension portion extending from a center portion on an outer peripheral surface of the inner cylindrical portion such that the extension portion extends outward from a center axis of the inner cylindrical portion, wherein the deformation suppressing member is arranged inside the sealed space such that an outer periphery of the extension portion abuts against inner walls of the upper diaphragm and the lower diaphragm.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: November 19, 2019
    Assignees: FUJIKOKI CORPORATION, DENSO CORPORATION
    Inventors: Shin Yoshida, Takao Okada, Makoto Sudo, Osamu Hishinuma, Hiroatsu Yamada
  • Patent number: 10480466
    Abstract: A diaphragm includes a flange and a protrusion provided to protrude to one side of the flange, wherein the protrusion has at least two annular curved portions provided annularly on a ceiling portion having a flat surface-like shape and an outer side in a radial direction of the ceiling portion, in a state where pressure on an outer wall side of the protrusion and pressure on an inner wall side of the protrusion are the same, the at least two annular curved portions are each formed to be curved in a cross-section of the diaphragm obtained by cutting the diaphragm by a virtual plane including a center line of the diaphragm, the centers of curvature of the curved portions being arranged at different positions on a side opposite to a protruding direction of the protrusion, and the diaphragm is formed of a sheet metal.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: November 19, 2019
    Assignees: FUJIKOKI CORPORATION, DENSO CORPORATION
    Inventors: Masahiro Tomitsuka, Shin Yoshida, Makoto Sudo, Akinori Nanbu, Osamu Hishinuma, Hiroatsu Yamada
  • Publication number: 20190331104
    Abstract: Provided are a variable-capacity compressor control valve with a reduced number of component machining steps, a reduced machining cost, a reduced number of components, and a reduced number of assembly steps as well as reduced sizes of components, and with a simple configuration that can adjust the bellows attachment length and can secure airtightness, and a method for assembling such a control valve. A closure member, which is adapted to close an upper-portion opening of a cylindrical stator on the side opposite to an attractor, is press-fitted into the upper-portion opening and welded therein.
    Type: Application
    Filed: April 20, 2017
    Publication date: October 31, 2019
    Applicant: Fujikoki Corporation
    Inventors: Yoshiyuki KUME, Hisashi ASANO, Masaki OHKUMA, Masaharu ITOH
  • Publication number: 20190316697
    Abstract: Provided is a variable-capacity compressor control valve with a simple configuration that can secure the size of a sub valve element portion of a sub valve element, which is adapted to open or close an in-valve release passage, and can improve the actuation property and reduce the size of the control valve. The sub valve element (17) is integrated with the plunger (37) for moving the main valve element (15) in the direction to open or close a valve orifice so that the sub valve element (17) always moves together with the plunger (37). The sub valve element (17) is securely inserted in the plunger (37).
    Type: Application
    Filed: April 20, 2017
    Publication date: October 17, 2019
    Applicant: Fujikoki Corporation
    Inventors: Yoshiyuki KUME, Hisashi ASANO, Takashi SAKAMOTO, Masaharu ITOH
  • Patent number: 10436484
    Abstract: A caulking fixation type power element has a diaphragm, an upper lid member forming a pressure actuation chamber with a working gas, a receiving member provided with a through hole in its center portion and arranged in an opposite side to the upper lid member in relation to the diaphragm, and a stopper member arranged in a lower space formed between the diaphragm and the receiving member, and is integrated according to a circumferential welding by lapping the upper lid member, the diaphragm and the receiving member, the stopper member has a main body portion inserted to the through hole of the receiving member, and a flange portion having a larger diameter than the through hole and formed in one end of the main body portion, and the flange portion is arranged so as to come into contact with the receiving member from the lower space side.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: October 8, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Ryo Matsuda, Junya Hayakawa
  • Publication number: 20190293061
    Abstract: Provided is a variable-capacity compressor control valve with a simple configuration that can increase the attraction force of an electromagnetic actuator and thus can reduce the size of the control valve. A sub valve element that is a magnetic body made of the same magnetic material as or a different magnetic material from that of a plunger, which is adapted to move a main valve element in the direction to open or close the valve orifice, is fitted in and fixed to the plunger.
    Type: Application
    Filed: April 20, 2017
    Publication date: September 26, 2019
    Applicant: Fujikoki Corporation
    Inventors: Yoshiyuki KUME, Hisashi ASANO, Takashi SAKAMOTO, Masaharu ITOH
  • Publication number: 20190226734
    Abstract: Provided is an accumulator that can effectively suppress impact noise associated with a bumping phenomenon when a compressor is operating, without an increase in the complexity, cost, or size of the accumulator. An inlet port 15 is disposed in the lower portion of a tank 10, and a gas-liquid separation accelerating plate 22 is disposed above inlet port 15 inside the tank 10 so that the gas-liquid separation accelerating plate 22 is opposite the inlet port 15.
    Type: Application
    Filed: September 28, 2017
    Publication date: July 25, 2019
    Applicant: Fujikoki Corporation
    Inventors: Kouji HOSOKAWA, Takeharu OZAWA
  • Publication number: 20190225055
    Abstract: Provided is a refrigerant container having a rational structure with a small number of components, the container having both the functions of a receiver and an accumulator. Specifically, the refrigerant container includes a tank 10 capable of temporarily storing a refrigerant; and a gas/liquid inlet port 15, a liquid-phase outlet port 16, and a gas-phase outlet port 17 that are provided in an upper portion of the tank 10. The refrigerant container 1 is adapted to separate a refrigerant introduced through the gas/liquid inlet port 15 into a liquid-phase refrigerant and a gas-phase refrigerant, and has the function of a receiver that guides only the liquid-phase refrigerant after the separation to the side of an expansion valve via the liquid-phase outlet port 16, and the function of an accumulator that guides the gas-phase refrigerant after the separation to the suction side of a compressor via the gas-phase outlet port 17 together with oil contained in the liquid-phase refrigerant.
    Type: Application
    Filed: October 17, 2017
    Publication date: July 25, 2019
    Applicant: Fujikoki Corporation
    Inventors: Kouji HOSOKAWA, Takeharu OZAWA
  • Publication number: 20190226467
    Abstract: Provided is a variable-capacity compressor control valve that is compact and is capable of suppressing the influence of the pressure difference between the crank chamber pressure Pc, the suction pressure Ps, and the like. A valve body includes an in-valve release passage for releasing a pressure Pc in a crank chamber to a suction chamber of a compressor via a Ps inlet/outlet port. A sub valve element adapted to open or close the in-valve release passage along with movement of the plunger is provided.
    Type: Application
    Filed: July 5, 2017
    Publication date: July 25, 2019
    Applicant: Fujikoki Corporation
    Inventors: Yoshiyuki KUME, Hisashi ASANO, Takashi SAKAMOTO, Masaharu ITOH
  • Patent number: 10352475
    Abstract: The invention provides an electrically operated valve which can more accurately detect a position of a valve body. An electrically operated valve is provided with a valve shaft, a valve body, a rotor member which is movable together with the valve shaft in a parallel direction to a first direction, a stator member which applies a turning force to the rotor member, a permanent magnet member which turns together with the rotor member, an angle sensor which detects an angle of rotation of the permanent magnet, and a guide member which guides a relative movement of the rotor member or the valve shaft in relation to the permanent magnet member. A distance between the permanent magnet and the angle sensor is fixed when the permanent magnet member turns.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: July 16, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Satoshi Uehara, Bunta Narukawa
  • Patent number: 10344872
    Abstract: An electric valve includes a seating surface portion attached to a valve seat and a curved surface portion inserted into a valve port that are disposed in a valve body. A constricted surface portion smaller in outer diameter than an upper end portion of the curved surface portion is provided between the seating surface portion and the curved surface portion. As a result, a rising flow rate can be sufficiently reduced and controllability in a low flow range can be effectively improved with management of the rising flow rate simplified.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: July 9, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Masashi Yazawa, Tatsuya Yoshida, Tomokazu Kiuchi
  • Patent number: 10330214
    Abstract: [Object] Provided is a control valve capable of ensuring controllability in both flows without increasing the number of parts. [Solving Means] A plurality of differential pressure valves 50, 60, 70, and 80 are disposed inside a valve body 10 so that a fluid pressure acting on a main valve body 20 disposed inside a main valve chamber 13 becomes the same in a flow of both directions including one direction from a first inlet/outlet 11 to a second inlet/outlet 12 through the main valve chamber 13 and the other direction from the second inlet/outlet 12 to the first inlet/outlet 11 through the main valve chamber 13.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 25, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventor: Bunta Narukawa
  • Patent number: 10309546
    Abstract: An electrically operated valve is provided with a valve main 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, a valve seat member which has an valve port open to the valve chamber and a valve seat and is provided in the second opening of the valve main body, a valve body which is arranged in the valve chamber so as to be movable up and down, and an elevation drive portion which moves up and down the valve body in relation to the valve seat, and a porous body constructed by a foam metal is arranged along a portion which is positioned in a side portion of the valve port on the inner wall surface of the valve main body. Accordingly, an abnormal noise can be reduced.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: June 4, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Takao Harada, Kensuke Tabuchi, Takenori Nobuki
  • Publication number: 20190160918
    Abstract: Provided is a refrigerant container having a rational structure with a small number of components, the container having both the functions of a receiver and an accumulator. Specifically, the refrigerant container includes a tank 10 capable of temporarily storing a refrigerant; and a gas/liquid inlet port 15, a liquid-phase outlet port 16, and a gas-phase outlet port 17 that are provided in a lower portion of the tank 10. The refrigerant container 1 is adapted to separate a refrigerant introduced through the gas/liquid inlet port 15 into a liquid-phase refrigerant and a gas-phase refrigerant, and has the function of a receiver that guides only the liquid-phase refrigerant after the separation to the side of an expansion valve via the liquid-phase outlet port 16, and the function of an accumulator that guides the gas-phase refrigerant after the separation to the suction side of a compressor via the gas-phase outlet port 17 together with oil contained in the liquid-phase refrigerant.
    Type: Application
    Filed: October 17, 2017
    Publication date: May 30, 2019
    Applicant: Fujikoki Corporation
    Inventors: Kouji HOSOKAWA, Takeharu OZAWA
  • Publication number: 20190154168
    Abstract: Provided is a variable-capacity compressor control valve that can secure the attraction force of an electromagnetic actuator and can improve the actuation property without increasing the body size. A sub valve element or a cylindrical upper end portion thereof, which is a magnetic body made of the same magnetic material as or a different magnetic material from that of a plunger, is fixed to the inner periphery of the upper end portion of the plunger that is opposite an attractor.
    Type: Application
    Filed: April 20, 2017
    Publication date: May 23, 2019
    Applicant: Fujikoki Corporation
    Inventors: Yoshiyuki KUME, Hisashi ASANO, Takashi SAKAMOTO, Masaharu ITOH
  • Patent number: 10260978
    Abstract: A pressure detection unit includes a pressure receiving structure including a ring-shaped ring member, a receiving member facing the ring member, and a diaphragm interposed between the ring member and the receiving member, a base made of ceramic joined to the ring member to form a pressure receiving space between the base and the diaphragm, a semiconductor type pressure detection device installed on a side of the pressure receiving space of the base, and a terminal pin which is electrically connected to the semiconductor type pressure detection device and penetrates the base.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: April 16, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Tomohisa Aoyama, Motohisa Mukai, Youko Tamura
  • Patent number: 10260979
    Abstract: [Object] Provided are a pressure detection unit and a pressure sensor using the same capable of performing a trimming operation using a simple structure during an assembly operation, and reducing a decrease in detection accuracy of a semiconductor type pressure detection device. [Solving Means] A pressure detection unit includes 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 three terminal pins electrically connected to the semiconductor type pressure detection device, the terminal pins penetrating the base, wherein the three terminal pins include an earth terminal pin, a power input terminal pin, and a signal output terminal pin.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: April 16, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Tomohisa Aoyama, Motohisa Mukai, Youko Tamura
  • Patent number: 10215461
    Abstract: Provided is an accumulator capable of effectively suppressing a bumping phenomenon and the following impact noise during the starting of a compressor without making the structure of the accumulator complicated or increasing the cost and the size thereof, and so having cost-effectiveness. An accumulator includes: a tank 10 having an inflow port 15 and an outflow port 16; and a double-pipe structured outflow pipe 30 including an inner pipe 31 joined to the outflow port 16 and hanging inside of the tank 10, and an outer pipe 32 disposed outside of the inner pipe 31. A cloth-like member such as felt or a foam material 60 is wound around or externally inserted to the outer pipe 32.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: February 26, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventor: Kouji Hosokawa
  • Patent number: 10215654
    Abstract: A pressure detection unit and a pressure sensor using the same capable of suppressing an increase in manufacturing man-hours due to use of an additional member, and ensuring insulation of a semiconductor type pressure detection device. The pressure detection unit includes 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 penetrate the base, where 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.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: February 26, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Tomohisa Aoyama, Motohisa Mukai, Youko Tamura
  • Patent number: D850583
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: June 4, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Satoshi Uehara, Yu Ando, Bunta Narukawa