Patents by Inventor Ryousuke Dohi

Ryousuke Dohi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210356346
    Abstract: A pressure sensor includes a cylindrical member configured to be attached to a body having a fluid passage, and a pressure sensor unit connected to the cylindrical member for detecting a pressure of a fluid flowing through the fluid passage, wherein the cylindrical member is made of a nickel-molybdenum-chromium alloy material or a stainless steel material, wherein the pressure sensor unit includes a sensor body closed at one end with a diaphragm and a pressure detecting element for outputting displacement of the diaphragm as pressure, and wherein the sensor body is made of a cobalt-nickel alloy material, and is connected at an opening side end portion to one end portion of the cylindrical member.
    Type: Application
    Filed: October 2, 2019
    Publication date: November 18, 2021
    Applicant: FUJIKIN INCORPORATED
    Inventors: Atsushi HIDAKA, Takatoshi NAKATANI, Nobukazu IKEDA, Kouji NISHINO, Ryousuke DOHI
  • Patent number: 11149871
    Abstract: Provided is a flow rate adjustment valve of a motor-operated valve type, which overcomes the problems that flow rate adjustment valves of a manual valve type have, while making full use of compactness the manual valves have. The flow rate adjustment valve includes a rotation device that rotates a rotation member to cause a vertically movable body to move vertically. The rotation device includes: a driven gear disposed at an upper end portion of the rotation member; and a motor that rotates a driving gear engaged with the driven gear. The motor, which is a stepping servo motor, is disposed below the driving gear and has a rotary shaft extending upward. The driving gear is fixed to an upper end portion of the rotary shaft.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: October 19, 2021
    Assignee: FUJIKIN INCORPORATED
    Inventors: Ryousuke Dohi, Taiji Chiba, Kazunari Watanabe
  • Publication number: 20210239230
    Abstract: A piezoelectric element-driven valve 1 including a main body, a valve element, piezoelectric actuators, a plurality of cylindrical actuator boxes arranged in series, a cylindrical outer connecting jig detachably connecting the adjacent actuator boxes and having an opening for drawing out wiring, a plurality of piezoelectric actuators accommodated in the actuator box respectively in the same direction, and a cylindrical inner connecting jig slidably accommodated in the outer connecting jig and having an opening for positioning the adjacent piezoelectric actuators and drawing out wiring.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Applicant: FUJIKIN INCORPORATED
    Inventors: Ryousuke DOHI, Kaoru HIRATA, Katsuyuki SUGITA, Koji KAWADA, Kouji NISHINO, Nobukazu IKEDA
  • Patent number: 11079774
    Abstract: A flow rate control device (100) comprises: a pressure control valve (6) provided in a flow path; a flow rate control valve (8) provided downstream side of the pressure control valve; and a first pressure sensor (3) for measuring pressure on the downstream side of the pressure control valve and on the upstream side of the flow rate control valve. The flow rate control valve has a valve element (13) seated on/separated from a valve seat (12); a piezoelectric element (10b) for moving the valve element so as be seated on/separated from the valve seat; and a strain sensor (20) provided on a side surface of the piezoelectric element. The pressure control valve (6) is configured to control the pressure control valve (6) on the basis of a signal output from the first pressure sensor (3), and to control the driving of the piezoelectric element of the flow rate control valve (8) based on a signal output from the strain sensor (20).
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: August 3, 2021
    Assignee: FUJIKIN INCORPORATED
    Inventors: Katsuyuki Sugita, Ryousuke Dohi, Kaoru Hirata, Koji Kawada, Nobukazu Ikeda, Kouji Nishino
  • Patent number: 11054052
    Abstract: A piezoelectric-element-driven valve includes a valve seat provided on a flow path, a valving element detachably seated on the valve seat, and a piezoelectric element, and is configured to move the valve body by extension of the piezoelectric element. The piezoelectric-element-driven valve also is provided with a detection mechanism for detecting an extension amount of the piezoelectric element, the detection mechanism including a strain sensor, and being capable of detecting an movement amount of the valving element from an output of the strain sensor.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: July 6, 2021
    Assignee: FUJIKIN INCORPORATED
    Inventors: Ryousuke Dohi, Kaoru Hirata, Katsuyuki Sugita, Koji Kawada, Kouji Nishino, Nobukazu Ikeda
  • Publication number: 20200370671
    Abstract: A control device for a valve device can detect open/close state of the valve device without using limit switches. The valve device includes a diaphragm for opening and closing a flow path for flowing a fluid, a coil spring for biasing the diaphragm in the closing direction of flow path, a main actuator for driving it against the biasing force of the coil spring, and an adjusting actuator using a piezoelectric element for adjusting the opening degree of the flow path determined by the diaphragm. The controller detects the open/close state of flow path based on the voltage generated by the piezoelectric element of the adjusting actuator, and controls valve device using the detection signal.
    Type: Application
    Filed: November 12, 2018
    Publication date: November 26, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Masahiko TAKIMOTO, Toshihide YOSHIDA, Kenta KONDO, Ryousuke DOHI, Kouji NISHINO
  • Publication number: 20200348704
    Abstract: A flow rate control device (100) comprises: a pressure control valve (6) provided in a flow path; a flow rate control valve (8) provided downstream side of the pressure control valve; and a first pressure sensor (3) for measuring pressure on the downstream side of the pressure control valve and on the upstream side of the flow rate control valve. The flow rate control valve has a valve element (13) seated on/separated from a valve seat (12); a piezoelectric element (10b) for moving the valve element so as be seated on/separated from the valve seat; and a strain sensor (20) provided on a side surface of the piezoelectric element. The pressure control valve (6) is configured to control the pressure control valve (6) on the basis of a signal output from the first pressure sensor (3), and to control the driving of the piezoelectric element of the flow rate control valve (8) based on a signal output from the strain sensor (20).
    Type: Application
    Filed: November 20, 2018
    Publication date: November 5, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Katsuyuki SUGITA, Ryousuke DOHI, Kaoru HIRATA, Koji KAWADA, Nobukazu IKEDA, Kouji NISHINO
  • Publication number: 20200348158
    Abstract: A self-diagnosis method of a flow rate control device includes: a step (a) for measuring a pressure drop characteristic after a pressure control valve (6) has been changed to a closed state from a state where a fluid flows from the upstream side of the pressure control valve with the opening of a flow rate control valve (8) is larger than a restriction part; a step (b) for measuring the pressure drop characteristic after the pressure control valve has been changed to the closed state from a state where the fluid flows from the upstream side of the flow rate control valve to the downstream side with the opening of the flow rate control valve is smaller than the restriction part; a step (c) for determining whether there is an abnormality by comparing the pressure drop characteristic measured in step (a) with a corresponding reference pressure drop characteristic; a step (d) for determining whether there is an abnormality by comparing the pressure drop characteristic measured in step (b) with a corresponding ref
    Type: Application
    Filed: November 20, 2018
    Publication date: November 5, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Katsuyuki SUGITA, Ryousuke DOHI, Kaoru HIRATA, Koji KAWADA, Nobukazu IKEDA, Kouji NISHINO
  • Patent number: 10711902
    Abstract: A valve element movement mechanism includes: a first valve stem having one end portion to which a first valve element to close and open an area between one of the large diameter portion and the small diameter portion is fixed; a second valve stem having one end portion to which a second valve element to close and open an area between the other of the large diameter portions and the small diameter portion is fixed; a first bellows having one end portion fixed to a first bellows flange and the other end portion fixed to the first valve element; a second bellows having one end portion fixed to a second bellows flange and the other end portion fixed to the second valve element; a frame disposed outside the main passage; and an actuator to move the frame in the directions in which valve elements are closed and opened.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: July 14, 2020
    Assignee: FUJIKIN INCORPORATED
    Inventors: Tsuyoshi Tanikawa, Keisuke Ishibashi, Tadayuki Yakushijin, Michio Yamaji, Ryousuke Dohi, Yoshinori Shimomura, Takashi Funakoshi
  • Publication number: 20200124064
    Abstract: To provide a flow rate regulating valve capable of detecting a state where a flow path is fully closed even when there is no lead wire or the like for detecting the state where the flow path is fully closed. A flow rate regulating valve is a fluid regulating valve including a valve body for opening and closing fluid flow paths provided in a body and includes an actuator unit for moving the valve body, and the actuator unit includes a drive motor, a slider moved by a rotation of the motor, a cylindrical body mounted on the slider, and a shaft interlocked with the cylindrical body and provided with the valve body fixed to a distal end thereof. The motor is a stepping servomotor, and has a pressing control function for moving the valve body in the closing direction at a continuous rated torque.
    Type: Application
    Filed: April 24, 2018
    Publication date: April 23, 2020
    Inventors: Keigo Kobayashi, Masakazu Nagao, Tadayuki Yakushijin, Ryousuke Dohi
  • Patent number: 10573801
    Abstract: A piezoelectric linear actuator comprising a laminated piezoelectric actuator having a cylindrical shape; a lower support member supporting the laminated piezoelectric actuator and extending laterally to the left and right of the laminated piezoelectric actuator; a pair of displacement transfer members extending along the left and right sides of the laminated piezoelectric actuator, respectively, to slidably intersect the lower support member and transferring displacement due to the piezoelectric effect of the laminated piezoelectric actuator; and an output part locked to the pair of displacement transfer members below the lower support member and coupling lower end portions of the displacement transfer members, wherein the pair of displacement transfer members are formed to have a width dimension that is the same or substantially the same as the width dimension of the laminated piezoelectric actuator.
    Type: Grant
    Filed: August 9, 2016
    Date of Patent: February 25, 2020
    Assignee: FUJIKIN INCORPORATED
    Inventors: Kohei Shigyou, Takashi Hirose, Kouji Nishino, Ryousuke Dohi, Naofumi Yasumoto
  • Publication number: 20200018413
    Abstract: A piezoelectric-element-driven valve includes a valve seat provided on a flow path, a valving element detachably seated on the valve seat, and a piezoelectric element, and is configured to move the valve body by extension of the piezoelectric element. The piezoelectric-element-driven valve also is provided with a detection mechanism for detecting an extension amount of the piezoelectric element, the detection mechanism including a strain sensor, and being capable of detecting an movement amount of the valving element from an output of the strain sensor.
    Type: Application
    Filed: December 22, 2017
    Publication date: January 16, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Ryousuke DOHI, Kaoru HIRATA, Katsuyuki SUGITA, Koji KAWADA, Kouji NISHINO, Nobukazu IKEDA
  • Patent number: 10534376
    Abstract: A gas divided flow supplying apparatus, including a control valve 3, a pressure type flow control unit 1a connected to a process gas inlet 11, a gas supply main pipe 8 connected to the downstream side of control valve 3, a plurality of branched pipe passages 9a, 9n connected in parallel to the downstream side of main pipe 8, opening and closing valves 10a, 10n interposed in the respective branched pipe passages 9a, 9n, orifices 6a, 6n provided on the downstream sides of valves 10a, 10n, a temperature sensor 4 provided near the process gas passage between the control valve 3 and the orifices 6a, 6n, a pressure sensor 5 provided in the process gas passage between the control valve 3 and the orifices 6a, 6n, divided gas flow outlets 11a, 11n provided on the outlet sides of the orifices 6a, 6n, and an arithmetic and control unit 7.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: January 14, 2020
    Assignee: FUJIKIN INCORPORATED
    Inventors: Kouji Nishino, Ryousuke Dohi, Kaoru Hirata, Katsuyuki Sugita, Nobukazu Ikeda
  • Publication number: 20190316703
    Abstract: Provided is a flow rate adjustment valve of a motor-operated valve type, which overcomes the problems that flow rate adjustment valves of a manual valve type have, while making full use of compactness the manual valves have. The flow rate adjustment valve includes a rotation device that rotates a rotation member to cause a vertically movable body to move vertically. The rotation device includes: a driven gear disposed at an upper end portion of the rotation member; and a motor that rotates a driving gear engaged with the driven gear. The motor, which is a stepping servo motor, is disposed below the driving gear and has a rotary shaft extending upward. The driving gear is fixed to an upper end portion of the rotary shaft.
    Type: Application
    Filed: October 25, 2017
    Publication date: October 17, 2019
    Inventors: Ryousuke Dohi, Taiji Chiba, Kazunari Watanabe
  • Patent number: 10385998
    Abstract: Passage members each have a required width, a required height, and a required length, and are provided at middle portions in the width direction with fluid passages, respectively. As coupling means, two bolts are used. The middle portion in the width direction of each of the passage members has opposite end portions that are each provided with a female screw and a bolt insertion hole to be faced by the female screw, respectively. The upper bolt is inserted into one of the passage members and is screwed into the female screw of the other passage member. The lower bolt is inserted into the other passage member and is screwed into the female screw of the one of the passage members. The passage members are coupled with use of the two upper and lower bolts whereby a seal member is securely fixed.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: August 20, 2019
    Assignee: FUJIKIN INCORPORATED
    Inventors: Kohei Shigyou, Takashi Hirose, Kouji Nishino, Ryousuke Dohi, Naofumi Yasumoto
  • Patent number: 10386861
    Abstract: A pressure type flow control system with flow monitoring includes an inlet, a control valve including a pressure flow control unit connected downstream of the inlet, a thermal flow sensor connected downstream of the control valve, an orifice installed on a fluid passage communicatively connected downstream of the thermal flow sensor, a temperature sensor provided near the fluid passage between the control valve and orifice, a pressure sensor provided for the fluid passage between the control valve and orifice, an outlet communicatively connected to the orifice, and a control unit including a pressure type flow rate arithmetic and control unit receiving a pressure signal from the pressure sensor and a temperature signal from the temperature sensor, and a flow sensor control unit to which a flow rate signal from the thermal flow sensor is input.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: August 20, 2019
    Assignee: Fujikin Incorporated
    Inventors: Kaoru Hirata, Ryousuke Dohi, Kouji Nishino, Nobukazu Ikeda, Katsuyuki Sugita
  • Patent number: 10386863
    Abstract: A pressure-type flow controller includes a main body provided with a fluid channel between a fluid inlet and a fluid outlet and an exhaust channel between the fluid channel and an exhaust outlet; a pressure control valve fixed to the fluid inlet of the main body for opening/closing the upstream side of the fluid channel; a pressure sensor for detecting the internal pressure of the fluid channel on the downstream side of the pressure control valve; an orifice provided in the fluid channel on the downstream side of the point of branching of the exhaust channel; and an exhaust control valve for opening/closing the exhaust channel.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: August 20, 2019
    Assignee: FUIIKIN INCORPORATED
    Inventors: Kaoru Hirata, Nobukazu Ikeda, Kouji Nishino, Ryousuke Dohi, Katsuyuki Sugita
  • Patent number: 10372145
    Abstract: A pressure-type flow rate controller includes a body provided with a fluid passage which communicates a fluid inlet and a fluid outlet, a control valve for pressure control fixed to the body to open and close the fluid passage, an orifice arranged in the course of the fluid passage on the downstream side of the control valve, and a pressure sensor fixed to the body to detect the internal pressure of the fluid passage between the control valve and the orifice, wherein the fluid passage comprises a first passage portion communicating the control valve and a pressure detection chamber provided on a pressure detection surface of the pressure sensor, and a second passage portion spaced away from the first passage portion and communicating the pressure detection chamber and the orifice.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: August 6, 2019
    Assignee: Fujikin Incorporated
    Inventors: Takashi Hirose, Toshihide Yoshida, Atsushi Matsumoto, Kaoru Hirata, Nobukazu Ikeda, Kouji Nishino, Ryousuke Dohi, Katsuyuki Sugita
  • Patent number: 10309561
    Abstract: A flow passage sealing structure for omitting a process of welding or caulking an orifice plate and a filter plate to an orifice base and a filter base as base materials and allowing further miniaturization, includes a main block (1) including main flow passages (1a, 1b), recessed portions (12, 13) provided in side surfaces of the main block and having female screws in inner peripheral surfaces, thin plates (6, 8) abutting against the bottom surfaces of the recessed portions and having through holes, gasket rings (16, 17) abutting against the thin plates (6, 8), pressing pipelines (20, 21) having large-diameter portions and internal flow passages communicable with the main flow passages (1a, 1b) and abutting against the gasket rings, and fastening screws (22) abutting against the large-diameter portions and pressing the pressing pipelines by being inserted around the outside of the pressing pipelines and screwed into the female screws.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: June 4, 2019
    Assignee: FUJIKIN INCORPORATED
    Inventors: Ryousuke Dohi, Naofumi Yasumoto, Kouji Nishino, Nobukazu Ikeda
  • Patent number: D879248
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: March 24, 2020
    Assignee: FUJIKIN INCORPORATED
    Inventors: Kohei Shigyou, Takashi Hirose, Kouji Nishino, Ryousuke Dohi, Naofumi Yasumoto