Patents by Inventor Masahiko TAKIMOTO

Masahiko TAKIMOTO 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).

  • Patent number: 10883866
    Abstract: The pressure-type flow rate control device includes: a restriction part interposed in a flow channel; an upstream-side pressure sensor detecting a fluid pressure on the upstream side of the restriction part; a downstream-side pressure sensor detecting a fluid pressure on the downstream side of the restriction part; a flow control valve provided in the flow channel on the upstream side of the upstream-side pressure sensor; and computation control circuit controlling the flow control valve based on detected values of the upstream-side pressure sensor and the downstream-side pressure sensor, thereby controlling the flow. Under conditions where no fluid flow occurs in the flow channel, the computation control circuit computes the difference between the detected value of the upstream-side pressure sensor and the detected value of the downstream-side pressure sensor, and outputs a signal for pressure sensor malfunction determination based on the computed difference.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: January 5, 2021
    Assignee: FUJIKIN INCORPORATED
    Inventors: Katsuyuki Sugita, Kouji Nishino, Kaoru Hirata, Masahiko Takimoto, Nobukazu Ikeda
  • Patent number: 10884436
    Abstract: A flow rate signal correction method applicable to a pressure-type flow rate control device that controls a flow rate by controlling pressure existing upstream of a restriction part includes a step of generating a primary signal indicating the flow rate in accordance with an output of a pressure sensor provided upstream of the restriction part and a step of generating a secondary signal as a corrected signal of the primary signal such that the current value of the primary signal and a value including information regarding one or a plurality of past values of the primary signal are used to derive a current value corrected according to a predetermined relational expression. The secondary signal is output as a flow rate signal during a stable flow rate period, and the secondary signal is not output as a flow rate signal during a transient change period.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: January 5, 2021
    Assignee: FUJIKIN INCORPORATED
    Inventors: Katsuyuki Sugita, Nobukazu Ikeda, Kouji Nishino, Kaoru Hirata, Masahiko Takimoto, Masayoshi Kawashima, Takahiro Imai
  • Publication number: 20200393051
    Abstract: Provided is a valve device which can precisely adjust the flow rate while ensuring the flow rate of the fluid. A valve device includes a main actuator which receives a pressure of a supplied drive fluid and moves an operating member to an open position or closed position; an adjusting actuator arranged to receive at least a part of a force generated by the main actuator and for adjusting the position of the operating member positioned at the open position; and a pressure regulator provided in a feed path of the drive fluid to the main actuator and for regulating the pressure of the supplied drive fluid to suppress fluctuation of the pressure of the drive fluid supplied to the main actuator.
    Type: Application
    Filed: March 9, 2018
    Publication date: December 17, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Kenta KONDO, Toshihide YOSHIDA, Masahiko TAKIMOTO, Tsutomu SHINOHARA, Tomohiro NAKATA, Takeru MIURA, Masahiko NAKAZAWA
  • Publication number: 20200386342
    Abstract: A valve device allows simple flow rate control when the bulb is opened. Valve device includes: a valve body having a first flow path and a second flow path formed therein; a valve body for closing an opening of the first flow path to shut off a gateway between the first flow path and the second flow path and for opening the first flow path to communicate the first flow path and the second flow path; an operating member for moving between a closed position for closing the opening in the valve body and an open position for opening the opening; and an adjusting actuator for defining an open position of the operating member and having an electrically driven material made of a compound that deforms in response to a change in an electric field, and for changing the defined open position by deformation of the electrically driven material.
    Type: Application
    Filed: March 9, 2018
    Publication date: December 10, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Toshihide YOSHIDA, Tsutomu SHINOHARA, Tomohiro NAKATA, Ryutaro TANNO, Kouji NISHINO, Katsuyuki SUGITA, Masahiko TAKIMOTO
  • 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: 20200278234
    Abstract: A valve device is capable of precisely adjusting a flow rate variation with time, aging, or the like without using an external sensor or using as few external sensors as possible. The apparatus includes an adjusting actuator for adjusting the position of the operating member positioned at the open position, a communication unit for receiving adjustment information relating to the adjustment of the opening degree of the flow path by the valve element from the outside of the apparatus, and a control unit for adjusting the position of the operating member by driving the adjusting actuator based on the adjustment information.
    Type: Application
    Filed: September 11, 2018
    Publication date: September 3, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Kenta KONDO, Toshihide YOSHIDA, Hidenobu SATO, Tomohiro NAKATA, Tsutomu SHINOHARA, Masahiko TAKIMOTO
  • Publication number: 20200278033
    Abstract: A valve device is capable of precisely adjusting a flow rate variation due to aging, aging, etc. without using an external sensor. An adjusting actuator includes a piezoelectric element for adjusting the position of the operating member positioned at the open position, and the drive circuit of the adjusting actuator includes a detecting unit for detecting an electric signal related to the amount of strain generated in the piezoelectric element, and a control unit for controlling the adjusting actuator so that the opening degree of the flow path by the valve element becomes the target opening degree based on the electric signal related to the amount of strain of the piezoelectric element.
    Type: Application
    Filed: September 11, 2018
    Publication date: September 3, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Kenta KONDO, Toshihide YOSHIDA, Kenji AIKAWA, Hidenobu SATO, Tomohiro NAKATA, Tsutomu SHINOHARA, Masahiko TAKIMOTO
  • Publication number: 20200033895
    Abstract: A pressure-type flow rate control device includes a restriction part; a control valve provided upstream of the restriction part; an upstream pressure sensor for detecting pressure between the restriction part and the control valve; and an arithmetic processing circuit connected to the control valve and the upstream pressor sensor. The device is configured to perform flow rate control by controlling the control valve according to an output of the upstream pressure sensor. The arithmetic processing circuit performs an operation of closing the control valve in order to reduce a flow rate of a fluid flowing through the restriction part, and performs an operation of closing the control valve by feedback control in which a target value is an exponential function more gradual than the pressure drop characteristic data when a gas flows out of the restriction part.
    Type: Application
    Filed: March 20, 2018
    Publication date: January 30, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Katsuyuki SUGITA, Kaoru HIRATA, Nobukazu IKEDA, Kouji NISHINO, Masahiko TAKIMOTO, Takahiro IMAI, Shinya OGAWA
  • Publication number: 20190368757
    Abstract: A fluid sealing device and a pressure detector calibration device are provided to enable further reducing of errors between a sealing pressure and a set pressure in a fluid flow path.
    Type: Application
    Filed: May 30, 2019
    Publication date: December 5, 2019
    Applicant: FUJIKIN INCORPORATED
    Inventors: Masahiko TAKIMOTO, Masaaki NAGASE
  • Publication number: 20190129452
    Abstract: The fluid controller includes a fluid control module and an external control module. The fluid control module includes a control valve on a flow channel, a valve driver circuit that drives the control valve, a fluid meter on a flow channel, and a first processor that processes a signal output from the fluid meter. The external control module includes a second processor that processes a signal output from the first processor. The second processor outputs a valve control signal according to the signal of the fluid meter output from the first processor, the valve control signal is directly input to the valve driver circuit without through the first processor, and the valve driver circuit outputs a voltage that drives the control valve according to the valve control signal from the second processor.
    Type: Application
    Filed: April 21, 2017
    Publication date: May 2, 2019
    Applicant: FUJIKIN INCORPORATED
    Inventors: Kaoru HIRATA, Katsuyuki SUGITA, Yohei SAWADA, Masahiko TAKIMOTO, Kouji NISHINO
  • Publication number: 20180314271
    Abstract: A flow rate signal correction method applicable to a pressure-type flow rate control device that controls a flow rate by controlling pressure existing upstream of a restriction part includes a step of generating a primary signal indicating the flow rate in accordance with an output of a pressure sensor provided upstream of the restriction part and a step of generating a secondary signal as a corrected signal of the primary signal such that the current value of the primary signal and a value including information regarding one or a plurality of past values of the primary signal are used to derive a current value corrected according to a predetermined relational expression. The secondary signal is output as a flow rate signal during a stable flow rate period, and the secondary signal is not output as a flow rate signal during a transient change period.
    Type: Application
    Filed: October 24, 2016
    Publication date: November 1, 2018
    Applicant: FUJIKIN INCORPORATED
    Inventors: Katsuyuki SUGITA, Nobukazu IKEDA, Kouji NISHINO, Kaoru HIRATA, Masahiko TAKIMOTO, Masayoshi KAWASHIMA, Takahiro IMAI
  • Publication number: 20180283914
    Abstract: The pressure-type flow rate control device includes: a restriction part interposed in a flow channel; an upstream-side pressure sensor detecting a fluid pressure on the upstream side of the restriction part; a downstream-side pressure sensor detecting a fluid pressure on the downstream side of the restriction part; a flow control valve provided in the flow channel on the upstream side of the upstream-side pressure sensor; and computation control circuit controlling the flow control valve based on detected values of the upstream-side pressure sensor and the downstream-side pressure sensor, thereby controlling the flow. Under conditions where no fluid flow occurs in the flow channel, the computation control circuit computes the difference between the detected value of the upstream-side pressure sensor and the detected value of the downstream-side pressure sensor, and outputs a signal for pressure sensor malfunction determination based on the computed difference.
    Type: Application
    Filed: September 15, 2016
    Publication date: October 4, 2018
    Applicant: FUJIKIN INCORPORATED
    Inventors: Katsuyuki SUGITA, Kouji NISHINO, Kaoru HIRATA, Masahiko TAKIMOTO, Nobukazu IKEDA