Patents by Inventor Tomohiro SAWAHATA

Tomohiro SAWAHATA 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: 10808865
    Abstract: A method of controlling a vacuum valve includes instructing an actuator to reduce an operating speed so that an amplitude falls within the first threshold value when the amplitude obtained from a vibration sensor exceeds a first threshold value and a second threshold value. The method also includes instructing the actuator to return to the operating speed when the amplitude obtained from the vibration sensor is below the second threshold value.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: October 20, 2020
    Assignee: V-Tex Corporation
    Inventors: Hideaki Nagai, Tomohiro Sawahata
  • Patent number: 10746307
    Abstract: Particle scattering is suppressed only by controlling the gate valve in opening the gate valve with the internal pressure of the chamber being matched to the atmospheric pressure.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: August 18, 2020
    Assignee: V-Tex Corporation
    Inventors: Hideaki Nagai, Tomohiro Sawahata, Katsuyuki Saitoh, Shuichi Araki, Yoshinori Tobita, Mitsuhiro Ikeda
  • Publication number: 20190346047
    Abstract: Particle scattering is suppressed only by controlling the gate valve in opening the gate valve with the internal pressure of the chamber being matched to the atmospheric pressure.
    Type: Application
    Filed: January 10, 2019
    Publication date: November 14, 2019
    Inventors: Hideaki NAGAI, Tomohiro SAWAHATA, Katsuyuki SAITOH, Shuichi ARAKI, Yoshinori TOBITA, Mitsuhiro IKEDA
  • Publication number: 20190331257
    Abstract: The object of the invention is to control the vibration of a vacuum valve within the allowable range by regulating the operation speed of the vacuum valve. A controlling method for driving a vacuum valve of a valve system is as described below. The vacuum valve to be controlled is comprised of a valve body that opens and closes the opening of a vacuum valve, an actuator that moves the valve body between closed position and open position of the valve body, a vibration sensor for detecting vibration of the valve body, and a control unit that instructs the actuator about speed of the valve body.
    Type: Application
    Filed: February 21, 2019
    Publication date: October 31, 2019
    Inventors: Hideaki NAGAI, Tomohiro SAWAHATA
  • Publication number: 20190316688
    Abstract: An object of the invention is to provide a method of controlling a gate valve that operates the gate valve in a short time while suppressing vibration of the valve body. A method of controlling a gate valve provided on an opening of a chamber, wherein the gate valve includes a valve body that opens and closes so as to close the opening of a chamber, a valve seat provided on the edge of the opening to which the valve body is pressed, and a sealing material for sealing between the valve body and the valve seat. The invented method is characterized in that, in moving the valve body to the open position from the closed position where the valve body is pressed against the valve seat with the sealing material compressed, the valve body is made to stop temporarily for a predetermined time at the position immediately before the compressed sealing material is pulled apart or immediately after pulled apart in the opening movement of the valve body.
    Type: Application
    Filed: February 26, 2019
    Publication date: October 17, 2019
    Inventors: Tomohiro SAWAHATA, Katsuyuki SAITOH, Hideaki NAGAI, Mitsuhiro IKEDA