Patents by Inventor Yuu NAKAJIMA

Yuu NAKAJIMA 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).

  • Valve opening and closing system and valve control device
    Patent number: 10641411
    Abstract: A valve opening and closing system includes: a site/center switching manual valve; a manual valve for opening and closing operation; an opening/closing switching electric driving valve that opens and closes a manual valve and that nullifies the manual valve for opening and closing operation; a center wireless transmitter that accepts and transmits an operation instruction including an opening and closing operation instruction and a forced closing operation instruction; and a site wireless transmitter, and a contact signal converter, the site side valve control device transmits both of the opening and closing operation instruction and the forced closing operation instruction to the contact signal converter when the site/center switching manual valve is switched to the center control side, and interrupts the opening and closing operation instruction and transmits the forced closing operation instruction to the contact signal converter when the site/center switching manual valve is switched to on site.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: May 5, 2020
    Assignee: Yokogawa Electric Corporation
    Inventors: Hitoshi Saito, Noriharu Funaki, Yuu Nakajima
  • VALVE OPENING AND CLOSING SYSTEM AND VALVE CONTROL DEVICE
    Publication number: 20190136998
    Abstract: A valve opening and closing system includes: a site/center switching manual valve; a manual valve for opening and closing operation; an opening/closing switching electric driving valve that opens and closes a manual valve and that nullifies the manual valve for opening and closing operation; a center wireless transmitter that accepts and transmits an operation instruction including an opening and closing operation instruction and a forced closing operation instruction; and a site wireless transmitter, and a contact signal converter, the site side valve control device transmits both of the opening and closing operation instruction and the forced closing operation instruction to the contact signal converter when the site/center switching manual valve is switched to the center control side, and interrupts the opening and closing operation instruction and transmits the forced closing operation instruction to the contact signal converter when the site/center switching manual valve is switched to on site.
    Type: Application
    Filed: January 26, 2017
    Publication date: May 9, 2019
    Applicant: YOKOGAWA ELECTRIC CORPORATION
    Inventors: Hitoshi SAITO, Noriharu FUNAKI, Yuu NAKAJIMA