Patents by Inventor Kofuku Ito

Kofuku Ito 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).

  • Feedback mechanism and valve positioner
    Patent number: 6776389
    Abstract: A feedback mechanism includes a feedback pin, feedback shaft, feedback sensor, and connecting member. The feedback pin displaces interlocked with a motion of an actuating shaft of a valve that opens and closes. The feedback shaft pivots interlocked with displacement of the feedback pin. The feedback sensor outputs a feedback signal, to be used for opening/closing the valve, in accordance with a pivoting amount of the feedback shaft. The connecting member connects the feedback pin and the feedback shaft, and has a cylindrical first bearing through which the feedback pin is inserted, and a cylindrical second bearing through which feedback shaft is inserted.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: August 17, 2004
    Assignee: Yamatake Corporation
    Inventor: Kofuku Ito
  • Feedback mechanism and valve positioner
    Publication number: 20030155542
    Abstract: A feedback mechanism includes a feedback pin, feedback shaft, feedback sensor, and connecting member. The feedback pin displaces interlocked with a motion of an actuating shaft of a valve that opens and closes. The feedback shaft pivots interlocked with displacement of the feedback pin. The feedback sensor outputs a feedback signal, to be used for opening/closing the valve, in accordance with a pivoting amount of the feedback shaft. The connecting member connects the feedback pin and the feedback shaft, and has a cylindrical first bearing through which the feedback pin is inserted, and a cylindrical second bearing through which feedback shaft is inserted.
    Type: Application
    Filed: February 12, 2003
    Publication date: August 21, 2003
    Inventor: Kofuku Ito
  • Valve positioner
    Patent number: D409725
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: May 11, 1999
    Assignee: Yamatake-Honeywell Co., Ltd.
    Inventors: Kofuku Ito, Yoshiro Honda