Patents by Inventor Tadao Chujyo

Tadao Chujyo 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).

  • Device for replacing packings of flange joints
    Patent number: 3997957
    Abstract: A device for replacing the packings of flange joints with new ones which comprises: a supporting body consisting of a sleeve and a pair of supporting bars attached to said sleeve; a movable member movably attached to said sleeve; a wedge member fixed to the lower end of said movable member; and a pair of supporting arms to connect said supporting body with the flanges.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: December 21, 1976
    Assignee: Hokko Co., Ltd.
    Inventors: Hisashi Tone, Tadao Chujyo