Patents by Inventor Mistuo Yoshimura

Mistuo Yoshimura 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).

  • Backup ring for hydraulic apparatus seals
    Patent number: 4468041
    Abstract: The backup ring offered by the present device is formed to be a ring-shaped body and is cut at one place thereof in the circumferential direction by a plane which is made to parallel the radius passing the central axial line of the ring-shaped body, which is inclined to the end surface of the ring-shaped body and whose point of intersection with the central axial line is located outside the ring-shaped body.
    Type: Grant
    Filed: August 20, 1982
    Date of Patent: August 28, 1984
    Assignee: Nippon Oil Seal Industry Co., Ltd.
    Inventors: Mistuo Yoshimura, Akihisa Takaoka