Patents by Inventor Hidemitsu Sumino

Hidemitsu Sumino 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).

  • Hydraulic power transmission joint
    Patent number: 6422368
    Abstract: A valve block coupled to a rotor is provided with a drain mechanism that includes a drain pin adapted to open and close a drain hole. The drain pin is incorporated in a drain plug by providing a support by a return spring. The drain pin has an orifice for generating a flow resistance. One end turn portion of the return spring is press fitted into the interior of the drain pin having the orifice, while the other end turn portion of the return spring is press fitted into the interior of a limiter plug having a limiter pin, whereby the drain pin is rotationally positioned to alleviate cavitation noises.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: July 23, 2002
    Assignees: Fujiunivance Co., Nissan Motor Co., Ltd.
    Inventors: Hidemitsu Sumino, Tadahiko Kato, Akira Nakabayashi, Toshiharu Takasaki, Hirotaka Kusukawa, Shigeo Murata