Patents by Inventor Koichi Takahasi

Koichi Takahasi 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).

  • Vane pump housing
    Patent number: 3995977
    Abstract: An annular sleeve is radially deformed within a cylindrical bore to provide a housing for a pump having vanes slidable through slots in an eccentric rotor, the radially opposed edges of the vanes slidably contacting the inner surface of the sleeve.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: December 7, 1976
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Koichi Takahasi, Nobuteru Hitomi, Tokiyoshi Yanai, Manabu Tsunematsu