Patents by Inventor Koreyuki Yamamoto

Koreyuki Yamamoto 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).

  • Oil-impregnated sintered product and method of producing same
    Patent number: 4014802
    Abstract: An oil-impregnated sintered product having a resin-impregnated layer on the surface thereof for preventing oil contained therein from scattering therefrom when it moves at high speed. A method of producing the same comprising the steps of forming a seal layer on a sintered product, impregnating the sintered product with thermosetting resin, removing the seal layer, and impregnating the sintered product with oil.
    Type: Grant
    Filed: July 18, 1973
    Date of Patent: March 29, 1977
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Seino, Norio Yamada, Shigeo Kimura, Hideaki Kosugi, Koreyuki Yamamoto
  • Oil-impregnated sintered clutch hub
    Patent number: 4006809
    Abstract: An oil-impregnated sintered product having a resin-impregnated layer on the surface thereof for preventing oil contained therein from scattering therefrom when it moves at high speed. A method of producing the same comprising the steps of forming a seal layer on a sintered product, impregnating the sintered product with thermosetting resin, removing the seal layer, and impregnating the sintered product with oil.
    Type: Grant
    Filed: January 8, 1976
    Date of Patent: February 8, 1977
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Seino, Norio Yamada, Shigeo Kimura, Hideaki Kosugi, Koreyuki Yamamoto