Patents by Inventor Kiyokazu Inmaru

Kiyokazu Inmaru 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).

  • Hard-particle dispersion type sintered-alloy for valve seat use
    Patent number: 4332616
    Abstract: A valve-seat material ideal for valve seats for vehicle-engine exhaust valves with no cobalt contained therein, superior in general use, has superior wear-resistance in high-temperature oxidizing atmosphere, and can be used independently of types of fuel to be used in the non-lead gasoline, lead-contained gasoline, L.P.G. or the like. The recession amount of the valve is extremely decreased and the wear resistance is remarkably improved.
    Type: Grant
    Filed: June 4, 1980
    Date of Patent: June 1, 1982
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Tsuyoshi Morishita, Koji Yagii, Kiyokazu Inmaru, Kenji Miyake
  • Method of fabrication of distortion-resistant material
    Patent number: 4079157
    Abstract: Method of fabrication of material suited for use in a thermal reactor according to which austenitic stainless steel is dipped in a bath of molten aluminium in addition of silicon and then receives heat treatment in specific temperature ranges, whereby preferential diffusion of silicon in the steel material is effected. The diffused silicon prevents diffusion of aluminium and ensures that thickness of plating layers remains at a value such that distortion of a plated element does not occur even after prolonged service.
    Type: Grant
    Filed: November 19, 1976
    Date of Patent: March 14, 1978
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Toshio Yagi, Junichi Yamamoto, Kiyokazu Inmaru