Patents by Inventor Kozo Koike

Kozo Koike 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).

  • Rotary piston type internal combustion engines
    Patent number: 4056339
    Abstract: Rotary piston engine having a rotor housing applied with a pin-point type porous chromium plating having porosity of 10 to 60 percent and a hardness of 930 to 1200 in Vicker's scale. The engine also has a rotor having apex seals each constituted by cast iron based material. Each apex seal has a sliding surface including 50 to 70 volume percent of carbides and a hardness of 700 to 900 in Vicker's scale.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: November 1, 1977
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Kunio Doi, Kozo Koike, Toshiro Sasaki