Patents by Inventor Takeo Fukui

Takeo Fukui 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).

  • Piston ring for internal combustion engine
    Patent number: 4198065
    Abstract: A four cylinder four cycle spark ignition engine has oblong pistons each mounted to reciprocate within an oblong cylinder. Each piston is elongated in a direction parallel to the axis of the crankshaft and is provided with piston rings which have sliding contact with the surface of the oblong cylinder. Each piston ring is split at one side, and the free shape thereof prior to installation is such as to give superior results after installation when the engine is operated at high speed and high performance.
    Type: Grant
    Filed: March 22, 1979
    Date of Patent: April 15, 1980
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Takeo Fukui
  • Process for the separation of 4,4'-dichlorodiphenylsulfone
    Patent number: 4012451
    Abstract: Pure 4,4'-dichlorodiphenylsulfone is separated from the reaction mixture containing 4,4'-dichlorodiphenylsulfone and the isomers thereof by adding the reaction mixture to the mixture of trichloroethylene or tetrachloroethylene, and water to extract 4,4'-dichlorodiphenylsulfone with said organic solvent and cooling the organic solution separated from the water layer to precipitate pure 4,4'-dichlorodiphenylsulfone.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: March 15, 1977
    Assignee: Nippon Soda Company Limited
    Inventors: Kichiji Enoki, Takeo Fukui, Takeo Yamamoto, Toshirou Okada, Yoshiaki Miyazaki