Patents by Inventor Fumio Akikawa

Fumio Akikawa 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).

  • Valve opening system of internal combustion engine
    Patent number: 5809952
    Abstract: A valve mechanism of an internal combustion engine is provided which includes a camshaft that produces drive force for opening and closing a plurality of shut-off valves provided on a combustion chamber. This valve mechanism has a rocker shaft supported at its opposite ends by a pair of rocker shaft supports onto a cylinder head, and first and second rocker arms that are supported by the rocker shaft between the rocker shaft supports such that these rocker arms are movable with respect to each other. The first rocker arm has at one end portion thereof a point of force that receives the drive force from the camshaft, and the second rocker arm has a point of application for driving part of the shut-off valves, at one end portion that is opposite to the point of force of the first rocker arm with respect to an axis of the rocker shaft.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: September 22, 1998
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Takashi Ono, Fumio Akikawa, Akira Matsumoto, Masahiko Takeuchi
  • Dynamic valve mechanism for engine
    Patent number: 5803038
    Abstract: A dynamic valve mechanism for an engine which can make the overall height of the engine relatively small so as to provide easy loading of the engine on a vehicle.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: September 8, 1998
    Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Jidosha Engineering Kabushiki Kaisha
    Inventors: Tadato Ihara, Fumio Akikawa, Toshihiro Kokubun, Mitsunori Murakami