Patents by Inventor Uichiyama Shigenobu

Uichiyama Shigenobu 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 drive mechanism of four-stroke cycle engine
    Patent number: 6357405
    Abstract: An improved variable valve timing mechanism that is operative to provide an arrangement for varying both the valve lift and lift curve in response to dynamic running conditions. A variable valve timing mechanism is also incorporated in the cam drive so as to further widen the range of adjustment of valve timing.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: March 19, 2002
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Kouichi Tsuji, Toshihiko Yoneta, Uichiyama Shigenobu