Patents by Inventor Nobuo Norimatsu

Nobuo Norimatsu 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).

  • Suction device for a supercharged engine
    Patent number: 6079378
    Abstract: In constructing a suction device for a crank chamber supercharged engine 1 wherein intake air pressurized by a supercharge mechanism is supplied to a combustion chamber, it is arranged that the supercharge mechanism and the combustion chamber are communicatively interconnected by suction passage 38, 46, with an intake valve 7 disposed open/close operably at a downstream end of the suction passage 46, the intake valve 7 being adapted to close between 70 and 100 degrees after a bottom dead center.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: June 27, 2000
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Jun Taue, Nobuo Norimatsu
  • Exhaust system for multicylinder motorbike engine
    Patent number: 4359865
    Abstract: An exhaust system for a multicylinder motorbike internal combustion engine. Each cylinder has a respective exhaust pipe. The pipes merge and discharge into a chamber, from which chamber a plurality of silencers, fewer in number than the cylinders, discharges exhaust gases to the atmosphere.
    Type: Grant
    Filed: August 28, 1980
    Date of Patent: November 23, 1982
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Yasuo Nakao, Nobuo Norimatsu