Patents by Inventor Akira Shigahara

Akira Shigahara 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).

  • Patent number: 7128194
    Abstract: A centrifugal clutch for a vehicle for reducing the trouble occuring when the clutch capacity becomes insufficient due a modification to the vehicle, such that of increasing the engine output or the exhaust gas quantity. The clutch weight of the centrifugal clutch is assembled by stacking a set of five sheets of clutch weight component members, three of which have similar structures. Each clutch weight component member is composed of two formed portions, the portions formed by baking two kinds of sintered metallic powders differing in specific gravity. Portions away from a fulcrum of inclination are formed by baking the sintered metallic powder having a larger specific gravity. Portions near the fulcrum of inclination are formed by baking the sintered metallic powder having a smaller specific gravity. As a result, the center of gravity of the clutch weight is positioned near a tip portion of the weight.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: October 31, 2006
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Takashi Ishizaka, Masaaki Narita, Akira Shigahara