Patents by Inventor Hidehiko Numata

Hidehiko Numata 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).

  • Silencer for internal combustion engine
    Patent number: 6260659
    Abstract: Compactness is enhanced while retaining the performance, noise deadening characteristic and engine output. The ratio of the distance, a, from a gas outlet end, p, of an exhaust pipe to an inner wall of a rear partition wall to an inside diameter ∅A of the exhaust pipe is set in a relation of 0.6≦(a/∅A)<1.2, while the ratio of the distance, b, from a gas inlet end, q, of a tail pipe to an inner wall of a front partition wall to an inside diameter ∅B of the tail pipe is set in a relation of 0.4≦(b/∅B)<1.2, to afford a silencer having an optimum combination of engine output characteristic and compactness while retaining a noise deadening effect.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: July 17, 2001
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yasushi Takahashi, Hitoshi Kashiwagi, Hiroaki Jinno, Mutsuo Nakajima, Hidehiko Numata