Patents by Inventor Koken Oyamada

Koken Oyamada 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).

  • Starting apparatus of diaphragm-type carburetor
    Patent number: 7111616
    Abstract: A starting apparatus of a diaphragm-type carburetor, a starting pump disposed at a convenient and accessible location which is separate from a carburetor main body, and air is prevented from being mixed into fuel, in such a structure constructed as a suction-type starting pump. A suction passage extends from a fuel metering chamber and extends beyond an outer portion of the carburetor main body. A starting pump conveniently disposed is separate from the carburetor, and an inlet check valve of the starting pump is disposed in the carburetor main body so as to reduce a volumetric capacity of a section extending to the inlet check valve from the fuel metering chamber, thereby preventing the air from remaining within the suction passage.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: September 26, 2006
    Assignee: Zama Japan Co., Ltd.
    Inventors: Koken Oyamada, Mamoru Toda
  • Starting apparatus of diaphragm-type carburetor
    Publication number: 20050109303
    Abstract: A starting apparatus of a diaphragm-type carburetor, a starting pump disposed at a convenient and accessible location which is separate from a carburetor main body, and air is prevented from being mixed into fuel, in such a structure constructed as a suction-type starting pump. A suction passage extends from a fuel metering chamber and extends beyond an outer portion of the carburetor main body. A starting pump conveniently disposed is separate from the carburetor, and an inlet check valve of the starting pump is disposed in the carburetor main body so as to reduce a volumetric capacity of a section extending to the inlet check valve from the fuel metering chamber, thereby preventing the air from remaining within the suction passage.
    Type: Application
    Filed: November 22, 2004
    Publication date: May 26, 2005
    Applicant: Zama Japan Co., Ltd.
    Inventors: Koken Oyamada, Mamoru Toda