Patents by Inventor Sachkio Yoneyama

Sachkio Yoneyama 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).

  • Balancer device for in-line engine
    Patent number: 5253547
    Abstract: A balancer device installed to an in-line engine comprises a balance shaft which includes first and second journals at which the balance shaft is supported through first and second bearings. The first bearing is disposed near the front side of the engine and set in a retainer for rotatably fixing the balance shaft. The second bearing is disposed near a generally center portion in the axial direction of the crankshaft and secured to a cylinder block. A pair of unbalance portions are disposed near the second journal. The diameter of the first journal is formed smaller than that of the second journal to suppress the friction loss of the first journal.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: October 19, 1993
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Sachkio Yoneyama, Hisao Ohkawa, Shisei Kai, Takeshi Houkita