Patents by Inventor Heihachiro Ohigawa

Heihachiro Ohigawa 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).

  • Copper-base bearing material containing corrosion-resistant lead alloy
    Patent number: 3969084
    Abstract: A Pb-base alloy containing 1 - 3% Sn and 0.5 - 3.5% Bi, allowing less than 2% Sb to be further contained, resists attack from acids formed in deteriorated lubricating oils. Either an alloy of Cu and the Pb-base alloy or a porous Cu mass impregnated with the Pb-base alloy is a highly corrosion-resistant bearing material, and the Pb-base alloy serves also as a direct overlay on a Cu-base bearing material due to negligible heat diffusion of Sn from the alloy.
    Type: Grant
    Filed: May 21, 1974
    Date of Patent: July 13, 1976
    Assignees: Nissan Motor Co., Ltd., Nippon Dia Clevite Company, Limited
    Inventors: Sakae Watanabe, Heihachiro Ohigawa