Patents by Inventor Souichi Shimomura

Souichi Shimomura 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).

  • Rocker arm having wear resistant scuffing resistant portion
    Patent number: 4870931
    Abstract: A rocker arm for use in an internal combustion engine. The rocker arm has a portion abutting an opponent mechanical component, and at least the portion is formed of a cast iron consisting of from 2.5 to 3.7 wt % of carbon; from 1.0 to 2.0 wt % of silicon; from 0.5 to 1.0 wt % of manganese; from 10 to 20 wt % of chromium; from 0.3 to 0.7 wt % of nickel; not more than 0.3 wt % of phosphorus; not more than 0.1 wt % of sulfur; and balance iron and impurities; Carbide mainly containing chromium is uniformly precipitated from at least one of pearlitic and martensitic matrix in the cast iron.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: October 3, 1989
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Yoshikatsu Nakamura, Osamu Kawamura, Souichi Shimomura