Patents by Inventor Yoichi Shimizu

Yoichi Shimizu 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).

  • Sintered powdered ferrous alloy article and process for producing the alloy article
    Patent number: 4021205
    Abstract: A sintered powdered ferrous alloy article having high heat and abrasion resistances and a high workability is produced by admixing, (1) 5 to 30% by weight of a finely divided component alloy which consists of the following composition,______________________________________ 1 to 4% by weight carbon 10 to 30% by weight chromium 2 to 15% by weight nickel 10 to 30% by weight molybdenum 20 to 40% by weight cobalt 1 to 5% by weight niobium the balance iron, ______________________________________(2) 0.8 to 2% by weight of finely divided carbon and (3) the balance of a finely divided ferrous base metal, compression molding the admixture under a pressure of 4 to 6 metric tons/cm.sup.2 and sintering the molded admixture in a reducing atmosphere at a temperature of 1050.degree. to 1150.degree.
    Type: Grant
    Filed: June 8, 1976
    Date of Patent: May 3, 1977
    Assignees: Teikoku Piston Ring Co. Ltd., Honda Motor Co., Ltd.
    Inventors: Takayuki Matsuda, Yoichi Shimizu, Hiroki Shimizu, Kazushi Imazaki, Setsuo Nii