Patents by Inventor Toshimitu Kimura

Toshimitu Kimura 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).

  • Steel for high bearing pressure-resistant member, having high machinability, and high bearing pressure-resistant member using same steel
    Patent number: 6869489
    Abstract: A steel for a high bearing pressure-resistant member, having a high machinability. The steel is formed of a machine structural steel comprising carbon in an amount ranging from 0.15 to 0.25% by weight, silicon in an amount of not less than 0.4% by weight, nickel in an amount ranging from 1 to 3% by weight, chromium in an amount ranging from 1.2 to 3.2% by weight, and molybdenum in an amount ranging from 0.25 to 2.0% by weight. The machine structural steel contains carbide precipitated under a heat treatment for spheroidizing. The carbide has an average particle size of not larger than 1 ?m and the maximum particle size of not larger than 3 ?m.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: March 22, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toshimitu Kimura, Tatsuomi Nakayama, Hiroo Ueda, Noriko Uchiyama
  • Steel fo high bearing pressure-resistant member, having high machinability, and high bearing pressure-resistant member using same steel
    Publication number: 20020000267
    Abstract: A steel for a high bearing pressure-resistant member, having a high machinability. The steel is formed of a machine structural steel comprising carbon in an amount ranging from 0.15 to 0.25% by weight, silicon in an amount of not less than 0.4% by weight, nickel in an amount ranging from 1 to 3% by weight, chromium in an amount ranging from 1.2 to 3.2% by weight, and molybdenum in an amount ranging from 0.25 to 2.0% by weight. The machine structural steel contains carbide precipitated under a heat treatment for spheroidizing. The carbide has an average particle size of not larger than 1 &mgr;m and the maximum particle size of not larger than 3 &mgr;m.
    Type: Application
    Filed: May 15, 2001
    Publication date: January 3, 2002
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Toshimitu Kimura, Tatsuomi Nakayama, Hiroo Ueda, Noriko Uchiyama