Patents by Inventor Yoshihisa Tomihari

Yoshihisa Tomihari 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 metallic alloy, method of manufacturing the sintered metallic alloy, and sintered alloy gear employing the sintered metallic alloy
    Patent number: 6264886
    Abstract: There is provided a sintered metallic alloy having toughness capable of supporting stress at a point by distributing structure portions having different values of rigidity approximately uniformly without separation of layers different in brashiness. A method of manufacturing the sintered metallic alloy and a sintered alloy gear employing the sintered metallic alloy are also provided. Metallic materials are formed into a predetermined configuration. Then, the metallic materials is sintered in a sintering furnace (14) to make a sintered metallic alloy. Next, the sintered metallic alloy is cooled gradually to an ambient atmosphere of room temperature. Finally, the temperature of the cooled metallic alloy is raised and a toughness stabilizing process is performed in a low-temperature furnace (18) so that structures with high toughness are distributed approximately uniformly.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: July 24, 2001
    Assignee: JATCO Corporation
    Inventors: Muneo Mizuta, Yasushi Yabe, Yoshihisa Tomihari