Patents by Inventor Makoto Oiyama

Makoto Oiyama 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).

  • Method of producing a forging
    Patent number: 5729883
    Abstract: A method of producing a disc of an automotive road wheel by using an aluminum alloy as a material. The producing method comprising the following steps: (1) casting a disc material including an annular spoke section which has a ridge and is formed with a depression, the depression defined by a bottom wall; and (2) forging the disc material to obtain the forged disc by applying a processing degree of not less than 15% to the bottom wall of the spoke section and by applying a stress of not less than 50 MPa to the ridge of the spoke section.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: March 24, 1998
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hideo Yoshioka, Makoto Oiyama, Yujiro Ohara, Kiyoshi Takagi