Patents by Inventor Makoto Torisu

Makoto Torisu 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).

  • Nut, bolt, and thread unit of female and male thread members
    Patent number: 6334747
    Abstract: The nut has a tool engaging region or a hexagonal region and a flange region provided on a thread end of the hexagonal region. A sloped step sloping at an angle to the center line of the nut is provided on the thread end. The sloped step (surface) is thus shaped of the annular form on the inner wall of the nut adjacent to the nut opening which faces outwardly of the nut and substantially extends along the loop.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: January 1, 2002
    Assignee: Sugiura Seisakusho Co., Ltd.
    Inventors: Makoto Torisu, Ryuji Suzuki, Keiji Nomura