Patents by Inventor Yasuhito Tomochika

Yasuhito Tomochika 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).

  • Tip for a cutting tool
    Patent number: 5056963
    Abstract: A tip for a cutting tool which can apply a heavy residual stress in compression to a material to be cut. This tip has four cutting portions. Each of the cutting portions has first and second rake surfaces having first and second angles of negative values, respectively, relative to an upper surface of the tip. Absolute value of the first negative angle is smaller than that of the second negative angle. The second rake surface is located further from a center of the tip than is the first rake surface, and is also located behind the first rake surface relative to a cutting direction of the tip.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: October 15, 1991
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Ryoki Kameno, Yasuhito Tomochika, Takao Tamagawa, Yoshiki Fujimoto