Patents by Inventor Iwane Ohyama

Iwane Ohyama 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 for chamfering
    Patent number: 4616966
    Abstract: A method for chamfering an edge of a silicon steel plate moving in the longitudinal direction of the edge by applying an entirely circular edge tip of a ring-shaped cutting edge portion of a circular cutter to the edge of the plate material while rotating the circular cutter. The edge tip of the cutting edge portion of the cutter has a rake angle which is within the range of 0 to -1.0 degrees and a relief angle which has a zero or positive value.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: October 14, 1986
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventor: Iwane Ohyama