Patents by Inventor Koichi Iwakura

Koichi Iwakura 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).

  • High-frequency motor incorporating tool drawing-up device therein
    Patent number: 4668137
    Abstract: This invention is characterized by that the high-frequency motor is adapted to provide the tapered surface engagements in both engaging parts between a draw bar set in a rotary shaft of the motor and a slit hook engaged with the draw bar, and between this hook and a holder for the hook, and to reverse mutually the inclined directions of these tapered surfaces so as to obtain a large clamp force.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: May 26, 1987
    Assignee: Mitsui Seiki Kogyo Co., Ltd.
    Inventor: Koichi Iwakura