Patents by Inventor Isamu Serizawa

Isamu Serizawa 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).

  • Miniature motor having a built-up commutator
    Patent number: 5272404
    Abstract: A commutator has such a construction that a flange having an outside diameter larger than the outside diameter of a cylindrical body is provided integrally with the cylindrical body in the vicinity of one end of the cylindrical body; guide grooves formed in a circular arc shape in cross section are provided on the flange at the boundary of the flange to the cylindrical body; engaging pieces passing through the guide grooves are provided on one end of a commutator segment; and engaging pieces are caused to deform plastically to fixedly fit the engaging pieces to the flange.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: December 21, 1993
    Assignee: Mabuchi Motor, Co., Ltd.
    Inventors: Toshiya Yuhi, Michio Hoshino, Toru Yano, Hideo Tamura, Isamu Serizawa, Etsuo Mayumi, Takashi Ushiku, Takeshi Okumura, Kouichi Koide