Patents by Inventor Morimasa Tsuzuki

Morimasa Tsuzuki 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).

  • Patent number: 5744891
    Abstract: A DC motor brush assembly includes a brush brought into contact with a commutator piece which is connected to the coil of a DC motor, and a brush holder of plastic material for holding the brush against the motor housing. The brush is formed by bending from a bottom shield sheet. The bottom shield sheet is brought into intimate contact with a mold to form a non-molding chamber containing the brush when the brush holder is to be insert-molded. The brush holder is molded integrally over the bottom shield sheet.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: April 28, 1998
    Assignee: Sayama Precision Industries, Co., Ltd.
    Inventors: Toshihide Okuyama, Kenji Tabata, Masahiro Kaneko, Morimasa Tsuzuki
  • Patent number: 5729070
    Abstract: A commutator assembly includes a plurality of commutator pieces for supplying an electric current from a brush fixed at a motor housing to a coil rotating together with a rotor shaft of a small motor, and a commutator holder of a plastic material fixed to the rotor shaft for supporting the commutator pieces. The commutator pieces are cut out of a commutator piece joint body which has a plurality of commutator pieces radially extending from a single temporary connection and is molded into the commutator holder during molding process.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: March 17, 1998
    Assignee: Sayama Precision Industries Co., Ltd.
    Inventors: Toshihide Okuyama, Kenji Tabata, Masahiro Kaneko, Morimasa Tsuzuki