Patents by Inventor Takachiyo Okamoto

Takachiyo Okamoto 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 of making a stator bar usable in a linear stepper motor
    Patent number: 4545117
    Abstract: A linear stepper motor comprising a stator bar having stator teeth and a slider having slider teeth. The slider is positioned under the stator bar. The surface of the stator bar opposed to the slider has a pair of flat portions with a predetermined width between the edges and the teeth. The flat portions serve as rail portions for the rollers mounted on the slider. On the surface of the stator bar extending between the pair of flat portions are formed a plurality of parallel grooves to provide a plurality of stator teeth. The surface of thes stator bar is hardened by plating with a metallic material.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: October 8, 1985
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takachiyo Okamoto
  • Linear stepper motor
    Patent number: 4408138
    Abstract: A linear stepper motor comprising a stator bar having stator teeth and a slider having slider teeth. The slider is positioned under the stator bar. The surface of the stator bar opposed to the slider has a pair of flat portions with a predetermined width between the edges and the teeth. The flat portions serve as rail portions for the rollers mounted on the slider. On the surface of the stator bar extending between the pair of flat portions are formed a plurality of parallel grooves to provide a plurality of stator teeth. The surface of the stator bar is hardened by plating with a metallic material.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: October 4, 1983
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takachiyo Okamoto