Patents by Inventor Seiki Shiotsuki

Seiki Shiotsuki 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: 5291084
    Abstract: A stepping motor having two stator units axially arranged. Each of the stator units includes an inner yoke and an outer yoke having a plurality of pole teeth circumferentially formed at a predetermined pitch around a rotor having magnetic poles. The outer yoke of one of the stator units is asymmetrically arranged so that the pole teeth thereof are shifted from center between the pole teeth of the inner yoke in a specific direction. As a result, a cogging torque is reduced, constant speed rotation is attained and variations in the output torque are eliminated. Variation in the generated torque are also reduced by controlling the drive pulse width, the drive voltage or the drive current during the driving operation in accordance with the number of excitation phases.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: March 1, 1994
    Assignees: Canon Seiki Kabushiki Kaisha, Canon Kabushiki Kaisha
    Inventors: Seiki Shiotsuki, Shingo Sanbe, Shinichi Kanaya, Masamichi Furukawa, Shigeru Taneichi
  • Patent number: 5155401
    Abstract: A recorder motor with an encoder, for forming an image on a record medium in accordance with image information, has the encoder on the outside of the motor case and a plastic dust-proof cover for the encoder mounted on the case. Thus, contamination by dust or ink mist is prevented, and stable and high precision motor rotation is maintained.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: October 13, 1992
    Assignees: Canon Kabushiki Kaisha, Canon Seiki Kabushiki Kaisha
    Inventors: Shinichi Kanaya, Koji Tanaka, Shingo Sanbe, Shinichi Osada, Seiki Shiotsuki