Patents by Inventor Kouji Yoneda

Kouji Yoneda 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).

  • Brushless DC motor
    Patent number: 6710504
    Abstract: A brushless DC motor wherein a rotor has a motor shaft, a rotor yoke mounted on the motor shaft, and a ring-shaped magnet magnetized so as to have a plurality of magnet poles in the circumferential direction thereof, and held by the rotor yoke. A stator has first and second stator yokes each having main magnetic poles extending in the radial direction from the center thereof, magnetic pole pieces extending in the vertical direction from tip ends of the main magnetic poles along an inner peripheral surface of the ring-shaped magnet, a center yoke surrounding the motor shaft for connecting magnetically said first and second stator yokes, a winding assembly having an annular winding, and a printed wiring board, on which the annular winding, a electromagnetic conversion element and a driving circuit are mounted.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: March 23, 2004
    Assignee: Japan Servo Co., Ltd.
    Inventors: Shoji Ohiwa, Kazuo Ohnishi, Yoichi Nagata, Junichi Ikeda, Tomokazu Uchiyama, Kouji Yoneda, Hideo Saito, Masahiro Mimura
  • Brushless DC motor
    Publication number: 20030057799
    Abstract: A brushless DC motor wherein a rotor has a motor shaft, a rotor yoke mounted on the motor shaft, and a ring-shaped magnet magnetized so as to have a plurality of magnet poles in the circumferential direction thereof, and held by the rotor yoke. A stator has first and second stator yokes each having main magnetic poles extending in the radial direction from the center thereof, magnetic pole pieces extending in the vertical direction from tip ends of the main magnetic poles along an inner peripheral surface of the ring-shaped magnet, a center yoke surrounding the motor shaft for connecting magnetically said first and second stator yokes, a winding assembly having an annular winding, and a printed wiring board, on which the annular winding, a electromagnetic conversion element and a driving circuit are mounted.
    Type: Application
    Filed: September 17, 2002
    Publication date: March 27, 2003
    Applicant: Japan Servo Co., Ltd.
    Inventors: Shoji Ohiwa, Kazuo Ohnishi, Yoichi Nagata, Junichi Ikeda, Tomokazu Uchiyama, Kouji Yoneda, Hideo Saito, Masahiro Mimura