Patents by Inventor Hidekazu Shirai

Hidekazu Shirai 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).

  • Motor drive apparatus and its inspection method
    Patent number: 7834498
    Abstract: A motor drive apparatus includes a motor unit including an output shaft and a first terminal connecting portion; a control board including a second terminal connecting portion, and configured to control a current supply to the motor unit; a housing; a shaft supporting portion supporting the output shaft; and a plurality of relay terminals electrically connecting the first terminal connecting portion with the second terminal connecting portion. The housing includes a motor-unit receiving portion receiving the motor unit, and a board receiving portion formed integrally with the motor-unit receiving portion. The motor-unit receiving portion is formed with an opening on one side of the motor-unit receiving portion in an axial direction of the motor unit and includes a wall portion on another side of the motor-unit receiving portion in the axial direction. The wall portion is formed with a through-hole. The board receiving portion is formed with an opening in the axial direction to receive the control board.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: November 16, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Kohtaro Shiino, Hidekazu Shirai
  • MOTOR DRIVE APPARATUS AND ITS INSPECTION METHOD
    Publication number: 20090021091
    Abstract: A motor drive apparatus includes a motor unit including an output shaft and a first terminal connecting portion; a control board including a second terminal connecting portion, and configured to control a current supply to the motor unit; a housing; a shaft supporting portion supporting the output shaft; and a plurality of relay terminals electrically connecting the first terminal connecting portion with the second terminal connecting portion. The housing includes a motor-unit receiving portion receiving the motor unit, and a board receiving portion formed integrally with the motor-unit receiving portion. The motor-unit receiving portion is formed with an opening on one side of the motor-unit receiving portion in an axial direction of the motor unit and includes a wall portion on another side of the motor-unit receiving portion in the axial direction. The wall portion is formed with a through-hole. The board receiving portion is formed with an opening in the axial direction to receive the control board.
    Type: Application
    Filed: July 1, 2008
    Publication date: January 22, 2009
    Inventors: Kohtaro SHIINO, Hidekazu SHIRAI