Patents by Inventor Tooru Watanabe

Tooru Watanabe 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 with cogging reduction
    Patent number: 4769567
    Abstract: A brushless direct current electric motor includes a stator having plural stator teeth at prescribed tooth pitches, exciter coils on the stator, a rotor mounted for rotation in an opening of the stator and plural magnetic poles formed on the peripheral surface of the rotor. According to the invention, the magnetic pole pitch between any given adjacent ones of the magnetic poles is different from the magnetic pole pitches between adjacent ones of said magnetic poles neighboring both sides of the firstly-mentioned adjacent ones of the magnetic poles.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: September 6, 1988
    Assignee: Tamagawa Seiki Kabushiki Kaisha
    Inventors: Tuneya Kurauchi, Tooru Watanabe
  • Electrical connector receptacle and process for manufacturing same
    Patent number: 4699595
    Abstract: An electrical connector receptacle, which comprises an insulating housing; a plurality of parallel contacts arranged in said insulating housing; a plurality of parallel recesses provided in the inside of the housing top wall adjacent to the plug-receiving end for receiving the bent portions of contacts between the intermediate portions and the spring portions; a block-receiving opening provided in the housing rear portion; and a contact support block adapted to fit into the block-receiving opening.
    Type: Grant
    Filed: March 13, 1986
    Date of Patent: October 13, 1987
    Assignee: Hirose Electric Co.
    Inventors: Akira Nakazawa, Tooru Watanabe