Patents by Inventor William A. De Salme

William A. De Salme 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 and controller
    Patent number: 5059875
    Abstract: An apparatus is provided that comprises a DC motor and a controller adapted to control the motor. The motor has a permanent magnet rotor and an electromagnetic stator. The rotor is divided into three permanent magnet sections which are separated by aluminum spacers. The stator has three groups of coils which are arranged around the three permanent magnet sections. The controller sequentially activates each of the three groups of coils at a predetermined rate thereby controlling the speed of the motor.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: October 22, 1991
    Inventor: William A. De Salme