Patents by Inventor Albert L. W. Hartman

Albert L. W. Hartman 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).

  • Methods and apparatus for improved DC motors and magnetic clutches
    Patent number: 5861696
    Abstract: A method for manufacturing a direct current motor having a stator and a rotor. The stator has a first number of slots, and the rotor includes a permanent magnet having a second number of alternately magnetized poles. The method includes calculating a magnetization pattern based on a magnetizing construct associated with said direct current motor, which magnetizing construct includes a hypothetical magnetizing stator having the same number of magnetizing teeth as the second number of alternately magnetized poles. The method further includes having the permanent magnet magnetized with substantially the calculated magnetization pattern, thereby forming the direct current motor.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: January 19, 1999
    Assignee: Quantum Corporation
    Inventors: Albert L. W. Hartman, Wendy L. Lorimer