Patents by Inventor Jerald Frownfelter

Jerald Frownfelter 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).

  • Patent number: 7573173
    Abstract: Apparatuses, circuits, and methods for driving an axial field electric motor, and systems using the same. The electric motor generally comprises a fixed magnet assembly having a plurality of fixed magnets arranged circularly around a shaft, a coil assembly including a plurality of coil layers, and a controller configured to provide each of a plurality of drive signals to one of the coil layers. Each of the drive signals generally has a different phase (e.g., each drive signal may pulse and/or oscillate with different phase offsets). The fixed magnets generally have north-south axes parallel to the shaft (e.g., the magnetic field is axial to the shaft). Each of the coil layers generally comprises a plurality of electromagnetic coils arranged circularly around the shaft in plane that is substantially perpendicular to the shaft. Each of the electromagnetic coils comprises a conductive spiral wound in the plane of the coil layer.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: August 11, 2009
    Assignee: Aximet Technology, Inc.
    Inventor: Jerald Frownfelter