Patents by Inventor Joseph J. Schegan

Joseph J. Schegan 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 direct current motor
    Patent number: 4311933
    Abstract: A brushless D.C. motor has electrical power switched between the phase windings by means of a circuit which includes a plurality of hall effect switches. The hall effect switches are operated by a plurality of arcuate commutating magnets which are radially polarized and are disposed axially adjacent to field magnets which are also radially polarized. Ordinarily, the direction of radial polarization of the commutating magnets and the field magnets will be opposite.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: January 19, 1982
    Assignee: North American Philips Corporation
    Inventors: William D. Riggs, Joseph J. Schegan