Patents by Inventor Charles E. Kapper

Charles E. Kapper 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).

  • Noise dampening means for a permanent magnet synchronous motor
    Patent number: 4056744
    Abstract: Noise caused by axial rotor oscillation is reduced by reducing the rotor's oscillations. Such reduction of oscillation is provided by making one set of stator poles shorter than the other or by providing a magnetic attraction between the rotor and the motor housing.
    Type: Grant
    Filed: August 7, 1975
    Date of Patent: November 1, 1977
    Assignee: P. R. Mallory & Co. Inc.
    Inventors: James S. Blanchard, Charles E. Kapper