Patents by Inventor Demetris C. Petritis

Demetris C. Petritis 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).

  • Method and means for driving a brushless D.C. motor
    Patent number: 4763052
    Abstract: A brushless D.C. motor drive circuit provides full available D.C. bus voltage to the motor during periods of motor speed acceleration and deceleration and modulated D.C. voltage to the motor during periods when no demands are made on the motor to accelerate or decelerate, thus avoiding time-lag problems inherent in the type of conventional brushless D.C. motor drive circuits which employ pulse-width modulators to continuously provide modulated D.C. voltage to the motor.
    Type: Grant
    Filed: June 25, 1987
    Date of Patent: August 9, 1988
    Assignee: The Superior Electric Company
    Inventors: Robert S. Lundin, Demetris C. Petritis