Patents by Inventor Gary R. Grissom

Gary R. Grissom 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).

  • Electronic speed control interlock
    Patent number: 4888813
    Abstract: A motor controller for use on a treadmill to prohibit the treadmill from operating at a high speed immediately upon energization. The controller uses solid state circuitry in a motor speed circuit with a speed setting potentiometer set by the user. The system is adapted so as upon energization a minimum speed is initially achieved. The results are obtained with the interaction of a buffer circuit, solid state circuitry, and an SCR motor speed control circuit.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: December 19, 1989
    Assignee: Dart Controls, Inc.
    Inventors: Paul E. Penn, Gary R. Grissom