Patents by Inventor Corlis E. Preston

Corlis E. Preston 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: 4760649
    Abstract: A new solid state electronic position indicator used to determine the horizontal and longitudinal level attitude of a recreation vehicle. This device, mounted on the frame of the vehicle, senses an imbalance condition by relying on a gravity sensitive compound pendulum. The pendulum is rectangular in shape, rotating about a shaft mounted ball bearing. Movement of this pendulum is detected by the electronic sensing circuit. This circuit sends an electrical signal to a visual or audio receiver mounted within a control panel, remote from the sensor. The control panel is normally mounted on dash of tow vehicle. The signal display indicates which side or end of the recreation vehicle requires elevation to attain a level attitude required to safely operate the propane gas operated appliances, e.g. (refrigerator, hot water heater) and provide creature comfort.
    Type: Grant
    Filed: December 11, 1986
    Date of Patent: August 2, 1988
    Inventors: Corlis E. Preston, Victor K. Hsia