Patents by Inventor Bobby D. Foster

Bobby D. Foster 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).

  • Parking brake warning device for over the road tractor trailers
    Patent number: 4967182
    Abstract: A warning device for generating a warning signal when the driver of an over the road tractor-trailer vacates the cab without setting the parking brake. A pressure sensor is used to sense the pressure on the air ride seat and to close an electric switch element whenever the seat is unoccupied. Another switch element is closed when the parking brake is in its release position. The two switch elements are arranged in series with a warning buzzer in a battery powered electric circuit to energize the buzzer if the seat is vacated without the parking brake having been set.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: October 30, 1990
    Inventor: Bobby D. Foster