Patents by Inventor John Bray

John Bray 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).

  • Pneumatic braking system for tractor-trailer combinations
    Patent number: 4076325
    Abstract: A pneumatic braking system for tractor-trailer combinations in which the actuation and release of the trailer brakes occur more nearly in coincidence with the actuation and release of the tractor brakes; the system includes a fast acting amplifying valve operable in response to a control pressure indicative of the magnitude of braking desired to provide an amplified control pressure and a separate air supply located proximate to the amplifying valve for providing the air supply for the amplified control pressure.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: February 28, 1978
    Assignee: Proven Environmental Products, Inc.
    Inventor: Robert John Bray