Patents by Inventor Trevor W. Biddulph

Trevor W. Biddulph 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).

  • Engine exhaust system
    Patent number: 4805403
    Abstract: An internal combustion engine has intake and exhaust ducts, including an exhaust duct portion formed as an integral part of the engine along with the engine coolant jacket and passages, the exhaust duct portion being located in good thermal contact with the engine coolant flow passages, and flow diverting valves in the exhaust duct portion to direct exhaust gases to flow through the exhaust duct portion when the engine is cold in order to accelerate warm-up, the valves causing the duct to be bypassed under normal operating conditions.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: February 21, 1989
    Assignee: Ford Motor Company
    Inventors: Timothy J. Bowman, Robert A. Marshall, Trevor W. Biddulph