Patents by Inventor Frank Warburton Thornhill

Frank Warburton Thornhill 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: 4095822
    Abstract: Suspension apparatus, particularly for use with motor vehicles, utilizing a pair of pistons. The upper ends of the piston rods are connected one to either side of the underbody of the vehicle. Each piston is displaceable within its respective fluid containing cylinder. The upper and lower chambers of one cylinder are respectively connected by fluid lines to the lower and upper chambers of the other cylinder. Each fluid line is connected by an auxiliary line through a separate metering valve to separate hydraulic accumulators.
    Type: Grant
    Filed: September 24, 1976
    Date of Patent: June 20, 1978
    Inventor: Frank Warburton Thornhill