Patents by Inventor Terence J. Roycroft

Terence J. Roycroft 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: 5531179
    Abstract: An apparatus for retracting axle-driven wheels onboard an amphibious vehicle provides a retracting process by which the wheels of the vehicle may be moved from a land-support position, to a water-borne position wherein the wheels are substantially above the waterline of the vehicle when afloat. The wheels are axle-driven, with pivotable connections allowing the axles to guide the retracting process; steering connections are pivotably able to follow the process, and steering motion is self-cancelling in the retracted mode. Suitable compartments enclose and support the apparatus in all positions, and seals are provided at the axles to prevent water entering the vehicle interior. A variety of devices may be employed to actuate the apparatus, and also to provide suspension to the vehicle on land.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: July 2, 1996
    Inventors: Terence J. Roycroft, Marie A. Roycroft
  • Patent number: RE36901
    Abstract: An apparatus for retracting axle-driven wheels onboard an amphibious vehicle provides a retracting process by which the wheels of the vehicle may be moved from a land-support position, to a water-borne position wherein the wheels are substantially above the waterline of the vehicle when afloat. The wheels are axle-driven, with pivotable connections allowing the axles to guide the retracting process; steering connections are pivotably able to follow the process, and steering motion is self-cancelling in the retracted mode. Suitable compartments enclose and support the apparatus in all positions, and seals are provided at the axles to prevent water entering the vehicle interior. A variety of devices may be employed to actuate the apparatus, and also to provide suspension to the vehicle on land.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: October 3, 2000
    Assignee: Gibbs Motor Company Ltd.
    Inventors: Terence J. Roycroft, Marie A. Roycroft