Patents by Inventor Douglas T. Thorpe

Douglas T. Thorpe 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: 5117776
    Abstract: A rectractable hydrofoil for watercraft wherein a linking mechanism connects all hydrofoils to a retaining assembly. The application of an external force to a hydrofoil above a threshold causes the release of the retaining means without requiring the reaction of the operator. A control assembly within the hull is utilized by the operator to complete the movement of the hydrofoil to an aft retracted position. The retaining assembly includes a releasable securing means for maintaining the hydrofoils in the retracted position.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: June 2, 1992
    Inventor: Douglas T. Thorpe