Patents by Inventor Robert James Windt

Robert James Windt 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).

  • Automatic lift system for air cushion vehicles
    Patent number: 3968851
    Abstract: An air cushion vehicle in which the lift fan and the propulsion unit are driven from the same engine in such a way as to automatically keep the lift fan at a constant speed to maintain correct lift while the engine and propulsion unit speed varies from just above idle up to maximum speed. The lift fan is driven by means of two automatically adjustable pulleys, one of which senses torque from the lift fan and adjusts its effective diameter, the other being adjusted by spring force.
    Type: Grant
    Filed: March 14, 1975
    Date of Patent: July 13, 1976
    Inventor: Robert James Windt