Patents by Inventor Randolph J. Rust

Randolph J. Rust 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).

  • Hydrofoil propulsion system
    Patent number: 4962718
    Abstract: A hydrofoil propulsion system (10) utilizing dual water propellers (16) in combination with dual shrouded air propellers (18). The air propellers (18) and the water propellers (16) are powered by diesel engines (22) mounted in pairs inside the hull (24) of the hydrofoil craft (b 14). Each water propeller (16) is affixed to an outdrive 35 through a pivotal propeller shaft (28) that permits the propeller shaft (28) and the water propeller (16) to move horizontally and vertically with respect to the hull (24). An air propeller (18) and a water propeller (16) are each coupled to a single pair of engines (22) so that as the craft (14) transitions from the hullborne mode to the foilborne mode, the thrust load is automatically transferred from the water propeller (16) to the air propeller (18).
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: October 16, 1990
    Assignee: Westfoil International
    Inventors: Robert J. Gornstein, Richard J. Rust, William Husa, Randolph J. Rust