Patents Represented by Attorney Abram W. Hatcher

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  • Twin-propeller stern drive
    Patent number: 3954083
    Abstract: Twin-propeller stern drive propulsion unit having automatic thrust alignment trim and retractable hydrofoils for improved shallow water operation. Retention of optimum thrust direction is accomplished automatically by parallel geometry action of a cross-plane trim actuator with a vertical drive shaft housing attached to an underwater unit.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: May 4, 1976
    Assignee: The Mocaire Company
    Inventor: James K. Frostrom