Marine propulsion – Screw propeller – Having means to control flow around propeller
Reexamination Certificate
2007-09-11
2007-09-11
Olson, Lars A. (Department: 3617)
Marine propulsion
Screw propeller
Having means to control flow around propeller
Reexamination Certificate
active
11333180
ABSTRACT:
A system and apparatus are disclosed for improving safety and hydro-flow thrust from a hydro-drive device. The apparatus may include a shroud having a first opening for the ingress of water, and a second opening for the egress of water, and a vane extending inward from an interior surface of the shroud. The vane is configured to direct water to form a vortex that exits the shroud. The vane may include a fixed, planar region and a moveable, curved region attached to an interior surface of the shroud. Alternatively, the vane may be attached to a surface of a paddle configured to adjust the diameter of the second opening. The system may include a motor, a hydro-drive device coupled to the motor, the shroud, and the vane.
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Enviroprop Corporation
Kunzler & McKenzie
Olson Lars A.
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