System and apparatus for improving safety and thrust from a...

Details System and apparatus for improving safety and thrust from a... System and apparatus for improving safety and thrust from a...

2006-11-28

2006-11-28

Olson, Lars A. (Department: 3617)

Marine propulsion

Screw propeller

Having means to control flow around propeller

C440S072000

Reexamination Certificate

active

07140931

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, a diverter connected with the shroud and angled in a direction selected to direct water to form a vortex as the water exits the shroud, and a screen connected with the second opening and configured to allow a substantially free flow of water and to prevent marine, plant, animal, and human life from contacting the hydro-drive device. The system may include a motor, a hydro-drive device coupled to the motor, and the apparatus.

REFERENCES:
patent: 4637801 (1987-01-01), Schultz
patent: 4680017 (1987-07-01), Eller
patent: 4832634 (1989-05-01), Kearns
patent: 5906522 (1999-05-01), Hooper
patent: 5928042 (1999-07-01), Quiggins

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