Lateral thrust drive unit for marine vessels

Details Lateral thrust drive unit for marine vessels Lateral thrust drive unit for marine vessels

2005-11-15

2005-11-15

Olson, Lars A. (Department: 3617)

Marine propulsion

Screw propeller

Having means to control flow around propeller

C114S151000

Reexamination Certificate

active

06964590

ABSTRACT:
A thrust drive unit for generating side thrust for improved maneuverability of a marine vessel employs a peripherally-driven propeller situated below the waterline and remotely powered by a motor situated well above the waterline via a drive belt. The propeller is supported by the two ends of the coaxial shaft by a pair of supports which are mounted on either side of the casing and are angularly adjustable with respect thereto about the thrust axis to a position which is least resistance-generating for a particular installation of the thrust drive unit on a vessel. The lower portion disposed for submerged operation has a substantially blade-like cross section with a narrow thickness aligned transversely to the longitudinal axis of the vessel. The cross section of the submerged portion is streamline shaped to help further minimize the resistance. Such hydro-dynamically efficient design makes the present invention well suited for being fixedly mounted in the operating position on a vessel for mechanical simplicity and ease of use, without compromising the vessel's performance.

REFERENCES:
patent: 2809605 (1957-10-01), Russell
patent: 3185122 (1965-05-01), Pleuger
patent: 4732104 (1988-03-01), Roestenberg
patent: 5152240 (1992-10-01), Fontanille
patent: 5435763 (1995-07-01), Pignata
patent: 5704306 (1998-01-01), Den Ouden

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