Marine contra-rotating propeller drive system

Details Marine contra-rotating propeller drive system Marine contra-rotating propeller drive system

1989-11-28

1990-10-16

Peters, Jr., Joseph F.

Marine propulsion

Screw propeller

Propeller arrangement

244 60, 416129, B63H 2324

Patent

active

049631080

ABSTRACT:
A marine contra-rotating propeller system comprises a large gear driven by an engine, and a plurality of small gears disposed so as to respectively mesh with the large gear at a plurality of fixed positions along the circumference of the large gear. Planet gears are respectively mounted to the gear shafts of the small gears. A sun gear and an inner-toothed gear are respectively meshed with the planet gears. A rear propeller is mounted to an inner shaft serving as a gear shaft of the sun gear. A front propeller is mounted to a tubular outer shaft serving as a gear shaft of the inner-toothed gear. The present invention can eliminate, with the simple construction, the inconvenience caused by a differential planetary gear operations in the prior art, can derive a propeller efficiency to the maximum extent.

REFERENCES:
patent: 2480806 (1949-08-01), Desmoulins

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