Marine propulsion – Screw propeller – Having transmission
Patent
1994-05-24
1995-05-16
Sotelo, Jesus D.
Marine propulsion
Screw propeller
Having transmission
464 39, 192 55, B63H 2128
Patent
active
054155754
ABSTRACT:
An apparatus and method is provided to release a propeller from the driving engagement of a propeller shaft when the propeller hits an object with sufficient force to otherwise cause damage to the marine drive. A clutch with first and second clutch members disengagably drives the propeller with a plurality of clutch teeth on one of the clutch members and a corresponding plurality of clutch sockets on the other. The clutch teeth and clutch sockets engage to provide a nonslip direct drive from the propeller shaft to the propeller and disengage to allow the propeller shaft to rotate free of the propeller when the propeller strikes an object. The clutch members are biased together such that the clutch teeth engage the clutch sockets during normal boating operation. The torque required to disengage the clutch may be adjustable by an adjustable retaining nut, or by using a spring of different compression rate, or by changing the characteristics of the clutch teeth or clutch sockets. Preferably, the torque required to disengage the clutch is set to a level just below that which would cause damage to the marine drive.
REFERENCES:
patent: 2062593 (1936-12-01), McCloud
patent: 2185457 (1940-01-01), Conover
patent: 2402197 (1946-06-01), Kincannon
patent: 2477521 (1949-07-01), Martin
patent: 2569144 (1951-09-01), Benson
patent: 2633923 (1953-04-01), Hartz
patent: 2751987 (1956-06-01), Kiekhaefer
patent: 3880267 (1975-04-01), Auble et al.
patent: 4778419 (1988-10-01), Bolle et al.
patent: 5244348 (1993-09-01), Karls et al.
Brunswick Corporation
Sotelo Jesus D.
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