Tandem propeller assembly for a marine propulsion unit

Details Tandem propeller assembly for a marine propulsion unit Tandem propeller assembly for a marine propulsion unit

1992-08-26

1994-05-10

Oberleitner, Robert J.

Marine propulsion

Screw propeller

Propeller arrangement

440 81, 440 52, B63H 114

Patent

active

053103718

ABSTRACT:
A tandem propeller assembly for use with a marine propulsion unit is disclosed wherein a single shock-absorber assembly is utilized to assure damping effects for both propellers so as to protect the propulsion system from being damaged when either propeller is obstructed by drifting wood or other debris. Each of the preferred embodiments disclosed provides a simple structure for absorbing impacts upon either propeller in a tandem propeller assembly while minimizing any increase in the surface area of contact with the water which would increase the propulsion resistance and would result in speed loss.

REFERENCES:
patent: 374985 (1887-12-01), Merlette
patent: 1001984 (1911-08-01), Rolka
patent: 1360037 (1920-11-01), Shunnard
patent: 2672115 (1954-03-01), Conover
patent: 2691356 (1954-10-01), Waterval
patent: 2772649 (1956-12-01), Gensheimer
patent: 4486181 (1984-12-01), Cavil

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