Chain drive marine propulsion system with dual counterrotating p

Details Chain drive marine propulsion system with dual counterrotating p Chain drive marine propulsion system with dual counterrotating p

1988-09-09

1989-12-19

Peters, Jr., Joseph F.

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

440 75, B63H 2542

Patent

active

048879835

ABSTRACT:
A chain drive marine propulsion system employs dual counterrotating propellers. The propellers are mounted to concentric propeller shafts disposed in the lower end of a depending gearcase. The concentric propeller shafts are each provided with a lower sprocket engaging a chain. A counterrotation mechanism is provided for driving the chains in opposite directions, thereby resulting in counterrotation of the propellers. Various embodiments for driving the chains in opposite directions are disclosed.

REFERENCES:
patent: 902362 (1908-10-01), Adnson
patent: 2064195 (1936-12-01), De Michels
patent: 3478620 (1969-11-01), Shimanckas
patent: 3795219 (1974-03-01), Peterson
patent: 4273545 (1981-06-01), Pehrsson

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