Spring assist drive for cycle

Details Spring assist drive for cycle Spring assist drive for cycle

1981-09-08

1983-11-22

Pekar, John A.

Land vehicles

Wheeled

Occupant propelled type

B62M 110

Patent

active

044164645

ABSTRACT:
A spring assist drive for pedal operated vehicles such as bicycles and tricycles makes use of a wind-up spring in the train of power from the pedal operated power sprocket to the drive sprocket for the rear drive wheel. The wind-up spring is a coil spring, the inside end of which is anchored to an axle for a relatively smaller sprocket in chain driving engagement with the sprocket on the rear drive wheel. The outside end of the spring is anchored to a relatively larger sprocket and chain driven from the pedal operated power sprocket.

REFERENCES:
patent: Re28335 (1975-02-01), Wood
patent: 635664 (1899-10-01), Coursey et al.
patent: 1015996 (1912-01-01), Corbitt
patent: 1612739 (1926-12-01), Matsumoto
patent: 2277391 (1942-03-01), Crumble

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