Spurring device capable of accelerating the speed of a bicycle u

Details Spurring device capable of accelerating the speed of a bicycle u Spurring device capable of accelerating the speed of a bicycle u

1999-04-12

2000-10-31

Hurley, Kevin

Land vehicles

Wheeled

Occupant propelled type

B62M 110

Patent

active

061390364

ABSTRACT:
A spurring device includes a carriage lever pivoted on a mounting frame around a pivot axis parallel to a rotating axis of a rear sprocket wheel of a bicycle. The carriage lever has a front lifted portion and a rear depressed portion opposite to each other relative to the pivot axis. The front lifted portion is adapted to be pulled by a manually operated brake cable to move upwards to bring the rear depressed portion towards a rear tire of the bicycle. A rear axle is rotatably mounted on the rear depressed portion around a rotating axis parallel to the pivot axis. A frictional rotary member is mounted on and is rotatable with the rear axle to frictionally engage the rear tire when the rear depressed portion is brought towards the rear tire so as to be driven together with the rear axle to rotate clockwise. Simultaneously, a first biasing member is disposed on the rear axle to accumulate a biasing force for urging the rear axle to rotate counterclockwise. A transmission sprocket wheel is rotatable with the rear axle, and is coupled with the rear sprocket wheel so as to be driven by the latter to rotate counterclockwise. The transmission sprocket wheel can transmit the rotation force of the rear axle to drive the rear sprocket wheel to rotate counterclockwise once the front lifted portion is relieved from being pulled.

REFERENCES:
patent: 784345 (1905-03-01), Pepper
patent: 2638359 (1953-05-01), Crumble
patent: 2965393 (1960-12-01), Cauchon
patent: 6053830 (2000-04-01), Glaeser

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