Eccentrically operating speed-variating means for bicycle

Details Eccentrically operating speed-variating means for bicycle Eccentrically operating speed-variating means for bicycle

1987-12-21

1989-12-26

Pekar, John A.

Land vehicles

Wheeled

Occupant propelled type

474 50, B62M 908

Patent

active

048893544

ABSTRACT:
A variable speed adjuster for a bicycle includes: a driving disk secured to a bike hub or spokes having a plurality of radial slots formed in the driving disk, a collar secured with a chain wheel driven by a driving chain of a bike pedal having a plurality of sliding blocks slidably engaged in an annular groove formed in the collar each sliding block formed with a sliding roller protruding inwardly to slidably engage each radial slot in the driving disk and an eccentric plate rotatably secured with the collar and fixed on the axle of a bike wheel, wherein the eccentric plate is adjustably biased to allow the collar and the chain wheel to be eccentric to the axle, thereby resulting in a variation of drive ratio of running speed of a bike wheel.

REFERENCES:
patent: 4309043 (1982-01-01), Brown
patent: 4598920 (1986-07-01), Dutil

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