Automatic gearshifting device of multi-stage fly wheel of bicycl

Details Automatic gearshifting device of multi-stage fly wheel of bicycl Automatic gearshifting device of multi-stage fly wheel of bicycl

1998-06-17

2000-01-18

Graysay, Tamara L.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including belt shiftable axially from one to another surface...

474 78, 474 82, F16H 900

Patent

active

060153601

ABSTRACT:
An automatic gearshifting device of a bicycle multi-stage fly wheel is composed of a main body, a rotary shaft, an urging member, a plurality of weights located in a receiving cell of the main body, and a drive chain guiding mechanism. The rotary shaft is fastened pivotally with the main body. The urging member is slidably mounted on the rotary shaft such that the urging member is capable of being actuated by the centrifugal force of the weights in motion to slide in the direction of the longitudinal axis of the rotary shaft so as to enable the drive chain guiding mechanism to shift the drive chain from one tooth to another tooth of the bicycle multi-stage fly wheel gear cluster.

REFERENCES:
patent: 3552233 (1971-01-01), Schwerdhofer
patent: 3661034 (1972-05-01), Schwerdhofer et al.
patent: 3830521 (1974-08-01), Gardel et al.
patent: 4789379 (1988-12-01), Ozaki et al.
patent: 4832662 (1989-05-01), Nagano
patent: 4887990 (1989-12-01), Bonnard et al.
patent: 5163881 (1992-11-01), Chattin
patent: 5295916 (1994-03-01), Chattin
patent: 5624335 (1997-04-01), Ando

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