Bicycle transmission having infinitely variable drive ratio

Details Bicycle transmission having infinitely variable drive ratio Bicycle transmission having infinitely variable drive ratio

1987-11-16

1989-06-27

Massie, IV, Jerome W.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including mechanism for shifting belt axially on spaced...

474140, F16H 908

Patent

active

048425699

ABSTRACT:
A torque transmission apparatus having an infinitely variable gear ratio particularly suited for use as a bicycle transmission. The apparatus may be mounted on conventional bicycles and replaces the usual derailleur mechanism. A novel means is used to effect the gear changes which requires less force than previous devices. All force transmitting components of the apparatus are mechanically engaged without relying on friction which eliminates any possibility of slippage within the transmission.

REFERENCES:
patent: 390216 (1888-10-01), Evans
patent: 1637664 (1927-07-01), Stoeckicht
patent: 2432442 (1947-12-01), Pourtier
patent: 2801547 (1957-08-01), Guibert
patent: 2807171 (1957-09-01), Wyckoff
patent: 3043149 (1962-07-01), Davin et al.
patent: 3394602 (1968-07-01), Coghill
patent: 3906809 (1975-09-01), Erickson
patent: 3934492 (1976-01-01), Timbs

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