Two-speed bicycle hub with coaster brake and pedal actuated spee

Details Two-speed bicycle hub with coaster brake and pedal actuated spee Two-speed bicycle hub with coaster brake and pedal actuated spee

1977-07-27

1978-10-10

Wyche, Benjamin W.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

B60K 2902

Patent

active

041191820

ABSTRACT:
In a hub for the rear wheel of a bicycle, pawl-and-ratchet clutches connect the planet carrier and the ring gear of a planetary gear transmission with ratchet teeth on the hub shell. The pawls on the faster turning ring gear may be retracted by an annular cam face on a control ring whose position relative to the pawls is shifted by back-pedaling. The configuration of the cam face is such as to prevent interference of a coaster brake, also actuated by back-pedaling, with the speed shifting action and vice versa.

REFERENCES:
patent: 3648809 (1972-03-01), Schwerdhofer
patent: 3878737 (1975-04-01), Schulz

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