Sprocket ratio changer

Details Sprocket ratio changer Sprocket ratio changer

1995-06-07

1997-04-08

Schoeppel, Roger J.

Endless belt power transmission systems or components

Pulley with expansible rim means or pulleys with alternately...

Structure for variably adjusting radius of rim section

474 69, F16H 5900

Patent

active

056182406

ABSTRACT:
A chain shifting apparatus senses bias of pre-set peak pedal force to incrementally move a derailleur cable in a first direction, and to store spring energy. A governor apparatus senses peak cadence to move the cable in a second direction. A cam action from a pedalled-sprocket communicates a timing instant for shifting under low chain transmitting force. A derailleur cable motion distributor communicates single cable up-shift and down-shift instruction from a finger shift and from spring-loaded automatic collet actions to route chains onto available front or rear sprocket sets.

REFERENCES:
patent: 3487706 (1970-01-01), Resener
patent: 3828621 (1974-08-01), Uchino
patent: 4099737 (1978-07-01), Waugh
patent: 4201094 (1980-05-01), Rathmell
patent: 4598920 (1986-07-01), Dutil et al.
patent: 4599079 (1986-07-01), Chappell
patent: 4630839 (1986-12-01), Seol
patent: 5013285 (1991-05-01), Carlyle
patent: 5035678 (1991-07-01), Hageman
patent: 5152720 (1992-10-01), Browning et al.
patent: 5279524 (1994-01-01), Hilber
patent: 5407396 (1995-04-01), Gilbert

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