Positive shift derailleur mechanism

Details Positive shift derailleur mechanism Positive shift derailleur mechanism

1979-02-07

1980-08-05

Love, John J.

Land vehicles

Wheeled

Occupant propelled type

474 80, 474129, B62M 912, F16H 900

Patent

active

042158729

ABSTRACT:
A derailleur gear shift mechanism for a bicycle, in which the drive chain transfer unit for moving the chain to selected gears is operated by a rigid push-pull rod actuating linkage. An actuating lever, accessibly mounted on the bicycle frame, is indexed to specific positions at which the linkage holds the chain transfer unit in accurate alignment with individual rear wheel drive sprockets. The mechanism is adaptable to many existing derailleur gear assemblies.

REFERENCES:
patent: 2108941 (1938-02-01), Morgan
patent: 2428166 (1947-09-01), LeTourneur
patent: 2431513 (1947-11-01), Schwinn
patent: 3863512 (1975-02-01), Crawley
patent: 3965763 (1976-06-01), Wechsler
patent: 4023424 (1977-05-01), Ryan et al.

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