Multiple speed shaft drive for a bicycle

Details Multiple speed shaft drive for a bicycle Multiple speed shaft drive for a bicycle

1995-12-29

1997-04-22

Marmor, Charles A.

Machine element or mechanism

Gearing

Interchangeably locked

74347, 280238, 280260, F16H 308, B62M 1104

Patent

active

056220812

ABSTRACT:
A multiple speed shaft drive for a bicycle, including: a forward disk having a plurality of concentrically disposed ring gears, wherein the forward disk is connected with the pedal crank of the bicycle; a rearward disk having a plurality of concentrically disposed ring gears, wherein the rearward disk is connected to the rear wheel hub; a forward drive shaft; a rearward drive shaft; a free wheel mechanism connecting the forward drive shaft to the rearward drive shaft; a forward pinion gear slidably mounted to the forward drive shaft; a rearward pinion gear slidably mounted to the rearward drive shaft; a forward gear shift mechanism for moving the forward pinion gear into gearing engagement with a selected ring gear of the forward disk; a rearward gear shift mechanism for moving the rearward pinion gear into gearing engagement with a selected ring gear of the rearward disk; and a clutch mechanism which automatically disengages the rearward hub from gearing engagement with the rearward pinion gear whenever a gear shift is made with a shift control operated by the cyclist.

REFERENCES:
patent: 3863503 (1975-02-01), Loeb et al.
patent: 4447068 (1984-05-01), Brooks
patent: 5078416 (1992-01-01), Keyes
patent: 5136892 (1992-08-01), Ochs
patent: 5136893 (1992-08-01), Wilhelmy
patent: 5228354 (1993-07-01), Oosterwal et al.
patent: 5251504 (1993-10-01), Summerville, Jr. et al.
patent: 5273500 (1993-12-01), Nagano
patent: 5342075 (1994-08-01), Williams
patent: 5496049 (1996-03-01), Escobedo

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