Bicycle chain wheel assembly and crank arm

Details Bicycle chain wheel assembly and crank arm Bicycle chain wheel assembly and crank arm

1994-03-03

1996-01-02

Schoeppel, Roger J.

Endless belt power transmission systems or components

Positive drive pulley or guide roll

And additional coaxial surface for engaging same belt in...

74447, 745942, F16H 5512

Patent

active

054803594

ABSTRACT:
A chain wheel assembly for a bicycle includes a large chain wheel, a small chain wheel, and a crank arm for supporting the chain wheels. The crank arm has an arm body, a boss for connecting the crank arm to a crank axle of the bicycle, and wheel mounting extensions extending radially outwardly from the boss. The small chain wheel is connected to the crank arm through a first connecting device provided on the wheel mounting extensions. The large chain wheel is connected to the small chain wheel through a second connecting device arranged radially outwardly of the first connecting device. The large chain wheel is connected to the crank arm only through the second connecting device and small chain wheel.

REFERENCES:
patent: 3815439 (1974-06-01), Tarutani
patent: 4009621 (1977-03-01), Segawa
patent: 4380445 (1983-04-01), Shimano
patent: 4439172 (1984-03-01), Segawa
patent: 5085620 (1992-02-01), Nagano

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