Bicycle gear shift unit

Details Bicycle gear shift unit Bicycle gear shift unit

1983-02-10

1985-10-22

Bonck, Rodney H.

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

74489, 745518, 745519, B62K 2302, B60K 2006, B60K 4126, G05G 508

Patent

active

045480923

ABSTRACT:
A bicycle gear shift unit permits a bicycle rider to effect a gear change without releasing the bicycle handlebars or brake handle. The shift unit includes a stationary base affixed to the handlebars and a rotatable base. A clutch mechanism allows the rider to return his hand to a selected position after changing gears.

REFERENCES:
patent: 3481217 (1969-12-01), Maeda
patent: 3856123 (1974-12-01), Kinsey
patent: 4100820 (1978-07-01), Evett
patent: 4189954 (1980-02-01), Nakamura et al.
patent: 4232564 (1980-11-01), Yamasaki
patent: 4267744 (1981-05-01), Yamasaki
patent: 4325267 (1982-04-01), Kojima
patent: 4343201 (1982-08-01), Shimano

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