Bicycle transmission

Details Bicycle transmission Bicycle transmission

1993-12-27

1996-05-21

Lorence, Richard M.

Machine element or mechanism

Gearing

Interchangeably locked

74331, 280238, F16H 308

Patent

active

055178731

ABSTRACT:
A bicycle transmission, comprising a primary axis mechanically linked to bicycle pedals, an intermediate axis, and a final axis, mechanically attached to the bicycle drive wheel. Gears of different sizes are located on each axis. The intermediate axis contains gears mounted in fixed locations along the intermediate axis. The primary axis has a group of gears that are movable along the primary axis so as to vary which gears on the primary axis engage gears on the intermediate axis. The final axis also has a group of gears that are movable along the final axis, so as to vary which gears on the final axis engage gears on the intermediate axis. Gear covers engage gears on the primary axis and final axis to move them along the primary axis and final axis, so as to obtain various combinations of gears, to vary the overall gearing ratios between the pedals and the drive wheel.

REFERENCES:
patent: 1322388 (1919-11-01), Wood
patent: 2061225 (1936-11-01), Duvall
patent: 2210221 (1940-08-01), Sperry
patent: 2431982 (1947-12-01), Barnett
patent: 4666172 (1987-05-01), Hartmann
patent: 4823641 (1989-04-01), Kuhn et al.
patent: 4955247 (1990-09-01), Marshall

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