Multi-geared bicycle transmission assembly comprising internal g

Details Multi-geared bicycle transmission assembly comprising internal g Multi-geared bicycle transmission assembly comprising internal g

1993-04-05

1995-01-03

Schoeppel, Roger J.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including coaxial pulleys shiftable axially to align...

475302, 475343, F16H 900, F16H 6100

Patent

active

053782011

ABSTRACT:
A transmission assembly for a bicycle which is able to achieve variations in rotational force and velocity through internal gearing mechanisms which require no variation in sprocket diameter. The transmission assembly includes a front and rear transmission means, and a chain which connects them. Each transmission means includes one or more sprockets and gear sets with which the chain connects. Each gear set then includes a sun gear, a plurality of planetary pinions which rotate and revolve around the sun gear, a ring gear encasing the planetary pinions, and a carrier to which the planetary pinions are attached. This assembly helps prevent the chain from derailling, quickens the shifting process, and simplifies the structure and construction of transmission assemblies for bicycles.

REFERENCES:
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patent: 4181043 (1980-01-01), Waddington
patent: 4260386 (1981-04-01), Frohardt
patent: 4281845 (1981-08-01), Brown
patent: 4283069 (1981-08-01), Citelli
patent: 4400999 (1983-08-01), Steuer
patent: 4706982 (1987-11-01), Hartmann
patent: 4712450 (1987-12-01), Takamiya et al.
patent: 4782722 (1988-11-01), Powell
patent: 4854191 (1989-08-01), Nagano
patent: 5292286 (1994-03-01), Lan

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