Speed change device for a bicycle

Details Speed change device for a bicycle Speed change device for a bicycle

1988-07-11

1989-08-08

Braun, Leslie A.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74766, F16H 504, F16H 5710

Patent

active

048541915

ABSTRACT:
A speed change device for a bicycle is provided which includes a planetary gear mechanism in which a plurality of lock pawls are provided at a fixed shaft to control locking and unlocking of a plurality of sun gears. The sun gears are independently rotatably supported relative to a crank shaft. A plurality of clutch pawls corresponding to the lock pawls are provided at a control member, with the clutch pawls being actuated by driving rotation of the crank shaft. This enables the lock pawls to be controlled to move from a locking position to an unlocking position.

REFERENCES:
patent: 2301852 (1942-11-01), Brown
patent: 3973451 (1976-08-01), Kine
patent: 4262786 (1981-04-01), Taylor
patent: 4574928 (1986-03-01), Norton
patent: 4628769 (1986-12-01), Nagano
patent: 4651853 (1987-03-01), Bergles
patent: 4721015 (1988-01-01), Hartman

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