Power transmission system particularly useful for bicycles

Details Power transmission system particularly useful for bicycles Power transmission system particularly useful for bicycles

1988-08-09

1989-03-28

Bui, Thuy M.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

74 63, 280236, 280256, 474152, F16H 900

Patent

active

048160091

ABSTRACT:
A power transmission system particularly useful for a foot-operated bicycle comprises a pair of axle sections coaxially-mounted with respect to each other, each fixed to one of the crank arms and each rotatable independently of the other; and coupling mechanism between the pair of axle sections and the chain wheel effective to cause the angular velocity of one crank arm to decrease relative to the other for a portion of a rotary cycle, and then to increase relative to the other for the remaining portion of a rotary cycle, such that as the one crank arm approaches the lower dead-center position after completing a forceful downward stroke, the other crank arm has passed the upper dead-center position preparatory to starting another forceful downward stroke.

REFERENCES:
patent: 3929025 (1975-12-01), Perry
patent: 4164153 (1979-08-01), Moritsch etal.
patent: 4560182 (1985-12-01), Yamaguchi
patent: 4608035 (1986-08-01), Reader

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