Bicycle

Details Bicycle Bicycle

1984-02-21

1985-12-24

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Occupant propelled type

280259, B62M 102

Patent

active

045601828

ABSTRACT:
A torque generating mechanism for a chain drive system of a bicycle which comprises a main shaft fixed with a chain wheel and a first gear, an auxiliary shaft arranged parallel to the main shaft, a second gear fixed to the auxiliary shaft so as to mesh with the first gear, a first lever fixed to the auxiliary shaft, a first crank lever pivotally connected to the free end of the first lever and formed with a guide slot which is engaged with a protruding pin formed eccentrically of the chain wheel, an auxiliary lever fixed to the other end of the main shaft and provided with a protruding pin at the top end thereof, a second lever fixed to the other end of the auxiliary shaft, a second crank lever pivotally connected to the second lever and provided with a guide slot which is engaged with the protruding pin, and a pair of pedals pivotally connected to the free end of each crank lever. The crank lever can move in a non-circular path so that the pedal is moved in the most forward position when the rider applies the pedaling force, thereby increasing torque for driving the bicycle.

REFERENCES:
patent: 546954 (1895-09-01), Decker
patent: 4029334 (1977-06-01), Trammell, Jr.
patent: 4159652 (1979-07-01), Trammell, Jr.

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