Stepless transmission device for a bicycle

Details Stepless transmission device for a bicycle Stepless transmission device for a bicycle

1979-09-21

1981-11-10

Herrmann, Allan D.

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

74117, 474 70, F16H 1106, F16H 2906

Patent

active

042995817

ABSTRACT:
A stepless transmission device for a bicycle which has sufficient durability and smooth operation characteristics for practical use is provided. The transmission device can steplessly change the rotational ratio of a wheel to a drive sprocket by changing the oscillation angle of rachet arms which are radially disposed on the periphery of a disk fixed to a shaft for said sprocket. The transmission device is characterized in that said rachet arms incorporated with respective crank arms are pivoted to said sprocket in positions equally distributed on a coaxial circle, and one end of each crank arm constitutes a guide pin, said guide pin being engaged in an annular groove which is coaxially provided in a rotatable bearing race the eccentricity of which can be changed.

REFERENCES:
patent: Re30078 (1979-08-01), Harris
patent: Re30364 (1980-08-01), Harris
patent: 4164153 (1979-08-01), Moritsch

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