Pedal crank mechanism comprising a sprocket wheel

Details Pedal crank mechanism comprising a sprocket wheel Pedal crank mechanism comprising a sprocket wheel

1986-08-07

1988-06-28

Smith, Gary L.

Machine element or mechanism

Elements

Cranks and pedals

745942, G05G 114, B62M 2100

Patent

active

047531274

ABSTRACT:
In a pedal crank mechanism at least one curved coupling spring is provided for resiliently coupling the pedal crank and the sprocket wheel and is resiliently backed by at least one backing member carried by the sprocket wheel or by the pedal crank. The curved coupling spring engages the backing member at retaining means which are carried by the sprocket wheel or by the pedal crank, or at a point spaced from said retaining means. From the zone in which said coupling spring is backed by the backing member, the coupling spring extends so as to progressively increase its radial distance from the backing surface of the backing member.

REFERENCES:
patent: 634278 (1899-10-01), Stilmant
patent: 721943 (1903-03-01), Dockstader
patent: 1021957 (1912-04-01), Walter

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