Gear crank for a bicycle

Details Gear crank for a bicycle Gear crank for a bicycle

1980-04-24

1982-05-25

Dorner, Kenneth

Machine element or mechanism

Elements

Cranks and pedals

G05G 114

Patent

active

043310435

ABSTRACT:
A gear crank for a bicycle, comprising a crank shaft, a pair of crank arms, and a chain gear has crank arm mounting portions at both axial ends of the crank shaft provided with supports having round outer peripheral surfaces and, axes offset with respect to the axis of rotation of the crank shaft respectively. The crank arms are removably mounted to the supports to allow for a changing of the angular position of the crank arms relative to the supports, whereby the angular positions are changed to adjust the length between the axis of rotation of the crank shaft and the utmost end of each crank arm.

REFERENCES:
patent: 596550 (1898-01-01), Siglow
patent: 3347112 (1967-10-01), Thun

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