Chain wheel and crank for a bicycle

Details Chain wheel and crank for a bicycle Chain wheel and crank for a bicycle

1978-03-17

1979-04-24

Butler, Douglas C.

Cutlery

74217B, 301105B, 3081795, 308192, F16C 304

Patent

active

041508599

ABSTRACT:
A bicycle chain wheel and crank of three pieces, namely a crank shaft and a pair of crank arms. The crank shaft freely rotatably supports the chain wheel through a cone, so that the crank is easy and inexpensive to manufacture. The crank arms can be of common shape because a chain wheel mounting boss does not have to be formed on the crank arm.

REFERENCES:
patent: 1288956 (1918-12-01), Miller
patent: 3492883 (1970-02-01), Maeda

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