Arcuate bicyle crank lever apparatus

Details Arcuate bicyle crank lever apparatus Arcuate bicyle crank lever apparatus

1991-01-22

1992-06-30

Braun, Leslie A.

Machine element or mechanism

Elements

Cranks and pedals

745943, 745945, 280291, G05G 114

Patent

active

051252880

ABSTRACT:
An apparatus wherein diametrically opposed crank lever members are mounted to a central sprocket pin whose arc is defined by a first diameter substantially equal to one-half of a spacing between opposed ends of each crank lever to enhance application of force to the central pin involving inherent flexure and alignment of the terminal ends of each crank lever, with force factors directed at the opposed terminal ends by the pedal assemblies. A modification of the invention includes each crank lever formed with a coextensive, hollow chamber directed between opposed terminal ends of each crank lever, including a mercury column defined by a length less than the chamber length to enhance inertial application of the mercury fluid during initial rotation of the pedals in use.

REFERENCES:
patent: 359609 (1887-03-01), Jeffery
patent: 518456 (1894-04-01), Ide
patent: 612790 (1898-10-01), Tanner
patent: 2277748 (1942-03-01), Duffy
patent: 4009623 (1977-02-01), Smith et al.
patent: 4077648 (1978-03-01), Seul
patent: 4446753 (1984-05-01), Nagano
patent: 4606241 (1986-08-01), Fredriksson

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