Bicycle crank system

Details Bicycle crank system Bicycle crank system

1997-08-12

1999-06-15

Jeffrey, John A.

Machine element or mechanism

Elements

Cranks and pedals

745942, B62M 300

Patent

active

059117923

ABSTRACT:
This system is designed to eliminate the dead spot and enable the user to gain an increased stroke power, thus also increasing the speed of the bicycle. It is composed of a pair of crank arms of an obtuse configuration. Each crank presents an orifice, located at the middle part of the crank's vertex, that when connecting to the spindle allows them to integrate from left to right. These orifices function is to work as attachment and leaning point for the crank arms. Each crank arm opposite to the pedal receptor presents another orifice that will integrate through another element to the spindle, which will exercise the effect of traction, thus the function of the crank.

REFERENCES:
patent: D265812 (1982-08-01), Kastan
patent: D299221 (1989-01-01), Borromeo
patent: D319808 (1991-09-01), Cook
patent: 4706516 (1987-11-01), Xi
patent: 4811626 (1989-03-01), Bezin
patent: 5197353 (1993-03-01), Trenerry et al.
patent: 5257562 (1993-11-01), Nagano

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