Tetrahelical/curved bicycle crank-arm connecting rod for human/m

Details Tetrahelical/curved bicycle crank-arm connecting rod for human/m Tetrahelical/curved bicycle crank-arm connecting rod for human/m

1995-12-27

1998-08-11

Ta, Khoi Q.

Machine element or mechanism

Elements

Cranks and pedals

D12123, B62M 300

Patent

active

057912025

ABSTRACT:
A curved, tetrahelix bicycle crank arm composed of a helical array of tetrahedra. This design will transmit the propelling force away from the top dead center point providing more efficient use of the propelling energy. With this Tetrahelical design a hollow core is possible that will reduce weight and permit lubrication if needed without reducing strength. This design is also applicable to the connecting rod of internal or external combustion engine.

REFERENCES:
patent: D23640 (1894-09-01), Grinden
patent: D27781 (1897-10-01), Anderson et al.
patent: D32349 (1900-03-01), Price
patent: D365049 (1995-12-01), Kuylman
patent: 626630 (1899-06-01), Peerstone
patent: 3221464 (1965-12-01), Miller
patent: 5020287 (1991-06-01), Woods
patent: 5125288 (1992-06-01), Amiet

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