Tricycle crank structure

Details Tricycle crank structure Tricycle crank structure

2007-07-10

2007-07-10

Winner, Tony (Department: 3611)

Land vehicles

Convertible

C280S259000, C280S294000

Reexamination Certificate

active

11209634

ABSTRACT:
A tricycle crank structure comprises a wheel axle, a pair of cranks and a pair of pedals. The wheel axle is provided with a pair of non-circular sectional holes at respective ends. The inner wall of each hole is provided with a recess. Each crank has one end pivotally connected to the pedal and another end provided with a connecting section. The connecting section is provided with a tenon to engage with the recess of the hole for quick mounting and dismounting. Each hole may be provided with a pair of through holes, and each crank is provided with an elastic clip for connection.

REFERENCES:
patent: 3648542 (1972-03-01), Perotti et al.
patent: 4171822 (1979-10-01), Thun
patent: 5273300 (1993-12-01), Wells
patent: 5934155 (1999-08-01), Lai
patent: 6708998 (2004-03-01), Blake
patent: 2003/0080528 (2003-05-01), Damon et al.

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