Space maximizing means for keeping or storing bicycles

Details Space maximizing means for keeping or storing bicycles Space maximizing means for keeping or storing bicycles

2005-11-29

2005-11-29

Luong, Vinh T. (Department: 3682)

Machine element or mechanism

Elements

Cranks and pedals

C074S594100, C280S278000, C280S287000

Reexamination Certificate

active

06968754

ABSTRACT:
A crank arm (1) is provided that is connected to the crank head (2) through an elastic rotation axis (6) and a lock axis (7) having a reduced diameter (D) in the middle of said lock axis (7), the crank arm (1) also comprises a lock device (4) that is connected to the push button (5) and both together are easily moved down and upward with the user's thumb to release and lock the crank arm (1) between its operative and folded position, when the lock device (4) is pulled down a retaining spring (3) is compressed allowing the upper end of the lock axis (7) to flush with the crank arm hole (H) and releasing the crank arm (1) to rotate freely along its longitudinal plane with a 180° rotation angle in relation to the elastic rotation axis (6), by releasing the lock device (4) to its upper position it will lock the crank arm (1) at its folded position, then the fixation of the pedal-sprocket on the head crank (2) is performed by means of a fastening nut (5) which fix the crank head (2) to any commercially available pedal-sprocket.

REFERENCES:
patent: 599978 (1898-03-01), Tanner
patent: 2384139 (1945-09-01), Schwinn
patent: 4429890 (1984-02-01), Hon
patent: 4440414 (1984-04-01), Wang
patent: 4634138 (1987-01-01), Fryer et al.
patent: 4824131 (1989-04-01), Thay
patent: 4842292 (1989-06-01), Wang
patent: 2-127184 (1990-05-01), None
patent: 6-239282 (1994-08-01), None
patent: 6-239283 (1994-08-01), None

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