Auto-opening umbrella

Details Auto-opening umbrella Auto-opening umbrella

1998-06-22

2000-12-12

Stephan, Beth A.

Tent, canopy, umbrella, or cane

Umbrella

Collapsible in length

135 23, 135 40, 135 2531, 135 2532, A45B 1906

Patent

active

061584525

ABSTRACT:
An auto-opening mechanism can make the pivotal coupling between the supporting ribs and the linkage beams highly firm and secure while nonetheless retaining the light-weighted quality of the supporting ribs The folding frame structure is more durable than the prior art by using enforced light-weighted materials such as FRP to form the umbrella frame and steel bars to form the linkage beams. Therefore, the foldable frame structure is longer in the life of use than the prior art.

REFERENCES:
patent: 256774 (1882-04-01), Watson
patent: 604275 (1898-05-01), Stover
patent: 2877782 (1959-03-01), Zimmermmann
patent: 5050627 (1991-09-01), Hengtzu

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