Windproof umbrella having an improved rib linkage system

Details Windproof umbrella having an improved rib linkage system Windproof umbrella having an improved rib linkage system

1997-06-13

1998-12-01

Friedman, Carl D.

Tent, canopy, umbrella, or cane

Umbrella

Rib and stretcher joints

135 31, A45B 2500

Patent

active

058424938

ABSTRACT:
A windproof umbrella having an improved rib linkage system which is effective for providing support for an umbrella canopy during normal operating conditions, which is capable of restoring the umbrella to a normal open water-shielding configuration after the canopy has been inverted by strong wind or a gust, which is relatively easy to operate, relatively inexpensive to manufacture, and which has relatively good reliability for use during periods of sustained winds or gusts.

REFERENCES:
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patent: 3893467 (1975-07-01), Wingen
patent: 4007752 (1977-02-01), Weber
patent: 5063953 (1991-11-01), Wu
patent: 5135016 (1992-08-01), Stiller
patent: 5235998 (1993-08-01), Liu
patent: 5337770 (1994-08-01), Wang
patent: 5370144 (1994-12-01), Yang
patent: 5435331 (1995-07-01), Okuda
patent: 5551463 (1996-09-01), Wang
patent: 5553634 (1996-09-01), Yang
patent: 5597004 (1997-01-01), Okuda

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