Umbrella

Details Umbrella Umbrella

1998-04-08

1999-02-02

Mai, Lanna

Tent, canopy, umbrella, or cane

Umbrella

Ribs and stretchers

135 337, 135 252, A45B 2500

Patent

active

058652019

ABSTRACT:
An umbrella includes an improved frame consisting of ribs, stretchers, stretcher extensions and position members, and then assembled with a support rod, a lower panel and an upper panel. The ribs, the stretchers and the stretcher extensions are assembled together with the position members and pivots so as to become collapsible and extensible to form two layers of panels. The upper panel and the lower panel form a gap between them for a wind to blow out. The combination of the upper panel and lower panel coupled to the finish frame for preventing collapse of the umbella when a wind force is applied.

REFERENCES:
patent: 177339 (1876-05-01), Kirkham
patent: 212457 (1879-01-01), Girbardt
patent: 573375 (1896-12-01), Whitney
patent: 855142 (1907-05-01), Steininger
patent: 1052954 (1913-02-01), Podmaniczky
patent: 3374798 (1968-03-01), Samuelson
patent: 3853136 (1974-12-01), Schwartzenberg
patent: 4984599 (1991-01-01), Hwang
patent: 5193565 (1993-03-01), Huang
patent: 5305770 (1994-04-01), DeMarco
patent: 5482069 (1996-01-01), Lee

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