Self opening umbrella

Details Self opening umbrella Self opening umbrella

1990-10-09

1992-09-08

Scherbel, David A.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 28, A45B 2514

Patent

active

051449706

ABSTRACT:
The invention relates to a self opening umbrella having canopy rods (D) wh can be shortened in at least a twofold manner and having a stick (1) which is telescopic in at least two stages and has on it a displaceable slider (2), to which lower struts (3) of the canopy linkage are linked, and having a drive spring (F) for raising the slider and opening the frame. In order to reduce the manual force required when pulling the slider down upon closing the umbrella canopy and also to minimize the sliding friction of the spring on the stick, the spring (F) is to supported with its lower end (F') on a rigid abutment (W) of the stick (1) and acts on a crown (20) which is displaceable axially relatively to the top of the stick.

REFERENCES:
patent: 920505 (1909-05-01), Umstead
patent: 3746025 (1973-07-01), Murata
patent: 3837352 (1974-09-01), Weber
patent: 3902514 (1975-09-01), Weber
patent: 4007753 (1977-02-01), DeMarco
patent: 4676262 (1987-06-01), Yang
patent: 4739783 (1988-04-01), Yang
patent: 4766917 (1988-08-01), Yang
patent: 4966180 (1990-10-01), Lai

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