Double action umbrella

Details Double action umbrella Double action umbrella

1983-05-08

1985-06-18

Hafer, Robert A.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 20B, 135 20M, 135 24, A45B 2514, A45B 2516

Patent

active

045236011

ABSTRACT:
A device is disclosed whereby both the opening and the closing of a device commonly known as an umbrella is accomplished automatically.

REFERENCES:
patent: 4169456 (1979-10-01), Van House
patent: 4421133 (1983-12-01), Huang

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