Automatic single push button type umbrella

Details Automatic single push button type umbrella Automatic single push button type umbrella

1987-05-11

1989-04-25

Scherbel, David A.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 22, A45B 2516

Patent

active

048238210

ABSTRACT:
An umbrella is expanded by spring action and collapsed by spring action. Both spring actions are initiated by a single push button which is manually manipulated in the same manner for initiating both spring actions.

REFERENCES:
patent: 3658077 (1972-04-01), Sato
patent: 3746025 (1973-07-01), Murata
patent: 3856030 (1974-12-01), Sato
patent: 4421133 (1983-12-01), Huang
patent: 4534374 (1985-08-01), Day
patent: 4548222 (1985-10-01), Day
patent: 4685482 (1987-08-01), Yung

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