Umbrella

Details Umbrella Umbrella

1981-09-22

1983-12-20

Skogquist, Harland S.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 24, A45B 2516

Patent

active

044211333

ABSTRACT:
An automatically opening and closing umbrella comprising a telescoping shaft having a middle tube, an outer tube slidably disposed over the middle tube, and two inner tubes longitudinally displaced and slidably disposed within the middle tube. Notches are provided at the top of the middle tube, the upper inner tube, and the outer tube. Between the two inner tubes is a first spring abutting against the ends thereof. A second spring is coaxially disposed over the middle tube between the notches of the middle tube and the outer tube. Locking members are provided to fix the position of the tubes, thus biasing the springs. When a first locking member is released, the first spring causes the umbrella to open. When a second locking member is released, the second spring causes the umbrella to close.

REFERENCES:
patent: 192822 (1877-07-01), Galbraith
patent: 2187372 (1940-01-01), Capaldo
patent: 2705967 (1955-04-01), Zimmermann
patent: 2906277 (1959-09-01), Militano
patent: 3658077 (1972-04-01), Sato
patent: 3677274 (1972-07-01), Yasuda

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