Lightly-operating automatic umbrella for preventing false operat

Details Lightly-operating automatic umbrella for preventing false operat Lightly-operating automatic umbrella for preventing false operat

1989-10-23

1990-07-17

Scherbel, David A.

Tent, canopy, umbrella, or cane

Umbrella

Inflatable

135 24, 135 28, 135 22, A45B 2516

Patent

active

049414941

ABSTRACT:
An automatic umbrella includes: a central shaft having an upper shaft telescopically mounted on a lower shaft, a rib assembly having at least a top rib and a stretcher rib supporting the top rib, an elongate extending spring inserted inside the central shaft which may be lightly operated for resetting the umbrella for restoring its elastic force for extending the shafts, the ribs and the umbrella, a plurality of restoring springs each secured in said rib assembly for normally urging and retracting the ribs, and a seesaw button seesawly formed in a grip of the shaft for selectively extending the shaft, the ribs for opening the umbrella, or for retracting the ribs for closing the umbrella.

REFERENCES:
patent: Re24477 (1958-05-01), Small
patent: 3658077 (1972-04-01), Sato
patent: 3672381 (1972-06-01), Kida et al.
patent: 3732881 (1973-05-01), Hirai
patent: 4421133 (1983-12-01), Huang
patent: 4535374 (1985-08-01), Day
patent: 4807655 (1989-02-01), Robertson
patent: 4823821 (1989-04-01), Day
patent: 4825888 (1989-05-01), Su

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