Automatic umbrella opened and closed by a straightforward push b

Details Automatic umbrella opened and closed by a straightforward push b Automatic umbrella opened and closed by a straightforward push b

1991-02-15

1992-01-07

Scherbel, David A.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 251, A45B 2514

Patent

active

050781650

ABSTRACT:
An automatic umbrella includes: a central shaft having an upper shaft telescopically mounted on a lower shaft secured in a grip, a rib assembly pivotally secured to the central shaft, an extending spring for extending the ribs and opening the umbrella, a retraction restoring spring for closing the umbrella, and a straightforward push button resiliently retained in said grip which may be straightforwardly depressed to actuate an opening controller for opening the umbrella conveniently, and may also be further depressed straightforwardly to actuate a closing controller for easily closing the umbrella, without the need for selectively depressing a specific location on a push button.

REFERENCES:
patent: 4534374 (1985-08-01), Day
patent: 4682617 (1987-07-01), Schultes et al.
patent: 4825888 (1989-05-01), Su
patent: 4860776 (1989-08-01), McQuain
patent: 4928718 (1990-05-01), Apple
patent: 4936332 (1990-06-01), Wu
patent: 4941494 (1990-07-01), Wu
patent: 4986294 (1991-01-01), Wu
patent: 4989625 (1991-02-01), Wu

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