Reliably operated automatic umbrella with upwardly and downwardl

Details Reliably operated automatic umbrella with upwardly and downwardl Reliably operated automatic umbrella with upwardly and downwardl

1994-05-03

1994-11-08

Mai, Lanna

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 251, 135 38, A45B 2514

Patent

active

053617924

ABSTRACT:
An automatic umbrella includes a central shaft pivotally secured with a plurality of ribs on the shaft and a handle vertically slidably secured with a push button which can be pushed upwardly for opening the umbrella as urged by an opening spring retained in the shaft and may be pushed downwardly for closing the umbrella as effected by a closing spring retained in the shaft for preventing a confusing or false operation when extending or folding the umbrella.

REFERENCES:
patent: 3856030 (1974-12-01), Sato
patent: 4534374 (1985-08-01), Day
patent: 4825888 (1989-05-01), Su
patent: 5224505 (1993-07-01), Wu
patent: 5232004 (1993-08-01), Wu

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