Multiple-fold automatic umbrella controlled by single push button
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United States of America Patent
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-
Dec 7, 1993
Grant Date -
N/A
app pub date -
Mar 30, 1992
filing date -
Mar 30, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An automatic umbrella with multiple folds particularly of triple folds includes: a central shaft device having an upper, a middle, and a lower tubular shaft telescopically engageable with one another and having a grip formed on a lower portion of the central shaft device, a controller formed in the grip for controlling an opening or closing of the umbrella, a rib assembly pivotally secured to the central shaft device for supporting an umbrella cloth on the rib assembly, an extending spring retained within the central shaft device for extending the shaft and the umbrella when opening the umbrella, and a plurality of retraction restoring springs secured on the rib assembly for retracting the rib assembly for closing the umbrella, in which the extending spring is jacketed on an upper sleeve fixed in the upper tubular shaft and jacketed in a middle sleeve secured on the middle tubular shaft of the central shaft device so as to prevent any frictional contacting of the coiled extending spring with an inside wall of the central shaft device for noise prevention and for a smooth opening and closing operation of the umbrella having multiple folds.
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