Silently smoothly operating automatic umbrella controlled by single push button
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United States of America Patent
Stats
-
Jan 12, 1993
Grant Date -
N/A
app pub date -
Mar 30, 1992
filing date -
Mar 30, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic umbrella includes: a central shaft having a grip formed on a lower portion of the central shaft and a controller formed in the grip for controlling an opening or closing of the umbrella, a rib assembly pivotally secured to the central shaft for supporting an umbrella cloth on the rib assembly, an extending spring retained within the central shaft 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 inner sleeve fixed in an upper tubular shaft of the central shaft so as to prevent any frictional contacting of the coiled extending spring with an inside wall of the central shaft for noise prevention and for a smooth opening and closing operation of the umbrella.
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