Catch-free automatic closing umbrella as effected by lotus-shape top ribs
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United States of America Patent
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N/A
Issued Date -
Mar 6, 2003
app pub date -
Sep 5, 2001
filing date -
Sep 5, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A catch-free umbrella includes: a central shaft, a rib assembly pivotally secured to the shaft and an umbrella cloth secured on the rib assembly; with the rib assembly having a plurality of top ribs pivotally secured between an upper notch formed on the shaft and a plurality of stretcher ribs pivotally inclinedly secured to a runner slidably held on the shaft; and the top ribs radially arcuately bent to form a lotus-shape arrangement when opening the umbrella to form an upward force fraction acting on the runner for lifting the runner and the rib assembly without gravitational descending; whereby upon closing of the umbrella by initially lowering the runner, the top ribs of lotus-shape arrangement will serve as closing springs for closing the umbrella automatically.
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