Flattened and shortened umbrella
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 30, 2003
Grant Date -
Jun 5, 2003
app pub date -
Dec 5, 2001
filing date -
Dec 5, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
An umbrella includes: a flat upper notch formed on a top of a central shaft and a flat lower runner slidably held on the central shaft for pivotally securing a plurality of ribs between the upper notch and the lower runner, either the upper notch or lower runner having four ribs pivotally secured to a narrow right side portion of the upper notch or the lower runner, and having three ribs pivotally secured to a narrow left side portion of the upper notch or the lower runner, thereby decreasing the separating angle between every two opposite ribs disposed on a wide front or rear side portion of the upper notch or the lower runner for smoothening the folding operation when closing the umbrella and also for enhancing the strength of the umbrella ribs.
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