Multiple-fold umbrella rib assembly having inner ribs of aluminum alloy and outer ribs of carbon-fiber-reinforced plastics
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Dec 24, 2002
Grant Date -
N/A
app pub date -
Nov 13, 2000
filing date -
Sep 25, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An umbrella rib assembly includes a top rib pivotally connected with a stretcher rib both being made of aluminum alloy for light weight and easy processing; a middle rib pivotally secured to the stretcher rib and a tail rib pivotally connected with the middle rib, with the middle rib and the tail rib being made of light weight carbon-fiber-reinforced plastics.
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