US Patent No: 5,421,354
Number of patents in Portfolio can not be more than 2000
Frameless umbrella and canopy
Stats
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Jun 6, 1995
Issued date -
Jun 28, 1993
filing date -
08/082,746
serial no -
Expired
status
Importance
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Abstract
A self-supporting umbrella canopy has a high strength-to-weight ratio and the ability to compactly fold flat. The umbrella canopy uses a series of collapsible, closed cross-section cells to provide its support and to provide weather protection for a person or persons below. The closed cross-section cells are attached to each other in series so that the umbrella canopy may conveniently unfurl in a radial manner. Construction of the umbrella canopy lends itself to automated processes. Due to the self-supporting nature of the collapsible, closed cross-section cells, lightweight and inexpensive waterproof materials may be used to construct the umbrella canopy.
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First Claim
Related Publications
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,934,434 Suspension and actuation systems for specialty window shades | 19 | 1989 | |
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| 4,370,993 Disposable umbrella | 4 | 1981 | |
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| 5,043,039 Method of manufacture of expandable and collapsible cellular shades of sheer fabric | 25 | 1990 | |
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| 5,197,526 Device for the internal shading of glass areas with a hanging means | 16 | 1990 | |
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| 5,188,160 Honeycombed shade | 15 | 1992 | |
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| 5,078,195 Double-walled pleated curtain | 14 | 1990 | |
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| 4,182,352 Foldable paperboard umbrella | 3 | 1978 | |
| 4,643,210 Inflatable umbrella | 12 | 1985 | |
| 4,870,983 Inflating article with integrally associated pump | 9 | 1988 | |
| 5,103,848 Sunshade umbrella | 5 | 1990 | |