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US 6,318,391 B1Granted
Windproof umbrella with multiple canopy and frame
OwnerChing-Chuan Youinventor
Life of this patent
Estimating the term…
Abstract
A windproof umbrella comprises a canopy including an upper canopy, a lower canopy not equal to upper canopy in size, and a vent hole provided in the center portion of the lower canopy; and a multiple frame including a shank, stationary hubs fixed on the shank, rings slidable along the shank, ribs for supporting canopy, and spreaders. Air beneath the lower canopy exits through a gap formed between upper and lower canopies when frame is stretched. Also, rings moves synchronously along the shank such that the stretching and folding of upper and lower canopies can be smooth and synchronous.
Claims8
A windproof umbrella comprising:
- a canopy including an upper canopy and a first lower canopy;
- a vent hole provided in the center portion of the first lower canopy;
- and
- a multiple frame including a shank, a first stationary hub and a second stationary hub below the first stationary hub both fixed on the upper portion of the shank, a first ring and a second ring below the first ring both slidable along the shank, a plurality of first ribs for supporting the upper canopy having one ends attached to the first stationary hub, a plurality of second ribs for supporting the first lower canopy having one ends attached to the second stationary hub, a plurality of first spreaders having one ends attached to the first ring, and a plurality of second spreaders having one ends attached to the second ring;
- wherein air beneath the first lower canopy exits through a gap formed between the upper and the first lower canopies when the multiple frame is stretched;
- and the other open ends of the first ribs, the second ribs, the first spreaders, and the second spreaders are equally spaced around the periphery of the umbrella such that the stretching and the folding of the upper canopy and the first lower canopy are smooth and synchronous.
3 more elements
Dependencies are inferred from the claim text.