Patent ID: 6318391
Filing Date: 2001-11-20
Classification: A45B

Abstract:
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; anda 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.