Patent ID: 6502592
Filing Date: 2003-01-07
Classification: A45B

Abstract:
An umbrella structure for releasing wind comprising:a shaft having a notch and a runner around the shaft; a main rib having an inner end connected to the notch and an outer end extending outwardly; a branch rib having an inner end connected to the runner and an outer end pivotally connected to a middle portion of the main rib; a supporting rib having an inner end pivotally connected to the main rib at an upper middle position thereof and a hollow outer end, the supporting rib having an arch-shaped groove formed in a side thereof adjacent the inner end of the supporting rib; a coil spring disposed within the hollow outer end of the supporting rib; an end ball connected with an outer end of the coil spring; a small pin mounted on the main rib and positioned in the arch-shaped groove to enable the supporting rib to swing through a limited angle range; an upper cover covering a central portion of the umbrella structure and having a perimeter portion thereof connected with the ball of the supporting rib; and, a lower cover having an inner circumscription joined with the main rib at a position where the branch rib is connected with the main rib and having an outer circumscription joined with the outer end of the main rib.