Patent ID: 6805143
Filing Date: 2004-10-19
Classification: A45B

Abstract:
A pull cord mechanism for a self-opening foldable umbrella, comprising:a slidably retractable center shaft, with a top and a bottom, having a side slot formed on said top and a cord retainer positioned centrally at said bottom; an upper shaft; a core tube rest with a first sheave and a second sheave both vertically disposed on a first side of said core tube rest so that the first sheave and the second sheave are positioned perpendicular to each other, a bottom end of said core rest connectedly juxtaposed with said core tube, said core tube being connected to said first sheave, with said core tube rest juxtaposedly positioned on top of said slidably retractable center shaft and said first sheave exposed within said side slot of said slidably retractable center shaft; a lower shaft with a third sheave and a fourth sheave installed on said first side, said slidably retractable center shaft slidably inserted in said lower shaft; a string of pull cord with a first cord end and a second cord end, wherein said first cord end is tied to said cord retainer at a bottom of said slidably retractbly center shaft and said second cord end is passed through said core tube, emerges from said slidably retractable center shaft, is wound around said first sheave and then advanced around said third sheave, then up and around said second sheave, back to a fourth sheave, and finally is fixedly secured to said core tube rest or to said upper shaft.