Patent ID: 6062242
Filing Date: 2000-05-16
Classification: A45B

Abstract:
An improved umbrella frame comprising a stick having a handle installed on a bottom end thereof, a cap set on a top end thereof, an upper sleeve which has an upper nest on a topside thereof and installed on the stick beneath the cap, a mid runner and a lower runner installed on the stick beneath the upper sleeve and a spring installed between the mid and lower runners, a plurality of long ribs which are radiated around the upper nest and one end of which is pivotally connected thereto, a plurality of short ribs which are radiated around the mid runner and have a first end pivotally connected thereto, and a second end pivotally connected to the long ribs, a plurality of stretchers radiated around the lower runner and each have a first end pivotally connected thereto, and a second end pivotally connected to one of the short ribs, wherein the improvement comprising:the short ribs are made of fiber material and are formed in a solid rectangular shape with two lateral edges each with a height greater than a width of a top and a bottom edge, wherein a pivot hole is defined on the short rib with a sleeve riveted therethrough for pivotally jointing with the stretcher.