Three-piece umbrella cover structure

Abstract

A three-piece umbrella cover structure having main rectangular cloth and two side-cloths is provided for use with an umbrella having a plurality of umbrella ribs. The main rectangular cloth has two stitch sides and four vertexes. Each side-cloth has one stitch side and a plurality of raised points corresponding to the stitch side. The stitch side has two ends, each having an indent defined therein. The stitch sides of the side cloths are combined with the stitch sides of the main cloth, respectively, wherein the indents are combined with the stitch sides of the main cloth to form indent seaming portions to provide pulling force for stretching the main rectangular cloth.

What is claimed is:  
     
         1 . A three-piece umbrella cover structure for use with an umbrella having a plurality of umbrella ribs, comprising: 
 a main rectangular cloth having two stitch sides and four vertexes; and    two side-cloths, each having one stitch side and a plurality of raised points corresponding to the stitch side, the stitch side having two ends, each having an indent defined therein, the stitch sides of the side cloths being combined with the stitch sides of the main cloth, respectively, wherein the vertexes of the main cloth and the raised points of the side-cloths fix the ribs in specific positions and the indents are combined with the stitch sides of the main cloth to form indent seaming portions to provide pulling force for stretching the main rectangular cloth.    
     
     
         2 . The three-piece umbrella cover structure as claimed in  claim 1 , wherein the main rectangular cloth is a rectangle and the stitch sides are the long sides of the rectangle.  
     
     
         3 . The three-piece umbrella cover structure as claimed in  claim 1 , wherein the main rectangular cloth is a square and the stitch sides are any two opposite sides of the square.  
     
     
         4 . The three-piece umbrella cover structure as claimed in  claim 1 , wherein the number of ribs is even and equal or greater than eight.  
     
     
         5 . The three-piece umbrella cover structure as claimed in  claim 1 , wherein the stitch side of the side-cloth is a smooth curve.  
     
     
         6 . The three-piece umbrella cover structure as claimed in  claim 1 , wherein the stitch side of the side cloth is segment-shaped.