Composite ball bat

Abstract

A composite ball bat includes a bat body made of a multilayer fiber composite material and including a hollow barrel, a handle and a tapered section joining the barrel to the handle and having an outer diameter reducing gradually from the barrel toward the handle, and a tube member coaxially mounted in the hollow barrel of the bat body and having a hardness higher than that of the hollow barrel of the bat body. In this way, the composite ball bat of the present invention can use the tube member to improve the hitting effect while reducing the weight.

What is claimed is: 
     
         1 . A composite ball bat, comprising:
 a bat body made of a multilayer fiber composite material, said bat body comprising a hollow barrel, a handle and a tapered section joining said hollow barrel to said handle, the outer diameter of said tapered section reducing gradually from said hollow barrel toward said handle; and   a tube member mounted in said hollow barrel of said bat body, the axis of said tube member being parallel to the axis of said bat body, the hardness of said tube member being higher than that of each layer of said multilayer fiber composite material.   
     
     
         2 . The composite ball bat as claimed in  claim 1 , wherein said multilayer fiber composite material comprises an outer layer, an inner layer and at least one intermediate layer, the thickness of said inner layer being greater than the thickness of each said intermediate layer, the thickness of each said intermediate layer being greater than the thickness of said outer layer. 
     
     
         3 . The composite ball bat as claimed in  claim 1 , further comprising a buffer space defined in said hollow barrel between each adjacent two layers of said multilayer fiber composite material. 
     
     
         4 . The composite ball bat as claimed in  claim 2 , further comprising a buffer space defined in said hollow barrel between each adjacent two layers of said multilayer fiber composite material. 
     
     
         5 . The composite ball bat as claimed in  claim 3 , wherein said buffer spaces have the same width. 
     
     
         6 . The composite ball bat as claimed in  claim 3 , wherein opposing front and back ends of said hollow barrel embed a spacer between each adjacent two layers of said multilayer fiber composite material, so that a buffer space is partitioned by the two said spacers embedded in said front and back ends of said hollow barrel within the adjacent two layers of said multilayer fiber composite material. 
     
     
         7 . The composite ball bat as claimed in  claim 3 , wherein each adjacent two layers of said multilayer fiber composite material beyond said hollow barrel are bonded together. 
     
     
         8 . The composite ball bat as claimed in  claim 4 , wherein said buffer spaces have the same width. 
     
     
         9 . The composite ball bat as claimed in  claim 4 , wherein opposing front and back ends of said hollow barrel embed a spacer between each adjacent two layers of said multilayer fiber composite material, so that a buffer space is partitioned by the two said spacers embedded in said front and back ends of said hollow barrel within the adjacent two layers of said multilayer fiber composite material. 
     
     
         10 . The composite ball bat as claimed in  claim 4 , wherein each adjacent two layers of said multilayer fiber composite material beyond said hollow barrel are bonded together. 
     
     
         11 . The composite ball bat as claimed in  claim 1 , wherein the multiple layers of said multilayer fiber composite material have the same thickness. 
     
     
         12 . The composite ball bat as claimed in  claim 1 , wherein the outer circumferences of said tube member and the inner circumference of said hollow barrel of said bat body are bonded together. 
     
     
         13 . The composite ball bat as claimed in  claim 1 , wherein a gap is left between the outer circumferences of said tube member and the inner circumference of said hollow barrel of said bat body, and the distance of said gap between the outer circumferences of said tube member and the inner circumference of said hollow barrel is 1-5 mm. 
     
     
         14 . The composite ball bat as claimed in  claim 1 , wherein said tube member is made of a fiber composite material. 
     
     
         15 . The composite ball bat as claimed in  claim 1 , wherein said tube member is made of metal.