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 a core material mounted in the hollow barrel of the bat body. The core material includes a rod member longitudinally set in parallel to the axial direction of the bat body, a plurality of rings attached onto the rod member and arranged along the axial direction of the rod member at equal intervals, and a plurality of elastic bands wrapped around the outer periphery of the rings within the inner peripheral surface of the hollow barrel in a one-to-one manner. In this way, the composite bat of the invention can use the core material to increase the structural strength, improve the hitting effect.

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 core material mounted in said hollow barrel of said bat body, said core material comprising a rod member, a plurality of rings and a plurality of elastic bands, the axial direction of said rod member being parallel to the axial direction of said bat body, said rings being attached onto said rod member and spaced along the axial direction of said rod member, said elastic bands being wrapped around the outer periphery of said rings in a one-to-one manner.   
     
     
         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 said rings are arranged along the axial direction of said rod member at equal intervals. 
     
     
         12 . The composite ball bat as claimed in  claim 1 , wherein the multiple layers of said multilayer fiber composite material have the same thickness. 
     
     
         13 . The composite ball bat as claimed in  claim 1 , wherein said core material is made of a fiber composite material. 
     
     
         14 . The composite ball bat as claimed in  claim 1 , wherein said core material is made of a plastic material. 
     
     
         15 . The composite ball bat as claimed in  claim 1 , wherein the outer peripheral surface of said elastic bands are abutted on the inner peripheral surface of said hollow barrel of said bat body. 
     
     
         16 . The composite ball bat as claimed in  claim 1 , wherein the outer peripheral surface of said elastic bands is spaced from the inner peripheral surface of said hollow barrel of said bat body by a gap about 1-5 mm.