Laminated sport bat with internal chamber

Abstract

Sport bat 10 , made of laminated wood 50, such as of bamboo 51. Bat 10 includes handle 45 , taper portion 44 and batting portion 30. Batting portion 30 includes one or more internal chambers 31 for decreasing the weight of bat 10. Internal chambers 31 may be reinforced with sleeve insert 32, rubbery coating 34, or porous filler 33. Internal chamber 31 is disposed between taper portion 44 and sweet spot 12.

I claim:  
     
         1 . A sport bat having a longitudinal axis and a sweet spot, including: 
 a body, including 
 a handle;  
 a taper portion attached above said handle, and  
 a batting portion attached above said taper portion, including: 
 an internal chamber that decreases the weight of said sport bat; including: 
 an internal space, and  
 a wall surrounding said internal space; including:  
  a bottom end disposed above said taper portion; and  
  a top end disposed below said sweet spot.  
 
 
   
     
     
         2 . The sport bat of  claim 1 , said internal chamber including: 
 a sleeve insert in contact with said wall for reinforcing said internal chamber.    
     
     
         3 . The sport bat of  claim 1 , said internal chamber including: 
 a shock absorbing coating on said wall    
     
     
         4 . The sport bat of  claim 1 , said internal chamber including: 
 a porous filler.    
     
     
         5 . The sport bat of  claim 1 , said body being fabricated from laminated wood  
     
     
         6 . The sport bat of  claim 5 , the laminated wood being strips of bamboo attached together with adhesive.  
     
     
         7 . The sport bat of  claim 1 , said batting portion including a plurality of chambers disposed between said taper portion and said sweet spot  
     
     
         8 . The sport bat of  claim 2 , said sleeve insert being made from metal, graphite, or plastic.  
     
     
         9 . A baseball bat having a longitudinal axis and a sweet spot, including 
 a body, including: 
 a handle;  
 a taper portion attached above said handle; and  
 a batting portion attached above said taper portion; including. 
 an internal chamber that decreases the weight of said baseball bat, including: 
 an internal space; and  
 a wall surrounding said internal space, including:  
  a bottom end disposed above said taper portion; and  
  a top end disposed below said sweet spot, and  
 
 a distal end opposite said taper portion.  
 
   
     
     
         10 . The baseball bat of  claim 9 , said body being fabricated from laminated wood.  
     
     
         11 . The baseball bat of  claim 10 , the laminated wood being strips of bamboo attached together with adhesive.  
     
     
         12 . The baseball bat of  claim 11 , said top end disposed at least five inches from said distal end  
     
     
         13 . The baseball bat of  claim 11 , said internal chamber including: 
 a sleeve insert in contact with said wall for reinforcing said internal chamber.    
     
     
         14 . The baseball bat of  claim 11 , said internal chamber including: 
 a shock absorbing coating on said wall.    
     
     
         15 . The baseball bat of  claim 11 , said internal chamber including: 
 a porous filler.    
     
     
         16 . The baseball bat of  claim 11 , said batting portion including a plurality of internal chambers.  
     
     
         17 . The baseball bat of  claim 11 , said internal space having a total volume in the range of 2 to 6 cubic inch