Billiard cue

Abstract

The present invention is to provide a billiard cue having an improved shaft. The shaft includes a wooden main shaft, an interior shaft, and an exterior coating. The wooden main shaft has a hollow core with a predetermined length extending along the direction of a longitudinal axis of the main shaft. The interior shaft is made of a material harder than the wooden main shaft and is tightly received in the hollow core of the main shaft. The exterior coating is made of a fiber composite material and is coated on the exterior periphery of the main shaft. Accordingly, the main shaft takes advantages of the wooden material and can prevent curvature and/or deformation by means of the interior shaft and the exterior coating.

What is claimed is:  
     
         1 . A billiard cue comprising a shaft, said shaft comprising: 
 a wooden main shaft having a hollow core with a predetermined length extending along the direction of a longitudinal axis thereof;    an interior shaft made of a material harder than said wooden main shaft and tightly received in said hollow core of said main shaft; and    an exterior coating made of a fiber composite material and being coated on the exterior periphery of said main shaft.    
     
     
         2 . The billiard cue as defined in  claim 1 , wherein said hollow core of said main shaft runs through two ends of said main shaft.  
     
     
         3 . The billiard cue as defined in  claim 1 , wherein said interior shaft is a hollow rod body.  
     
     
         4 . The billiard cue as defined in  claim 1 , wherein said main shaft has a small diametrical end with an outer diameter in between 11 millimeters and 11.4 millimeters, and a large diametrical end with an outer diameter in between 19 millimeters and 19.4 millimeters; 
 wherein said interior shaft has an outer diameter of 6 millimeters substantially;    wherein said exterior coating has a thickness in between 0.8 millimeters and 1 millimeter.    
     
     
         5 . The billiard cue as defined in  claim 3 , wherein said main shaft has a small diametrical end with an outer diameter in between 11 millimeters and 11.4 millimeters, and a large diametrical end with an outer diameter in between 19 millimeters and 19.4 millimeters; 
 wherein said interior shaft has an outer diameter of 6 millimeters substantially;    wherein said exterior coating has a thickness in between 0.8 millimeters and 1 millimeter.