Core of bowling ball

Abstract

A core of bowling ball includes a rotating disk, a center bearing, a finger hole bar and a plurality of joint pole. The center bearing is disposed on the center of the rotating disk. The finger hole bar is linked to the center bearing. The joint poles are passed through the center bearing and disposed horizontally with the finger hole bar.

I claim: 
     
         1 . A core of bowling ball comprises:
 a rotating disk;   a center bearing, disposed on the center of the rotating disk;   a finger hole bar, linked to the center bearing; and   a plurality of joint pole passed through the center bearing and disposed horizontally with the finger hole bar.   
     
     
         2 . The core of bowling ball of  claim 1 , wherein, the core of bowling ball is covered in the ball and one end of finger hole bar is flushed with surface of ball. 
     
     
         3 . The core of bowling ball of  claim 2 , wherein, the center bearing, and the finger hole bar are disposed on the center axis of the ball. 
     
     
         4 . The core of bowling ball of  claim 2 , wherein, a finger hole of the finger hole bar is disposed on the center axis of the ball. 
     
     
         5 . The core of bowling ball of  claim 2 , wherein, the joint pole is passed through the ball. 
     
     
         6 . The core of bowling ball of  claim 1 , wherein, further comprises a plurality of joint pole bearing disposed between the joint pole and the rotating disk. 
     
     
         7 . The core of bowling ball of  claim 2 , wherein, the rotating disk further comprises a plurality of gasket disposed between the ball and the rotating disk, and the joint pole are passed through the gasket.