Pitching training tool

Abstract

A pitching training tool includes: a hollow ball; a shaft; and a wing. The shaft has one end attached to the ball, and another end attached to the wing. The ball and the wing are spaced apart from each other by a length equal to or greater than a sum of a diameter of the ball and a length of the wing with the shaft interposed between the ball and the wing.

1 . A pitching training tool comprising:
 a hollow ball;   a shaft; and   a wing,
 the shaft having one end attached to the ball, and another end attached to the wing, 
 the ball and the wing being spaced apart from each other by a length equal to or greater than a sum of a diameter of the ball and a length of the wing with the shaft interposed between the ball and the wing, and 
 the shaft being formed in a straight line over its entire length, the one end of the shaft penetrating the ball and being attached to poles that are two ends of the diameter of the ball. 
   
     
     
         2 . The pitching training tool of  claim 1 , wherein:
 the ball has a surface with a through-hole penetrating the surface to the hollow of the ball.   
     
     
         3 . The pitching training tool of  claim 1 , wherein:
 the shaft has a length greater than the sum of the diameter of the ball and the length of the wing.   
     
     
         4 . The pitching training tool of  claim 1 , wherein:
 the length of the shaft falls within a range from 30 cm to 60 cm.   
     
     
         5 . A pitching training tool comprising:
 a hollow ball;   a shaft; and   a wing,
 the shaft having one end attached to the ball, and another end attached to the wing, 
 the shaft has a length within a range from 30 cm to 60 cm, and 
 the shaft being formed in a straight line over its entire length, the one end of the shaft penetrating the ball and being attached to poles that are two ends of the diameter of the ball. 
   
     
     
         6 . (canceled) 
     
     
         7 . The pitching training tool of  claim 2 :
 the length of the shaft falls within a range from 30 cm to 60 cm.   
     
     
         8 . The pitching training tool of  claim 3 :
 the length of the shaft falls within a range from 30 cm to 60 cm.   
     
     
         9 . The pitching training tool of  claim 2 , wherein:
 the shaft has a length greater than the sum of the diameter of the ball and the length of the wing.   
     
     
         10 . The pitching training tool of  claim 9 :
 the length of the shaft falls within a range from 30 cm to 60 cm.