Auto-adjusting finger insert for bowling balls

Abstract

A bowling ball finger insert featuring a pliable plastic cylinder and three vertically disposed ridges whose respective faces define the interface between the insert and a finger hole of a bowling ball.

1 . A bowling ball finger insert comprising: 
 (a) a pliable plastic cylinder; and    (b) a plurality of ridges formed on the outer surface of said cylinder and spaced apart from one another, the ridges defining the interface between a hole of a bowling ball and the insert.    
   
   
       2 . The insert of  claim 1  wherein said plurality of ridges comprise three vertical ridges spaced apart from one another.  
   
   
       3 . The insert of  claim 2  wherein centerlines of a first and second of said ridges are spaced apart from a centerline of a third of said ridges by at least 120 degrees about the circumference of said cylinder.  
   
   
       4 . The insert of  claim 3  wherein a flat surface is formed on an inner surface of said cylinder above said third ridge to receive the underside of a finger.