Patent ID: 9387364
Filing Date: 2016-07-12
CPC Classification: A63B

Claim Text:
1. An interchangeable finger insert apparatus for a bowling ball comprising: a cylindrical outer body configured to be disposed in a bowling ball hole, the outer body defining an internal bore open to a first end of the outer body, a base at a second end of the outer body and a plurality of protrusions extending from an inner surface of the bore; a cylindrical inner slug sized to be inserted into the bore of the outer body, the inner slug defining a plurality of helical grooves that correspond to the plurality of protrusions of the outer body, wherein one of the protrusions is uniquely sized relative to other protrusions and corresponds to only one of the helical grooves such that the slug may be rotatably inserted to a single set position; and a compression element attachable to the base wherein the inner slug compresses the compression element when inserted into the bore resulting in a resistive force retaining the inner slug in the set position.