Interchangeable bowling finger insert apparatus

摘要

An interchangeable finger insert apparatus for a bowling ball includes a cylindrical outer body configured to be disposed in a bowling ball hole. The outer body defines an internal bore open to a first end of the outer body and a number of protrusions extending from an inner surface of the bore. The finger insert apparatus also includes a cylindrical inner slug sized to be inserted into the bore of the outer body. The inner slug defines a plurality of helical grooves corresponding to the protrusions of the outer body. At least 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.

主权项

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.