Bowling ball including removable finger grip insert
OwnerRobert Seylerinventor
Life of this patent
Estimating the term…
Abstract
A removable interchangeable thumb or finger grip insert for the thumb or finger hole of a bowling ball. The insert is generally cylindrical and hollow and is formed with a slotted resilient hollow bottom axial internally and externally threaded stud for threadedly engaging in the bottom of the bowling ball hole. A tapered adjustable wedging screw is engaged in the hollow stud for expanding it to tightly grip the bowling ball. The screw has a square bore engageable by a correspondingly-shaped L-shaped square tool bar. A spanner wrench tool is provided, the bottom of the wrench tool having a pair of spaced depending pins engageable in holes provided in the bottom of the insert for rotating same.
Claims10
A bowling ball comprising a solid spherical body having a substantially cylindrical finger bore extending therein from the spherical surface of said body, the bottom of said bore having a central tapped hole, a substantially cylindrical hollow insert closely fitting in said finger bore and having a hollow expansible reduced axial bottom stud threadedly engaged in said central tapped hole, and a screw plug member having an externally threaded downwardly tapering lower portion threadedly engaging in said bottom stud so as to expand said stud responsive to rotation of the screw plug member and removably lock the insert in said finger bore.
Dependencies are inferred from the claim text.