Patent ID: 8684859

Claim:
An adjustable golf club head comprising: a face; a sole; a crown; a shaft sleeve having a shaft sleeve axis and a shaft-receiving bore, the shaft receiving bore having a bore axis that is coaxial with the shaft sleeve axis; a hosel having a hosel bore extending from the sole to the crown, at least part of the hosel bore having a diameter sized to receive at least a part of the shaft sleeve; a first tubular adjustment piece having non-parallel upper and lower surfaces; a flange within the hosel bore, wherein the flange comprises a convex tower surface; and a fastener comprising a fastener head and a threaded body, wherein the first tubular adjustment piece fits around a section of the shaft sleeve when at least a part of the shaft sleeve is inserted within the hosel bore, wherein rotating the first tubular adjustment piece around the shaft sleeve changes the angle of the shaft sleeve with respect to the face, wherein the first tubular adjustment piece provides a plurality of angular adjustments, wherein the shaft sleeve does not rotate around the bore axis more than 5 degrees for all of the plurality of angular adjustments, wherein the fastener is inserted into the hosel bore through the sole, wherein the threaded body engages the shaft sleeve to connect the shaft sleeve to the head, wherein the fastener head abuts the convex lower surface of the flange when the threaded body is fully engaged with the shaft sleeve, wherein the shaft sleeve further comprises a universal joint connection having a joint bore sized to securely receive the threaded body of the fastener, wherein the universal joint connection protrudes from a lower portion of the shaft sleeve, and wherein the universal joint connection comprises at least two planar sides and at least two curved sides.