Adjustable golf club shaft and hosel assembly
View Patent ↗An adjustable shaft and hosel assembly allows for dependent and independent adjustment of a golf club's face angle, loft angle, and lie angle. The adjustable shaft and hosel assembly comprises a shaft sleeve with a joint portion, a hosel portion, and a fitting piece, wherein the joint portion fits within the fitting piece and the fitting piece fits within the hosel portion.
1. An adjustable golf club head comprising:
a body comprising a face, a sole, and a crown;
a shaft sleeve comprising a shaft-receiving bore and a joint connection, wherein the joint connection protrudes from a lower surface of the shaft sleeve and comprises two joint connection pins and a fastener bore;
a hosel comprising a plurality of side notches and a hosel bore extending from the sole to the crown;
a fitting member sized to fit within the hosel bore proximate the crown, wherein the fitting member comprises a fitting member bore, a plurality of fitting member notches, and two fitting member pins;
a flange disposed within the hosel bore and comprising a convex lower surface;
a first washer; and
a fastener comprising a fastener head and a threaded body,
wherein the joint connection fits within the fitting member bore such that the joint connection pins rest within the fitting member notches;
wherein the fitting member fits within the hosel bore such that the fitting member pins rest within the side notches, and
wherein the fitting member can move within the hosel bore along a first axis,
wherein the joint connection can move within the fitting member bore along a second axis,
wherein the first axis is perpendicular to the second axis,
wherein moving the shaft sleeve changes the angle of the shaft sleeve with respect to the face,
wherein the fastener is inserted into the hosel bore through the sole,
wherein the threaded body engages the fastener bore to connect the shaft sleeve to the head,
wherein the washer is disposed between the fastener head and the convex lower surface of the flange, and
wherein the washer comprises a concave surface that mates with the convex lower surface of the flange.
2. The adjustable golf club head of claim 1 , further comprising a first tubular adjustment piece having non-parallel upper and lower surfaces;
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, and
wherein the first tubular adjustment piece provides a plurality of angular adjustments.
3. The adjustable golf club head of claim 2 , further comprising a second tubular adjustment piece having non-parallel upper and lower surfaces, wherein the second tubular adjustment piece is disposed proximate the first tubular adjustment piece.
4. The adjustable golf club head of claim 3 , wherein the first and second tubular adjustment pieces each comprise one or more markings on an external surface, and wherein the one or more markings indicate angular adjustments provided by said adjustment pieces.
5. The adjustable golf club head of claim 1 , wherein the washer comprises a flat lower surface that mates with the fastener head.
6. The adjustable golf club head of claim 1 , wherein a radius of the convex lower surface is equivalent to a distance between a rotation point of the shaft sleeve and a point at which the fastener head makes contact with the flange.
7. The adjustable golf club head of claim 1 , wherein a radius of the convex lower surface is 0.1 to 3.0 inches.
8. The adjustable golf club head of claim 1 , wherein the adjustable golf club head is a wood-type golf club head.
9. The adjustable golf club head of claim 8 , wherein the adjustable golf club head is a driver golf club head.
10. The adjustable golf club head of claim 1 , wherein the fitting member notches and the side notches are arcuate.
11. The adjustable golf club head of claim 1 , wherein the two joint connection pins are integrally formed with the shaft sleeve, and wherein the two fitting member pins are integrally formed with the fitting member.
12. The adjustable golf club head of claim 1 , wherein the face, sole, and hosel are composed of a metal material.
13. The adjustable golf club head of claim 12 , wherein the face, sole, and hosel are integrally cast from a titanium alloy.
14. The adjustable golf club head of claim 1 , wherein the crown is composed of a composite material.
15. The adjustable golf club head of claim 1 , wherein the body has a volume no less than 420 cubic centimeters and no more than 480 cubic centimeters.