Golf club head having stress-reducing features
A golf club head with a face stress-reduction structure disposed proximate a rear surface of a striking face is disclosed herein. In particular, the structure is an adjustable tension cable assembly extending from an upper portion of the golf club head, preferably a return section, to a lower portion of the golf club head, preferably a sole portion, approximately parallel with the rear surface of the striking face. The cable assembly comprises a cable portion, a hollow sleeve, and a screw plug.
1. A golf club head comprising:
a body comprising a crown section, a face section, and a sole section; and
at least one assembly comprising a cable having a first diameter, a first connector, and a second connector;
a sleeve comprising a through opening, a sleeve flange at least partially encircling the through opening, and a wall portion at least partially defining a hollow interior and having an exterior surface, an interior surface comprising a first plurality of threads, and at least one slot extending from a terminal edge of the wall; and
a plug comprising an upper surface having a tool engagement portion, a lower surface, and an exterior surface comprising a second plurality of threads sized to engage with the first plurality of threads,
wherein each of the first connector and second connector has a diameter that is greater than the first diameter,
wherein one of the crown section and the sole section comprises a first through-bore at least partially encircled by a retention flange,
wherein the other of the crown section and the sole section comprises a second through-bore comprising a retention structure,
wherein the retention structure comprises at least one strut sized to fit within the at least one slot and an abutment portion suspended within the second through-bore by the at least one strut,
wherein the cable extends through the first through-bore so that the first connector abuts the retention flange,
wherein the cable extends through the through opening of the sleeve so that the second connector is disposed within the hollow interior and abuts the sleeve flange,
wherein the at least one strut is disposed within the at least one slot so that the abutment portion is received within the hollow interior of the sleeve,
wherein the plug is disposed within hollow interior of the sleeve so that the first plurality of threads engages the second plurality of threads and the lower surface abuts the abutment portion,
wherein no portion of the assembly is spaced further than 1.00 inch from an interior surface of the face section along a vertical plane extending perpendicular to the face section, and
wherein no portion of the assembly contacts any portion of the striking face.
2. The golf club head of claim 1 , wherein the sleeve is approximately bell-shaped.
3. The golf club head of claim 1 , wherein the at least one slot comprises first, second, third, and fourth slots, and wherein the retention structure comprises first, second, third, and fourth struts.
4. The golf club head of claim 1 , wherein the first connector is a first ball joint, and wherein the second connector is a second ball joint.
5. The golf club head of claim 4 , wherein the first ball joint is permanently affixed to a first end of the cable, and wherein the second ball joint is permanently affixed to a second end of the cable.
6. The golf club head of claim 4 , wherein the retention flange has a concave curvature.
7. The golf club head of claim 4 , wherein each of the ball joint connectors, the sleeve, and the plug is composed of a metal material selected from the group consisting of steel, titanium alloy, and aluminum alloy.
8. The golf club head of claim 1 , wherein each of the first through-bore and the second through-bore is disposed within 1 inch of the face.
9. The golf club head of claim 1 , wherein the assembly is spaced no further than 0.500 inch from the interior surface of the face section.
10. The golf club head of claim 9 , wherein the assembly is spaced approximately 0.250 inch from the interior surface of the face section.
11. The golf club head of claim 1 , wherein the first and second through-bores are vertically aligned with each other along a vertical plane extending parallel with an internal surface of the face.
12. The golf club head of claim 1 , wherein tightening the plug within the sleeve places the cable in tension, and wherein loosening the plug within the sleeve reduces tension in the cable.
13. The golf club head of claim 1 , wherein the body has a volume of 300 to 500 cubic centimeters.
14. The golf club head of claim 1 , wherein the body is composed of a metal material selected from the group consisting of steel and titanium alloy.