Golf club heads with golf coupling mechanisms

Abstract

Embodiments of golf coupling mechanisms for joining golf club heads and shafts are described herein. The golf coupling mechanism allows for adjustment of a club head loft angle, a club head lie angle, and a golf club shaft length while utilizing one club head and one shaft. In a fully extended configuration, the golf coupling mechanism includes a shaft sleeve, a removable spacer, and a removable extender, wherein a fastening assembly secures the golf coupling mechanism to the golf club head. In a contracted configuration, the golf coupling mechanism includes the shaft sleeve. The golf coupling mechanism further includes a shaft cap to soften the interaction between the shaft and the golf coupling mechanism. The golf coupling mechanism further comprises one or more arcuate coupler sets to frictionally lock the shaft relative to the golf club head.

1 . A golf coupling mechanism configured for joining an iron-type club head and a golf club shaft, the golf coupling mechanism comprising:
 a shaft sleeve having a sleeve bore configured to receive an end of the golf club shaft; the shaft sleeve comprising a top section and a bottom section;   a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the top section; the sleeve coupler set comprising:
 a first coupler having an arcuate surface curved throughout the first coupler; 
 a second coupler having an arcuate surface curved throughout the second coupler; 
 a third coupler having an arcuate surface curved throughout the third coupler; and 
 a fourth coupler having an arcuate surface curved throughout the fourth coupler; 
   a shaft cap configured to be inserted into the sleeve bore;   a removable spacer configured to couple with the top section of the shaft sleeve; and   a removable extender comprising a threaded post configured to couple with the bottom section of the shaft sleeve.   
     
     
         2 . The golf coupling mechanism of  claim 1 , wherein the sleeve coupler set of the shaft sleeve further comprises:
 a fifth coupler having an arcuate surface curved throughout the fifth coupler; and   a sixth coupler having an arcuate surface curved throughout the sixth coupler.   
     
     
         3 . The golf coupling mechanism of  claim 1 , wherein:
 the removable spacer further comprises a receiver coupler set having a plurality of receiver couplers; and   the sleeve coupler set of the shaft sleeve is configured to sit against the receiver coupler set of the removable spacer to restrict rotation of the shaft sleeve relative to the removable spacer.   
     
     
         4 . The golf coupling mechanism of  claim 1 , wherein the removable spacer further comprises a spacer coupler set protruding from an outer surface of the removable spacer. 
     
     
         5 . The golf coupling mechanism of  claim 1 , wherein the shaft cap comprises a plurality of protrusions protruding from an internal surface of the shaft cap and configured to center the golf club shaft within the shaft sleeve of the golf coupling mechanism. 
     
     
         6 . The golf coupling mechanism of  claim 1 , wherein the shaft cap is configured to elastically compress to be secured within the shaft sleeve. 
     
     
         7 . The golf coupling mechanism of  claim 1 , wherein the sleeve coupler set can be asymmetric about an outer surface of the shaft sleeve such that one or more sleeve couplers are longer in length at a first area of the shaft sleeve than a second area of the shaft sleeve. 
     
     
         8 . The golf coupling mechanism of  claim 1 , wherein the removable spacer and the removable extender are formed from aluminum alloy. 
     
     
         9 . The golf coupling mechanism of  claim 1 , wherein the shaft sleeve further comprises locking channels located at the bottom section of the shaft sleeve. 
     
     
         10 . The golf coupling mechanism of  claim 9 , wherein:
 the removable extender comprises a first engagement member and a second engagement member; and   the first and second engagement members of the removable extender are configured to couple with the locking channels of the shaft sleeve to restrict rotation of the removable extender relative to the shaft sleeve.   
     
     
         11 . A golf club, comprising:
 a golf club shaft;   an iron-type club head comprising a hosel having a hosel bore extending along a hosel bore axis; and   a golf coupling mechanism for insertion into the hosel bore thereby to couple the golf club shaft to the iron-type club head;
 the golf coupling mechanism comprising:
 a shaft sleeve having a sleeve bore configured to receive an end of the golf club shaft, the shaft sleeve comprising:
 a top section; 
 a bottom section; 
 a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the top section; and 
 a sleeve axis extending along a centerline of the sleeve bore; 
 
 a shaft cap configured to be inserted into the sleeve bore; 
 a removable spacer configured to couple with the top section of the shaft sleeve; and 
 a removable extender configured to couple with the bottom section of the shaft sleeve; 
 
 wherein:
 the removable spacer is located exterior to the hosel and comprises an external diameter that is greater than an internal diameter of the hosel bore; 
 the removable extender is completely disposed within the hosel bore and comprises an external diameter that is less than the internal diameter of the hosel bore; 
 the sleeve axis is angled with respect to the hosel bore axis such that the sleeve bore is non-concentric with the hosel bore; 
 the golf coupling mechanism is configured to be rotated within the hosel to change a loft angle and a lie angle of the iron-type club head; and 
 the golf coupling mechanism is configured to change a length of the golf club shaft. 
 
   
     
     
         12 . The golf club of  claim 11 , wherein:
 the removable spacer further comprises a receiver coupler set having a plurality of receiver couplers; and   the sleeve coupler set of the shaft sleeve is configured to sit against the receiver coupler set of the removable spacer to restrict the rotation of the shaft sleeve relative to the removable spacer.   
     
     
         13 . The golf club of  claim 11 , wherein the removable spacer further comprises a spacer coupler set having a plurality of spacer couplers protruding from an outer surface of the removable spacer. 
     
     
         14 . The golf club of  claim 13 , wherein:
 the hosel bore comprises a receiver coupler set having a plurality of receiver couplers indented into an internal surface of the hosel; and   the removable spacer is configured to sit against the receiver coupler set of the hosel bore to restrict rotation of the golf coupling mechanism relative to the iron-type club head.   
     
     
         15 . The golf club of  claim 11 , wherein the removable extender comprises a threaded post configured for insertion into the shaft sleeve, thereby to couple the removable extender and the shaft sleeve. 
     
     
         16 . The golf club of  claim 11 , wherein the shaft sleeve further comprises locking channels located at the bottom section of the shaft sleeve. 
     
     
         17 . The golf club of  claim 16 , wherein:
 the removable extender comprises a first engagement member and a second engagement member; and   the first and second engagement members of the removable extender are configured to couple with the locking channels of the shaft sleeve to restrict rotation of the removable extender relative to the shaft sleeve.