Golf club head with low hosel bore

Abstract

Described herein is an iron-type golf club head comprising a shortened hosel and lengthened hosel bore. The iron-type golf club head allows for a range of loft and lie adjustability post-manufacture with maintained or reduced visible surface deformation and durability loss, and also creates discretionary mass that can be placed strategically for performance benefits.

1 . A golf club head comprising:
 a club body having a top opposite a sole, a toe opposite a heel;   a hosel coupled to the club body and having a first end proximate the heel and a second end opposite the first end;   a hosel bore defined at least partially by the hosel and at least partially by the club body;   wherein;
 the hosel bore defines a hosel bore volume; 
 a midline axis is defined as parallel to a ground plane across a geometric center of the body; 
 an upper portion of the hosel bore is located above the midline axis and a lower portion of the hosel bore is located below the midline axis, and; 
 at least 8% of the hosel bore volume is located below the midline axis. 
   
     
     
         2 . The golf club head of  claim 1 , wherein at least 10% of the hosel bore volume is located below the midline axis. 
     
     
         3 . The golf club head of  claim 1 , wherein the club head body further comprises a strike surface of the club face, a geometric center, and a center of gravity, the geometric center being located at a geometric center point of the club body and at a midpoint of a height of the strike surface, and the center of gravity is positioned along a y-axis extending between the top and the sole. 
     
     
         4 . The golf club head of  claim 3 , wherein the center of gravity along the y-axis is located approximately 0.10 inches to approximately 0.75 inches from the geometric center. 
     
     
         5 . The golf club head of  claim 1 , wherein a hosel length defined between the first end of the hosel and the second end of the hosel ranges inclusively between 1.0 and 1.75 inches. 
     
     
         6 . The golf club head of  claim 1 , wherein a hosel bore length defined between a hosel bore first end within the club body and a hosel bore second end at the second end of the hosel ranges inclusively between 1.0 and 2.2 inches. 
     
     
         7 . The golf club head of  claim 1 , wherein a ratio of a hosel bore volume above the midline axis to a hosel bore volume below the midline axis is approximately 1.5:0.025 to 1.5:0.25. 
     
     
         8 . The golf club head of  claim 1 , wherein a wall thickness of the hosel decreases from the hosel first end to the hosel second end. 
     
     
         9 . The golf club head of  claim 1 , wherein the hosel has a first zone positioned adjacent to the first end with a first wall thickness, and a second zone positioned adjacent to the second end with a second wall thickness that is smaller than the first wall thickness. 
     
     
         10 . The golf club head of  claim 9 , wherein the hosel has a third zone positioned between the first zone and the second zone, the third zone including a third wall thickness that is smaller than the first wall thickness and greater than the second wall thickness. 
     
     
         11 . The golf club head of  claim 9 , wherein the first wall thickness is tapered outwardly in a direction from the first end to second end. 
     
     
         12 . A golf club head comprising:
 a club body having a top opposite a sole, a toe end opposite a heel end, and a club face opposite a back end;   a hosel having a first end coupled to the club body, a second end opposite the first end, and a hosel length defined between the first end and the second end; and   a hosel bore defined partially in the hosel and partially in the club body, and having a hosel bore length that is greater than the hosel length.   
     
     
         13 . The golf club head of  claim 12 , further comprising a strike surface of the club face, a geometric center, and a center of gravity, the geometric center being located at a geometric center point of the club body and at a midpoint of a height of the strike surface, and the center of gravity is positioned along a y-axis extending between the top and the sole. 
     
     
         14 . The golf club head of  claim 13 , wherein the center of gravity along the y-axis is located approximately 0.10 inches to approximately 0.75 inches, as measured from the geometric center. 
     
     
         15 . The golf club head of  claim 12 , wherein a hosel length ranges inclusively between 1.0 and 1.75 inches. 
     
     
         16 . The golf club head of  claim 12 , wherein a hosel bore length defined between a hosel bore first end within the club body and a hosel bore second end at the second end of the hosel ranges inclusively between 1.0 and 2.2 inches. 
     
     
         17 . The golf club head of  claim 12 , wherein a wall thickness of the hosel decreases from a first end to a second end. 
     
     
         18 . The golf club head of  claim 16 , wherein the hosel has first zone positioned adjacent to the first end with a first wall thickness, and a second zone positioned adjacent to the second end with a second wall thickness that is smaller than the first wall thickness. 
     
     
         19 . The golf club head of  claim 18 , wherein the hosel has a third zone positioned between the first zone and the second zone, the third zone including a third wall thickness that is smaller than the first wall thickness and greater than the second wall thickness. 
     
     
         20 . The golf club head of  claim 18 , wherein the first wall thickness is tapered outwardly in a direction from the first end to second end.