Golf club head

Abstract

A golf club head is described having a club head portion, a shaft portion connected to the club head portion, and a grip portion connected to the shaft portion. The club head portion has a heel portion, a sole portion, a toe portion, a crown portion, a hosel portion, and a striking face. The striking face has a center face roll contour, a toe side roll contour, a heel side roll contour, a center face bulge contour, a crown side bulge contour, and a sole side bulge contour. The toe side roll contour is more lofted than the center face roll contour. The heel side roll contour is less lofted than the center face roll contour. The crown side bulge contour is more open than the center face bulge contour, and the sole side bulge contour is more closed than the center face bulge contour.

1 . A golf club head comprising:
 a hosel portion, a heel portion, a sole portion, a toe portion, a crown portion, and a striking face;   the hosel comprising an adjustable head-shaft connection capable of adjusting an orientation of the club head relative to a shaft to adjust one or more of a loft angle, lie angle, and face angle of the club head;   the striking face having a center face location;   a center face vertical plane passing through the center face location and extending in a front-rear direction, the center face vertical plane extending from adjacent the crown portion to adjacent the sole portion and intersecting with the striking face surface to define a center face roll contour;   a center face horizontal plane passing through the center face location and extending in a front-rear direction, the center face horizontal plane extending from adjacent the toe portion to adjacent the heel portion and intersecting with the striking face surface to define a center face bulge contour;   the striking face having a toe-crown quadrant defined as a portion of the striking face that is toeward of the center face vertical plane and crownward of the center face horizontal plane; and   wherein the toe-crown quadrant has an average quadrant face angle difference (AQFA° Δ) of between 0.1° and 5.0° relative to the center face location.   
     
     
         2 . The golf club head of  claim 1 , wherein the toe-crown quadrant has an AQFA° Δ of between 0.3° and 3.0° relative to the center face location. 
     
     
         3 . The golf club head of  claim 1 , wherein the toe-crown quadrant has an AQFA° Δ of between 0.3° and 0.5° relative to the center face location. 
     
     
         4 . The golf club head of  claim 1 , wherein the striking face comprises:
 a first point in the toe-crown quadrant located at (−10 mm, 10 mm);   a second point in the toe-crown quadrant located at (−18 mm, 12 mm);   a third point in the toe-crown quadrant located at (−25 mm, 20 mm); and   a fourth point in the toe-crown quadrant located at (−30 mm, 15 mm);   wherein an average face angle difference (FA° Δ) of the first, second, third, and fourth points is between 0.1° and 5° relative to the center face location.   
     
     
         5 . (canceled) 
     
     
         6 . The golf club head of  claim 4 , wherein the average FA° Δ of the first, second, third, and fourth points is between 0.4° and 1.0° relative to the center face location. 
     
     
         7 . The golf club head of  claim 1 , wherein an average loft angle difference (LA° Δ) of the toe-crown quadrant is between 0.4° and 0.8° relative to the center face location. 
     
     
         8 . The golf club head of  claim 4 , where an average loft angle difference (LA° Δ) of the first, second, third, and fourth points is between 0.5° and 1.5° relative to the center face location. 
     
     
         9 . The golf club head of  claim 1 , wherein the striking face has a bulge radius between 228.6 mm and 355.6 mm 
     
     
         10 . The golf club head of  claim 1 , wherein the striking face has a bulge radius between 228.6 mm and 330.2 mm 
     
     
         11 . The golf club head of  claim 1 , wherein the striking face has a variable face thickness having an inverted recess in a center portion of a back surface of the striking face. 
     
     
         12 . A golf club comprising:
 a golf club head having a hosel portion, a heel portion, a sole portion, a toe portion, a crown portion, and a striking face;   a golf club shaft;   the hosel comprising an adjustable head-shaft connection capable of adjusting an orientation of the club head relative to the shaft to adjust one or more of a loft angle, lie angle, and face angle of the golf club;   the striking face having a center face location;   a center face vertical plane passing through the center face location and extending in a front-rear direction, the center face vertical plane extending from adjacent the crown portion to adjacent the sole portion and intersecting with the striking face surface to define a center face roll contour;   a center face horizontal plane passing through the center face location and extending in a front-rear direction, the center face horizontal plane extending from adjacent the toe portion to adjacent the heel portion and intersecting with the striking face surface to define a center face bulge contour;   the striking face having a toe-crown quadrant defined as a portion of the striking face that is toeward of the center face vertical plane and crownward of the center face horizontal plane; and   wherein the toe-crown quadrant has an average quadrant face angle difference (AQFA° Δ) of between 0.1° and 5.0° relative to the center face location.   
     
     
         13 . The golf club of  claim 12 , wherein the toe-crown quadrant has an AQFA° Δ of between 0.3° and 3.0° relative to the center face location. 
     
     
         14 . The golf club of  claim 12 , wherein the toe-crown quadrant has an AQFA° Δ of between 0.3° and 0.5° relative to the center face location. 
     
     
         15 . The golf club of  claim 12 , wherein the striking face comprises:
 a first point in the toe-crown quadrant located at (−10 mm, 10 mm);   a second point in the toe-crown quadrant located at (−18 mm, 12 mm);   a third point in the toe-crown quadrant located at (−25 mm, 20 mm); and   a fourth point in the toe-crown quadrant located at (−30 mm, 15 mm);   wherein an average FA° Δ of the first, second, third, and fourth points is between 0.1° and 5° relative to the center face location.   
     
     
         16 . The golf club of  claim 15 , wherein the average FA° Δ of the first, second, third, and fourth points is between 0.3° and 0.5° relative to the center face location. 
     
     
         17 . The golf club of  claim 12 , wherein an average loft angle difference (LA° Δ) of the toe-crown quadrant is between 0.4° and 0.8° relative to the center face location. 
     
     
         18 . The golf club of  claim 12 , wherein the striking face has a bulge radius between 228.6 mm and 355.6 mm 
     
     
         19 . The golf club of  claim 12 , wherein the striking face has a bulge radius between 228.6 mm and 330.2 mm 
     
     
         20 . A golf club head comprising:
 a hosel portion, a heel portion, a sole portion, a toe portion, a crown portion, and a striking face;   the striking face having a center face location;   a center face vertical plane passing through the center face location and extending in a front-rear direction, the center face vertical plane extending from adjacent the crown portion to adjacent the sole portion and intersecting with the striking face surface to define a center face roll contour;   a center face horizontal plane passing through the center face location and extending in a front-rear direction, the center face horizontal plane extending from adjacent the toe portion to adjacent the heel portion and intersecting with the striking face surface to define a center face bulge contour;   the striking face having a toe-crown quadrant defined as a portion of the striking face that is toeward of the center face vertical plane and crownward of the center face horizontal plane;   wherein the striking face comprises:
 a first point in the toe-crown quadrant located at (−10 mm, 10 mm); 
 a second point in the toe-crown quadrant located at (−18 mm, 12 mm); 
 a third point in the toe-crown quadrant located at (−25 mm, 20 mm); and 
 a fourth point in the toe-crown quadrant located at (−30 mm, 15 mm); 
   wherein an average face angle difference (FA° Δ) of the first, second, third, and fourth points in the toe-crown quadrant is between 0.3° and 0.5° relative to the center face location.   
     
     
         21 . The golf club head of  claim 20 , wherein an average loft angle difference (LA° Δ) of the first, second, third, and fourth points in the toe-crown quadrant is between 0.4° and 0.8° relative to the center face location.