Golf Clubs With Golf Club Heads Having Grooves

Abstract

A golf club with a golf club head having a plurality of grooves formed in a ball striking surface of the golf club head wherein the side walls of each groove slope inwardly from the striking face toward a bottom of the groove at an angle of 25.5 to 27.5 degrees from an axis of symmetry extending perpendicular from the striking face.

What is claimed is: 
     
         1 . A golf club head comprising a substantially flat striking face and a plurality of grooves formed therein,
 wherein at least one of said grooves comprises:
 side walls wherein each side wall slopes inwardly from the striking face toward a bottom of the groove at an angle of 25.5 to 28.5 degrees from an axis of symmetry extending perpendicular from the striking face; 
 a depth extending perpendicular from the striking face to the bottom of the groove of 0.013 to 0.018 inch; and 
 wherein spacing between adjacent groove edges is 0.085 to 0.098 inches. 
   
     
     
         2 . The golf club head of  claim 1  wherein the angle is 26.5 to 27.5. 
     
     
         3 . The golf club head of  claim 1  wherein the depth is 0.015 inches to 0.017 inches. 
     
     
         4 . The golf club head of  claim 1  wherein the spacing is 0.090 to 0.095 inches. 
     
     
         5 . The golf club head of  claim 1  wherein the area of each of said grooves divided by groove pitch is 0.0018 to 0.0030 in 2 /in. 
     
     
         6 . The golf club head of  claim 1  wherein the area of each of said grooves divided by groove pitch is 0.0023 to 0.0030 in 2 /in. 
     
     
         7 . The golf club head of  claim 1  wherein a groove area (A) is 0.00028 to 0.00036 in 2 . 
     
     
         8 . The golf club head of  claim 1  wherein the grooves comply with the USGA  Rules of Golf  dated 2011-2012. 
     
     
         9 . A golf club head comprising a substantially flat striking face and a plurality of grooves formed therein,
 wherein at least one of said grooves comprises:
 side walls wherein each side wall slopes inwardly from the striking face toward a bottom of the groove at an angle of 25.5 to 28.5 from an axis of symmetry extending perpendicular from the striking face; 
 a depth extending perpendicular from the striking face to the bottom of the groove of 0.013 to 0.018 inch; and 
 a width at the top of the groove of 0.025 to 0.030 inches. 
   
     
     
         10 . The golf club head of  claim 9  wherein the angle is 26.5 to 27.5. 
     
     
         11 . The golf club head of  claim 9  wherein the depth is 0.015 inches to 0.017 inches. 
     
     
         12 . The golf club head of  claim 9  wherein the area of each of said grooves divided by groove pitch is 0.0018 to 0.0030 in 2 /in. 
     
     
         13 . The golf club head of  claim 9  wherein the area of each of said grooves divided by groove pitch is 0.0023 to 0.0030 in 2 /in. 
     
     
         14 . The golf club of  claim 9  wherein a groove area (A) is 0.00028 to 0.00036 in 2    
     
     
         15 . The golf club head of  claim 9  wherein the grooves comply with the USGA  Rules of Golf  dated 2011-2012. 
     
     
         16 . A golf club head comprising a substantially flat striking face and a plurality of grooves formed therein,
 wherein at least one of said grooves comprises:
 side walls wherein each side wall slopes inwardly from the striking face toward a bottom of the groove at an angle of 25.5 to 28.5 from an axis of symmetry extending perpendicular from the striking face; and 
 a width at the top of the groove of 0.025 to 0.030 inches; 
 wherein spacing between adjacent grooves is 0.085 to 0.098 inches. 
   
     
     
         17 . The golf club head of  claim 16  wherein the angle is 26.5 to 27.5. 
     
     
         18 . The golf club head of  claim 16  wherein the spacing is 0.090 to 0.095 inches. 
     
     
         19 . The golf club head of  claim 16  wherein the area of each of said grooves divided by groove pitch is 0.0018 to 0.0030 in 2 /in. 
     
     
         20 . The golf club head of  claim 16  wherein the area of each of said grooves divided by groove pitch is 0.0023 to 0.0030 in 2 /in. 
     
     
         21 . The golf club of  claim 16  wherein a groove area (A) is 0.00028 to 0.00036 in 2    
     
     
         22 . The golf club head of  claim 16  wherein the grooves comply with the USGA  Rules of Golf  dated 2011-2012. 
     
     
         23 . A golf club head comprising a substantially flat striking face and a plurality of grooves formed therein,
 wherein at least one of said grooves comprises:
 side walls wherein each side wall slopes inwardly from the striking face toward a bottom of the groove at an angle of 25.5 to 28.5 degrees from an axis of symmetry extending perpendicular from the striking face; 
 a depth extending perpendicular from the striking face to the bottom of the groove of 0.013 to 0.018 inch; 
 a groove width extending across the top of the groove of 0.025 to 0.030 inch; 
 a groove area is 0.00028 to 0.00036 in 2 ; 
 wherein the area of each of said grooves divided by groove pitch is 0.0018 to 0.0030 in 2 /in; 
   wherein spacing (S) between adjacent grooves is 0.085 to 0.095 inches; and
 the loft angle of the club head is 44° to 70°.