Grooves of golf club heads and methods to manufacture grooves of golf club heads

Abstract

A golf club head including a club face defined by a toe end, a heel end, a top rail and a sole. The golf club head including a plurality of grooves disposed on the club face between the top rail and the sole. Each groove extends between the toe end and the heel end. Depths of the grooves vary in a direction extending between the top rail and the sole and in a direction extending between the heel end and the toe end. Widths of each of the plurality of grooves vary in a direction extending between the heel end and the toe end.

1 . A putter-type golf club head comprising:
 a putter club face defined by a toe end, a heel end, a top rail and a sole;   a plurality of grooves disposed on the putter club face between the top rail and the sole, each groove of the plurality of grooves extending between the toe end and the heel end and comprising a first horizontal wall and a second horizontal wall;   wherein the putter club face is generally planar and extends in a generally vertical orientation at an address position;   wherein each groove of the plurality of grooves is horizontally separated into a toe portion proximal the toe end of the putter club face, a heel portion proximal a heel end of the putter club face, and a center portion between the toe portion and the heel portion;   wherein a distance between the first horizontal wall and the second horizontal wall of each of the plurality of grooves defines a width;   wherein the width of each of the plurality of grooves varies in a direction extending between the heel end and the toe end;   wherein the plurality of grooves are separated by a plurality of land portions;   wherein a width of the land portions varies in a direction extending between the top rail and the sole, or in a direction extending between the heel end and the toe end;   wherein the plurality of grooves further comprise a first vertical edge and a second   vertical edge;   wherein a distance between the first vertical edge and the second vertical edge defines a length;   wherein a depth of a portion of the plurality of grooves is about 0.003 inch;   wherein the putter club face is integral with the putter-type golf club head;   wherein at a center portion of the width of the plurality of grooves ranges between 0.035 inch to 0.037 inch;   wherein lengths of the plurality of grooves are equal;   wherein widths of each of the plurality of land portions increase in a direction from a generally center portion of the putter club face to the toe end; and   wherein widths of each of the plurality of land portions increase in a direction from a generally center portion of the putter club face to the heel end.   
     
     
         2 . The putter-type golf club head of  claim 1 , wherein a depth of each of the plurality of grooves near the first vertical edge and near the second vertical edge is shallower than a depth at the center portion of each of the plurality of grooves. 
     
     
         3 . The putter-type golf club head of  claim 2 , wherein the depth of each of the plurality of grooves varies between 0.003 inch and 0.010 inch. 
     
     
         4 . The putter-type golf club head of  claim 1 , wherein a first land portion between a pair of adjacent grooves has a different width than a second land portion between a pair of adjacent grooves. 
     
     
         5 . The putter-type golf club head of  claim 1 , wherein the putter type club head has a loft angle less than 7 degrees. 
     
     
         6 . A putter-type golf club head comprising:
 a putter club face defined by a toe end, a heel end, a top rail and a sole; and   a plurality of grooves disposed on the putter club face between the top rail and the sole, each groove extending between the toe end and the heel end and comprising a first horizontal wall, a second horizontal wall, a first vertical edge, and a second vertical edge;   wherein the putter club face is generally planar and extends in a generally vertical orientation at an address position;   wherein each groove of the plurality of grooves is horizontally separated into a toe portion proximal the toe end of the putter club face, a heel portion proximal a heel end of the putter club face, and a center portion between the toe portion and the heel portion;   wherein a distance between the first horizontal wall and the second horizontal wall of each of the plurality of grooves defines a width;   wherein the width of each of the plurality of grooves decreases in a direction from a generally center portion of the putter club face to the toe end and to the heel end;   wherein a distance between the first vertical edge and the second vertical edge of each of the plurality of grooves defines a length;   wherein the plurality of grooves are separated by a plurality of land portions;   wherein widths of each of the plurality of land portions increase in a direction from a generally center portion of the putter club face to the toe end and increase in a direction from a generally center portion of the putter club face to the heel end; and   wherein a portion of the width of the plurality of the grooves is equal to 0.035 inch.   
     
     
         7 . The putter-type golf club head of  claim 6 , wherein widths of each of the plurality of land portions increase in a direction from a generally center portion of the putter club face to the toe end and increase in a direction from a generally center portion of the putter club face to the heel end. 
     
     
         8 . The putter-type golf club head of  claim 6 , wherein the plurality of grooves comprises a depth of about 0.003 inch at a point along the length of the of the plurality of grooves. 
     
     
         9 . The putter-type golf club head of  claim 6 , wherein the putter type club head comprises a loft angle of about 1 degree.