Golf club head

Abstract

An iron-type golf club head that includes a rear wall having a variable thickness region. The variable thickness region includes a plurality of recesses formed in an interior surface of the rear wall. A thickness of the rear wall, defined by the recesses, is less than the thickness of the rear wall between the recesses. A body of the golf club head includes a face opening, a toe port, and an internal-weight cavity. The golf club head also includes a strike plate, attached to the body so that the strike plate covers the face opening, and an internal weight, seated in the internal-weight cavity. An internal cavity of the golf club head is configured to receive the filler material through the toe port. A ratio of a minimum rear wall thickness to a minimum face thickness is between 0.15 to 0.65.

1 - 57 . (canceled) 
     
     
         58 . An iron-type golf club head, comprising:
 a body made of a first material having a first density, wherein:
 the body defines a heel portion, a toe portion, at least a part of a sole portion, a top portion, a part of a front portion, and a rear portion of the golf club head; and 
 the body comprises:
 a rear wall at the rear portion of the golf club head, wherein the rear wall comprises a variable thickness region comprising a plurality of recesses formed in an interior surface of the rear wall and a thickness of the rear wall, defined by the recesses, is less than the thickness of the rear wall between the recesses; 
 a face opening at the front portion of the golf club head; 
 a toe port at the toe portion of the golf club head; and 
 an internal-weight cavity; 
 
   a strike plate comprising a strike face and attached to the body so that the strike plate covers the face opening, wherein the strike plate comprises a plurality of grooves parallel to each other;   an internal weight seated in the internal-weight cavity and made of a second material having a second density greater than the first density;   an internal cavity enclosed at least partially by the body, the strike plate, and the internal weight; and   a filler material within the internal cavity and having a density between, and inclusive of, 0.03 grams per cubic centimeter (g/cc) and 0.30 g/cc, wherein the internal cavity is configured to receive the filler material through the toe port;   wherein a ratio of a minimum rear wall thickness to a minimum face thickness is between, and inclusive of, 0.15 and 0.65.   
     
     
         59 . The iron-type golf club head according to  claim 58 , wherein the body further comprises a primary beam coupled to the interior surface of the rear wall and at least a portion of the primary is coupled to the variable thickness region of the rear wall. 
     
     
         60 . The iron-type golf club head according to  claim 59 , wherein the internal-weight cavity is closer to a toe of the golf club head, defined by the toe portion, than a heel of the golf club head, defined by the heel portion, and closer to a sole of the golf club head, defined by the sole portion, than a topline of the golf club head, defined by the top portion. 
     
     
         61 . The iron-type golf club head according to  claim 60 , wherein the internal-weight cavity and the internal weight are elongated in a toe-to-heel direction. 
     
     
         62 . The iron-type golf club head according to  claim 61 , wherein a depth of the internal-weight cavity and a thickness of the internal weight increase in a top-to-sole direction. 
     
     
         63 . The iron-type golf club head according to  claim 60 , wherein the internal-weight cavity and the internal weight are elongated in a top-to-sole direction. 
     
     
         64 . The iron-type golf club head according to  claim 63 , wherein a depth of the internal-weight cavity and a thickness of the internal weight increase in a top-to-sole direction. 
     
     
         65 . The iron-type golf club head according to  claim 63 , wherein:
 the internal weight comprises a filler-injection channel passing entirely through the internal weight from one side of the internal weight to an opposite side of the internal weight;   the filler-injection channel is aligned with the toe port so that the filler material is flowable from the toe port into the filler-injection channel; and   the toe port and the filler-injection channel are angled relative to the plurality of grooves.   
     
     
         66 . The iron-type golf club head according to  claim 65 , wherein:
 the internal-weight cavity comprises a protrusion surrounding the toe port;   the internal weight comprises a notch; and   the protrusion is seated within the notch.   
     
     
         67 . The iron-type golf club head according to  claim 65 , wherein:
 the body further comprises internal walls that define the internal-weight cavity; and   at least one of the internal walls comprises a second filler-injection channel aligned with the filler-injection channel of the internal weight.   
     
     
         68 . The iron-type golf club head according to  claim 58 , wherein the body further comprises:
 internal walls that define the internal-weight cavity; and   a primary beam coupled to the interior surface of the rear wall and comprising a first end, coupled to the at least one of the internal walls of the internal-weight cavity, and a second end, coupled to the variable thickness region of the rear wall.   
     
     
         69 . The iron-type golf club head according to  claim 68 , wherein the primary beam is elongated and extends lengthwise at an angle, relative to the plurality of grooves, in an upward direction away from the toe portion. 
     
     
         70 . The iron-type golf club head according to  claim 68 , further comprising a secondary beam comprising a first end, coupled to the sole portion, and a second end, coupled to the variable thickness region of the rear wall, wherein the secondary beam is heelward of the primary beam. 
     
     
         71 . The iron-type golf club head according to  claim 58 , wherein:
 the plurality of recesses has at least two rows of recesses;   wherein an entirety of any one recess of the plurality of recesses can be located within a circle have a radius between, and inclusive of, 3 millimeters (mm) and 5 mm; and   a thickness of the rear wall within the variable thickness region and between the recesses is between, and inclusive of, 1.1 mm and 1.3 mm.   
     
     
         72 . The iron-type golf club head according to  claim 71 , wherein:
 each one of at least two recesses of the plurality of recesses has a volume of at least 100 mm 3 ; and   each one of at least two recesses of the plurality of recesses has an area of at least 225 mm 2 .   
     
     
         73 . The iron-type golf club head according to  claim 58 , wherein:
 in a heel-to-toe direction along the variable thickness region, the thickness of the rear wall transitions from the thickness of the rear wall between the recesses to the thickness of the rear wall defined by the recesses and from the thickness of the rear wall defined by the recesses to the thickness of the rear wall between the recesses at least four times;   a mass of the internal weight is at least 25 grams;   the strike plate comprises a strike face of the front portion, comprises a second part of the sole portion, and comprises a majority of a face-to-sole transition region of the golf club head between the strike face and the sole portion; and   a thickness of the strike plate is variable.   
     
     
         74 . The iron-type golf club head according to  claim 73 , wherein at least a portion of the rear wall located above Zup has a minimum thickness and a maximum thickness, each of which is less than 1.3 mm and greater than 0.3 mm, wherein the maximum thickness of the at least the portion of the rear wall is greater than the minimum thickness of the at least the portion of the rear wall, and a ratio of the minimum thickness of the at least the portion of the rear wall to a minimum face thickness is between 0.30 and 0.70. 
     
     
         75 . An iron-type golf club head, comprising:
 a body made of a first material having a first density, wherein:
 the body defines a heel portion, a toe portion, at least a part of a sole portion, a top portion, a part of a front portion, and a rear portion of the golf club head; and 
 the body comprises:
 a rear wall at the rear portion of the golf club head, wherein the rear wall comprises a variable thickness region comprising a plurality of recesses formed in an interior surface of the rear wall and a thickness of the rear wall, defined by the recesses, is less than the thickness of the rear wall between the recesses; 
 a face opening at the front portion of the golf club head; 
 a toe port at the toe portion of the golf club head; and 
 an internal-weight cavity; 
 
   a strike plate comprising a strike face and attached to the body so that the strike plate covers the face opening, wherein the strike plate comprises a plurality of grooves parallel to each other;   a primary beam coupled to the interior surface of the rear wall and at least a portion of the primary is coupled to the variable thickness region of the rear wall;   an internal weight seated in the internal-weight cavity and made of a second material having a second density greater than the first density;   an internal cavity enclosed at least partially by the body, the strike plate, and the internal weight; and   a filler material within the internal cavity and having a density between, and inclusive of, 0.03 grams per cubic centimeter (g/cc) and 0.30 g/cc, wherein the internal cavity is configured to receive the filler material through the toe port;   wherein a ratio of a minimum rear wall thickness to a minimum face thickness is between, and inclusive of, 0.15 and 0.65.   
     
     
         76 . The iron-type golf club head according to  claim 75 , wherein:
 in a heel-to-toe direction along the variable thickness region, the thickness of the rear wall transitions from the thickness of the rear wall between the recesses to the thickness of the rear wall defined by the recesses and from the thickness of the rear wall defined by the recesses to the thickness of the rear wall between the recesses at least four times;   a mass of the internal weight is at least 25 grams;   the strike plate comprises a strike face of the front portion, comprises a second part of the sole portion, and comprises a majority of a face-to-sole transition region of the golf club head between the strike face and the sole portion; and   a thickness of the strike plate is variable.   
     
     
         77 . The iron-type golf club head according to  claim 76 , wherein at least a portion of the rear wall located above Zup has a minimum thickness and a maximum thickness, each of which is less than 1.3 mm and greater than 0.3 mm, wherein the maximum thickness of the at least the portion of the rear wall is greater than the minimum thickness of the at least the portion of the rear wall, and a ratio of the minimum thickness of the at least the portion of the rear wall to a minimum face thickness is between 0.30 and 0.70.