Golf club with coefficient of restitution feature

Abstract

A golf club head includes a face; a body, the body defining an interior and an exterior; the face and the body together defining a center of gravity, the center of gravity being proximate the face; a coefficient of restitution feature defined in the body; wherein the coefficient of restitution feature defines a gap in the body. A golf club head includes a face and a golf club body; the face and the golf club body defining a center of gravity, the center of gravity defined a distance, Δ z , from a ground plane as measured along a z-axis, the center of gravity defined a distance, CG y , from the center face along the y-axis.

1 - 20 . (canceled) 
     
     
         21 . A hollow body golf club head, comprising:
 a body, comprising a face, a top portion, a sole portion, a heel region, a toe region, and a rear portion, and a body interior surface defining an interior cavity;   the face including a geometric center defining an origin of a coordinate system, the coordinate system including:
 an x-axis tangential to the face and generally parallel to a ground plane when the golf club head is in an address position where a positive x-axis extends towards a heel portion; 
 a y-axis extending perpendicular to the x-axis and generally parallel to the ground plane when the golf club head is in the address position where a positive y-axis extends from the face and through a rearward portion of the body; and 
 a z-axis extending perpendicular to the ground plane, to the x-axis and to the y-axis when the golf club head is in the address position where a positive z-axis extends from the head origin and generally upward, wherein the golf club head has a center of gravity with a y-axis coordinate (CG y ) measured from the origin of the coordinate system to the center of gravity of the golf club head along the y-axis when the golf club head is in the address position, and the golf club head has a Δ z  value measured from the ground plane to the center of gravity of the golf club head along the z-axis when the golf club head is in the address position; and 
   a sole wrap insert, wherein the sole wrap insert wraps from the sole onto the face of the golf club head and the sole wrap insert includes at least a portion of a coefficient of restitution feature (CORF), wherein the CORF is a through-slot that is at least partially filled with a non-metal filler material;   wherein the through-slot has a length of at least 33 mm as measured along the x-axis, and the wherein the sole wrap insert extends from a heelward portion of the body to a toeward portion of the body and has a width as measured along the x-axis and the width of the sole wrap insert is greater than the through-slot length.   
     
     
         22 . The golf club head according to  claim 21 , wherein the sole wrap insert is welded to the body 
     
     
         23 . The golf club head according to  claim 21 , wherein the sole wrap insert includes an entirety of the through-slot. 
     
     
         24 . The golf club head according to  claim 21 , wherein the golf club head has a CG effectiveness product (CG eff ) calculated by multiplying CG y  by Δ z  (CG eff CG y ×Δ z ) which is between 200 mm 2  and 325 mm 2 . 
     
     
         25 . The golf club head according to  claim 21 , wherein the interior is at least partially filled with a non-metal filler material proximate the through-slot. 
     
     
         26 . The golf club head according to  claim 21 , wherein the sole wrap insert is formed from a greater density material than the body. 
     
     
         27 . The golf club head according to  claim 21 , wherein at least a portion of the sole wrap insert has an overhang portion that extends forward toward the face and overhangs an interior surface, thereby creating a recess under the overhang portion. 
     
     
         28 . The golf club head according to  claim 21 , wherein Δ z  is from 8 mm to 16 mm and CG y  is from 20.25 mm to 32 mm. 
     
     
         29 . The golf club head according to  claim 21 , wherein the sole wrap insert has a length along the y-axis of 12 to 32 mm or 45 to 62 mm. 
     
     
         30 . The golf club head according to  claim 21 , wherein the body includes a port for receiving a weight. 
     
     
         31 . The golf club head according to  claim 30 , wherein the sole wrap insert includes a port for receiving a weight. 
     
     
         32 . The golf club head according to  claim 21 , further comprising an adjustable head-shaft connection assembly for coupling the golf club head to a golf club shaft at different angles. 
     
     
         33 . The golf club head according to  claim 21 , wherein the face has a thickness that varies at different points across the face. 
     
     
         34 . A hollow body golf club head, comprising:
 a body, comprising a face, a top portion, a sole portion, a heel region, a toe region, a rear portion, and a body interior surface defining an interior cavity;   wherein the face has a thickness that varies at different points across the face;   the face including a geometric center defining an origin of a coordinate system, the coordinate system including:
 an x-axis tangential to the face and generally parallel to a ground plane when the golf club head is in an address position where a positive x-axis extends towards a heel portion; 
 a y-axis extending perpendicular to the x-axis and generally parallel to the ground plane when the golf club head is in the address position where a positive y-axis extends from the face and through a rearward portion of the body; and 
 a z-axis extending perpendicular to the ground plane, to the x-axis and to the y-axis when the golf club head is in the address position where a positive z-axis extends from the head origin and generally upward, wherein the golf club head has a center of gravity with a y-axis coordinate (CG y ) measured from the origin of the coordinate system to the center of gravity of the golf club head along the y-axis when the golf club head is in the address position, and the golf club head has a Δ z  value measured from the ground plane to the center of gravity of the golf club head along the z-axis when the golf club head is in the address position; and 
   a sole wrap insert, wherein the sole wrap insert wraps from the sole onto the face of the golf club head and the sole wrap insert includes at least a portion of a coefficient of restitution feature (CORF), wherein the CORF is a through-slot that is at least partially filled with a non-metal filler material;   wherein the through-slot has a length of at least 33 mm as measured along the x-axis, and the wherein the sole wrap insert extends from a heelward portion of the body to a toeward portion of the body and has a width as measured along the x-axis and the width of the sole wrap insert is greater than the through-slot length;   wherein the golf club head has a CG effectiveness product (CG eff ) calculated by multiplying CG y  by Δ z (CG eff =CG y ×Δ z ) which is between 162 mm 2  and 325 mm 2 ; and   wherein the sole wrap insert is welded to the body and includes an entirety of the through-slot.   
     
     
         35 . The golf club head according to  claim 34 , wherein the interior is at least partially filled with a non-metal filler material proximate the through-slot. 
     
     
         36 . The golf club head according to  claim 34 , wherein CG y  is from 20.25 mm to 32 mm. 
     
     
         37 . The golf club head according to  claim 34 , wherein Δ z  is from 8 mm to 16 mm and CG y  is from 20.25 mm to 32 mm. 
     
     
         38 . The golf club head according to  claim 34 , wherein the body includes a port for receiving a weight. 
     
     
         39 . The golf club head according to  claim 34 , further comprising an adjustable head-shaft connection assembly for coupling the golf club head to a golf club shaft at different angles. 
     
     
         40 . A hollow body golf club head, comprising:
 a body, comprising a face, a top portion, a sole portion, a heel region, a toe region, a rear portion, and a body interior surface defining an interior cavity; and   a hosel for receiving at least a portion of an adjustable head-shaft connection assembly which couples the golf club head to a golf club shaft at different angles;   wherein the face has a thickness that varies at different points across the face;   the face including a geometric center defining an origin of a coordinate system, the coordinate system including:
 an x-axis tangential to the face and generally parallel to a ground plane when the golf club head is in an address position where a positive x-axis extends towards a heel portion; 
 a y-axis extending perpendicular to the x-axis and generally parallel to the ground plane when the golf club head is in the address position where a positive y-axis extends from the face and through a rearward portion of the body; and 
 a z-axis extending perpendicular to the ground plane, to the x-axis and to the y-axis when the golf club head is in the address position where a positive z-axis extends from the head origin and generally upward, wherein the golf club head has a center of gravity with a y-axis coordinate (CG y ) measured from the origin of the coordinate system to the center of gravity of the golf club head along the y-axis when the golf club head is in the address position, and the golf club head has a Δ z  value measured from the ground plane to the center of gravity of the golf club head along the z-axis when the golf club head is in the address position; 
   the sole including a through-slot that is at least partially filled with a non-metal filler material;   wherein the through-slot has a length of at least 33 mm as measured along the x-axis;   wherein the body includes a port for receiving a weight and the port is located rearward of the through-slot;   wherein a height of the top portion as measured parallel to the z-axis ranges from 55-70 mm and an effective face height as measured parallel to the z-axis and measured from a highest point on the face to a lowest point on the face ranges from 47-57 mm; and   wherein a peak height of the top portion as measured parallel to the z-axis is greater than a peak height of the hosel as measured parallel to the z-axis.