Golf club heads

Abstract

Disclosed golf club heads include a body defining an interior cavity, a striking surface, a sole, a crown, and a hosel, which is configured to provide improved aerodynamic and inertia generating properties of the golf club head. Certain embodiments include an inertia generator positioned in the sole between an area proximate the club head's center of gravity and a position toeward of the center of gravity at the rear of the golf club head. Some embodiments include fixed or removable mass elements, weights or weight assemblies positioned in the sole, including, in some instances, within or adjacent to the inertia generator. In particular embodiments, one or more weight assemblies are movably retained within a weight channel defining a path along the sole.

1 . A golf club head comprising:
 a body having a bottom portion, a top portion, a front portion, a rear portion, a heel portion, and a toe portion, wherein the body has a volume of at least 390 cubic centimeters (cc);   a sole located on the bottom portion of the golf club head;   a crown located at the top portion of the golf club head; and   a striking surface positioned at the front portion of the body and configured to receive an impact, the striking surface having a striking surface area measured in square millimeters (mm 2 );   wherein the golf club head has a head origin defined as a position on the face plane at a geometric center of the face, the head origin including an x-axis tangential to the face and generally parallel to the ground when the head is in an address position where a positive x-axis extends towards the heel portion, a y-axis extending perpendicular to the x-axis and generally parallel to the ground when the head is in the address position where a positive y-axis extends from the face and through the rearward portion of the body, and a z-axis extending perpendicular to the ground, to the x-axis and to the y-axis when the 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;   a center sole portion extending from a position proximate the golf club head center of gravity to the rear portion of the body, the center sole portion comprising:
 a planar surface extending rearwardly and toewardly along the bottom portion of the sole in a generally Y-direction; 
 a toeward sole surface that slopes upwardly from the planar surface when viewed in the address position; 
 a first edge extending in a generally Y-direction on a toe side of the planar surface and defining a transition between the planar surface and the toeward sole surface; 
 a heelward sole surface that slopes upwardly from the planar surface when viewed in the address position; and 
 a second edge extending in a generally Y-direction on a heel side of the planar surface and defining a transition between the planar surface and the heelward sole surface; and 
   wherein a surface area to volume ratio calculated by converting the striking surface area into square centimeters (cm 2 ) and dividing by the volume of the golf club head body is no less than 0.06 and no greater than 0.086.   
     
     
         2 . The golf club head of  claim 1 , wherein the striking surface area is at least 2900 mm 2 . 
     
     
         3 . The golf club head of  claim 1 , wherein the striking surface area is between 3200 mm 2  and 3950 mm 2 . 
     
     
         4 . The golf club head of  claim 1 , wherein the surface area to volume ratio is no more than 0.084. 
     
     
         5 . The golf club head of  claim 1 , wherein the surface area to volume ratio is no more than 0.082. 
     
     
         6 . The golf club head of  claim 1 , wherein the surface area to volume ratio is no more than 0.080. 
     
     
         7 . The golf club head of  claim 1 , wherein the golf club head has a Zup of less than 30 mm. 
     
     
         8 . The golf club head of  claim 1 , wherein the golf club head has a Zup of less than 28 mm. 
     
     
         9 . The golf club head of  claim 1 , further comprising a weight port located on the center sole portion near the rear portion of the golf club head. 
     
     
         10 . The golf club head of  claim 1 , wherein the center of gravity x-axis coordinate is between about 2 mm and −2 mm. 
     
     
         11 . The golf club head of  claim 1 , wherein the golf club head has a moment of inertia about the center of gravity z-axis, I zz , between about 450 kg·mm 2  and about 650 kg·mm 2 . 
     
     
         12 . The golf club head of  claim 1  having a club head depth of between 110 mm and 120 mm. 
     
     
         13 . The golf club head of  claim 1  having a club head length between 120 mm and 130 mm. 
     
     
         14 . The golf club head of  claim 1 , wherein a ratio of the club head depth to the club head length is no more than 0.94. 
     
     
         15 . The golf club head of  claim 1  having a maximum crown height between 55 mm and 65 mm. 
     
     
         16 . The golf club head of  claim 1 , wherein the center of gravity of the golf club head is positioned toeward of the head origin. 
     
     
         17 . The golf club head of  claim 1 , wherein a rearwardmost point of the golf club head is located below the center of gravity of the golf club head. 
     
     
         18 . The golf club head of  claim 1 , further comprising at least one composite crown panel having a surface area of at least 9000 mm 2 . 
     
     
         19 . The golf club head of  claim 1 , further comprising at least one composite sole panel having a surface area of at least 2000 mm 2 . 
     
     
         20 . The golf club head of  claim 19 , further comprising at least one additional composite sole panel having a surface area of at least 4000 mm 2 . 
     
     
         21 .- 34 . (canceled)