Multi-zone golf club heads

Abstract

A golf club head with low and high density zones designed to provide specific densities for use in various parts of the club head to achieve maximum volume and properties within specific weight goals. The low and high density zones may be formed from laminates having different equivalent densities than the layers used to form the laminates.

1 . A golf club head, comprising:
 a first zone comprising a body defining an inner volume, sole, and a skirt, wherein the first zone has a first density ranging from about 3 g/cm 3  to about 4 g/cm 3 , and wherein the first zone is formed from a first laminate, wherein the first laminate comprises a first layer and a second layer, and wherein the second layer faces the inner volume;   a second zone comprising a crown, wherein the second zone is formed from a second laminate having a second density ranging from about 3 g/cm 3  to about 4 g/cm 3 , wherein the second laminate is different from the first laminate; and   a third zone comprising a face, wherein the third zone comprises a third laminate comprising three layers.   
     
     
         2 . The golf club head of  claim 1 , wherein the second density is different from the first density. 
     
     
         3 . The golf club head of  claim 1 , wherein the first layer has a density ranging from about 3 g/cm 3  to about 4 g/cm 3  and the second layer has a density ranging from about 2 g/cm 3  to about 3 g/cm 3 . 
     
     
         4 . The golf club head of  claim 1 , wherein the first layer has a first thickness from about 0.1 mm to about 0.5 mm, and wherein the second layer has a second thickness ranging from about 0.4 to about 0.8. 
     
     
         5 . The golf club head of  claim 1 , wherein the first layer has a first thickness, wherein the second layer has a second thickness, and wherein the ratio of the first thickness to second thickness ranges from about 1:1 to about 1:4. 
     
     
         6 . The golf club head of  claim 1 , further comprising a weight. 
     
     
         7 . The golf club head of  claim 1 , wherein the second laminate comprises a third layer having a third density and a fourth layer having a fourth density, wherein the fourth density is less than the third density, and wherein the fourth layer faces the inner volume. 
     
     
         8 . The golf club head of  claim 7 , wherein the third layer has a third thickness and the fourth layer has a fourth thickness, and wherein the fourth thickness is greater than the third thickness. 
     
     
         9 .- 16 . (canceled) 
     
     
         17 . A golf club head, comprising:
 a first zone comprising a body defining an inner volume, sole, and a skirt, wherein the first zone has a density ranging from about 3 g/cm 3  to about 4 g/cm 3 , and wherein the first zone is formed from a first laminate, wherein the first laminate comprises a first layer having a first density and a second layer having a second density less than the first density, and wherein the second layer faces the inner volume;   a second zone comprising a crown; and   a third zone comprising a face.   
     
     
         18 . The golf club head of  claim 17 , wherein the first layer has a density ranging from about 3 g/cm 3  to about 4 g/cm 3  and the second layer has a density ranging from about 2 g/cm 3  to about 3 g/cm 3 . 
     
     
         19 . The golf club head of  claim 17 , wherein the first layer has a first thickness, wherein the second layer has a second thickness, and wherein the ratio of the first thickness to second thickness ranges from about 1:1 to about 1:4. 
     
     
         20 . The golf club head of  claim 17 , wherein the first layer has a first thickness from about 0.1 mm to about 0.5 mm, and wherein the second layer has a second thickness ranging from about 0.4 to about 0.8. 
     
     
         21 . The golf club head of  claim 1 , wherein the first laminate comprises a cladding bond between the first and second layers. 
     
     
         22 . The golf club head of  claim 1 , wherein the first layer comprises titanium, titanium alloy, or combinations thereof and the second layer comprises aluminum, aluminum alloy, or combinations thereof. 
     
     
         23 . The golf club head of  claim 17 , wherein the first laminate comprises a cladding bond between the first and second layers. 
     
     
         24 . The golf club head of  claim 17 , wherein the first layer comprises titanium, titanium alloy, or combinations thereof and the second layer comprises aluminum, aluminum alloy, or combinations thereof. 
     
     
         25 . A golf club head, comprising a body defining an inner volume, a sole, a skirt, a crown, and a face,
 wherein the crown comprises a first laminate, wherein the first laminate has a density ranging from about 2.5 g/cm 3  to about 4.5 g/cm 3 ,   wherein the skirt and, optionally, the sole, comprises a second laminate, wherein the second laminate has a density less than the density of the first laminate and ranging from about 2.5 g/cm 3  to about 4.5 g/cm 3 , and   wherein the first laminate comprises a first layer having a first density and a second layer having a second density less than the first density, wherein the second layer faces the inner volume, and wherein the first and second layers are joined by a cladding bond.   
     
     
         26 . The golf club head of  claim 25 , wherein the first layer comprises titanium, titanium alloy, or combinations thereof and the second layer comprises aluminum, aluminum alloy, or combinations thereof. 
     
     
         27 . The golf club head of  claim 25 , wherein the first laminate has a density ranging from about 2.75 g/cm 3  to about 4.0 g/cm 3 . 
     
     
         28 . The golf club head of  claim 27 , wherein the second laminate comprises a first layer having a first density and a second layer having a second density less than the first density, wherein the second layer faces the inner volume, and wherein the first and second layers are joined by a cladding bond.