Golf club head with multi-material components

Abstract

A metal wood golf club wherein a portion of the golf club head made from more than one material is disclosed. More specifically, due to the unique construction of a golf club head having multiple materials, the present invention utilizes diffusion bonding, liquid interface diffusion, or even super plastic forming techniques to achieve the desirable bond between the more than one material used to form different portions of the golf club head. The different materials could even be the same base material with different compositions as long as they have different Young's modulus.

What is claimed is: 
     
         1 . A golf club head comprising:
 a striking face portion located at a frontal portion of said golf club head; and   a body portion attached to an aft portion of said striking face portion;   where at least one of said striking face portion and said body portion further comprises a titanium insert;   wherein said titanium insert further comprises;
 a first outer layer, made out of a first material, forming an exterior surface of said chip insert; 
 a second backing layer, made out of a similar material as said first outer,
 wherein said first outer layer and said second backing layer combine to form a cavity; and 
 
 a chip insert, made out of a second material of steel, placed within said cavity. 
   
     
     
         2 . The golf club head of  claim 1 , wherein said second material has a second Young's modulus that is greater than a first Young's modulus of said first material. 
     
     
         3 . The golf club head of  claim 2 , wherein said second Young's modulus is greater than about 130 GPa. 
     
     
         4 . The golf club head of  claim 3 , wherein said second Young's modulus is greater than about 150 GPa. 
     
     
         5 . The golf club head of  claim 4 , wherein said second Young's modulus is greater than about 170 GPa. 
     
     
         6 . The golf club head of  claim 5 , wherein said titanium insert is formed using a diffusion bonding process. 
     
     
         7 . The golf club head of  claim 5 , wherein said titanium insert is formed using a liquid interface diffusion process. 
     
     
         8 . The golf club head of  claim 5 , wherein said titanium insert is formed using a super plastic forming process. 
     
     
         9 . The golf club head of  claim 5 , wherein said chip insert has a volume of about 371.45 mm 3 . 
     
     
         10 . A metalwood golf club head comprising:
 a striking face portion located at a frontal portion of said golf club head; and   a hollow body portion attached to an aft portion of said striking face portion;   where at least one of said striking face portion and said body portion further comprises a titanium insert;   wherein said titanium insert further comprises;
 a first outer layer, made out of a first material, forming an exterior surface of said chip insert; 
 a second backing layer, made out of a similar material as said first outer,
 wherein said first outer layer and said second backing layer combine to form a cavity; and 
 
 a chip insert, made out of a second material of steel, placed within said cavity; and 
   wherein said titanium insert is located at least one of a crown portion or a sole portion of said hollow body portion.   
     
     
         11 . The metalwood golf club head of  claim 10 , wherein said titanium insert is located at a crown portion of said hollow body portion. 
     
     
         12 . The metalwood golf club head of  claim 10 , wherein said titanium insert is located at a sole portion of said hollow body portion. 
     
     
         13 . The metalwood golf club head of  claim 10 , wherein said first outer layer has a thickness of between about 0.75 mm to about 1.25 mm at its thinnest area. 
     
     
         14 . The metalwood golf club head of  claim 13 , wherein said first outer layer has a thickness of between about 0.85 mm to about 1.55 mm at its thinnest area. 
     
     
         15 . The metalwood golf club head of  claim 10 , wherein said second Young's modulus is greater than about 130 GPa. 
     
     
         16 . The golf club head of  claim 15 , wherein said second Young's modulus is greater than about 150 GPa. 
     
     
         17 . The golf club head of  claim 16 , wherein said second Young's modulus is greater than about 170 GPa.