Golf putter head

Abstract

The present invention provides golf club heads exhibiting a relatively high moment of inertia. In certain embodiments, the present invention relates to golf putter heads comprising an aluminum inner core, which is capable of absorbing vibration, and an outer shell formed of another material, which is more dense and comprises less volume than the aluminum inner core. The material forming the outer shell may be polyurethane or nylon containing metallic powder.

1 . A golf club head comprising: 
 an inner core formed of a first material for absorbing vibration; and    an outer shell at least partially surrounding said inner core, said outer shell being formed of a second material which is more dense than said first material, said outer shell having less volume than said inner core.    
   
   
       2 . The golf club head of  claim 1 , wherein said first material is aluminum.  
   
   
       3 . The golf club head of  claim 1 , wherein said second material is polyurethane or nylon containing metallic powder.  
   
   
       4 . The golf club head of  claim 3 , wherein said metallic powder is selected from a group of metallic powders consisting of tungsten powder, copper powder and steel powder.  
   
   
       5 . The golf club head of  claim 1 , wherein said outer shell surrounds a majority of said inner core.  
   
   
       6 . The golf club head of  claim 1 , wherein a majority of said inner core is partially concealed within said outer shell.  
   
   
       7 . The golf club head of  claim 1 , wherein said inner core is partially exposed along one of a top and a bottom of the golf club head.  
   
   
       8 . The golf club head of  claim 7 , wherein said inner core is exposed along the top of the golf club head.  
   
   
       9 . The golf club head of  claim 7 , wherein said inner core is exposed along the bottom of the golf club head.  
   
   
       10 . A golf putter head comprising: 
 an inner core formed of lightweight material for absorbing vibration;    an outer shell formed of heavyweight material that is molded around said inner core so that said inner core is at least partially concealed within said outer shell, the heavyweight material being more dense than the lightweight material; and    said outer shell having less volume than said inner core.    
   
   
       11 . The golf putter head of  claim 10 , wherein said lightweight material is aluminum.  
   
   
       12 . The golf putter head of  claim 10 , wherein said heavyweight material is polyurethane or nylon containing metallic powder.  
   
   
       13 . The golf putter head of  claim 12 , wherein said metallic powder is selected from a group of metallic powders consisting of tungsten powder, copper powder and steel powder.  
   
   
       14 . The golf putter head of  claim 10 , wherein said inner core is partially exposed along one of a top and a bottom of the golf club head.  
   
   
       15 . The golf putter head of  claim 14 , wherein said inner core is exposed along the top of the golf club head.  
   
   
       16 . The golf putter head of  claim 14 , wherein said inner core is exposed along the bottom of the golf club head.  
   
   
       17 . A method of making a golf club head comprising: 
 providing an inner core formed of a first material;    providing an outer shell formed of a second material which is more dense than said first material; and    forming said outer shell so that it at least partially surrounds said inner core and has less volume than said inner core.    
   
   
       18 . The method of  claim 17 , wherein said first material is a lightweight material and wherein said second material is a heavyweight material.  
   
   
       19 . The method of  claim 18 , wherein said lightweight material is aluminum and wherein said heavyweight material is polyurethane or nylon containing metallic powder.  
   
   
       20 . The golf club head of  claim 19 , wherein said metallic powder is selected from a group of metallic powders consisting of tungsten powder, copper powder and steel powder.