Golf club head with improved performance

Abstract

A golf club head with an improved Center of Gravity (CG) location is disclosed. More specifically, the present invention relates to a metalwood type golf club head with improved performance via shifting the CG towards a location that reduces spin, at the same time, without sacrificing launch angle and the forgiveness of the golf club head. This golf club head may generally have a unique construction capable of achieving a low and forward CG location that is less than 40 mm from the face center along a Z-axis, a CG height that is no more than 2 mm above the neutral axis, and a MOI-Y of greater than about 4,000 g-cm2.

What is claimed is: 
     
         1 . A golf club head comprising:
 a striking face portion located at a frontal portion of said golf club head;   a body portion, made out of a first material having a first density, attached to a rear of said striking face portion,   wherein said striking face portion further comprises;
 an upper striking face portion located above a geometric center of said striking face portion, and 
 a lower striking face portion located below a geometric center of said striking face portion, and 
 wherein at least a portion of said lower striking face portion has a higher density than said upper striking face portion. 
   
     
     
         2 . The golf club head of  claim 1 , wherein said lower striking face portion further comprises a weighting mechanism, wherein said weighting mechanism encompasses a portion of a leading edge portion of said golf club head. 
     
     
         3 . The golf club head of  claim 2 , wherein said weighting mechanism further comprises;
 a high density member, made out of a second material having a second density,   wherein said second density is greater than said first density.   
     
     
         4 . The golf club head of  claim 3 , wherein said second density is greater than about 7.5 g/cm 3 . 
     
     
         5 . The golf club head of  claim 4 , wherein said second density is greater than about 14 g/cm 3 . 
     
     
         6 . The golf club head of  claim 3 , wherein said weighting mechanism further comprises;
 an attachment member, adapted to engage an opening in said high density member,   wherein said attachment member secures said high density member to said leading edge portion of said golf club head.   
     
     
         7 . The golf club head of  claim 1 , wherein said lower striking face portion further comprises a leading edge portion,
 wherein said leading edge portion further comprises a chamfered leading edge, and   wherein said chamfered leading edge has a chamfer angel of between about 60 degrees to about 70 degrees.   
     
     
         8 . The golf club head of  claim 7 , wherein said chamfered leading edge is adapted to engage a weighting mechanism, said weighting mechanism further comprises;
 a high density member, made out of a second material having a second density,   wherein said second density is greater than said first density.   
     
     
         9 . The golf club head of  claim 8 , wherein said golf club head has a CG-Z-FC less than about 40 mm from a face center,
 wherein said golf club head has a CG-NA of less than about 2 mm above a neutral axis, and   wherein said golf club head has a MOI-Y of greater than about 4,000 g-cm 2 .   
     
     
         10 . A golf club head comprising:
 a striking face portion located at a frontal portion of said golf club head;   a body portion, made out of a first material having a first density, attached to a rear of said striking face portion,   wherein said striking face portion further comprises;
 an upper striking face portion located above a geometric center of said striking face portion, and 
 a lower striking face portion located below a geometric center of said striking face portion further comprising a leading edge portion, and 
   wherein said golf club head has a CG-Z-FC less than about 40 mm from a face center,   wherein said golf club head has a CG-NA of less than about 2 mm above a neutral axis, and   wherein said golf club head has a MOI-Y of greater than about 4,000 g-cm 2 .   
     
     
         11 . The golf club head of  claim 10 , wherein at least a portion of said leading edge portion has a higher density than said upper striking face portion. 
     
     
         12 . The golf club head of  claim 10 , wherein said golf club head has a CG-Z-FC of less than about 37.5 mm from said face center, said CG-NA of less than about 1.50 mm above said neutral axis, and said MOI-Y of greater than about 4,500 g-cm 2 . 
     
     
         13 . The golf club head of  claim 12 , wherein said golf club head has a CG-Z-FC of less than about 30.0 mm from said face center, said CG-NA of less than about 1.00 mm above said neutral axis, and said MOI-Y of greater than about 5,000 g-cm 2 . 
     
     
         14 . The golf club head of  claim 13 , wherein said CG-NA is less than 0 mm. 
     
     
         15 . The golf club head of  claim 10 , wherein said lower striking face portion further comprises a weighting mechanism, wherein said weighting mechanism encompasses a portion of a leading edge portion of said golf club head. 
     
     
         16 . The golf club head of  claim 15 , wherein said weighting mechanism further comprises;
 a high density member, made out of a second material having a second density,   wherein said second density is greater than said first density.   
     
     
         17 . The golf club head of  claim 16 , wherein said second density is greater than about 7.5 g/cm 3 . 
     
     
         18 . The golf club head of  claim 17 , wherein said second density is greater than about 14 g/cm 3 .