Multi-material golf club head

Abstract

A multi-material golf club head wherein the junction between the two different components made from different materials are seamlessly incorporated within existing visual cues of a golf club head is disclosed. More specifically, the present invention adjusts the design of the bond between the two different components to reflect the needs of the golf club head at the various visual cues around the perimeter of the golf club head.

What is claimed is: 
     
         1 . A golf club head comprising:
 a body portion further comprising a striking face, a hosel, and a portion of a sole,
 wherein said striking face portion defines a forwardmost vertical plane, and 
 wherein said body portion further comprises a recess around a perimeter of said body portion, 
 a crown portion, wherein said crown portion overlaps said body portion at said recess of said body portion, and 
   wherein a forwardmost point of said crown portion is located less than about 17.5 mm away from said forwardmost vertical plane and forms a portion of the uppermost point of said striking face.   
     
     
         2 . The golf club head of  claim 1 , wherein said forwardmost point of said crown portion is located less than about 16.5 mm away from said forwardmost vertical plane. 
     
     
         3 . The golf club head of  claim 2 , wherein said forwardmost point of said crown portion is located less than about 15.5 mm away from said forwardmost vertical plane. 
     
     
         4 . The golf club head of  claim 3 , wherein said crown portion has a first density, and said body portion has a second density, Wherein said first density is smaller than said second density. 
     
     
         5 . The golf club head of  claim 4 , wherein said crown portion is made from a material having a density of less than about 2.0 g/cc. 
     
     
         6 . The golf club head of  claim 5 , wherein said body portion is made from a material having a density of about 4.5 g/cc. 
     
     
         7 . The golf club head of  claim 4 , wherein said recess further comprises
 a frontal crown recess,
 wherein said frontal crown recess defines a crown transition overlap length, 
   a rear sole recess,
 wherein said rear sole recess defines a rear overlap length, and 
   a hosel portion recess,
 wherein said hosel portion recess defines a hosel overlap length, 
   wherein said crown transition overlap length is greater than about 12 mm and less than about 25 mm.   
     
     
         8 . The golf club head of  claim 7 , wherein said crown transition overlap length is greater than about 13 mm and less than about 24 mm. 
     
     
         9 . The golf club head of  claim 8 , wherein said crown transition overlap length is greater than about 14 mm and less than about 23.5 mm. 
     
     
         10 . The golf club head of  claim 7 , wherein said golf club head has a Ratio of Front to Rear Overlap Length of greater than about 2.0; said Ratio of Front to Rear Overlap Length defined as 
       
         
           
             
               
                 Ratio 
                 ⁢ 
                     
                 of 
                 ⁢ 
                     
                 Front 
                 ⁢ 
                     
                 to 
                 ⁢ 
                     
                 Rear 
                 ⁢ 
                     
                 Overlap 
                 ⁢ 
                     
                 Length 
               
               = 
               
                 
                   
                     Crown 
                     ⁢ 
                         
                     transition 
                     ⁢ 
                         
                     overlap 
                     ⁢ 
                         
                     length 
                     ⁢ 
                         
                     D 
                     ⁢ 
                     2 
                   
                   
                     Rear 
                     ⁢ 
                         
                     overlap 
                     ⁢ 
                         
                     length 
                     ⁢ 
                         
                     D 
                     ⁢ 
                     3 
                   
                 
                 . 
               
             
           
         
       
     
     
         11 . The golf club head of  claim 10 , wherein said Ratio of Front to Rear Overlap Length is greater than about 2.5. 
     
     
         12 . The golf club head of  claim 11 , wherein said Ratio of Front to Rear Overlap Length is greater than about 3.0. 
     
     
         13 . A golf club head comprising:
 a body portion further comprising a striking face, a hosel, and a portion of a sole,
 wherein said striking face portion defines a forwardmost vertical plane along the z-axis that abuts the leading edge of a face sole junction when the golf club is in the address position, and 
 wherein said body portion further comprises a recess around a perimeter of said body portion, said recess further comprise; 
 a frontal crown recess,
 wherein said frontal crown recess defines a crown transition overlap length, 
 
 a rear sole recess,
 wherein said rear sole recess defines a rear overlap length, and 
 
   a hosel portion recess,
 wherein said hosel portion recess defines a hosel overlap length, and 
 a crown portion, wherein said crown portion overlaps said body portion at said recess of said body portion, and 
   wherein said crown transition overlap length is greater than about 12 mm and less than about 25 mm.   
     
     
         14 . The golf club head of  claim 13 , wherein said crown transition overlap length is greater than about 13 mm and less than about 24 mm. 
     
     
         15 . The golf club head of  claim 14 , wherein said crown transition overlap length is greater than about 14 mm and less than about 23.5 mm. 
     
     
         16 . The golf club head of  claim 15 , wherein a forwardmost point of said crown portion is located less than about 17.5 mm away from said forwardmost vertical plane. 
     
     
         17 . The golf club head of  claim 16 , wherein said crown transition overlap length is greater than about 13 mm and less than about 24 mm. 
     
     
         18 . The golf club head of  claim 17 , wherein said crown transition overlap length is greater than about 14 mm and less than about 23.5 mm. 
     
     
         19 . A golf club head comprising:
 a body portion further comprising a striking face, a hosel, and a portion of a sole,
 wherein said striking face portion defines a forwardmost vertical plane along the z-axis that abuts the leading edge of a face sole junction when the golf club is in the address position, and 
 wherein said body portion further comprises a recess around a perimeter of said body portion, said recess further comprise; 
 a frontal crown recess,
 wherein said frontal crown recess defines a crown transition overlap length, 
 
 a rear sole recess,
 wherein said rear sole recess defines a rear overlap length, and 
 
   a hosel portion recess, and
 wherein said hosel portion recess defines a hosel overlap length, and 
 a crown portion, wherein said crown portion overlaps said body portion at said recess of said body portion, 
   wherein said crown transition overlap length is greater than about 12 mm and less than about 25 mm,   wherein said rear overlap length is less than about 6.5 mm, and   wherein said hosel overlap length is greater than about 8 mm.   
     
     
         20 . The golf club head of  claim 19 , a forwardmost point of said crown portion is located less than about 17.5 mm away from said forwardmost vertical plane.