High moment of inertia composite golf club head

Abstract

A high moment of inertia golf club head composed of a composite material and having a metal weight strip in a ribbon section is disclosed herein. The metal strip may be composed of copper, tungsten or a similar metal. The moment of inertia, Izz, of the golf club head about a vertical axis Z through the center of gravity ranges from 3000 g-cm 2 to 5000 g-cm 2 , and a moment of inertia, Iyy, about a horizontal axis Y through the center of gravity of the golf club head ranges from 1900 g-cm 2 to 2050 g-cm 2 . The golf club head is preferably composed of plies of pre-peg sheets. The volume of the composite golf club head varies from 300 cm 3 to 700 cm 3 .

We claim as our invention:  
     
         1 . A golf club head comprising: 
 a body having a hollow interior, the body composed of a non-metal material;    at least one weight strip composed of a material having a density greater than the non-metal material, the at least one weight strip disposed within the body;    wherein the body has a volume greater than 300 cm 3  and has a moment of inertia, Izz, greater than 3000 g-cm 2  about a vertical axis Z through the center of gravity of the golf club head.    
     
     
         2 . The golf club head according to  claim 1  wherein the body is composed of a plurality of layers of plies of pre-preg material.  
     
     
         3 . The golf club head according to  claim 1  wherein the at least one weight strip is juxtaposed between layers of the plurality of layers of plies of pre-preg material.  
     
     
         4 . The golf club head according to  claim 1  further comprising a secondary weight member disposed on a sole.  
     
     
         5 . The golf club head according to  claim 1  wherein the at least one weight strip is composed of a material selected from the group consisting of a densified loaded film, copper, tungsten and bismuth.  
     
     
         6 . The golf club head according to  claim 1  wherein the moment of inertia, Izz, about the vertical axis Z through the center of gravity of the golf club head ranges from 3500 g-cm 2  to 5000 g-cm 2 .  
     
     
         7 . The golf club head according to  claim 1  wherein the at least one weight strip extends from a toe end of the ribbon to a heel end of the ribbon.  
     
     
         8 . The golf club head according to  claim 1  wherein the at least one weight strip extends along at least fifty percent of the length of the ribbon.  
     
     
         9 . The golf club head according to  claim 1  wherein the golf club head has a moment of inertia, Iyy, of at least 1900 g-cm 2  about a horizontal axis Y through the center of gravity of the golf club head, the horizontal axis Y orthogonal to vertical axis Z.  
     
     
         10 . The golf club head according to  claim 1  where in the golf club head has a volume that ranges from 320 cm 3  to 600 cm 3 .  
     
     
         11 . The golf club head according to  claim 1  wherein the golf club head has a mass between 150 grams to 250 grams.  
     
     
         12 . The golf club head according to  claim 1  wherein the moment of inertia, Iyy, about the horzontal axis Y through the center of gravity of the golf club head ranges from 1900 g-cm 2  to 2050 g-cm 2 .  
     
     
         13 . The golf club head according to  claim 1  wherein the moment of inertia, Izz, about the vertical axis Z through the center of gravity of the golf club head ranges from 3700 g-cm 2  to 5000 g-cm 2 .