Golf club head

Abstract

A golf club head includes a hollow head body having a front striking member, an upper shell portion extending rearwardly from the front striking member, and a lower shell portion extending rearwardly from the front striking member and connected to the upper shell portion. One of the upper and lower shell portions is made of plastic, and the other one of the upper and lower shell portions is made of metal. The plastic shell portion has an inner surface, and reinforcing ribs projecting from the inner surface. The front striking member has a rear inner surface free of the reinforcing ribs projecting therefrom. By virtue of the reinforcing ribs on the plastic shell portion, the distance of the center of gravity of the hollow head body from the front striking member can be increased.

1 . A golf club head, comprising:
 a hollow head body having a front striking member, an upper shell portion extending rearwardly from said front striking member, and a lower shell portion extending rearwardly from said front striking member and connected to said upper shell portion, said upper and lower shell portions and said front striking member cooperatively confining an enclosed inner space;   wherein one of said upper and lower shell portions is made of plastic, the other one of said upper and lower shell portions is made of metal, said one of said upper and lower shell portions has an inner surface, and a plurality of reinforcing ribs projecting from said inner surface, and said front striking member has a rear inner surface which is free of the reinforcing ribs projecting therefrom, whereby presence of said reinforcing ribs of said one of said upper and lower shell portions can increase the distance of the center of gravity of said hollow head body from said front striking member.   
   
   
       2 . The golf club head as claimed in  claim 1 , wherein said reinforcing ribs are provided at a distance of at least 2 cm from said front striking member. 
   
   
       3 . The golf club head as claimed in  claim 1 , wherein said upper shell portion and said reinforcing ribs are made of plastic, and said reinforcing ribs project from said upper shell portion. 
   
   
       4 . The golf club head as claimed in  claim 3 , wherein said reinforcing ribs are formed as one piece with said upper shell portion. 
   
   
       5 . The golf club head as claimed in  claim 1 , wherein said upper shell portion is made of plastic, and said reinforcing ribs are made of metal and project from said upper shell portion. 
   
   
       6 . The golf club head as claimed in  claim 1 , wherein said reinforcing ribs are parallel to each other. 
   
   
       7 . The golf club head as claimed in  claim 6 , wherein said reinforcing ribs are straight. 
   
   
       8 . The golf club head as claimed in  claim 6 , wherein said reinforcing ribs are curved. 
   
   
       9 . The golf club head as claimed in  claim 1 , wherein said reinforcing ribs extend along intersecting lines. 
   
   
       10 . The golf club head as claimed in  claim 1 , wherein said lower shell portion and said reinforcing ribs are made of plastic, and said reinforcing ribs project from said lower shell portion. 
   
   
       11 . The golf club head as claimed in  claim 10 , wherein said reinforcing ribs are formed as one piece with said lower shell portion. 
   
   
       12 . The golf club head as claimed in  claim 1 , wherein said lower shell portion is made of plastic, and said reinforcing ribs are made of metal and project from said lower shell portion.