Golf club

Abstract

A golf club with an enhanced degree of freedom in design as well as high efficiency. A head 2 is formed by combining two different metallic components. One is a head body 11 having a hosel 3 , made from stainless steel such as SUS 304 that is easy to process, the other is a face plate 14 made from nickel beryllium alloy which is an expensive metal of high strength. These two components are joined to each other by laser beam welding. Thus, the inclination angle of the hosel 3 made from SUS 304 stainless steel or the like, i.e., the relative angle of the axis of a shaft 4 to the face 5 can be easily controlled, so that the loft/lie angle of a head also can be controlled easily. Further, due to the high strength of the face plate 14 , the flight distance of ball can be elongated.

What is claimed:  
     
         1 . A golf club, having a head with a shaft connected thereto, wherein said head is constructed by combining at least two components each of which being made from a different metal, said components being joined together by welding.  
     
     
         2 . A golf club, having a head with a shaft connected thereto, wherein said head is constructed of a head body with a face and a face plate corresponding to the face, 
 wherein said head body and said face plate are made from different metals, respectively, and are joined together by welding.    
     
     
         3 . A golf club, having a head with a hosel and a shaft connected with the hosel, wherein said head is constructed of a head body and a separate hosel member, corresponding to said hosel, 
 wherein said head body and said hosel member are made from different metals, respectively, and are joined together by welding.    
     
     
         4 . A golf club, having a head with a shaft connected thereto, 
 wherein said head is constructed of a head body with a face and a separate balance weight,    wherein said head body and said balance weight are made from different metals, respectively, and are joined together by welding.    
     
     
         5 . A golf club according to    claim 1   , wherein said welding is laser welding, using a laser processing machine.  
     
     
         6 . A golf club according to    claim 2   , wherein said welding is carried out by laser beam welding, using a laser-processing machine.  
     
     
         7 . A golf club according to    claim 3   , wherein said welding is carried out by laser beam welding, using a laser-processing machine.  
     
     
         8 . A golf club according to    claim 4   , wherein said welding is carried out by laser beam welding, using a laser-processing machine.  
     
     
         9 . A golf club according to    claim 2   , wherein said head body is formed by forging SUS304 stainless steel, while said face plate is formed by forging nickel beryllium alloy.  
     
     
         10 . A golf club according to    claim 3   , wherein said head body is formed by forging nickel beryllium alloy, while said hosel is formed by forging SUS304 stainless steel.  
     
     
         11 . A golf club according to    claim 4   , wherein said head body is formed by forging a metal of comparatively small specific gravity, such as titanium, titanium alloy, aluminum or aluminum alloy, while said balance weight is formed by forging a metal of comparatively large specific gravity, such as SUS304 stainless steel, copper, copper alloy.