Striking plate for a golf club head

Abstract

A striking plate for a golf club head includes a sweet spot region made of a first metal piece, and a non-sweet spot region surrounding the sweet spot region and defining an opening that receives the first metal piece. The sweet spot region has a striking surface flush with that of the non-sweet spot region. The non-sweet spot region is made of a second metal piece. The first and second metal pieces have crystalline phases with different crystallographic orientations.

1 . A striking plate for a golf club head, comprising:
 a sweet spot region made of a first metal piece; and   a non-sweet spot region surrounding said sweet spot region and defining an opening that receives said first metal piece, said sweet spot region having a striking surface flush with that of said non-sweet spot region, said non-sweet spot region being made of a second metal piece, said first and second metal pieces having crystalline phases with different crystallographic orientations.   
   
   
       2 . The striking plate as claimed in  claim 1 , wherein said first metal piece is glued to said second metal piece. 
   
   
       3 . The striking plate as claimed in  claim 1 , wherein said first metal piece is welded to said second metal piece. 
   
   
       4 . The striking plate as claimed in  claim 1 , wherein said first metal piece is press fitted to said second metal piece. 
   
   
       5 . The striking plate as claimed in  claim 1 , wherein said first metal piece is interlocked with said second metal piece. 
   
   
       6 . The striking plate as claimed in  claim 1 , wherein said first and second metal pieces are made of a same metal. 
   
   
       7 . The striking plate as claimed in  claim 1 , wherein said first and second metal pieces are made of different metals. 
   
   
       8 . The striking plate as claimed in  claim 1 , wherein each of said first and second metal pieces is made of a metal selected from the group consisting of stainless steel, alloy steel, molybdenum, vanadium, zirconium, titanium, aluminum, and magnesium. 
   
   
       9 . The striking plate as claimed in  claim 1 , wherein said sweet spot region protrudes inwardly from said non-sweet spot region. 
   
   
       10 . The striking plate as claimed in  claim 1 , wherein said non-sweet spot region has a flange projecting inwardly from an edge of said non-sweet spot region that confines said opening, said flange surrounding said first metal piece. 
   
   
       11 . A striking plate for a golf club head, comprising:
 a sweet spot region made of a first metal piece; and   a non-sweet spot region surrounding said sweet spot region and defining an opening that receives said first metal piece, said sweet spot region having a striking surface flush with that of said non-sweet spot region, said non-sweet spot region being made of a second metal piece.