US2002123394A1PendingUtilityA1

Golf club and manufacturing method thereof

42
Priority: Mar 5, 2001Filed: Nov 7, 2001Published: Sep 5, 2002
Est. expiryMar 5, 2021(expired)· nominal 20-yr term from priority
Inventors:Masaei Tsurumaki
A63B 53/0466A63B 53/0487A63B 53/047A63B 53/0458
42
PatentIndex Score
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Claims

Abstract

A golf club whose position of the C.G. is easy to adjust, enabling a large-sized head. A shaft 7 is attached to a head 1 made by combining a plurality of metal shells 11, 12, 13, 14. The respective shells 11, 12, 14 are formed into a preset thickness such as the thickness “a” by a grinding process, using shot blasting S. Thus the reduction in weight is resulted by the grinding process, thus enabling the free distribution of the weight. As a result, it becomes easier to adjust the position of the C.G., realizing a golf club head with a larger volume.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A golf club comprising a head formed by combining a plurality of metal shells and a shaft attached to the head, wherein at least a part of said metal shells is formed into a certain thickness by a blast grinding process.  
     
     
         2 . A golf club according to  claim 1 , wherein at least a partial portion of said metal shell is formed into a different thickness than that of the remainder thereof by subjecting at least a part of a certain surface thereof to the blast grinding process.  
     
     
         3 . A method of manufacturing a golf club comprising a head formed by combining a plurality of metal shells and a shaft attached to the head, which comprises the step of adjusting a thickness of at least a part of said metal shells by a blast grinding process.  
     
     
         4 . A golf club according to  claim 1 , wherein said head is formed by combining a face shell a crown shell a sole shell and a peripheral side shell.  
     
     
         5 . A golf club according to  claim 4 , wherein said sole shell is formed integrally with said peripheral side shell.  
     
     
         6 . A method for manufacturing a golf club according to  claim 3 , wherein said head is formed by combining a face shell a crown shell a sole shell and a peripheral side shell.  
     
     
         7 . A method for manufacturing a golf club according to  claim 6 , wherein said sole shell is formed integrally with said peripheral side shell.

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