US2007099725A1PendingUtilityA1

Putter head

49
Assignee: BRIDGESTONE SPORTS CO LTDPriority: Oct 28, 2005Filed: Jun 26, 2006Published: May 3, 2007
Est. expiryOct 28, 2025(expired)· nominal 20-yr term from priority
Inventors:Atsuo Tateno
A63B 53/0487A63B 53/0416
49
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A putter head that includes: a head body having a face portion; and a face insert fitted in the face portion, the face insert including: a high-hardness portion that forms a hitting surface, and a low-hardness portion jointed to the high-hardness portion and having a hardness lower than that of the high-hardness portion. The Shore D hardness of the high-hardness portion is 30 or more, the Shore D hardness of the low-hardness portion is 10 or more, and a difference between the Shore D hardness of the high-hardness portion and the Shore D hardness of the low-hardness portion is 5 or more.

Claims

exact text as granted — not AI-modified
1 . A putter head comprising: 
 a head body having a face portion; and    a face insert fitted in the face portion, the face insert including: a high-hardness portion that forms a hitting surface, and a low-hardness portion jointed to the high-hardness portion and having a hardness lower than that of the high-hardness portion, wherein the Shore D hardness of the high-hardness portion is 30 or more, the Shore D hardness of the low-hardness portion is 10 or more, and a difference between the Shore D hardness of the high-hardness portion and the Shore D hardness of the low-hardness portion is 5 or more.    
   
   
       2 . The putter head according to  claim 1 , wherein at least one of the high-hardness portion and the low-hardness portion is formed of an elastomer.  
   
   
       3 . The putter head according to  claim 1 , wherein at least one of the high-hardness portion and the low-hardness portion is formed of a urethane resin.  
   
   
       4 . The putter head according to  claim 1 , wherein a recessed portion is formed in one of the high-hardness portion and the low-hardness portion, and another one thereof is joined to an inner surface of the recessed portion.  
   
   
       5 . The putter head according to  claim 1 , wherein the low-hardness portion formed in a flat plate shape is joined to one surface of the high-hardness portion formed in a flat plate shape.  
   
   
       6 . The putter head according to  claim 1 , wherein the high-hardness portion is jointed to an inner peripheral surface of the low-hardness portion formed in a loop shape.

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