US2008242441A1PendingUtilityA1

Golf club head and method for making it

44
Assignee: WELL JET INTERNAT CO LTDPriority: Mar 27, 2007Filed: Mar 27, 2007Published: Oct 2, 2008
Est. expiryMar 27, 2027(~0.6 yrs left)· nominal 20-yr term from priority
Inventors:Yung-Hsiung Chen
A63B 2209/00A63B 53/04A63B 53/047A63B 60/00A63B 53/0416
44
PatentIndex Score
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References
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Claims

Abstract

A golf club head includes a hitting face and a changeable zone formed on a surface of the hitting face and having a physical feature different from that of the hitting face. Thus, all part or partial of the changeable zone of the hitting face has a hardness different from that of the hitting face, so that when the changeable zone is harder than the hitting face, the golf club head provides a greater hitting force on the golf ball due to the greater hardness of the changeable zone to increase the travel distance of the golf ball, and when the changeable zone is softer than the hitting face, the travel direction of the golf ball is controlled by the golf club head to facilitate a user controlling the travel direction the golf ball.

Claims

exact text as granted — not AI-modified
1 . A golf club head, comprising:
 a hitting face;   a changeable zone formed on a surface of the hitting face and having a physical feature different from that of the hitting face.   
   
   
       2 . The golf club head in accordance with  claim 1 , wherein the changeable zone has a crystal arrangement that is changed and different from that of the hitting face. 
   
   
       3 . The golf club head in accordance with  claim 1 , wherein the changeable zone has a structure different from that of the hitting face. 
   
   
       4 . The golf club head in accordance with  claim 1 , wherein the changeable zone has a hardness different from that of the hitting face. 
   
   
       5 . The golf club head in accordance with  claim 1 , wherein the changeable zone has a hardness greater than that of the hitting face so that the changeable zone is harder than the hitting face. 
   
   
       6 . The golf club head in accordance with  claim 1 , wherein the changeable zone has a hardness smaller than that of the hitting face so that the changeable zone is softer than the hitting face. 
   
   
       7 . The golf club head in accordance with  claim 1 , wherein the changeable zone is a hitting zone. 
   
   
       8 . The golf club head in accordance with  claim 1 , wherein all part of the changeable zone has a hardness different from that of the hitting face. 
   
   
       9 . The golf club head in accordance with  claim 1 , wherein partial of the changeable zone has a hardness different from that of the hitting face. 
   
   
       10 . The golf club head in accordance with  claim 1 , wherein the changeable zone is encompassed by the hitting face. 
   
   
       11 . The golf club head in accordance with  claim 1 , wherein the changeable zone is located at a middle position of the hitting face. 
   
   
       12 . The golf club head in accordance with  claim 1 , wherein the hitting face and the changeable zone form a flat smooth surface. 
   
   
       13 . A method for making a golf club head which has a hitting face and a changeable zone formed on a surface of the hitting face, comprising:
 working the changeable zone and the hitting face so that the changeable zone has a physical feature different from that of the hitting face.   
   
   
       14 . The method in accordance with  claim 13 , wherein the changeable zone has a crystal arrangement that is changed and different from that of the hitting face. 
   
   
       15 . The method in accordance with  claim 13 , wherein the changeable zone has a structure different from that of the hitting face. 
   
   
       16 . The method in accordance with  claim 13 , wherein the changeable zone has a hardness different from that of the hitting face. 
   
   
       17 . The method in accordance with  claim 13 , wherein the changeable zone and the hitting face are worked by punching, and the changeable zone and the hitting face are punched by different times. 
   
   
       18 . The method in accordance with  claim 13 , wherein the changeable zone and the hitting face are worked by heat treatment. 
   
   
       19 . The method in accordance with  claim 13 , wherein the changeable zone and the hitting face are worked by rolling. 
   
   
       20 . The method in accordance with  claim 13 , wherein all part or partial of the changeable zone has a hardness different from that of the hitting face.

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