US2012165124A1PendingUtilityA1

Multi-layer golf ball

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Individually held — no corporate assignee on recordPriority: Nov 28, 2001Filed: Feb 15, 2012Published: Jun 28, 2012
Est. expiryNov 28, 2021(expired)· nominal 20-yr term from priority
Inventors:Michael J. SullivanDerek A. LaddWilliam E. MorganHerbert C. Boehm
A63B 37/0027A63B 37/0043A63B 37/0003A63B 37/0063C08K 5/20A63B 37/0076A63B 37/0059A63B 37/0039A63B 37/0045A63B 37/0064A63B 37/0066A63B 37/0087A63B 37/0031A63B 37/0078A63B 37/008A63B 37/00922A63B 37/00622A63B 37/00621
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Claims

Abstract

Golf balls consisting of a dual core and a dual cover are disclosed. The surface hardness of the outer core layer is greater than the material hardness of the inner cover layer, and is preferably 75 Shore C or greater.

Claims

exact text as granted — not AI-modified
1 . A golf ball consisting of:
 a center formed from a first rubber composition and having a diameter of from 1.20 inches to 1.30 inches, a center hardness of from 60 Shore C to 70 Shore C, a surface hardness of from 75 Shore C to 85 Shore C, and a compression of from 20 to 40;   an outer core layer formed from a second rubber composition and having a surface hardness of 90 Shore C or greater;   an inner cover layer formed from a thermoplastic composition comprising a blend of ionomer resin and a maleic anhydride-grafted polymer and having a material hardness of less than 95 Shore C; and   an outer cover layer formed from a thermosetting polyurethane or polyurea composition;   wherein the surface hardness of the center is at least 10 Shore C units greater than the center hardness;   wherein the surface hardness of the outer core layer is at least 20 Shore C units greater than the center hardness; and   wherein the surface hardness of the outer core layer is greater than the material hardness of the inner cover layer.   
     
     
         2 . The golf ball of  claim 1 , wherein the surface hardness of the outer core layer is greater than the material hardness of the outer cover layer. 
     
     
         3 . The golf ball of  claim 1 , wherein the material hardness of the inner cover layer is from 80 Shore C to 90 Shore C. 
     
     
         4 . The golf ball of  claim 1 , wherein the material hardness of the inner cover layer is from 84 Shore C to 90 Shore C.

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