US2009181801A1PendingUtilityA1

Two-Layer Core Golf Ball

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Individually held — no corporate assignee on recordPriority: Jan 10, 2008Filed: Jan 10, 2008Published: Jul 16, 2009
Est. expiryJan 10, 2028(~1.4 yrs left)· nominal 20-yr term from priority
Inventors:Michael J. SullivanJeffrey L. DaltonWilliam E. Morgan
A63B 37/00621A63B 37/00622A63B 37/0003A63B 37/0064A63B 37/0074A63B 37/0051A63B 37/0043A63B 37/0047A63B 37/0066
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Claims

Abstract

Golf balls consisting of a two-layer core and a cover are disclosed. The two-layer core consists of a small, relatively hard center enclosed by a relatively soft outer core layer. The specific gravity of the center and that of the outer core layer are substantially the same.

Claims

exact text as granted — not AI-modified
1 . A golf ball consisting of a core and a cover, wherein the core has an overall diameter of from 1.40 inches to 1.66 inches and consists of:
 a center having a diameter of from 0.125 inches to 0.750 inches, a surface hardness of 70 Shore C or greater, and a specific gravity of from 0.50 g/cc to 1.20 g/cc; and   an outer core layer having a surface hardness less than the surface hardness of the center and a specific gravity substantially the same as the specific gravity of the center.   
   
   
       2 . The golf ball of  claim 1 , wherein the center is formed from a rubber composition. 
   
   
       3 . The golf ball of  claim 1 , wherein the center is formed from a partially or fully neutralized ionomeric composition. 
   
   
       4 . The golf ball of  claim 1 , wherein the core has an overall diameter of from 1.51 inches to 1.60 inches. 
   
   
       5 . The golf ball of  claim 1 , wherein the center has a diameter of from 0.250 inches to 0.375 inches. 
   
   
       6 . The golf ball of  claim 1 , wherein the center has a specific gravity of from 1.05 g/cc to 1.18 g/cc. 
   
   
       7 . The golf ball of  claim 1 , wherein the center has a surface hardness of 85 Shore C or greater. 
   
   
       8 . The golf ball of  claim 7 , wherein the outer core layer has a surface hardness of 80 Shore C or less. 
   
   
       9 . The golf ball of  claim 1 , wherein the core has an overall compression of from 60 to 100. 
   
   
       10 . The golf ball of  claim 1 , wherein the cover consists of a single layer having a surface hardness of 60 Shore D or less and a thickness of from 0.015 inches to 0.100 inches. 
   
   
       11 . The golf ball of  claim 1 , wherein the cover consists of:
 an inner cover layer having a surface hardness of 65 Shore D or greater and a thickness of from 0.020 inches to 0.080 inches; and   an outer cover layer having a surface hardness of 60 Shore D or less and a thickness of from 0.015 inches to 0.055 inches.   
   
   
       12 . The golf ball of  claim 1 , wherein the cover consists of:
 an inner cover layer formed from a partially or fully neutralized polymer composition and having a surface hardness of 65 Shore D or greater and a thickness of from 0.015 inches to 0.035 inches; and   an outer cover layer formed from a polyurethane or polyurea composition and having a material hardness of 50 Shore D or less and a thickness of from 0.015 inches to 0.035 inches.   
   
   
       13 . A golf ball consisting of:
 a core having an overall diameter of from 1.55 inches to 1.62 inches and consisting of:
 a center having a diameter of from 0.250 inches to 0.500 inches, a surface hardness of 81 Shore C or greater, and a specific gravity of from 0.50 g/cc to 1.18 g/cc; and 
 an outer core layer having a surface hardness of 90 Shore C or less and a specific gravity substantially the same as the specific gravity of the center; 
 wherein the surface hardness of the outer core layer is less than or equal to the surface hardness of the center; and 
   a cover.   
   
   
       14 . The golf ball of  claim 13 , wherein the center has a diameter of from 0.350 inches to 0.375 inches. 
   
   
       15 . The golf ball of  claim 13 , wherein the center has a surface hardness of 85 Shore C or greater. 
   
   
       16 . The golf ball of  claim 13 , wherein the outer core layer has a thickness of from 0.550 inches to 0.650 inches. 
   
   
       17 . The golf ball of  claim 13 , wherein the core has an overall compression of from 60 to 100. 
   
   
       18 . The golf ball of  claim 13 , wherein the center is formed from a rubber composition. 
   
   
       19 . The golf ball of  claim 13 , wherein the center is formed from a partially or fully neutralized ionomeric composition. 
   
   
       20 . A golf ball consisting of:
 a core having an overall diameter of from 1.55 inches to 1.60 inches and consisting of:
 a center having a diameter of from 0.250 inches to 0.500 inches, a surface hardness of 81 Shore C or greater, and a specific gravity of from 0.50 g/cc to 1.18 g/cc; and 
 an outer core layer having a surface hardness of 90 Shore C or less and a specific gravity substantially the same as the specific gravity of the center; and 
   a cover consisting of:
 an inner cover layer having a surface hardness of 65 Shore D or greater and a thickness of from 0.020 inches to 0.080 inches; and 
 an outer cover layer having a surface hardness of 60 Shore D or less and a thickness of from 0.015 inches to 0.055 inches. 
   
   
   
       21 . The golf ball of  claim 20 , wherein the surface hardness of the outer core layer is less than the surface hardness of the center. 
   
   
       22 . The golf ball of  claim 20 , wherein the surface hardness of the center is 85 Shore C or greater and the surface hardness of the outer core layer is 80 Shore C or less.

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