US2016250522A1PendingUtilityA1

Multi-Layer Golf Ball

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Assignee: NIKE INCPriority: Feb 27, 2015Filed: Jan 22, 2016Published: Sep 1, 2016
Est. expiryFeb 27, 2035(~8.6 yrs left)· nominal 20-yr term from priority
Inventors:Nicholas YontzChen-Tai Liu
A63B 37/0045A63B 37/0031A63B 37/0062A63B 37/0043A63B 37/0076A63B 37/0064A63B 37/0092A63B 37/00621A63B 37/008A63B 37/0033
41
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Claims

Abstract

A multi-layer golf ball that provides a consistent feel when struck with different golf clubs has a core center having a diameter D 1 and a hardness H 1 ; a first intermediate layer outward from and surrounding the core center; a second intermediate layer outward from and surrounding the first intermediate layer having a diameter D 3 and a hardness H 3 ; and a cover outward from and surrounding the second intermediate layer; wherein the ratio of H 3 to D 3 is at least about 94% of the ratio of H 1 to D 1 (H 3 /D 3 ≧0.94 H 1 /D 1 ).

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A golf ball, comprising:
 a core center having a diameter in millimeters Di and a Shore D hardness Hi;   a first inter nediate layer outward from and surrounding the core center having a diameter in millimeters D 2  and a Shore D hardness H 2 ;   a second intermediate layer outward from and surrounding the first intermediate layer having a diameter in millimeters D 3 , a thickness in millimeters T 3 , and a Shore D hardness H 3 ; and   a cover outward from and surrounding the second intermediate layer having a diameter in millimeters D 4  and a Shore D hardness H 4 ;   wherein T 3  is at least about 0.65 mm; and   wherein the ratio of H 3  to D 3  minus the ratio of H 1  to D 1  (H 3 /D 3 −H 1 /D 1 ) is at least about −0.1 (Shore D hardness/mm).   
     
     
         2 . A golf ball according to  claim 1 , wherein the ratio of H 3  to D 3  is greater than or equal to the ratio of H 1  to D 1  (H 3 /D 3 ≧H 1 /D 1 ). 
     
     
         3 . A golf ball according to  claim 2 , wherein the ratio of H 3  to D 3  is equal to the ratio of H 1  to D 1  or is greater than the ratio of H 1  to D 1  by no more than about 0.05 (Shore D hardness/mm). 
     
     
         4 . A golf ball according to  claim 1 , wherein the maximum difference in value between the ratios of H 1  to D 1  (H 1 /D 1 ), H 2  to D 2  (H 2 /D 2 ), H 3  to D 3  (H 3 /D 3 ), H 4  to D 4  (H 4 /D 4 ) is up to about 0.42 (Shore D hardness/mm). 
     
     
         5 . A golf ball according to  claim 4 , wherein the maximum difference in value between the ratios of H 1  to D 1  (H 1 /D 1 ), H 2  to D 2  (H 2 /D 2 ), H 3  to D 3  (H 3 /D 3 ), H 4  to D 4  (H 4 /D 4 ) is up to about 0.30 (Shore D hardness/mm). 
     
     
         6 . A golf ball according to  claim 1 , the ratio of H 3  to D 3  is greater than or equal to the ratio of H 2  to D 2  (H 3 /D 3 ≧H 2 /D 2 ). 
     
     
         7 . A golf ball according to  claim 6 , wherein the ratio of H 3  to D 3  is equal to the ratio of H 2  to D 2  or is greater than the ratio of H 2  to D 2  by no more than about 0.15 (Shore D hardness/mm). 
     
     
         8 . A golf ball according to  claim 1 , wherein the ratio of H 1  to D 1  is greater than or equal to the ratio of H 4  to D 4  (H 1 /D 1 ≧H 4 /D 4 ). 
     
     
         9 . A golf ball according to  claim 8 , wherein the ratio of H 1  to D 1  is equal to the ratio of H 4  to D 4  or is greater than the ratio of H 4  to D 4  by no more than about 0.05 (Shore D hardness/mm). 
     
     
         10 . A golf ball according to  claim 1 , wherein T 3  is from about 0.65 mm to about 2.0 mm. 
     
     
         11 . A golf ball according to  claim 1 , wherein (a) the core center has a diameter of from about 28 mm to about 36 mm or (b) the first intermediate layer has a thickness of from about 2.04 mm to about 5.99 mm or both (a) and (b). 
     
     
         12 . A golf ball according to  claim 1 , wherein the cover has a thickness of from about 0.7 mm to about 1.8 mm. 
     
     
         13 . A golf ball according to  claim 1 , wherein H 3  is from about Shore D 67 to about Shore D 72. 
     
     
         14 . A golf ball according to  claim 1 , wherein H 1  is from about Shore D 46 to about Shore D 50. 
     
     
         15 . A golf bail, comprising:
 a core center having a diameter Di and a hardness H 1 ;   a first intermediate layer outward from and surrounding the core center;   a second intermediatelayer outward from and surrounding the first intermediate layer having a diameter D 3  and a hardness H 3 ; and   a cover outward from and surrounding the second intermediate layer;   wherein the ratio of H 3  to D 3  is at least about 94% of the ratio of H 1  to D 1  (H 3 /D 3 ≧0.94 H 1 /D 1 ).   
     
     
         16 . A golf ball according to  claim 15 , wherein the ratio of H 3  to D 3  is greater than or equal to the ratio of H 1  to D 1  (H 3 /D 3 ≧H 1 /D 1 ). 
     
     
         17 . A golf ball according to  claim 16 , wherein the ratio of H 3  to D 3  is from 100% to about 110% of the ratio of H 1  to D 1 . 
     
     
         18 . A golf ball according to  claim 16 , wherein the ratio of H 3  to D 3  is from 100% to about 105% of the ratio of H 1  to D 1 . 
     
     
         19 . A golfball according to  claim 17 , wherein the second intermediate layer has a thickness of at least about 0.65 mm. 
     
     
         20 . A golf ball according to  claim 15 , wherein the first intermediate layer has a diameter D 2  and a hardness H 2 , the cover has a diameter D 4  and a hardness H 4 : and wherein each of the ratio of H 1  to D 1 , the ratio of H 2  to D 2 , and the ratio of H 4  to D 4  is from about 75% to 100% of the ratio of H 3  to D 3 .

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