US2013196791A1PendingUtilityA1

Golf ball

48
Assignee: DUNLOP SPORTS CO LTDPriority: Jan 30, 2012Filed: Dec 21, 2012Published: Aug 1, 2013
Est. expiryJan 30, 2032(~5.6 yrs left)· nominal 20-yr term from priority
Inventors:Takahiro SajimaKazuhiko IsogawaKosuke TachibanaHidetaka Inoue
A63B 37/0004A63B 37/0021A63B 37/0006A63B 37/0019A63B 37/0017A63B 37/0018A63B 37/002
48
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Claims

Abstract

A golf ball 2 has a large number of dimples 10 on a surface thereof. The golf ball 2 meets the following mathematical formula (I): Y ≦3.8* X −2.894   (I), where X represents a ratio of a sum of areas of all the dimples 10 to a surface area of a phantom sphere of the golf ball, and Y represents a standard deviation (mm) of diameters of all the dimples 10.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A golf ball having a large number of dimples on a surface thereof, the golf ball meeting the following mathematical formula (I):
     Y≦ 3.8* X− 2.894   (I),
   
       where X represents a ratio of a sum of areas of all the dimples to a surface area of a phantom sphere of the golf ball, and Y represents a standard deviation (mm) of diameters of all the dimples. 
     
     
         2 . The golf ball according to  claim 1 , wherein the ratio X is equal to or greater than 0.78. 
     
     
         3 . The golf ball according to  claim 1 , wherein the ratio X is equal to or less than 0.95. 
     
     
         4 . The golf ball according to  claim 1 , wherein the standard deviation Y is equal to or less than 0.30 mm. 
     
     
         5 . The golf ball according to  claim 1 , wherein a number of the dimples is equal to or greater than 300 but equal to or less than 400. 
     
     
         6 . The golf ball according to  claim 1 , wherein a contour of each dimple is circular. 
     
     
         7 . The golf ball according to  claim 6 , wherein a diameter of each dimple is equal to or greater than 2.0 mm but equal to or less than 6.0 mm. 
     
     
         8 . The golf ball according to  claim 1 , wherein a depth of each dimple is equal to or greater than 0.05 mm but equal to or less than 0.60 mm. 
     
     
         9 . The golf ball according to  claim 1 , wherein a total volume of the dimples is equal to or greater than 250 mm 3  but equal to or less than 400 mm 3 . 
     
     
         10 . The golf ball according to  claim 1 , wherein the golf ball meets the following mathematical formula (II):
     Y≦ 3.8* X− 2.944   (II).
   
     
     
         11 . The golf ball according to  claim 10 , wherein the golf ball meets the following mathematical formula (III):
     Y≦ 3.8* X− 2.994   (III).

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