US2006199667A1PendingUtilityA1

Low-weight two piece golf balls

47
Individually held — no corporate assignee on recordPriority: Mar 4, 2005Filed: Mar 4, 2005Published: Sep 7, 2006
Est. expiryMar 4, 2025(expired)· nominal 20-yr term from priority
Inventors:Douglas E. Jones
A63B 37/0006A63B 37/00621A63B 37/00622A63B 37/0004A63B 37/0021A63B 37/008A63B 37/0033A63B 37/0031A63B 37/002A63B 37/0012A63B 37/0024A63B 37/0018A63B 37/0074A63B 37/009A63B 37/0083A63B 37/0027A63B 37/0089A63B 37/0078A63B 37/0087A63B 37/0096
47
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Claims

Abstract

The present invention is directed to a golf ball with a core and a cover layer surrounding the core. The golf ball preferably has a weight between about 44.5 grams and about 45 grams, a diameter of at least about 1.68 inches, and a deflection of about 3.0 mm to about 4.0 mm at 100 kg. Additionally, the golf ball preferably has a coefficient of restitution of at least about 0.82 at a club head speed of 100 ft/sec. The golf ball includes aerodynamics to provide an optimal trajectory and overall distance for the low weight ball. Thus, a low weight golf ball is provided delivering improved distance with superior feel. This golf ball is specifically designed to optimize its play characteristics for low swing speed players.

Claims

exact text as granted — not AI-modified
1 . A golf ball comprising: 
 a core;    a cover layer surrounding the core, the cover layer having an exterior surface; and    a dimple pattern on the exterior surface having a plurality of dimples providing optimal trajectory and overall distance for the golf ball, wherein the golf ball has a weight between about 44.5 grams and about 45 grams, a diameter of at least 1.68 inches and a coefficient of restitution of about at least 0.82 at a club head speed of about 100 ft/sec.    
   
   
       2 . The golf ball of  claim 1 , wherein the dimple pattern includes dimples having at least three different diameters.  
   
   
       3 . The golf ball of  claim 1 , wherein the dimples cover at least 80% of the exterior surface.  
   
   
       4 . The golf ball of  claim 1 , wherein the dimples have an edge angle greater than 14 degrees to a phantom sphere concentric with and having a same diameter as the exterior surface of the cover.  
   
   
       5 . The golf ball of  claim 1 , wherein the exterior surface defines between about 200 and about 600 dimples.  
   
   
       6 . The golf ball of  claim 1 , wherein the plurality of dimples comprise an aerodynamic coefficient magnitude defined by C mag =√(C L   2 +C D   2 ) and an aerodynamic force angle defined by Angle=tan −1 (C L /C D ), wherein C L  is a lift coefficient and C D  is a drag coefficient, wherein the golf ball comprises: 
 an outer land surface, wherein the outer land surface comprises, at least one first substantially constant width and at least one second substantially constant width, wherein said first and second widths separate the dimples;    a first aerodynamic coefficient magnitude from about 0.24 to about 0.27 and a first aerodynamic force angle of about 31 degrees to about 35 degrees at a Reynolds Number of about 230000 and a spin ratio of about 0.085; and    a second aerodynamic coefficient magnitude from about 0.25 to about 0.28 and a second aerodynamic force angle of about 34 degrees to about 38 degrees at a Reynolds Number of about 207000 and a spin ratio of about 0.095.    
   
   
       7 . The golf ball of  claim 6 , further comprising: 
 a third aerodynamic coefficient magnitude from about 0.26 to about 0.29 and a third aerodynamic force angle of about 35 degrees to about 39 degrees at a Reynolds Number of about 184000 and a spin ratio of about 0.106; and    a fourth aerodynamic coefficient magnitude from about 0.27 to about 0.30 and a fourth aerodynamic force angle of about 37 degrees to about 42 degrees at a Reynolds Number of about 161000 and a spin ratio of about 0.122.    
   
   
       8 . The golf ball of  claim 7 , further comprising: 
 a fifth aerodynamic coefficient magnitude from about 0.29 to about 0.32 and a fifth aerodynamic force angle of about 39 degrees to about 43 degrees at a Reynolds Number of about 138000 and a spin ratio of about 0.142; and    a sixth aerodynamic coefficient magnitude from about 0.32 to about 0.35 and a sixth aerodynamic force angle of about 40 degrees to about 44 degrees at a Reynolds Number of about 115000 and a spin ratio of about 0.170.    
   
   
       9 . The golf ball of  claim 8 , further comprising: 
 a seventh aerodynamic coefficient magnitude from about 0.36 to about 0.40 and a seventh aerodynamic force angle of about 41 degrees to about 45 degrees at a Reynolds Number of about 92000 and a spin ratio of about 0.213; and    an eighth aerodynamic coefficient magnitude from about 0.40 to about 0.45 and an eighth aerodynamic force angle of about 40 degrees to about 44 degrees at a Reynolds Number of about 69000 and a spin ratio of about 0.284.    
   
   
       10 . The golf ball of  claim 1 , wherein at a 100 kg load the golf ball has a deflection of about 3.0 mm to about 4.0 mm.  
   
   
       11 . The golf ball of  claim 1 , wherein the golf ball has a coefficient of restitution of about 0.83 to about 0.87 at a club speed of about 100 ft/sec.  
   
   
       12 . The golf ball of  claim 11 , wherein the golf ball has a coefficient of restitution of about 0.83 to about 0.85 at a club speed of about 100 ft/sec.  
   
   
       13 . The golf ball of  claim 1 , wherein the golf ball has a coefficient of restitution of about at least 0.82 at a club head speed of about 125 ft/sec.  
   
   
       14 . The golf ball of  claim 1 , wherein the surface of the core has a Shore C material hardness of between about 50 and about 80.  
   
   
       15 . The golf ball of  claim 1 , wherein the cover layer has a thickness less than or equal to about 0.08 inch.  
   
   
       16 . The golf ball of  claim 1 , wherein the cover layer is formed of a thermoplastic material.  
   
   
       17 . The golf ball of  claim 16 , wherein said thermoplastic material is selected from the group including: partially or fully neutralized ionomers, thermoplastic polyurethane, metallocene, thermoplastic urethane, fusabond, or other single site catalyzed polymer, or blends thereof.  
   
   
       18 . The golf ball of  claim 1 , wherein the cover layer is formed of a thermoset material.  
   
   
       19 . The golf ball of  claim 18 , wherein said thermoset material is selected from the group including: aromatic urethane, light stable urethane, light stable polyurea, polyurethane-ionomer or blends thereof.  
   
   
       20 . The golf ball of  claim 1 , wherein the cover layer has a Shore D material hardness of between about 30 and about 75.  
   
   
       21 . The golf ball of  claim 1 , wherein the cover layer has a Shore D material hardness of less than about 60.  
   
   
       22 . A golf ball comprising: 
 a core;    a cover layer surrounding the core, the cover layer having an exterior surface; and    a plurality of dimples on the exterior surface of the cover layer to provide an optimal trajectory and overall distance for the golf ball,    wherein the golf ball has a weight between about 44.5 grams and about 45 grams; a deflection at 100 kg of about 3.0 mm to about 4.0 mm; a diameter of a least 1.68 inches; and a coefficient of restitution of about 0.82 to about 0.87 at a club head speed of 100 ft/sec.    
   
   
       23 . The golf ball of  claim 22 , further comprising dimples having at least three different diameters.  
   
   
       24 . The golf ball of  claim 22 , wherein the dimples cover at least 80% of the exterior surface.  
   
   
       25 . The golf ball of  claim 22 , wherein the dimples have an edge angle greater than 14 degrees to a phantom sphere concentric with and having a same diameter as the exterior surface of the cover.  
   
   
       26 . The golf ball of  claim 22 , wherein the exterior surface defines between about 200 and about 600 dimples.  
   
   
       27 . The golf ball of  claim 22 , wherein the plurality of dimples comprise an aerodynamic coefficient magnitude defined by C mag =√(C L   2 +C D   2 ) and an aerodynamic force angle defined by Angle=tan −1 (C L /C D ), wherein C L  is a lift coefficient and C D  is a drag coefficient, wherein the golf ball comprises: 
 an outer land surface, wherein the outer land surface comprises,    at least one first substantially constant width and at least one second substantially constant width, wherein said first and second widths separate the dimples;    a first aerodynamic coefficient magnitude from about 0.24 to about 0.27 and a first aerodynamic force angle of about 31 degrees to about 35 degrees at a Reynolds Number of about 230000 and a spin ratio of about 0.085; and    a second aerodynamic coefficient magnitude from about 0.25 to about 0.28 and a second aerodynamic force angle of about 34 degrees to about 38 degrees at a Reynolds Number of about 207000 and a spin ratio of about 0.095.    
   
   
       28 . The golf ball of  claim 27 , further comprising: 
 a third aerodynamic coefficient magnitude from about 0.26 to about 0.29 and a third aerodynamic force angle of about 35 degrees to about 39 degrees at a Reynolds Number of about 184000 and a spin ratio of about 0.106; and    a fourth aerodynamic coefficient magnitude from about 0.27 to about 0.30 and a fourth aerodynamic force angle of about 37 degrees to about 42 degrees at a Reynolds Number of about 161000 and a spin ratio of about 0.122.    
   
   
       29 . The golf ball of  claim 28 , further comprising: 
 a fifth aerodynamic coefficient magnitude from about 0.29 to about 0.32 and a fifth aerodynamic force angle of about 39 degrees to about 43 degrees at a Reynolds Number of about 138000 and a spin ratio of about 0.142; and    a sixth aerodynamic coefficient magnitude from about 0.32 to about 0.35 and a sixth aerodynamic force angle of about 40 degrees to about 44 degrees at a Reynolds Number of about 115000 and a spin ratio of about 0.170.    
   
   
       30 . The golf ball of  claim 29 , further comprising: 
 a seventh aerodynamic coefficient magnitude from about 0.36 to about 0.40 and a seventh aerodynamic force angle of about 41 degrees to about 45 degrees at a Reynolds Number of about 92000 and a spin ratio of about 0.213; and    an eighth aerodynamic coefficient magnitude from about 0.40 to about 0.45 and an eighth aerodynamic force angle of about 40 degrees to about 44 degrees at a Reynolds Number of about 69000 and a spin ratio of about 0.284.    
   
   
       31 . The golf ball of  claim 22 , wherein the golf ball has a coefficient of restitution of about 0.83 to about 0.85 at a club speed of about 100 ft/sec.  
   
   
       32 . The golf ball of  claim 22 , wherein the golf ball has a coefficient of restitution of about at least 0.82 at a club head speed of about 125 ft/sec.  
   
   
       33 . The golf ball of  claim 22 , wherein the cover layer has a Shore D material hardness of less than about 60.

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