Golf ball having high initial velocity

Abstract

A golf ball having a variable initial velocity associated with striking the golf ball with a driver having different head speeds is disclosed. The structure of the disclosed golf ball may cause the golf ball to experience an initial velocity comparable to premium golf balls currently on the market when hit with a driver head speed less than 100 mph. However, the same golf ball may experience an initial velocity higher than premium golf balls currently on the market when hit with a driver head speed higher than 125 mph. As a result, the disclosed golf ball may have different initial velocities associated with different head speeds.

What is claimed is: 
     
         1 . A golf ball comprising,
 an inner core layer;   an outer core layer enclosing the inner core layer;   an inner cover layer enclosing the outer core layer;   an outer cover layer enclosing the inner cover layer;   wherein the inner core layer has a higher coefficient of restitution than the outer core layer, the inner cover layer, and the outer cover layer;   wherein performing the 125 mph head speed test on the golf ball results in the golf ball having an initial velocity ranging from about 173 mph to about 174 mph; and   wherein performing the 80 mph head speed test on the golf ball results in the golf ball having an initial velocity ranging from about 87 mph to about 90 mph.   
     
     
         2 . The golf ball according to  claim 1 , wherein performing the 95 mph head speed test on the golf ball results in the golf ball having an initial velocity ranging from about 115 mph to about 117 mph. 
     
     
         3 . The golf ball according to  claim 1 , wherein performing the 110 mph head speed test on the golf ball results in the golf ball having an initial velocity ranging from about 158 mph to about 160 mph. 
     
     
         4 . The golf ball according to  claim 1 , wherein the inner core layer includes a first highly neutralized acid polymer composition. 
     
     
         5 . The golf ball according to  claim 4 , wherein the first highly neutralized acid polymer composition includes one of HPF 2000 and HPF AD 1035. 
     
     
         6 . The golf ball according to  claim 5 , wherein the inner core layer includes a second highly neutralized acid polymer composition. 
     
     
         7 . The golf ball according to  claim 1 , wherein the inner core layer has a coefficient of restitution value ranging from about 0.795 to about 0.81. 
     
     
         8 . The golf ball according to  claim 1 , wherein the inner core layer has a coefficient of restitution value that is about 0.005 to about 0.02 greater than the coefficient of restitution value of the golf ball. 
     
     
         9 . The golf ball according to  claim 1 , wherein the inner cover layer has a Shore D hardness ranging from about 45 to about 55. 
     
     
         10 . A golf ball comprising,
 an inner core layer;   an outer core layer enclosing the inner core layer;   an inner cover layer enclosing the outer core layer;   an outer cover layer enclosing the inner cover layer;   wherein performing the 125 mph head speed test on the golf ball results in the golf ball having a first initial velocity;   wherein performing the 80 mph head speed test on the golf ball results in the golf ball having a second initial velocity; and   wherein the first initial velocity is about 85 mph to about 87 mph higher than the second initial velocity.   
     
     
         11 . The golf ball according to  claim 10 , wherein performing the 110 mph head speed test on the golf ball results in the golf ball having a third initial velocity that is about 85 mph to about 87 mph higher than the second initial velocity. 
     
     
         12 . The golf ball according to  claim 10 , wherein performing the 95 mph head speed test on the golf ball results in the golf ball having a third initial velocity that is about 27 mph to about 29 mph higher than the second initial velocity. 
     
     
         13 . The golf ball according to  claim 10 , wherein the inner core layer includes a first highly neutralized acid polymer composition. 
     
     
         14 . The golf ball according to  claim 13 , wherein the first highly neutralized acid polymer composition includes one of HPF 2000 and HPF AD 1035. 
     
     
         15 . The golf ball according to  claim 10 , wherein the inner core layer includes a first highly neutralized acid polymer composition and a second highly neutralized acid polymer composition and the ratio of the first highly neutralized acid polymer composition to the second highly neutralized acid polymer composition ranges from about 20:80 to about 80:20. 
     
     
         16 . The golf ball according to  claim 10 , wherein the inner core layer has a coefficient of restitution value that is about 0.005 to about 0.02 greater than the coefficient of restitution value of the golf ball. 
     
     
         17 . A golf ball comprising,
 an inner core layer including at least one first highly neutralized acid polymer composition;   an outer core layer enclosing the inner core layer;   an inner cover layer enclosing the outer core layer;   an outer cover layer enclosing the inner cover layer;   wherein performing the 125 mph head speed test on the golf ball results in the golf ball having an initial velocity ranging from about 173 mph to about 174 mph; and   wherein performing the 95 mph head speed test on the golf ball results in the golf ball having an initial velocity ranging from about 115 mph to about 117 mph.   
     
     
         18 . The golf ball according to  claim 17 , wherein the inner core layer includes at least two first highly neutralized acid polymer compositions. 
     
     
         19 . The golf ball according to  claim 17 , wherein the inner core layer has a coefficient of restitution value that is about 0.005 to about 0.02 greater than the coefficient of restitution value of the golf ball. 
     
     
         20 . The golf ball according to  claim 17 , wherein performing the 110 mph head speed test on the golf ball results in the golf ball having an initial velocity ranging from about 158 mph to about 160 mph.