Multi-layer core golf ball having opposing hardness gradient...

Details Multi-layer core golf ball having opposing hardness gradient... Multi-layer core golf ball having opposing hardness gradient...

2008-07-22

2010-06-29

Trimiew, Raeann (Department: 3711)

Games using tangible projectile

Golf

Ball

Reexamination Certificate

active

07744489

ABSTRACT:
A golf ball comprising an inner core having an outer surface and a geometric center and being formed from a substantially homogenous composition such that the geometric center has a hardness of 51 to 76 Shore C and the outer surface has a hardness of 50 to 75 Shore C. An outer core layer is disposed about the inner core and has an outer surface having a hardness of 85 to 98 Shore C and an inner surface having a hardness of 68 to 78 Shore C and being formed from a second substantially homogenous rubber composition, the rubber composition comprising a base rubber and a resorcinol. A cover layer is disposed about the outer core layer. The hardness of the second outer surface is greater than the hardness of the inner surface to define a positive hardness gradient of greater than 15 Shore C, and the hardness of the first outer surface is lower than the hardness of the geometric center to define a negative hardness gradient of −1 to −5 Shore C.

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