Patent ID: 8672777
Filing Date: 2014-03-18
Classification: A63B

Abstract:
1. A golf ball comprising: a unitary core having a volume, an outer surface, a geometric center, and an outermost transition volume adjacent to the outer surface, the core being formed from a substantially homogenous composition; wherein the outermost transition volume is disposed between the outer surface and the geometric center, has an outer portion congruent with the outer surface, has an inner portion and the hardness within the transition volume decreases by at least 2 Shore C/mm in a direction away from the inner portion and towards the outer portion, and comprises the outermost 5% to 40% of the unitary core volume or less; and a cover; and wherein both a hardness of the core outer surface and a hardness within the outermost transition volume are less than the hardness of the geometric center to define a negative hardness gradient.