Golf balls having multi-layered foam cores with structural inserts
First Claim
1. A golf ball, comprising a core assembly and a cover, the core assembly comprising:
- i) an inner core comprising a foam composition having a geometric center and outer surface, the inner core having a specific gravity (SGinner core) and an outer surface hardness (Hinner core surface) and a center hardness (Hinner core center), the Hinner core center being greater than the Hinner core surface to provide a negative or zero hardness gradient across the inner core; and
ii) a non-continuous outer core layer, the outer core layer having a specific gravity (SGouter core) and an outer surface hardness (Houter surface of OC), wherein the SGinner core>
SGouter core and the Hinner core center is in the range of about 13 to about 55 Shore C and the Houter surface of OC is in the range of about 68 to about 94 Shore C to provide a positive hardness gradient across the core assembly.
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Accused Products
Abstract
Multi-layered, golf balls having a core made of a foamed composition are provided. The core preferably has a foam inner core (center) and surrounding thermoset or thermoplastic outer core layer. The core also includes a structural insert such as, for example, a solid shell, perforated shell, a lattice or mesh, or a central hub with extending arms, and the like. The core layers have different hardness gradients and specific gravity values. The ball further includes a cover having at least one layer. By adjusting the respective specific gravity values of the core layers, the Moment of Inertia (MOI) of the ball can be increased or decreased. In one embodiment, the ball has generally good flight distance and low spin rate.
21 Citations
10 Claims
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1. A golf ball, comprising a core assembly and a cover, the core assembly comprising:
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i) an inner core comprising a foam composition having a geometric center and outer surface, the inner core having a specific gravity (SGinner core) and an outer surface hardness (Hinner core surface) and a center hardness (Hinner core center), the Hinner core center being greater than the Hinner core surface to provide a negative or zero hardness gradient across the inner core; and ii) a non-continuous outer core layer, the outer core layer having a specific gravity (SGouter core) and an outer surface hardness (Houter surface of OC), wherein the SGinner core>
SGouter core and the Hinner core center is in the range of about 13 to about 55 Shore C and the Houter surface of OC is in the range of about 68 to about 94 Shore C to provide a positive hardness gradient across the core assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification