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US 2015/0306466 A1Published application
Medium gradient dual core golf ball
AssigneeAcushnet Company
InventorsMichael J. Sullivan, Brian Comeau, Dennis Britton
Life of this patent
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Abstract
A golf ball includes an inner core layer having a first surface hardness and a geometric center hardness. The center hardness is less than the first surface hardness to define a first positive hardness gradient of about 1 to 12 Shore C. An outer core layer has a second surface hardness. A cover layer is formed over the outer core layer. The second outer surface hardness is greater than the geometric center hardness to define a second positive hardness gradient of about 12 to 22 Shore C.
Claims20
A golf ball comprising:
- an inner core layer having a first surface hardness and a geometric center hardness, the center hardness being less than the first surface hardness to define a first positive hardness gradient of about 1 to 12 Shore C;
- an outer core layer having a second surface hardness;
- and
- a cover layer disposed about the outer core layer;
- wherein the second outer surface hardness is greater than the geometric center hardness to define a second positive hardness gradient of about 12 to 22 Shore C.
2 more elements
A golf ball comprising:
- an inner core layer having a first surface hardness of about 75 to 79 Shore C and a geometric center hardness, the center hardness being about 69 to 73 Shore C and less than the first surface hardness to define a first positive hardness gradient of about 5 to 9 Shore C, the first positive hardness gradient having a first slope S1;
- an outer core layer having a second surface hardness of about 86 to 91 Shore C;
- and
- a cover layer disposed about the outer core layer;
- wherein the second outer surface hardness is greater than the geometric center hardness to define a second positive hardness gradient of about 16 to 19 Shore C, the second positive hardness gradient having a second slope S2 such that a ratio of S2 to S1 is about 10.0 or greater;
- and wherein the inner core layer comprises an antioxidant and the outer core layer is substantially free from antioxidant.
3 more elements
Dependencies are inferred from the claim text.