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US 2010/0075780 A1Published application
Multi-layer core golf ball
AssigneeAcushnet Company
InventorsMichael J. Sullivan, Derek A. Ladd
Life of this patent
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Abstract
Golf balls consisting of a multi-layer core and a cover are disclosed. The multi-layer core consists of a large center and a thin outer core layer that are both soft relative to a hard, thin intermediate core layer.
Claims20
A golf ball comprising:
- a center formed from a first rubber composition and having a diameter of from 1.300 inches to 1.520 inches, a center hardness of from 35 Shore C to 70 Shore C and a surface hardness of from 50 Shore C to 95 Shore C;
- an intermediate core layer formed from a second rubber composition and having a surface hardness of 85 Shore C or greater;
- an outer core layer formed from a third rubber composition and having a surface hardness of 80 Shore C or greater;
- and
- a cover layer formed from a composition having a material hardness of from 30 Shore D to 65 Shore D;
- wherein the surface hardness of the intermediate core layer is greater than the surface hardness of the center and the surface hardness of the outer core layer.
3 more elements
A golf ball consisting essentially of:
- a core having an overall diameter of from 1.580 inches to 1.660 inches, an overall core compression of from 85 to 115, and consisting of:
- a center formed from a first rubber composition and having a diameter of from 1.350 inches to 1.500 inches, a center hardness of from 50 Shore C to 65 Shore C, and a surface hardness of from 70 Shore C to 85 Shore C;
- an intermediate core layer formed from a second rubber composition and having a surface hardness of 85 Shore C or greater;
- and
- an outer core layer formed from a third rubber composition;
- and
- a cover layer formed from a polyurethane, polyurea, or polyurethane-urea hybrid composition having a flexural modulus of from 12,000 psi to 24,000 psi and a material hardness of from 40 Shore D to 60 Shore D;
- wherein the surface hardness of the intermediate core layer is greater than the surface hardness of the center and the surface hardness of the outer core layer.
5 more elements
Dependencies are inferred from the claim text.