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US 2004/0176186 A1Published application
Multi-layered core golf ball
AssigneeAcushnet Company
InventorsMichael J. Sullivan, Derek A. Ladd, Antonio U. DeSimas
Life of this patent
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Abstract
The present invention is directed towards a multi-layered core golf ball that comprises a center, a cover and at least two core layers formed around the center to create an inner ball, wherein the outermost core layer is relatively stiff and hard relative to the center. One intermediate core layer is comprised of a fully neutralized ionomer.
Claims27
A golf ball comprising:
- a multi-layer core having:
- a center having a Shore C surface hardness of less than about 80 and a compression of less than 70,
- at least one rigid outer core layer having a flex modulus greater than 40,000 psi and a Shore C hardness of greater than 80;
- an intermediate core layer interposed between the center and the rigid outer core layer comprised of a fully neutralized ionomer, and having a flex modulus less than 20,000 psi and a Shore C hardness less than 60;
- and
- a cover having a Shore D hardness of less than 65.
3 more elements
A golf ball comprising:
- a multi-layer core having:
- a center,
- at least one rigid outer core layer having a flex modulus greater than 40,000 psi and a Shore C hardness of greater than 80,
- an intermediate core layer comprised of a fully neutralized ionomer, and interposed between the center and the rigid outer core layer, having a flex modulus less than 20,000 psi and a Shore C hardness less than 60:
- and
- a cover having a Shore D hardness of less than 65.
3 more elements
Dependencies are inferred from the claim text.