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 outermost core layer is heavily filled with a density increasing material and at least one core layer functions as a moisture vapor barrier. One core layer may serve to provide all the functions in a single layer.
Claims25
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, 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.
A golf ball having a multi-layer core, the core comprising:
- a center having a Shore C surface hardness of less than about 60, a compression of less than about 70, and a flex modulus less than about 20,000 psi;
- a plurality of core layers progressively disposed about the center, including a first core layer covering the center, the first core layer having a flex modulus greater than the flex modulus of the center, and each progressive core layer having a greater flex modulus than the core layer beneath it;
- and
- a cover having a Shore D hardness of less than 60.
A golf ball having a multi-layer core, the core comprising:
- a center having a Shore C surface hardness of less than about 60, a compression of less than about 70, and a flex modulus less than about 20,000 psi;
- a plurality of core layers progressively disposed about the center, including a first core layer disposed about the center and having a flex modulus no less than the flex modulus of the center, and each progressive core layer having a flex modulus no less than the flex modulus of the core layer beneath it;
- and
- a cover having a Shore D hardness of less than 60.
Dependencies are inferred from the claim text.