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US 8,939,851 B2Granted
Multi-layer golf ball
AssigneeAcushnet Company
InventorsEdmund A. Hebert, Michael J. Sullivan, Derek A. Ladd, Shawn Ricci
Life of this patent
Estimating the term…
Abstract
Multi-layer golf balls having a hard, high compression center, a relatively soft intermediate layer, and a stiff outer cover layer, are provided. The outer surface hardness of the intermediate layer is less than that of both the center and the outer cover layer.
Claims8
A golf ball comprising:
- a core having a diameter of less than 1.500 inches, an overall compression of greater than 60, and comprising two layers formed from the same or different highly neutralized polymer compositions;
- an outer cover layer formed from an ionomer composition, the ionomer composition having a flexural modulus of greater than 40,000 psi and a material hardness of greater than 60 Shore D;
- an intermediate layer disposed between the core and the outer cover layer, the intermediate layer having an outer surface hardness of less than 60 Shore D and being formed from a polyurea composition;
- wherein the outer surface hardness of the intermediate layer is less than that of both the core and the outer cover layer;
- and wherein a first golf ball subassembly consisting of the core, the intermediate layer, and any optional layers disposed between the core and the intermediate layer has a first compression;
- a second golf ball subassembly consisting of the core and the optional layers disposed between the core and the intermediate layer has a second compression;
- the first compression is less than the second compression;
- and the difference between the first compression and the second compression is at least 20 compression points.
5 more elements
A golf ball consisting essentially of:
- a core having a diameter of less than 1.500 inches, an overall compression of greater than 60, and consisting of two layers formed from the same or different highly neutralized polymer compositions;
- an outer cover layer formed from an ionomer composition, the ionomer composition having a flexural modulus of greater than 40,000 psi and a material hardness of greater than 60 Shore D;
- an intermediate layer disposed between the core and the outer cover layer, the intermediate layer having an outer surface hardness of less than 50 Shore D and being formed from a polyurea composition;
- wherein the outer surface hardness of the intermediate layer is less than that of both the core and the outer cover layer;
- and wherein a first golf ball subassembly consisting of the core and the intermediate layer has a first compression;
- a second golf ball subassembly consisting of the core has a second compression;
- the first compression is less than the second compression;
- and the difference between the first compression and the second compression is at least 20 compression points.
5 more elements
Dependencies are inferred from the claim text.