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US 8,137,213 B2Granted
Multi-layer core golf ball
AssigneeAcushnet Company
InventorsMichael J. Sullivan, Derek A. Ladd, Brian Comeau, Douglas S. Goguen
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 comprises a thermoset rubber center, a thermoplastic intermediate core layer, and a thermoset rubber outer core layer. At least one of the core layers has a specific gravity of less than 1.05 g/cc and/or at least one of the core layers has a specific gravity of greater than 1.25 g/cc.
Claims9
A golf ball comprising:
- a center formed from a first thermoset rubber composition and having a diameter of from 1.250 inches to 1.580 inches, a center hardness of from 40 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 thermoplastic composition and having a thickness of 0.005 inches to 0.100 inches and a surface hardness of 60 Shore D or less;
- an outer core layer formed from a second thermoset rubber composition and having a thickness of 0.010 inches to 0.100 inches and a surface hardness of 45 Shore C or greater;
- and
- a cover layer having a thickness of from 0.010 inches to 0.050 inches and a surface hardness of 60 Shore D or greater;
- wherein the specific gravity of at least one of the center, intermediate core layer, and outer core layer is less than 1.05 g/cc;
- and
- wherein the surface hardness of the outer core layer is less than the surface hardness of the center.
5 more elements
Dependencies are inferred from the claim text.