Multi-layer golf ball
First Claim
Patent Images
1. A golf ball consisting essentially of:
- an inner core layer formed from a first thermoplastic composition and having a diameter of 0.50 inches or greater, a center hardness of 40 Shore C or greater, and an outer surface hardness (Hcenter surface) of 40 Shore C or greater;
an intermediate core layer formed from a second thermoplastic composition and having an outer surface hardness (Hintermediate core surface) of 50 Shore C or greater;
an outer core layer formed from a third thermoplastic composition and having an outer surface hardness (Houter core surface) of 55 Shore C or greater;
an inner cover layer formed from a fourth thermoplastic composition and having an outer surface hardness (Hinner cover surface) of 60 Shore C or greater; and
an outer cover layer formed from a composition selected from the group consisting of ionomers, polyurethanes, polyureas, and copolymers and blends of polyurethanes and polyureas, and having an outer surface hardness (Houter cover surface) of 70 Shore C or greater;
wherein a core structure consisting of the inner core layer, the intermediate core layer, and the outer core layer has a diameter of from 1.40 inches to 1.60 inches.
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Abstract
Multi-piece golf balls having a multi-layered solid core and multi-layered cover are provided.
26 Citations
13 Claims
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1. A golf ball consisting essentially of:
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an inner core layer formed from a first thermoplastic composition and having a diameter of 0.50 inches or greater, a center hardness of 40 Shore C or greater, and an outer surface hardness (Hcenter surface) of 40 Shore C or greater; an intermediate core layer formed from a second thermoplastic composition and having an outer surface hardness (Hintermediate core surface) of 50 Shore C or greater; an outer core layer formed from a third thermoplastic composition and having an outer surface hardness (Houter core surface) of 55 Shore C or greater; an inner cover layer formed from a fourth thermoplastic composition and having an outer surface hardness (Hinner cover surface) of 60 Shore C or greater; and an outer cover layer formed from a composition selected from the group consisting of ionomers, polyurethanes, polyureas, and copolymers and blends of polyurethanes and polyureas, and having an outer surface hardness (Houter cover surface) of 70 Shore C or greater; wherein a core structure consisting of the inner core layer, the intermediate core layer, and the outer core layer has a diameter of from 1.40 inches to 1.60 inches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A golf ball consisting essentially of:
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an inner core layer formed from a highly neutralized polymer composition and having a diameter of from 0.50 inches to 1.10 inches, a center hardness of from 40 Shore C to 65 Shore C, and an outer surface hardness (Hcenter surface) of from 40 Shore C to 75 Shore C; an intermediate core layer formed from a thermoplastic composition and having an outer surface hardness (Hintermediate core surface) of 55 Shore C or greater; an outer core layer formed from a highly neutralized polymer composition and having an outer surface hardness (Houter core surface) of from 60 Shore C to 85 Shore C; an inner cover layer formed from a thermoplastic composition and having an outer surface hardness (Hinner cover surface) of from 65 Shore C to 95 Shore C; and an outer cover layer formed from a composition selected from the group consisting of ionomers, polyurethanes, polyureas, and copolymers and blends of polyurethanes and polyureas, and having an outer surface hardness (Houter cover surface) of 75 Shore C or greater;
whereinHcenter surface<
Hintermediate core surface<
Houter core surface<
Hinner cover surface<
Houter cover surface.
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Specification