Golf ball
First Claim
Patent Images
1. A golf ball comprising:
- an inner core having a specific gravity of less than 1.05 g/cc with a compression of greater than 70;
an inner casing layer disposed around the inner core, the inner casing layer having a flexural modulus greater than 30,000 psi, a Shore C hardness greater than 80, and a thickness less than about 0.060 inch;
an outer core layer encompassing the inner casing layer, the outer core layer having a flexural modulus of less than 30 kpsi, a Shore C hardness less than 80, a specific gravity of less than 1.05 g/cc, and a thickness less than about 0.050 inch;
an outer casing layer having a flex modulus greater than 60 kpsi, a thickness less than about 0.030 inch, and a specific gravity greater than 1.25 g/cc; and
an outer cover having a hardness of less than 65 Shore D, and a thickness less than 0.040 inch.
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Abstract
The present invention is directed towards a multi-layered core golf ball that comprises a thermoplastic inner casing layer molded between two polybutadiene core layers to create a faster golf ball with less spin, by designing a ball that has more of the stored energy of the core released at impact. One inner casing layer and/or an outer core layer is comprised of a partially or fully neutralized ionomer.
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Citations
25 Claims
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1. A golf ball comprising:
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an inner core having a specific gravity of less than 1.05 g/cc with a compression of greater than 70; an inner casing layer disposed around the inner core, the inner casing layer having a flexural modulus greater than 30,000 psi, a Shore C hardness greater than 80, and a thickness less than about 0.060 inch; an outer core layer encompassing the inner casing layer, the outer core layer having a flexural modulus of less than 30 kpsi, a Shore C hardness less than 80, a specific gravity of less than 1.05 g/cc, and a thickness less than about 0.050 inch; an outer casing layer having a flex modulus greater than 60 kpsi, a thickness less than about 0.030 inch, and a specific gravity greater than 1.25 g/cc; and an outer cover having a hardness of less than 65 Shore D, and a thickness less than 0.040 inch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A golf ball comprising:
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an inner core having a specific gravity of less than 1.2 g/cc with a compression of less than 70; a thermoplastic inner casing disposed around the inner core, the inner casing having a flexural modulus greater than 30,000 psi, and a thickness of less than 0.10 inch; an outer core layer having a specific gravity of less than 1.10 g/cc, a thickness of less than about 0.15 inch, and a Shore D hardness of at least 30; and an outer cover layer having a Shore D hardness of less than 65, and a thickness of less than 0.04 inch. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification