Multi-layer core golf ball
First Claim
Patent Images
1. A golf ball comprising a core and a cover, wherein the core consists of:
- a solid inner core layer formed from an unfoamed first polybutadiene composition and having a diameter of 1.10 inch or less and a center Shore C hardness (Hcenter) of 40 or less,one or more optional intermediate core layers, andan outer core layer formed from a second polybutadiene composition and having a thickness of 0.150 inches or greater and an outer surface Shore C hardness (Houter surface) of 80 or greater,wherein Houter surface>
Hcenter, and Houter surface−
Hcenter≧
40, andwherein the core has a gradient quotient, Q, of from 7 to 12, as defined by the equation;
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Abstract
Golf balls having a very high positive gradient multilayer core are provided. The multilayer core includes an outer core layer and a very soft, low compression inner core layer. The inner core layer is formed from an unfoamed composition and has a center hardness that is at least 40 Shore C points less than the outer surface hardness of the outer core layer.
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Citations
20 Claims
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1. A golf ball comprising a core and a cover, wherein the core consists of:
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a solid inner core layer formed from an unfoamed first polybutadiene composition and having a diameter of 1.10 inch or less and a center Shore C hardness (Hcenter) of 40 or less, one or more optional intermediate core layers, and an outer core layer formed from a second polybutadiene composition and having a thickness of 0.150 inches or greater and an outer surface Shore C hardness (Houter surface) of 80 or greater, wherein Houter surface>
Hcenter, and Houter surface−
Hcenter≧
40, andwherein the core has a gradient quotient, Q, of from 7 to 12, as defined by the equation; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A golf ball comprising a core and a cover, wherein the core consists of:
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a solid inner core layer formed from an unfoamed first polybutadiene composition and having a diameter of 1.10 inch or less and a center Shore C hardness (Hcenter) of 30 or less, one or more optional intermediate core layers, and an outer core layer formed from a second polybutadiene composition and having a thickness of 0.150 inches or greater and an outer surface Shore C hardness (Houter surface) of 80 or greater, wherein Houter surface≧
Hcenter, and Houter surfac−
Hcenter≧
50, andwherein the core has a gradient quotient, Q, of from 7 to 12, as defined by the equation; - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification