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Multi-layer golf ball

  • US 8,562,460 B2
  • Filed: 12/02/2009
  • Issued: 10/22/2013
  • Est. Priority Date: 01/10/2008
  • Status: Active Grant
First Claim
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1. A golf ball comprising:

  • an inner core comprising a center formed from a first thermoset composition, wherein the inner core has a diameter of from 1.000 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 having a thickness of from 0.010 inches to 0.070 inches and an outer surface hardness of from 65 Shore D to 95 Shore D and formed from a composition selected from the group consisting of metallic, composite, and inorganic/organic hybrid compositions;

    an outer core layer formed from a second thermoset composition and having a thickness of from 0.010 inches to 0.075 inches and an outer surface hardness of from 45 Shore C to 90 Shore C;

    a first thermoplastic core layer disposed between the inner core and the intermediate core layer and a second thermoplastic core layer disposed between the intermediate core layer and the outer core layer; and

    a cover layer having a thickness of from 0.010 inches to 0.050 inches and formed from a composition having a material hardness of from 30 Shore D to 65 Shore D.

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