×

Multi-layer core golf ball

  • US 8,162,777 B2
  • Filed: 07/11/2011
  • Issued: 04/24/2012
  • Est. Priority Date: 01/10/2008
  • Status: Active Grant
First Claim
Patent Images

1. 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 75 Shore C, a surface hardness of from 50 Shore C to 95 Shore C, and a positive hardness gradient wherein the difference between the center hardness and the surface hardness of the center is from 10 to 45 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 greater than 50 Shore D;

    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 50 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 less;

    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.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×