Granted Patent B2

US 9,795,834 · App. 15/361,626 · Granted Oct 24, 2017

Inventors: Michael J. Sullivan (Old Lyme, CT); Derek A. Ladd (Acushnet, MA); Edmund A. Hebert (Mattapoisett, MA); Douglas E. Jones (Dartmouth, MA)

Assignee: Acushnet Company

A63B37/0051A63B37/008A63B37/0039A63B37/0043A63B37/0045A63B37/0049A63B37/0062A63B37/0063A63B37/0064A63B37/0069A63B37/0072A63B37/0074A63B37/0075A63B37/0076A63B37/0077A63B37/0083A63B37/0084A63B37/0087A63B37/0092A63B37/0096C08L75/04A63B37/0031C08L21/00C08L23/0876

Abstract

Claims (13)

1. A golf ball consisting essentially of:

(a) a center having a diameter of from 0.50 inches to 1.30 inches, a center hardness of 50 Shore C or greater, and formed from a center composition comprising a highly neutralized ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer wherein at least 80% of the acid groups of the acid copolymer are neutralized;

(b) an outer core layer having a surface hardness of 75 Shore C or greater and formed from an outer core layer composition comprising a highly neutralized ethylene/(meth)acrylic acid copolymer wherein 40% to 100% of the acid groups present in the outer core layer composition are neutralized;

(c) an inner cover layer formed from a thermoplastic composition and having a material hardness less than the surface hardness of the outer core layer; and

(d) an outer cover layer;

wherein the modulus of the highly neutralized copolymer of the center composition is at least 10% less than the modulus of the highly neutralized copolymer of the outer core layer composition.

2. The golf ball of claim 1 , wherein the surface hardness of the outer core layer is at least 20 Shore C units greater than the center hardness.

3. The golf ball of claim 1 , wherein the outer cover layer has a material hardness less than the surface hardness of the outer core layer.

4. The golf ball of claim 1 , wherein the center has a center hardness of from 55 Shore C to 70 Shore C.

5. The golf ball of claim 1 , wherein the surface hardness of the outer core layer is 85 Shore C or greater, and the inner cover layer has a material hardness of 90 Shore C or less.

6. The golf ball of claim 1 , wherein the surface hardness of the outer core layer is 90 Shore C or greater, and the inner cover layer has a material hardness of 90 Shore C or less.

7. The golf ball of claim 1 , wherein the core has an overall dual core compression of from 75 to 90.

8. The golf ball of claim 1 , wherein the core has an overall dual core diameter of from 1.52 inches to 1.59 inches.

Assignments (4)

Continuity (27)