IP Library › Granted Patent US 8,840,494
Granted Patent B2
US 8,840,494 · App. 13/751,312 · Granted Sep 23, 2014

Multi-layer golf ball

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Quick Facts
Patent No.
US 8,840,494
App. No.
13/751,312
Granted
Sep 23, 2014
Kind
B2
Abstract

Golf balls consisting of a dual core and a dual cover are disclosed. The dual core consists of an inner core layer formed from a rubber composition and an outer core layer formed from a highly neutralized polymer composition.

Claims (14)

1. A golf ball consisting essentially of:

an inner core layer formed from a rubber composition and having a center hardness of 60 Shore C or greater and an outer surface hardness of 80 Shore C or greater;

an outer core layer having a diameter of from 1.40 inches to 1.59 inches and formed from a highly neutralized polymer composition having a specific gravity of from 0.95 g/cc to 0.99 g/cc and a material hardness of 35 Shore D or greater;

an inner cover layer formed from a thermoplastic composition and having a material hardness of 95 Shore C or less; and

an outer cover layer formed from a composition selected from the group consisting of polyurethanes, polyureas, and copolymers and blends thereof.

2. The golf ball of claim 1 , wherein the outer core layer composition has a modulus within the range of 25,000 psi to 75,000 psi.

3. The golf ball of claim 1 , wherein the outer core layer composition has a moisture vapor transmission rate of 8 g-mil/100 in 2 /day or less.

4. The golf ball of claim 1 , wherein the center hardness of the inner core layer is from 60 Shore C to 80 Shore C.

5. The golf ball of claim 1 , wherein the outer surface hardness of the inner core layer is from 80 Shore C to 90 Shore C.

6. The golf ball of claim 1 , wherein the material hardness of the outer core layer composition is 45 Shore D or greater.

7. The golf ball of claim 1 , wherein the outer cover has a surface hardness of from 40 Shore D to 65 Shore D.

8. The golf ball of claim 1 , wherein a sphere formed from the outer core layer composition has a compression of from 70 to 110.

9. The golf ball of claim 1 , wherein the outer core layer has a diameter of from 1.51 inches to 1.56 inches.

10. The golf ball of claim 1 , wherein the outer core layer has a diameter of from 1.52 inches to 1.56 inches.

Assignments (5)
ASSIGNMENT OF SECURITY INTEREST IN PATENTS (ASSIGNS 039506-0030) Recorded Aug 3, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS RESIGNING ADMINISTRATIVE AGENT
To: JPMORGAN CHASE BANK, N.A., AS SUCCESSOR ADMINISTRATIVE AGENT
Reel/Frame 061521/0414 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (031935/0395) Recorded Sep 7, 2016
From: KOREA DEVELOPMENT BANK, NEW YORK BRANCH
To: ACUSHNET COMPANY
Reel/Frame 039939/0427 →
SECURITY INTEREST Recorded Jul 28, 2016
From: ACUSHNET COMPANY
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
Reel/Frame 039506/0030 →
SECURITY AGREEMENT Recorded Jan 7, 2014
From: ACUSHNET COMPANY
To: KOREA DEVELOPMENT BANK, NEW YORK BRANCH
Reel/Frame 031935/0395 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 5, 2013
From: SULLIVAN, MICHAEL J; LADD, DEREK A.; MORGAN, WILLIAM E.; BOEHM, HERBERT C.
To: ACUSHNET COMPANY
Reel/Frame 029754/0025 →