Multilayer golf ball

• US 5,810,678 A
• Filed: 11/08/1996
• Issued: 09/22/1998
• Est. Priority Date: 06/07/1995
• Status: Expired due to Term

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Dalton, Jeffrey L., Cavallaro, Christopher, Boehm, Herbert C., Rajagopalan, Murali, Harris, Kevin M., Pasqua, Samuel A. Jr.
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US08/746,362
• Time in Patent Office: 683 Days
• Field of Search: 473/373, 473/374, 473/375, 473/376, 473/365, 473/378
• US Class Current: 473/373
• CPC Class Codes: A63B 37/0003 Golf balls
• CPC Class Codes: A63B 37/0035 Density; Specific gravity
• CPC Class Codes: A63B 37/0037 Flexural modulus; Bending stiffness
• CPC Class Codes: A63B 37/0064 Diameter
• CPC Class Codes: A63B 37/0065 Deflection or compression
• CPC Class Codes: A63B 37/0066 Density; Specific gravity
• CPC Class Codes: A63B 37/0075 Three piece balls, i.e. cover, intermediate layer and core
• CPC Class Codes: B29C 2043/3644 Vacuum bags; Details thereof, e.g. fixing or clamping
• CPC Class Codes: B29C 43/305 Making multilayered articles
• CPC Class Codes: C08L 9/00 Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Abstract

The present invention is directed towards a multilayer golf ball which comprises a core; at least one cover layer; and one or more mantle layers disposed between the core and cover layer. The core has a compression of less than 70 points and a specific gravity less than 1.18. The mantle layer has a specific gravity of greater than 1.2. As a result, the ball of the present invention is a "soft" feeling distance ball.

Claims

1. A golf ball comprising:

(a) a core having a compression of less than 70 points and a specific gravity of less than 1.18;

(b) a cover layer; and

(c) a mantle layer of a non-wound construction disposed between the core and cover layer, the mantle layer having a specific gravity of greater than 1.2.

2. The golf ball of claim 1, wherein the cover has a specific gravity greater than about 1.2.

3. The golf ball of claim 1 or 2, wherein the ball has a weight greater than about 1.6 ounces.

4. The golf ball of claim 3, wherein the ball has a compression of less than 90 points.

5. The golf ball of claim 3, wherein the mantle layer has a flexural modulus of less than about 10,000 psi.

6. The golf ball of claim 5, wherein the mantle layer has a flexural modulus of less than about 5,000 psi.

7. The golf ball of claim 3, wherein the cover has a flexural modulus of greater than about 75,000 psi.

8. The golf ball of claim 3, wherein the core has a diameter greater than about 1.3 inches.

9. The golf ball of claim 8, wherein the mantle layer has a thickness of about 0.04 to 0.08 inches and the cover has a thickness of about 0.06 to 0.1 inches.

17. The golf ball of claim 1 or 10 wherein the mantle layer comprises a polymer selected from the group of thermoplastic copolyetherester block copolymer, thermoplastic copolyesterester block copolymer, thermoplastic polyurethane and thermoset polyurethane and a filler selected from the group of barium sulfate, zinc oxide, titanium dioxide and combinations thereof.

10. A golf ball comprising:

(a) a core formed from a mixture comprising polybutadiene and calcium oxide and having a compression of less than 70 points;

(b) a cover layer; and

(c) a mantle layer of a non-wound construction disposed between the core and cover layer, the mantle layer having a specific gravity of greater than 1.2.

11. The golf ball of claim 10, wherein the cover has a specific gravity greater than about 1.2.

12. The golf ball of claim 10 or 11, wherein the ball has a weight of greater than about 1.6 ounces.

13. The golf ball of claim 12, wherein the core has a diameter greater than about 1.3 inches and a specific gravity of less than about 1.18.

14. The golf ball of claim 12, wherein the mantle layer has a thickness of about 0.04 to 0.08 inches and the cover has a thickness of about 0.06 to 0.1 inches.

15. The golf ball of claim 14, wherein the mantle layer has a flexural modulus of less than about 10,000 psi.

16. The golf ball of claim 15, wherein the cover has a flexural modulus of greater than about 75,000 psi.

18. The golf ball of claim 10, wherein the core, mantle layer and cover are configured such that the ball compression is less than 90 points.