US 6,548,618 B2 · Golf ball having dual core and thin polyurethane cover formed by RIM

Abstract

The present invention is directed to a golf ball comprising a dual core component, an inner cover layer and an outer cover layer. The dual core comprises an interior spherical center component formed from a thermoset material, a thermoplastic material, or combinations thereof. The dual core also comprises a core layer disposed about the center component, formed from a thermoset material, a thermoplastic material, or combinations thereof. The one or more polyurethane layers are preferably formed via a reaction injection molding (RIM) technique. The inner cover layer is relatively soft and preferably comprises an ionomer or ionomer blend. The outer cover layer is relatively hard and comprises a hard polyurethane. The resulting multi-layered golf ball of the present invention provides for enhanced distance without sacrificing playability or durability when compared to known multi-layer golf balls.

Claims42

Dependent claims

A golf ball comprising:

a core center component;
a core layer disposed about said core center component;
an inner cover layer disposed on said core layer, said inner cover layer having a Shore D hardness of less than 45;
and
an outer cover layer disposed on said inner cover layer, said outer cover layer comprising a polyurethane material, said outer cover layer having a Shore D hardness of at least 50 and a thickness of from about 0.0075 to 0.0225 inches.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/843,362Filed 25 Apr 2001 · continuation in part

Priority

1 Jun 1993

Published

US 2002/0028885 A17 Mar 2002

Granted

15 Apr 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification25 codes

C08L 23/08
Homopolymers or copolymers of ethene: copolymers of ethene
A63B 37/0003
Solid balls; Rigid hollow balls; Marbles: golf balls
A63B 37/0031
Physical properties: hardness
A63B 37/0033
Physical properties: thickness

Family

Application08/070,510Parent of this continuation-in-part · filed 1 Jun 1993

Application08/542,793Parent of this continuation-in-part · filed 13 Oct 1995

Application08/556,237Parent of this continuation · filed 9 Nov 1995

Application08/591,046Parent of this continuation-in-part · filed 25 Jan 1996

Application08/631,613Parent of this division · filed 10 Apr 1996

Application60/042,439Us provisional application · filed 28 Mar 1997

Application08/870,585Parent of this continuation-in-part · filed 6 Jun 1997

Application08/926,872Parent of this continuation-in-part · filed 10 Sep 1997

Application09/049,410Parent of this continuation · filed 27 Mar 1998

Application09/562,773Parent of this continuation-in-part · filed 2 May 2000

US 2002/0028885 A1Pre-grant publication · published 7 Mar 2002

US 6,495,633 B1Parent of this continuation-in-part

Application09/562,773Parent of this continuation

US 6,057,403 AParent of this continuation

Application09/049,410Parent of this continuation-in-part

Application08/926,872Parent of this division

US 5,803,831 AParent of this division

Application08/631,613Parent of this continuation-in-part

Application08/870,585Parent of this continuation

Application08/556,237Parent of this continuation-in-part

US 6,548,618 B2This patent

From the US filing history. Foreign family members aren’t listed.

Golf ball having dual core and thin polyurethane cover formed by RIM

Life of this patent

Golf ball having dual core and thin polyurethane cover formed by RIM

Life of this patent

Abstract

Claims42