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US 6,149,536 AGranted
Multi-layer ionomeric golf ball containing filler and method of the same
AssigneeSpalding Sports Worldwide, Inc.
InventorsMichael J. Sullivan, Mark L. Binette
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a multi-layer golf ball having a core, an inner cover layer comprising an ionomer and a filler and having Shore D hardness of about 65 or less, and an outer cover layer comprising an ionomer and having a Shore D hardness of at least 60. The outer cover layer is harder than the inner cover layer. The sum of the thickness of the inner cover layer and the thickness of the outer cover layer is greater than 0.090 inches. A method of making the golf ball also is disclosed.
Claims25
A golf ball, comprising:
- a core,
- an inner cover layer comprising at least 50 parts by weight ionomer having an average weight % acid content of about 15 or less which is at least 10% neutralized and having a Shore D hardness of about 65 or less, and
- an outer cover layer comprising at least 50 parts by weight ionomer having an average weight % acid of at least about 16 which is at least 10% neutralized, the outer cover layer being harder than the inner cover layer and having a Shore D hardness of at least about 60,
- the sum of the thickness of the inner cover layer and the thickness of the outer cover layer being at least 0.090 inches.
1 more element
A golf ball comprising:
- a core,
- an inner cover layer comprising at least 50 parts by weight ionomer having an average weight % acid content of about 15 or less which is at least 10% neutralized and having a Shore D hardness of no more than about 65, and
- an outer cover layer comprising at least 50 parts by weight ionomer having an average weight % acid of at least about 16 which is at least about 10% neutralized, having a Shore D hardness of at least 60, and being harder than the inner layer,
- wherein the golf ball has a PGA compression of no more than about 110 and a coefficient of restitution of at least 0.780, and the ratio of the diameter of the ball to the sum of the thickness of the inner cover layer and the thickness of the outer cover layer is less than 19:1.
1 more element
A method of making a multi-layer golf ball, comprising:
- obtaining a golf ball core,
- forming an inner cover layer over the core, the inner cover layer comprising at least 50 parts by weight ionomer having an average weight % acid of about 15 or less which is at least 10% neutralized and having a Shore D hardness of about 65 or less, and
- forming an outer cover layer over the inner cover layer, the outer cover layer comprising at least 50 parts by weight ionomer having at least about 16 which is at least about 10% neutralized, having a Shore D hardness of at least about 60 and being harder than the inner cover layer, the combined thickness of the inner cover layer and the outer cover layer being at least 0.090 inches.
Dependencies are inferred from the claim text.