Golf ball having specific spin, moment of inertia, lift, and drag relationship
AssigneeAcushnet Company
InventorsMichael J. Sullivan, Derek A. Ladd, Edmund A. Hebert, Laurent Bissonnette
Life of this patent
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Abstract
Golf ball with a novel combination of spin rate, lift coefficient, drag coefficients, and optionally moment of inertia: a golf ball with a low spin rate, a high lift coefficient, a low drag coefficient, and optionally a high moment of inertia; and a golf ball with a high spin rate, a low lift coefficient, a low drag coefficient, and optionally a low moment of inertia.
Claims32
A golf ball consisting of a foamed core, an intermediate layer, and a cover, wherein the intermediate layer is cast from polyurethane or polyurea, and wherein the golf ball comprises a moment of inertia of about 0.46 oz/in2 or greater, a lift coefficient greater than about 0.20, and a drag coefficient less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3100 rpm, and wherein the core has a compression of about 70 or less and the cover has a hardness of about 60 Shore D or greater.
A golf ball consisting of a foamed core, an intermediate layer, and a cover, wherein the golf ball comprises a moment of inertia of about 0.48 oz/in2 or greater, a lift coefficient greater than about 0.20, and a drag coefficient less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3100 rpm.
A golf ball consisting of a foamed core, an intermediate layer formed from a composition comprising polyurethane, polyurea, or a combination thereof, and a cover, wherein the golf ball comprises a moment of inertia of about 0.46 oz/in2 or greater, a lift coefficient greater than about 0.20, and a drag coefficient less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3100 rpm.
A golf ball consisting of a foamed core, an intermediate layer, and a cover, wherein the intermediate layer has a specific gravity of less than about 0.8, and wherein the golf ball comprises a moment of inertia of about 0.46 oz/in2 or greater, a lift coefficient greater than about 0.20, and a drag coefficient less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3100 rpm.
A golf ball consisting of a foamed core, an intermediate layer, and a cover, wherein the intermediate layer has a specific gravity of less than about 0.8 and is cast from polyurethane or polyurea comprising hollow spheres, and wherein the golf ball comprises a moment of inertia of about 0.46 oz/in2 or greater, a lift coefficient greater than about 0.20, and a drag coefficient less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3100 rpm, and wherein the core has a compression of about 70 or less and the cover has a hardness of about 60 Shore D or greater.
Dependencies are inferred from the claim text.