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.
Claims20
A golf ball comprising a core and cover, wherein the golf ball comprises a moment of inertia of about 0.40 oz/in2 or less, the lift coefficient is less than about 0.20, and the drag coefficient is less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3700 rpm, wherein the cover has a hardness of about 60 Shore D or less, wherein the core has an atti compression of about 80 or more and a Shore D hardness of about 65 or less, and wherein the golf ball has a coefficient of restitution of greater than about 0.80.
A golf ball comprising a core and cover, wherein the golf ball comprises a moment of inertia of about 0.38 oz/in2 or less, the lift coefficient is less than about 0.20, and the drag coefficient is less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3700 rpm, and a coefficient of restitution of greater than 0.80, wherein the core has an atti compression of about 80 or more and a hardness of about 55 Shore D or less, and wherein the cover has a hardness of about 60 Shore D or less.
A golf ball comprising a core and cover, wherein the cover comprises an inner cover layer and an outer cover layer, wherein the golf ball comprises a moment of inertia of about 0.40 oz/in2 or less, the lift coefficient is less than about 0.20, and the drag coefficient is less than about 0.22 at a Reynolds Number of about 145000 and a spin rate of about 3700 rpm, wherein the outer cover has a flexural modulus of about 65,000 psi or less, wherein the inner cover layer has a hardness greater than the outer cover layer, wherein the core has an atti compression of about 80 or more and a Shore D hardness of about 65 or less, and wherein the golf ball has a coefficient of restitution of greater than about 0.80.
Dependencies are inferred from the claim text.