Golf ball having specific spin, moment of inertia, lift, and drag relationship
View Patent ↗Golf ball with a novel combination of spin rate, lift coefficient, drag coefficients, and optionally moment of intertia: 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.
1. A golf ball comprising a core and cover, wherein the golf ball comprises a moment of inertia of about 0.40 oz/in 2 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 14500 and a spin rate of about 3700 rpm at a ball speed of 120 m/h, 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.
2. The golf ball of claim 1 , wherein the cover has a hardness of about 50 or less.
3. The golf ball of claim 2 , wherein the cover has a hardness of about 45 Shore D to about 55 Shore D.
4. The golf ball of claim 1 , wherein the cover comprises an inner cover layer and an outer cover layer.
5. The golf ball of claim 4 , wherein the inner cover layer has a first hardness and the outer cover layer has a second hardness less than the first hardness.
6. The golf ball of claim 5 , wherein the first hardness is about 60 Shore D or greater and the second hardness is less than about 60 Shore D.
7. The golf ball of claim 1 , wherein the core has a hardness of about 55 Shore D or less.
8. The golf ball of claim 1 , wherein the core comprises polybutadiene and tungsten.
9. The golf ball of claim 8 , wherein the cover comprises an inner cover and an outer cover, and wherein the inner cover comprises a partially or fully neutralized ionomer.
10. A golf ball comprising a core and cover, wherein the golf ball comprises a moment of inertia of about 0.38 oz/in 2 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 at a ball speed of 120 m/h, 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.
11. The golf ball of claim 10 , wherein the cover has a hardness of about 55 or less.
12. The golf ball of claim 10 , wherein the cover comprises an inner cover layer and an outer cover layer.
13. The golf ball of claim 10 , wherein the inner cover layer has a first hardness and the outer cover layer has a second hardness less than the first hardness.
14. The golf ball of claim 13 , wherein the first hardness is about 60 Shore D or greater and the second hardness is less than about 60 Shore D.
15. The golf ball of claim 10 , wherein the moment of inertia is about 0.36 oz/in 2 or less.
16. The golf ball of claim 10 , wherein the cover has a hardness of about 45 Shore D to about 55 Shore D.
17. The golf ball of claim 10 , wherein the core comprises polybutadiene and tungsten.
18. The golf ball of claim 17 , wherein the cover comprises an inner cover and an outer cover, and wherein the inner cover comprises a partially or fully neutralized ionomer.
19. 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/in 2 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 at a ball speed of 120 m/h, 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.
20. The golf ball of claim 19 , wherein the inner cover layer has a hardness of about 60 Shore D or greater.