Method of making a golf ball with a multi-layer core
First Claim
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1. A golf ball comprising:
- a) a center comprised of a first polybutadiene rubber having a first hardness and having a diameter of at least 1 inch;
b) a first layer surrounding the center, comprised of a second material and having a second hardness and a thickness of less than 0.1 inch;
c) a second layer surrounding the first layer, comprised of a third material and having a third hardness and a thickness of less than 0.1 inch;
d) a third layer surrounding the second layer, comprised of a fourth material and having a fourth hardness and a thickness of less than 0.1 inch; and
e) a cover of a cover material surrounding the third layer;
wherein each of the first, second and third layers is a solid layer.
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Abstract
An improved golf ball comprising a center having a first hardness, a first layer surrounding the center, comprised of a second material, a second layer surrounding the first layer, comprised of a third material, a third layer surrounding the second layer, comprised of a fourth material, and a cover of a cover material surrounding the third layer wherein each layer has a different hardness.
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Citations
16 Claims
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1. A golf ball comprising:
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a) a center comprised of a first polybutadiene rubber having a first hardness and having a diameter of at least 1 inch;
b) a first layer surrounding the center, comprised of a second material and having a second hardness and a thickness of less than 0.1 inch;
c) a second layer surrounding the first layer, comprised of a third material and having a third hardness and a thickness of less than 0.1 inch;
d) a third layer surrounding the second layer, comprised of a fourth material and having a fourth hardness and a thickness of less than 0.1 inch; and
e) a cover of a cover material surrounding the third layer;
wherein each of the first, second and third layers is a solid layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
a) the second hardness is different from the first polybutadiene rubber;
b) the third hardness is different from the first polybutadiene rubber and the second hardness;
c) the fourth hardness is different from the first polybutadiene rubber, the second hardness and the third hardness; and
d) the cover material has a fifth hardness different from the first polybutadiene rubber, the second hardness, the third hardness and the fourth hardness.
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3. The golf ball of claim 2, wherein each of the first, second and third layers has a thickness less than 0.05 inch.
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4. The golf ball of claim 3, wherein the center has a diameter of about 1.25 to 1.45 inch.
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5. The golf ball of claim 4 wherein the center, the first, second and third layer materials and the cover material are selected so that the ball has a compression of less than 85.
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6. The golf ball of claim 5, wherein the ball has a compression of less than 80.
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7. The golf ball of claim 5, wherein:
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a) the center has a Shore C hardness at a center point thereof of less than 70;
b) the first layer is harder than the center;
c) the second layer is harder than the first layer; and
d) the third layer is harder than the second layer.
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8. The golf ball of claim 5, wherein:
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a) the first layer has a Shore C hardness of 70 to 75;
b) the second layer has a Shore C hardness of 72 to 77; and
c) the third layer has a Shore C hardness of 75 to 80.
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9. The golf ball of claim 7, wherein the cover has a Shore D hardness of less than 60.
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10. The golf ball of claim 4, wherein the center has a Shore C hardness of greater than 75.
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11. The golf ball of claim 10, wherein:
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a) the first layer is softer than the center;
b) the second layer is softer than the first layer; and
c) the third layer is softer than the second layer.
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12. The golf ball of claim 11, wherein:
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a) the first layer has a Shore C hardness of 75 to 72;
b) the second layer has a Shore C hardness of about 73 to 70; and
c) the third layer has a Shore C hardness of less than about 70.
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13. The golf ball of claim 1, wherein at least one of the first, second, third and fourth materials are thermoset materials.
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14. The golf ball of claim 1, wherein at least one of the first, second, third, and fourth materials comprises a polybutadiene rubber.
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15. A golf ball comprising:
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a) a solid center comprised of a first polybutadiene rubber having a first hardness;
b) a solid first layer surrounding the center, comprised of a second polybutadiene rubber material and having a thickness of less than 0.1 inch;
c) a solid second layer surrounding the first layer, comprised of a third polybutadiene rubber material and having a thickness of less than 0.1 inch;
d) a solid third layer surrounding the second layer, comprised of a fourth polybutadiene rubber material and having a thickness of less than 0.1 inch; and
e) a cover of a cover material surrounding the third layer. - View Dependent Claims (16)
a) the second material hardness has a different hardness from the first polybutadiene rubber;
b) the third material has a different hardness from the first polybutadiene rubber and the second material;
c) the fourth material has a different hardness from the first polybutadiene rubber, the second material and the third material; and
d) the cover material has a different hardness from the first polybutadiene rubber, the second material, the third material, and the fourth material.
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Specification