Multi-layer core golf ball
View Patent ↗Golf balls comprising a multi-layer core and a cover are disclosed. The multi-layer core comprises at least one intermediate core layer formed from a metallic, composite, or inorganic/organic hybrid composition.
1. A golf ball comprising:
an inner core comprising a center formed from a first thermoplastic composition, wherein the inner core has a diameter of from 1.000 inches to 1.580 inches, a center hardness of from 40 Shore C to 70 Shore C, and a surface hardness of from 50 Shore C to 95 Shore C;
an intermediate core layer having a thickness of from 0.010 inches to 0.070 inches and a surface hardness of from 65 Shore D to 95 Shore D and formed from a composition selected from the group consisting of metallic, composite, and inorganic/organic hybrid compositions;
an outer core layer formed from a second thermoplastic composition and having a thickness of from 0.010 inches to 0.075 inches and a surface hardness of from 45 Shore C to 90 Shore C; and
a cover layer having a thickness of from 0.010 inches to 0.050 inches and formed from a composition having a material hardness of from 30 Shore D to 65 Shore D.
2. The golf ball of claim 1 , wherein the diameter of the inner core is from 1.400 inches to 1.490 inches.
3. The golf ball of claim 1 , wherein the outer surface hardness of the intermediate core layer is from 75 Shore D to 95 Shore D.
4. The golf ball of claim 1 , wherein the inner core comprises an additional inner core layer.
5. The golf ball of claim 4 , wherein the additional inner core layer is formed from a thermoset composition.
6. The golf ball of claim 4 , wherein the additional inner core layer is formed from a thermoplastic composition.
7. The golf ball of claim 1 , wherein the golf ball additionally comprises a thermoset core layer disposed between the intermediate core layer and the outer core layer.
8. The golf ball of claim 1 , wherein the golf ball additionally comprises a first thermoset core layer disposed between the inner core and the intermediate core layer and a second thermoset core layer disposed between the intermediate core layer and the outer core layer.
9. A golf ball comprising:
a core consisting of:
an inner core layer formed from a first thermoplastic composition and having a diameter of from 1.000 inches to 1.580 inches, a center hardness of from 40 Shore C to 70 Shore C, and a surface hardness of from 50 Shore C to 95 Shore C;
an intermediate core layer having a thickness of from 0.010 inches to 0.070 inches and a surface hardness of from 65 Shore D to 95 Shore D and formed from a composition selected from the group consisting of metallic, composite, and inorganic/organic hybrid compositions;
a first outer core layer formed from a second thermoplastic composition; and
a second outer core layer formed from a thermoset composition and having a thickness of from 0.010 inches to 0.075 inches and a surface hardness of from 45 Shore C to 90 Shore C; and
a cover layer having a thickness of from 0.010 inches to 0.050 inches and formed from a composition having a material hardness of from 30 Shore D to 65 Shore D.