Multi-layer core golf ball
First Claim
Patent Images
1. A golf ball comprising a core and a cover, wherein the core consists essentially of:
- a solid inner core layer formed from an unfoamed composition and having a diameter of 1.10 inches or less, a center Shore C hardness (Hcenter) of 15 or less, an interface Shore C hardness (Hinner core interface) of from 5 to 15, and a hardness gradient wherein the interface Shore C hardness of the inner core layer is within 1 Shore C unit of the center Shore C hardness; and
an outer core layer having a thickness of 0.20 inches or greater, an inner surface Shore C hardness (Houter core inner surface) of from 40 to 75, and an outer surface Shore C hardness (Houter surface) of 80 or greater;
wherein Houter surface−
Hcenter≥
70;
wherein the inner core layer has a hardness gradient slope (Sinner core) defined as
4 Assignments
0 Petitions
Accused Products
Abstract
Golf balls having a very high positive gradient multilayer core are provided. The multilayer core includes an outer core layer and a very soft, low compression inner core layer. The inner core layer is formed from an unfoamed composition and has a center hardness that is at least 40 Shore C points less than the outer surface hardness of the outer core layer.
-
Citations
14 Claims
-
1. A golf ball comprising a core and a cover, wherein the core consists essentially of:
-
a solid inner core layer formed from an unfoamed composition and having a diameter of 1.10 inches or less, a center Shore C hardness (Hcenter) of 15 or less, an interface Shore C hardness (Hinner core interface) of from 5 to 15, and a hardness gradient wherein the interface Shore C hardness of the inner core layer is within 1 Shore C unit of the center Shore C hardness; and an outer core layer having a thickness of 0.20 inches or greater, an inner surface Shore C hardness (Houter core inner surface) of from 40 to 75, and an outer surface Shore C hardness (Houter surface) of 80 or greater; wherein Houter surface−
Hcenter≥
70;wherein the inner core layer has a hardness gradient slope (Sinner core) defined as - View Dependent Claims (2, 3, 4, 5)
-
-
6. A golf ball comprising a core and a cover, wherein the core consists essentially of:
-
a solid inner core layer formed from an unfoamed composition and having a diameter of 1.30 inches or less, a center Shore C hardness (Hcenter) of 40 or less, an interface Shore C hardness (Hinner core interface) of from 5 to 40, and a hardness gradient wherein the interface Shore C hardness of the inner core layer is within 1 Shore C unit of the center Shore C hardness; and an outer core layer having a thickness of 0.10 inches or greater, an inner surface Shore C hardness (Houter core inner surface) of from 40 to 75, and an outer surface Shore C hardness (Houter surface) of 80 or greater; wherein Houter surface−
Hcenter≥
40; andwherein the inner core layer has a hardness gradient slope (Sinner core) defined as - View Dependent Claims (7, 8, 9, 10)
-
-
11. A golf ball comprising a core and a cover, wherein the core consists essentially of:
-
a solid inner core layer formed from an unfoamed composition and having a diameter of 1.10 inches or less, a center Shore C hardness (Hcenter) of 40 or less, an interface Shore C hardness (Hinner core interface) of from 5 to 40, and a hardness gradient wherein the interface Shore C hardness of the inner core layer is within 1 Shore C unit of the center Shore C hardness; and an outer core layer having a thickness of 0.20 inches or greater, an inner surface Shore C hardness (Houter core inner surface) of from 40 to 75, and an outer surface Shore C hardness (Houter surface) of 80 or greater; wherein Houter surface−
Hcenter≥
40; andwherein the inner core layer has a hardness gradient slope (Sinner core) defined as - View Dependent Claims (12, 13, 14)
-
Specification