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US 7,841,955 B2Granted
Multi-layer core golf ball
AssigneeAcushnet Company
InventorsMichael J. Sullivan, Derek A. Ladd
Life of this patent
Estimating the term…
Abstract
Golf balls consisting of a multi-layer core and a cover are disclosed. The multi-layer core consists of a rubber center and a rubber outer core layer that are both soft relative to a hard, thermoplastic intermediate core layer.
Claims14
A golf ball comprising:
- a center formed from a first rubber composition and having a diameter of from 1.00 inches to 1.58 inches and a center hardness of from 35 Shore C to 70 Shore C;
- an intermediate core layer formed from a thermoplastic composition and having a surface hardness of 40 Shore C or greater;
- an outer core layer formed from a second rubber composition and having a surface hardness of 45 Shore C or greater;
- and
- a cover layer having a surface hardness of 60 Shore D or greater;
- the intermediate core layer having a surface hardness that is greater than both center hardness of the center and surface hardness of the outer core layer;
- and wherein the center, the intermediate core layer, and the outer core layer each have a specific gravity of from 1.05 g/cc to 1.25 g/cc.
4 more elements
Dependencies are inferred from the claim text.