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US 8,944,938 B2Granted
Golf ball having a resilient material
AssigneeNIKE, Inc.
InventorYasushi Ichikawa
Life of this patent
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Abstract
A rebound resilient golf ball having one or more core layers, a cover surrounding the core layer or layers, and optionally a mantle layer positioned between the cover and the core layer or layers. At least one of the layers of the golf ball includes a material whose resilience increases as the hardness of the material increases.
Claims9
A method of manufacturing a golf ball comprising:
- forming a core layer, wherein the core layer is made from a first material;
- forming a mantle layer, wherein the mantle layer substantially surrounds the core layer, and wherein the mantle layer is made from a second material;
- forming a cover layer, wherein the cover layer substantially surrounds the core layer, and wherein the cover layer is made from a third material;
- wherein the third material comprises a resilient material,
- wherein the resilient material has a resilience value and a hardness value, and wherein the resilient material is thermoplastic polyurethane formed from one or more polyisocyanate monomers and one or more hyper branched polyols having a hydroxy valence of from about 2.1 to about 36, and
- wherein the resilient material is formed by curing the mixture to form a product;
- wherein the method further comprises grinding the product at a temperature from about 0° C. to about 50° C. to form a ground product;
- and wherein forming the cover layer comprises extruding or injection molding the ground product.
5 more elements
Dependencies are inferred from the claim text.