GOLF BALL INCORPORATING AN INNERMOST ASPHERICAL HOLLOW PORTION

摘要

Golf ball comprising a core and a cover, the core comprising: an innermost aspherical hollow portion having volume Vahp; a shell layer formed from thermoplastic/thermoset composition and having inner surface comprising plurality of symmetrically spaced extensions that border and define the shape of the innermost aspherical hollow portion; the plurality of extensions and innermost aspherical hollow portion, combined, forming a phantom sphere having diameter of about 0.15-1.1 inches; the plurality of extensions having combined volume ETV such that Vahp≧ETV>0.20 (ETV+Vahp); and at least one thermoset/thermoplastic outer core layer disposed about the shell layer. The cover may comprise one or more layers. In one embodiment, the plurality of symmetrically spaced extensions border and define the shape of the innermost aspherical hollow portion, and the volume of the innermost aspherical hollow portion is about 2% to about 30% of a total volume of the golf ball.

主权项

1. A golf ball comprising:
a core comprising:
an innermost aspherical hollow portion having a volume Vahp;surrounded by a shell layer that is formed from a thermoplastic composition and has an inner surface comprising a plurality of symmetrically spaced extensions that border and define a shape of the innermost aspherical hollow portion;
wherein the plurality of extensions and innermost aspherical hollow portion, combined, form a phantom sphere having a diameter of from about 0.15 inches to about 1.1 inches; andwherein the plurality of extensions have a combined total volume ETV such that Vahp≧ETV>0.20 (ETV+Vahp); andat least one outer core layer disposed about the shell layer; and at least one cover layer disposed about the outer core layer; wherein the inner surface has an inner surface hardness and the shell layer has an outer surface having an outer surface hardness greater than the inner surface hardness by about 0 to 5 Shore C to define a first hardness gradient; and wherein the outer core layer has a second hardness gradient.