Patent ID: 6379270
Filing Date: 2002-04-30
Classification: A63B

Abstract:
A golf ball comprising: a solid core, an intermediate layer, and a cover, wherein the cover is provided with a plurality of protrusions penetrating into the intermediate layer, the protrusions are spaced apart a distance X (mm) from each other and have a length L (mm), and those protrusions satisfying L&lE;X&lE;5L account for at least 60% of the entire protrusions, and said plurality of protrusions has a higher hardness than the intermediate layer, with a hardness difference being at least 6 Shore D hardness units, and a ratio of the protrusion length to an intermediate layer thickness is 0.6 to 1.0, wherein a material of said cover is selected from a group consisting of:ionomer resins, polyurethane resins, polyester resins, and balata rubber.