Patent ID: 6379267
Filing Date: 2002-04-30
Classification: A63B

Abstract:
A golf ball comprising a core and a cover of at least two layers around the core including a cover outermost layer which is formed with a plurality of dimples, whereinsaid cover outermost layer has a Shore D hardness of 30 to less than 51, the product (AÃ—B) of the Shore D hardness of said cover outermost layer, represented by B, multiplied by the Shore D hardness of a cover layer disposed inside and contiguous to said cover outermost layer, represented by A, is in the range of 1,000 to 3,500, the plurality of dimples include at least three types of dimples which are different in diameter and have an average diameter (AD) and an average depth (AP) wherein the ratio (AD/AP) of the average diameter to the average depth is from 17/1 to 26/1, the overall dimple volume which is the sum of the volumes of all dimple spaces each defined below a plane circumscribed by a dimple edge is in the range of 280 to 390 mm3, and wherein the product of (AÃ—B) of the Shore D hardness B of said cover outermost layer multiplied by the Shore D hardness A of a cover layer disposed inside and contiguous to said cover outermost layer and the overall dimple volume (Vs) are correlated such that Vs becomes smaller when AÃ—B has a large value, and Vs becomes greater when AÃ—B has a small value.