Patent ID: RE42393

Claim:
A two-piece solid golf ball comprising a solid core and a cover having a surface formed with a plurality of dimples, wherein the solid core has JIS-C hardnesses at its center and its surface, the JIS-C hardness at the core surface minus the JIS-C hardness at the core center is from 22 to 30 units, the cover has a gage of 1.3 to 2 mm and a Shore D hardness of up to 55, and has a JIS-C hardness at its surface, the JIS-C hardness at the cover surface minus the JIS-C hardness at the core surface is 17 to −5 units, the total number of dimples is 360 to 492, and the percent dimple volume V R is from 0.74% to 0.84%, wherein V R is defined as a proportion (%) of the sum of all dimple volumes, each dimple volume defined below a plane circumscribed by the dimple edge, to the overall volume of a phantom golf ball that is free of dimples.