Patent ID: 8777779

Claim:
A golf ball comprising a core, a mid layer positioned outside the core, and a cover positioned outside the mid layer, the core comprising a center and an envelope layer positioned outside the center, wherein the ratio of the volume Ve of the core to the volume of a phantom sphere of the golf ball is equal to or greater than 76%, the ratio (Co/Do) of the amount of compressive deformation Co of the center, which is measured under conditions of an initial load of 98 N and a final load of 294 N, to the diameter Do of the center is equal to or greater than 0.085 but equal to or less than 0.130, the ratio (Ce/De) of the amount of compressive deformation Ce of the core, which is measured under conditions of an initial load of 98 N and a final load of 294 N, to the diameter De of the core is equal to or greater than 0.015 but equal to or less than 0.020, and the ratio (Vo/Ve) of the volume Vo of the center to the volume Ve is equal to or greater than 0.01 but equal to or less than 0.13.