Patent ID: 8371960
Filing Date: 2013-02-12
Classification: A63B

Abstract:
1. A multi-piece solid golf ball comprising a core, an envelope encasing the core, an intermediate layer encasing the envelope, and a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples, wherein the surface hardness of the core has a JIS-C hardness value of 40 to 95, the center hardness of the core has a JIS-C hardness value of 30 to 72, and the hardness difference therebetween is from 4 to 20; the envelope is composed of at least two layers; the core is formed primarily of a rubber material; the envelope, intermediate layer and cover are each formed primarily of the same or different resin materials; and the core, a Sphere I composed of the core encased by the envelope layers, a Sphere II composed of the core encased by the envelope layers and the intermediate layer, and a Sphere III composed of the core encased by the envelope layers, the intermediate layer and the cover have JIS-C surface hardness relationships therebetween which satisfy the following condition: