Patent ID: 6468169
Filing Date: 2002-10-22
Classification: A63B

Abstract:
A multi-piece solid golf ball comprising; a core consisting of an inner sphere and an enclosure layer surrounding the inner sphere and a cover surrounding the enclosure layer, said cover consisting of an outer layer and an inner layer, the outer layer of said cover having a hardness in the range of 40 to 60 in Shore D and a gage in the range of 1.5 to 3.0 mm, the inner layer of said cover having a hardness in the range of 55 to 70 in Shore D and a gage in the range of 0.5 to 3.0 mm, said enclosure layer having a surface hardness higher than the surface hardness of said inner sphere by 5 to 55 in Shore D, said inner sphere having a distortion of 3.0 to 8.0 mm under an applied load of 100 kg to the outer surface of said inner sphere, and the ratio of a hardness A of said inner sphere to a hardness B of the golf ball, both expressed by a distortion under an applied load of 100 kg, is in the range: 1.1.&lE;A/B&lE;3.5.