Patent ID: 7300362

Claim:
A golf ball comprising a solid core, an intermediate layer encasing the core, and an outermost layer cover of urethane which is softer than the intermediate layer, wherein the outermost layer cover has a surface hardness, expressed in JIS-C hardness units, of at least 76 but not more than 88 and a thickness of at least 0.6 mm but not more than 1.0 mm; letting A be the deflection of a sphere composed of the core encased by the intermediate layer when compressed under a final load of 1,275 N (130 kg) from an initial load state of 98 N (10 kgf) and B be the deflection of the core when compressed under a final load of 1,275 N (130 kg) from an initial load state of 98 N (10 kgf), the value A/B is at least 0.74 but not more than 0.82; and the value expressed as (JIS-C surface hardness of intermediate layer×intermediate layer thickness)−(JIS-C surface hardness of cover×cover thickness) is at least 90 but not more than 120.