Patent ID: 8133136

Claim:
A multi-piece solid golf ball comprising a solid core, a cover, at least one intermediate layer interposed therebetween, and a plurality of dimples on a surface of the ball, wherein the respective initial velocities (m/s) of the core, a sphere I composed of the core encased by the intermediate layer, and the golf ball, as measured by a method set forth in the Rules of Golf using an initial velocity measuring apparatus of the same type as a USGA drum rotation-type initial velocity instrument, satisfy formula A below, the respective deflections (mm) of the core, the sphere I composed of the core encased by the intermediate layer, and the golf ball, when compressed under a final load of 130 kgf from an initial load of 10 kgf, satisfy formula B below, and a relationship between the thickness of the intermediate layer and that of the cover layer satisfies formula D below: (initial velocity of core−initial velocity of sphere I ) 2 +(initial velocity of sphere I −initial velocity of golf ball) 2 <0.40; Formula A: 0.30<(deflection of core−deflection of sphere I ) 2 +(deflection of sphere I −deflection of golf ball) 2 <0.70. Formula B: 1.2<intermediate layer thickness/cover thickness<1.7; and Formula D: wherein the cover has a material hardness that is higher than a material hardness of the intermediate layer material hardness, and which satisfies formula C below: 0<[material hardness (Shore D) of intermediate layer ×intermediate layer thickness (mm)]−[material hardness (Shore D) of cover ×cover thickness (mm)]<40. Formula C