Patent ID: 8021249

Claim:
A two-piece solid golf ball comprising a solid core and a cover which encases the core and has formed on an outside surface thereof a plurality of dimples, wherein the solid core has a diameter of from 35 to 44 mm, a deflection when compressed under a final load of 130 kgf from an initial load of 10 kgf of from 2.0 to 6.0 mm, and a surface hardness in Shore D units of from 25 to 65; the cover has a thickness of from 0.5 to 5.0 mm and a material hardness in Shore D units of from 30 to 70; and the number of dimples is from 250 to 500, the dimples have a surface coverage (SR) of at least 70% and a volume ratio (VR) of at least 1.0%, are of at least three types and have an average depth of at least about 0.18 mm and a diameter-to-depth ratio (DM/DP) of not more than about 23; and the ball has a coefficient of lift CL at a Reynolds number of 70,000 and a spin ratio of 2,000 rpm which is maintained at 60% or more of the coefficient of lift CL at a Reynolds number of 80,000 and a spin rate of 2,000, wherein the depth of a dimple is measured by connecting positions where the dimple meets land areas to trace a hypothetical flat plane L and determining the vertical distance from a center position on the flat plane L to a deepest portion of a bottom of the dimple.