Patent ID: 7614966

Claim:
A golf ball which comprises a spherical core, and a cover positioned outside of the core, said core having a spherical center, and a mid layer positioned outside of the center, said center having a center inner sphere and a center outer layer positioned outside of the inner sphere, wherein a peak in a hardness curve from a center point of said inner sphere to a surface of the cover is attained in the mid layer, said cover having a thickness Tc equal to or less than 1.0 mm, said cover having a hardness Hc of 20 or greater and 50 or less, and wherein a ratio (D 2 /D 3 ) of the amount of compressive deformation D 2 of said core to the amount of compressive deformation D 3 of the golf ball is 0.98 or greater and 1.10 or less.