Patent ID: 7052415

Claim:
A golf ball having a core, a cover and numerous dimples formed on the surface of said cover, said cover comprising a polyurethane elastomer as a principal component, said cover having a Shore D hardness of 30 or greater and 55 or less, occupation ratio Y of total area of dimples to surface area of a phantom sphere being equal to or greater than 75%, proportion of the number NL of dimples having a diameter of equal to or greater than 3.90 mm to total number N of the dimples being equal to or greater than 75%, and proportion of the number ML of dimples having a diameter of equal to or greater than 3.90 mm, complying with the following formula (1) and having a radius of curvature Re of 2.0 mm or greater and 5.0 mm or less to the number NL being equal to or greater than 50%: 0.5 ≦Re/Rw≦ 1.5 (1) wherein Re represents a radius of curvature of a curved surface between a dimple edge and a point positioned downward from the dimple edge by the depth of 10% in an in-depth direction; and wherein Rw represents a radius of curvature of a curved surface between a point positioned downward from the dimple edge by the depth of 20% in an in-depth direction and a point positioned downward from the dimple edge by the depth of 50% in an in-depth direction.