Patent ID: 6986720
Filing Date: 2006-01-17
Classification: A63B

Abstract:
1. A golf ball having numerous dimples on the surface thereof, wherein surface area occupation ratio Y of said dimples is equal to or greater than 75%, proportion of the number NL of dimples having the diameter of equal to or greater than 3.90 mm occupied in total number N of the dimples is equal to or greater than 75%, and proportion of the number ML of dimples, having the diameter of equal to or greater than 3.90 mm, complying with the following formula (1) and having a radius of curvature Re in the following formula (1) of 2.0 mm or greater and 5.0 mm or less, occupied in the number NL is equal to or greater than 50%: wherein: Re represents a radius of curvature of a curved surface between the dimple edge and a point positioned downward from the dimple edge by the depth of 10% in an in-depth direction; 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.