Patent ID: 7452292
Filing Date: 2008-11-18
Classification: A63B

Abstract:
1. A golf ball comprising: a resilient solid core comprising at least two discrete layers; and a plurality of dimples in a plurality of types of differing diameters and disposed on a spherical surface, wherein the dimples include smallest size dimples having a diameter of 2.7 mm or less and largest size dimples having a diameter of 4.3 mm or more, and at least 50% of the total number of dimples are dimples in which an arc that connects mutually opposing positions on a wall of the dimple at a 70% dimple depth level with a deepest position on the dimple wall has a radius of curvature R of at least 15 mm, wherein a top edge of the dimples and their vicinity have an arcuate shape having a radius of curvature, and the radius of curvature prior to painting is within the range 0.3 to 3 mm.