Patent ID: 6241627
Filing Date: 2001-06-05
Classification: A63B

Abstract:
A golf ball having plural types of dimples on a spherical surface, wherein the spherical surface is substantially a regular icosahedron or pseudo-icosahedron having twenty triangles, apexes of five triangles joined together at a vertex formed by each apex of said triangles,those dimples arranged in each triangle constitute an arrangement unit,a first dimple having a smallest diameter is located substantially at each vertex on the overall spherical surface,five second dimples having a greater diameter than that of the first dimple are closely and equidistantly arranged around the first dimple, andwhen a pentagon which circumscribes the five second dimples is drawn with its center at the vertex, an average depth of those dimples located within twelve pentagons on the overall spherical surface is up to 85% of the average depth of those dimples located in the remaining areas outside the pentagon.