Dimple patterns for golf balls
The present invention provides a method for arranging dimples on a golf ball surface in which the dimples are arranged in a pattern derived from at least one irregular domain generated from a regular or non-regular polyhedron. The method includes choosing control points of a polyhedron, generating an irregular domain based on those control points, packing the irregular domain with dimples, and tessellating the irregular domain to cover the surface of the golf ball. The control points include the center of a polyhedral face, a vertex of the polyhedron, a midpoint or other point on an edge of the polyhedron and others. The method ensures that the symmetry of the underlying polyhedron is preserved while minimizing or eliminating great circles due to parting lines.
1. A golf ball having an outer surface comprising a plurality of dimples disposed thereon, wherein the dimples are arranged in multiple copies of a first domain and a second domain, the first domain and the second domain being tessellated to cover the outer surface of the golf ball in a uniform pattern having no dimple-free great circles and consisting of four first domains and four second domains, and wherein:
the dimple pattern within the first domain is different from the dimple pattern within the second domain;
the plurality of dimples comprises dimples having three or more different dimple diameters including a minimum dimple diameter, a maximum dimple diameter, and one or more additional dimple diameters;
the dimples of the first domain comprise dimples having three or more different diameters;
the dimples of the second domain comprise dimples having three or more different diameters; and
the difference between ΣSD1 and ΣSD2 is 15 or greater, where ΣSD1 is the total number of dimples positioned in the first domain and ΣSD2 is the total number of dimples positioned in the second domain.
2. The golf ball of claim 1 , wherein the difference between ΣSD1 and ΣSD2 is 20 or greater.
3. The golf ball of claim 1 , wherein the difference between ΣSD1 and ΣSD2 is 25 or greater.
4. The golf ball of claim 1 , wherein, for each of the different dimple diameters on the ball, SD1≠SD2, where SD1 is the number of dimples positioned within the first domain having a given diameter, and SD2 is the number of dimples positioned within the second domain having said given diameter.
5. The golf ball of claim 4 , wherein, for each of the different dimple diameters on the ball, the difference between SD1 and SD2 is 3 or greater.
6. The golf ball of claim 4 , wherein the difference between SD1 and SD2 is greatest for one of the one or more additional dimple diameters.
7. The golf ball of claim 1 , wherein SD1>0 and SD2>0 for at least one dimple diameter, where SD1 is the number of dimples positioned within the first domain having a given diameter, and SD2 is the number of dimples positioned within the second domain having said given diameter.