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 great circles and consisting of an equal number of first domains and second domains, and wherein:
the first domain has three-way rotational symmetry about the central point of the first domain;
the second domain has three-way rotational symmetry about the central point of the second domain;
the dimple pattern within the first domain is different from the dimple pattern within the second domain;
a majority of the dimples are spherical dimples having a circular plan shape and a cross-sectional profile defined by a spherical function;
each spherical dimple has an edge angle of from 9° to 13°;
the dimples cover from 68% to 85% of the outer surface of the golf ball;
the number of dimples on the outer surface of the golf ball is from 420 to 700;
the number of different dimple diameters on the outer surface of the golf ball is 3 or greater; and
at least one dimple having the minimum dimple diameter is nearest neighbors with at least one dimple having the maximum dimple diameter.
2. The golf ball of claim 1 , wherein the number of different dimple diameters on the outer surface of the golf ball is 5 or greater.
3. The golf ball of claim 1 , wherein the number of different dimple diameters on the outer surface of the golf ball is 7 or greater.
4. The golf ball of claim 1 , wherein the dimples cover from 70% to 80% of the outer surface of the golf ball.
5. The golf ball of claim 1 , wherein at least 90% of the dimples have a dimple diameter of from 0.050 inches to 0.160 inches, and wherein the maximum dimple diameter is 0.170 inches or less.
6. The golf ball of claim 1 , wherein the first domain consists of a total number of dimples located therein, N D1 , the second domain consists of dimples having a total number of dimples located therein, N D2 , and N D1 >55, ND2>55, and N D1 ≠N D2 .
7. The golf ball of claim 6 , wherein N D1 >60 and N D2 >60.
8. The golf ball of claim 6 , wherein N D1 >70 and N D2 >70.
9. The golf ball of claim 6 , wherein the difference in N D1 and N D2 is from 1 to 5.
10. The golf ball of claim 6 , wherein the difference in N D1 and N D2 is from 6 to 10.
11. 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 great circles and consisting of an equal number of first domains and second domains, and wherein:
the first domain has three-way rotational symmetry about the central point of the first domain;
the second domain has three-way rotational symmetry about the central point of the second domain;
the dimple pattern within the first domain is different from the dimple pattern within the second domain;
a majority of the dimples are spherical dimples having a circular plan shape and a cross-sectional profile defined by a spherical function;
each spherical dimple has an edge angle of from 13° to 19°;
the dimples cover from 68% to 85% of the outer surface of the golf ball;
the number of dimples on the outer surface of the golf ball is from 420 to 700;
the number of different dimple diameters on the outer surface of the golf ball is 3 or greater; and
at least one dimple having the minimum dimple diameter is nearest neighbors with at least one dimple having the maximum dimple diameter.
12. The golf ball of claim 11 , wherein the number of different dimple diameters on the outer surface of the golf ball is 5 or greater.
13. The golf ball of claim 11 , wherein the number of different dimple diameters on the outer surface of the golf ball is 7 or greater.
14. The golf ball of claim 11 , wherein the dimples cover from 70% to 80% of the outer surface of the golf ball.
15. The golf ball of claim 11 , wherein at least 90% of the dimples have a dimple diameter of from 0.050 inches to 0.160 inches, and wherein the maximum dimple diameter is 0.170 inches or less.
16. The golf ball of claim 11 , wherein the first domain consists of a total number of dimples located therein, N D1 , the second domain consists of dimples having a total number of dimples located therein, N D2 , and N D1 >55, ND2>55, and N D1 ≠N D2 .
17. The golf ball of claim 16 , wherein N D1 >60 and N D2 >60.
18. The golf ball of claim 16 , wherein N D1 >70 and N D2 >70.
19. The golf ball of claim 16 , wherein the difference in N D1 and N D2 is from 1 to 5.
20. The golf ball of claim 16 , wherein the difference in N D1 and N D2 is from 6 to 10.