# US 9,873,021 B2 · Dimple patterns for golf balls > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,873,021 B2 - Document ID: US9873021B2 - Status: Granted - Kind: B2 - Application number: 15/387,766 - Filed: 2016-12-22 - Published: 2017-04-06 - Granted: 2018-01-23 - Earliest claimed: 2008-10-31 - Assignees: Acushnet Company - Applicants: Acushnet Company - Inventors: Michael R. Madson; Nicholas M. Nardacci - Web page: https://patentgrep.com/patent/US9873021B2 ## CPC - A63B 37/0006: {Arrangement or layout of dimples} - A63B 37/0004: {Surface depressions or protrusions} - A63B 37/0007: {Non-circular dimples} - A63B 37/0018: {Specified number of dimples} - A63B 37/002: {Specified dimple diameter} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract 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. ## Claims ### Claim 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 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 first domain is defined by three irregular segments and has three-way rotational symmetry about the central point of the first domain; the second domain is defined by three irregular segments and has three-way rotational symmetry about the central point of the second domain; and the first domain consists of perimeter dimples and interior dimples, wherein the perimeter dimples of the first domain are positioned adjacent to the three irregular segments defining the first domain, and wherein all of the perimeter dimples of the first domain satisfy a diameter relationship such that if xdimple 1>xdimple 2 then ddimple 1xdimple 4 then ddimple 3xdimple 2 then ddimple 1>ddimple 2, where dimple 1 and dimple 2 are any two perimeter dimples of the first domain positioned adjacent to a common irregular segment, d is the dimple diameter, and x is the distance from the center of the dimple to the midpoint of a reference line connecting the endpoints of the common irregular segment. ### Claim 9 (depends on 8) The golf ball of claim 8, wherein the second domain consists of perimeter dimples and interior dimples, wherein the perimeter dimples of the second domain are positioned adjacent to the three irregular segments defining the second domain, and wherein all of the perimeter dimples of the second domain satisfy a diameter relationship such that if xdimple 3>xdimple 4 then ddimple 3>ddimple 4, where dimple 3 and dimple 4 are any two perimeter dimples of the second domain positioned adjacent to a common irregular segment, d is the dimple diameter, and x is the distance from the center of the dimple to the midpoint of a reference line connecting the endpoints of the common irregular segment. ### Claim 10 (depends on 8) The golf ball of claim 8, wherein the second domain consists of perimeter dimples and interior dimples, and wherein the total number of perimeter dimples of the first domain is not equal to the total number of perimeter dimples of the second domain. ### Claim 11 (depends on 8) The golf ball of claim 8, wherein the second domain consists of perimeter dimples and interior dimples, and wherein the total number of perimeter dimples of the first domain is equal to the total number of perimeter dimples of the second domain. ### Claim 12 (depends on 8) The golf ball of claim 8, wherein at least one perimeter dimple of the first domain has substantially the same diameter as at least one of its nearest neighbor dimples located in the second domain. ### Claim 13 (depends on 8) The golf ball of claim 8, wherein each perimeter dimple of the first domain has substantially the same diameter as at least one of its nearest neighbor dimples located in the second domain. ### Claim 14 (depends on 8) The golf ball of claim 8, wherein none of the perimeter dimples of the first domain has substantially the same diameter as any of its nearest neighbor dimples located in the second domain. ### Claim 15 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 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 first domain is defined by three irregular segments and has three-way rotational symmetry about the central point of the first domain; the second domain is defined by three irregular segments and has three-way rotational symmetry about the central point of the second domain; the first domain consists of perimeter dimples and interior dimples, wherein the perimeter dimples of the first domain are positioned adjacent to the three irregular segments defining the first domain, and wherein all of the perimeter dimples of the first domain satisfy a diameter relationship such that if xdimple 1>xdimple 2 then ddimple 1xdimple 4 then ddimple 3>ddimple 4, where dimple 3 and dimple 4 are any two perimeter dimples of the second domain positioned adjacent to a common irregular segment, d is the dimple diameter, and x is the distance from the center of the dimple to the midpoint of a reference line connecting the endpoints of the common irregular segment of dimple 3 and dimple 4. ### Claim 16 (depends on 15) The golf ball of claim 15, wherein the total number of perimeter dimples of the first domain is not equal to the total number of perimeter dimples of the second domain. ### Claim 17 (depends on 15) The golf ball of claim 15, wherein the total number of perimeter dimples of the first domain is equal to the total number of perimeter dimples of the second domain. ### Claim 18 (depends on 15) The golf ball of claim 15, wherein at least one perimeter dimple of the first domain has substantially the same diameter as at least one of its nearest neighbor dimples located in the second domain. ### Claim 19 (depends on 15) The golf ball of claim 15, wherein each perimeter dimple of the first domain has substantially the same diameter as at least one of its nearest neighbor dimples located in the second domain. ### Claim 20 (depends on 15) The golf ball of claim 15, wherein none of the perimeter dimples of the first domain has substantially the same diameter as any of its nearest neighbor dimples located in the second domain.