# US 2019/0168075 A1 · Golf balls with aerodynamic subsurfaces > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168075 A1 - Document ID: US20190168075A1 - Status: Published application - Kind: A1 - Application number: 15/829,075 - Filed: 2017-12-01 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: Acushnet Company - Applicants: Acushnet Company - Inventors: Nicholas M. Nardacci; Michael R. Madson; Chris Hixenbaugh - Web page: https://patentgrep.com/patent/US20190168075A1 ## CPC - A63B 37/00065: {located around the pole or the equator} - A63B 37/0007: {Non-circular dimples} - A63B 37/0012: {Dimple profile, i.e. cross-sectional view} - A63B 37/0021: {Occupation ratio, i.e. percentage surface occupied by dimples} - A63B 37/0074: {Two piece balls, i.e. cover and core} - 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 golf ball having an aerodynamic subsurface for packing dimples. More particularly, the invention relates to a golf ball having an exterior surface and at least a first subsurface containing at least two dimples located solely on the subsurface and lying below the exterior surface of the golf ball. A transition zone between the exterior surface and the subsurface is disclosed having an angle of transition and a top radius and a bottom radius. ## Claims ### Claim 1 A golf ball comprising: a core; a cover surrounding the core; an exterior surface provided on the cover having an exterior radius R0; at least a first subsurface having a first perimeter and a subsurface radius R1 and at least two dimples located solely within the first subsurface; and and a transition zone between the exterior surface and the first subsurface, the transition zone having an angle of transition and a top radius and a bottom radius, wherein the first subsurface is offset from the exterior surface by a value δ1 such that R1=R0−δ1 and δ1 is between about 0.003 and about 0.020 inches, wherein the first subsurface is spherical and concentric to the exterior surface, and wherein at least three dimples provided on the first subsurface adjacent the first perimeter have a dimple perimeter and at least 20 percent of the dimple perimeter is within about 0.010 inches of the first perimeter. ### Claim 2 (depends on 1) The golf ball of claim 1, wherein the angle of transition is between about 10° to about 90°. ### Claim 3 (depends on 2) The golf ball of claim 2, wherein the angle of transition is between 30° to 60°. ### Claim 4 (depends on 1) The golf ball of claim 1, wherein the top radius is about 0.001 to about 0.010 inches. ### Claim 5 (depends on 1) The golf ball of claim 1, wherein the bottom radius is about 0.001 to about 0.016 inches. ### Claim 6 (depends on 1) The golf ball of claim 1, wherein the transition zone has a transition wall that is straight or curved. ### Claim 7 (depends on 1) The golf ball of claim 1, wherein the top radius is different than the bottom radius. ### Claim 8 (depends on 1) The golf ball of claim 1, wherein the first perimeter is non-circular. ### Claim 9 (depends on 8) The golf ball of claim 8, wherein the first perimeter has a non-constant radius of curvature. ### Claim 10 (depends on 9) The golf ball of claim 9, wherein the radius of curvature along any point of the first perimeter does not exceed 0.2 inches. ### Claim 11 (depends on 10) The golf ball of claim 10, wherein the first perimeter has at least one inflection point. ### Claim 12 A golf ball comprising: a core; a cover surrounding the core; an exterior surface provided on the cover having an exterior radius R0; at least a first subsurface having a first perimeter and a subsurface radius R1 and at least two dimples located solely within the first subsurface; and and a transition zone between the exterior surface and the first subsurface, the transition zone having an angle of transition and a top radius and a bottom radius, wherein the first subsurface is offset from the exterior surface by a value δ1 such that R1=R0−δ1 and δ1 is between about 0.009 and about 0.015 inches; and wherein the first subsurface is spherical and concentric to the exterior surface. ### Claim 13 (canceled) ### Claim 14 (depends on 1) The golf ball of claim 1, wherein the exterior surface has a dimple arrangement sub-pattern having faces and vertices, and the first subsurface is centered at the vertices of the sub-pattern. ### Claim 15 (depends on 1) The golf ball of claim 1, wherein the exterior surface has a dimple arrangement sub-pattern having faces and vertices and the first subsurface is centered on the faces of the sub-pattern. ### Claim 16 (canceled) ### Claim 17 (depends on 1) The golf ball of claim 1, wherein the dimples have non-circular plan shapes. ### Claim 18 (depends on 1) The golf ball of claim 1, further comprising at least one dimple on the exterior surface. ### Claim 19 (depends on 1) The golf ball of claim 1, further comprising at least two dimples on the exterior surface and wherein the first perimeter is independent of the dimples on the exterior surface. ### Claim 20 (depends on 1) The golf ball of claim 1, wherein the exterior surface is spherical and has a nearly equal radius at all points along the exterior surface. ### Claim 21 (depends on 1) The golf ball of claim 1, wherein the exterior surface has a dimple coverage of about 70% to about 90% and any subsurfaces have dimple coverages of about 50% to about 90%.