# US 11,998,809 B2 · Club heads with varying groove parameters and related methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,809 B2 - Document ID: US11998809B2 - Status: Granted - Kind: B2 - Application number: 17/648,264 - Filed: 2022-01-18 - Published: 2022-05-05 - Granted: 2024-06-04 - Earliest claimed: 2014-08-26 - Assignees: Karsten Manufacturing Corporation - Applicants: Karsten Manufacturing Corporation - Inventors: Martin Jertson; Ryan Stokke; Evan Greer - Web page: https://patentgrep.com/patent/US11998809B2 ## CPC - A63B 53/04: Heads - A63B 53/047: {iron-type} - A63B 53/005: {Club sets} - A63B 53/0408: {characterised by specific dimensions, e.g. thickness} - A63B 53/0445: {Details of grooves or the like on the impact surface} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract Some embodiments include a first golf club head and a second golf club head. The first golf club head includes a body having a face portion, and the second golf club head includes a body having a face portion. Meanwhile, the first club face portion comprises a face surface and at least one first club groove, and the second club face portion comprises a face surface and at least one second club groove. An edge radius of the first club head groove(s) can be less than an edge radius of the second club head groove(s), a base width of the first club head groove(s) can be less than a base width of the second club head groove(s), and/or a sidewall angle of the first club head groove(s) can be greater than a sidewall angle of the second club head groove(s). Other embodiments of related club heads and methods are also disclosed. ## Claims ### Claim 1 A set of golf club heads, the set comprising: a first golf club head comprising: a first club head body comprising a first club face portion; and a second golf club head comprising: a second club head body comprising a second club face portion; wherein: the first club face portion comprises a first club face surface and multiple first club grooves; the first golf club head comprises a first club loft angle less than or equal to approximately 65 degrees; each first club groove, respectively, of the multiple first club grooves comprises a first club groove base, a first club groove sidewall adjacent to the first club groove base, a first club groove edge point, a first club groove edge radius at the first club groove edge point, and a first club groove central axis approximately perpendicular to the first club groove base; the first club groove base comprises a first groove base width; the first club groove sidewall forms a first club groove sidewall angle; wherein the first club face surface further comprises a first filleted transition such that the first groove sidewall interfaces with the first filleted transition at a first groove sidewall transition point and the first club face surface interfaces with the first filleted transition at a first face surface transition point such that the first groove edge point is located between the first groove sidewall transition point and the first face surface transition point; the second club face portion comprises a second club face surface and multiple second club grooves; the second golf club head comprises a second club loft angle less than the first loft angle; each second club groove, respectively, of the multiple second club grooves comprises a second club groove base, a second club groove sidewall adjacent to the second club groove base, a second club groove edge point, a second club groove edge radius at the second club groove edge point, and a second club groove central axis approximately perpendicular to the second club groove base; the second club groove base comprises a second groove base width; the second club groove sidewall forms a second club groove sidewall angle; wherein the second club face surface further comprises a second filleted transition such that the second groove sidewall interfaces with the second filleted transition at a second groove sidewall transition point and the second club face surface interfaces with the second filleted transition at a second face surface transition point such that the second groove edge point is located between the second groove sidewall transition point and the second face surface transition point; the first club groove edge radius is less than the second club groove edge radius; and at least one of: the first club groove base width is less than the second club groove base width; or the first club groove sidewall angle is greater than the second club groove sidewall angle. ### Claim 2 (depends on 1) The set of golf club heads of claim 1 wherein: the first club groove edge radius is greater than or equal to approximately 0.007 centimeters and less than or equal to approximately 0.026 centimeters. ### Claim 3 (depends on 1) The set of golf club heads of claim 1 wherein: the first club groove edge radius is greater than or equal to approximately 0.015 centimeters and less than or equal to approximately 0.026 centimeters. ### Claim 4 (depends on 1) The set of golf club heads of claim 1 wherein: when the first loft angle is greater than or equal to 45 degrees and less than or equal to 55 degrees then the first club groove sidewall angle is greater than or equal to approximately 13 degrees and less than or equal to approximately 19 degrees. ### Claim 5 (depends on 1) The set of golf club heads of claim 1 wherein: when the first loft angle is greater than or equal to 56 degrees and less than or equal to 60 degrees then the first club groove sidewall angle is greater than or equal to approximately 13 degrees and less than or equal to approximately 19 degrees. ### Claim 6 (depends on 1) The set of golf club heads of claim 1 wherein: each first club groove, respectively, of the multiple first club grooves comprises a first club groove depth measured between the first club face surface and the first club groove base; and the first club groove depth of each first club groove, respectively, of the multiple first club grooves is approximately the same. ### Claim 7 (depends on 6) The set of golf club heads of claim 6 wherein: the first club groove depth is approximately 0.04 centimeters. ### Claim 8 (depends on 1) The set of golf club heads of claim 1 wherein: each first club groove, respectively, of the multiple first club grooves comprises a first club groove depth measured between the first club face surface and the first club groove base; each second club groove, respectively, of the multiple second club grooves comprises a second club groove depth measured between the second club face surface and the second club groove base; and the first club groove depth is approximately equal to the second club groove depth. ### Claim 9 (depends on 8) The set of golf club heads of claim 8 wherein: the first club groove depth is approximately 0.04 centimeters. ### Claim 10 (depends on 1) The set of golf club heads of claim 1 wherein: each first club groove, respectively, of the multiple first club grooves comprises a first club groove edge point depth measured approximately parallel to the first club groove central axis and between the first club groove edge point and the first club face surface; and the first club groove edge point depth is approximately 0.004 centimeters. ### Claim 11 (depends on 1) The set of golf club heads of claim 1 wherein: each first club groove, respectively, of the multiple first club grooves comprises a first club groove edge point width measured approximately perpendicular to the first club groove central axis and between the first club groove edge point and the first club groove central axis; and the first club groove edge point width is approximately 0.037 centimeters. ### Claim 12 (depends on 1) The set of golf club heads of claim 1 wherein: the first club head and the second club head may comprise one or more metal materials. ### Claim 13 (depends on 12) The set of golf club heads of claim 12 wherein: the one or more metal materials are chosen from a group consisting of 17-4 stainless steel, 431 stainless steel, 8620 carbon steel, and 1025 carbon steel. ### Claim 14 (depends on 1) The set of golf club heads of claim 1 wherein: the first club loft angle is less than or equal to approximately 45 degrees; and the second golf club head comprises a second club loft angle less than the first club loft angle. ### Claim 15 (depends on 1) The set of golf club heads of claim 1 wherein: the first club loft angle is less than or equal to approximately 47 degrees; and the second golf club head comprises a second club loft angle less than the first loft angle. ### Claim 16 (depends on 1) The set of golf club heads of claim 1 wherein: a first groove fade angle is defined as an angle that a first line tangent to the first face surface transition point forms with the first face surface; and a second groove fade angle is defined as an angle that a second line tangent to the second face surface transition point forms with the second face surface. ### Claim 17 (depends on 16) The set of golf club heads of claim 16 wherein: the first groove fade angle is approximately 12 degrees; and the second groove fade angle is approximately 12 degrees. ### Claim 18 (depends on 1) The set of golf club heads of claim 1 wherein: the first groove base width is greater than or equal to approximately 0.0350 centimeter and less than or equal to approximately 0.0414 centimeter. ### Claim 19 (depends on 1) The set of golf club heads of claim 1 wherein: the first club groove central axis approximately perpendicular to the first club groove base; the first club groove central axis of all adjacent grooves of the multiple first club grooves are spaced apart by a first club groove pitch; the second club groove central axis approximately perpendicular to the second club groove base; the second club groove central axis of all adjacent grooves of the multiple second club grooves are spaced apart by a second club groove pitch. ### Claim 20 (depends on 19) The set of golf club heads of claim 19 wherein: the first club groove pitch and the second club groove pitch are in a range of 0.330 centimeters to 0.366 centimeters.