# US 11,298,598 B2 · Low and back crown mass for a golf club head > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,598 B2 - Document ID: US11298598B2 - Status: Granted - Kind: B2 - Application number: 17/131,487 - Filed: 2020-12-22 - Published: 2021-04-15 - Granted: 2022-04-12 - Earliest claimed: 2015-05-05 - Assignees: Karsten Manufacturing Corporation - Applicants: Karsten Manufacturing Corporation - Inventors: Ryan M. Stokke - Web page: https://patentgrep.com/patent/US11298598B2 ## CPC - A63B 53/06: adjustable - A63B 53/0466: {wood-type} - A63B 53/08: with special arrangements for obtaining a variable impact - A63B 53/0408: {characterised by specific dimensions, e.g. thickness} - A63B 53/0437: {with special crown configurations} - A63B 2053/0491: {with added weights, e.g. changeable, replaceable} - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract A golf club head includes a body having aa crown defining a perimeter of the club head, a sole opposite the crown, a toe end opposite a heel end, a back end, and a hosel, the body further including a club face, an exterior side, an interior side, a head center of gravity, and a weight member positioned on one of the exterior side or the interior side of the crown. ## Claims ### Claim 1 A golf club head comprising: a golf club head body having: a club face, a crown defining a perimeter of the golf club head, a sole opposite the crown, a toe end opposite a heel end, a back end opposite the club face, an exterior surface, an interior surface, a head center of gravity, a discretionary weight, and a hosel, wherein a portion of the discretionary weight is a weight member permanently positioned adjacent the crown and a portion of the weight member projects above a crown surface, the weight member having a weight member center of gravity and an elongated arcuate shape along the crown, wherein the weight member is positioned to maximize a distance from the weight member to the head center of gravity, wherein a first end of the weight member is positioned toward the toe end, wherein a length of the weight member is measured along a center line of the weight member extending from the first end to a second end of the weight member, wherein the length of the weight member is in a range between 1.0 inch to 6.0 inches, wherein at least a portion of the weight member is composed of the same material as at least some portion the golf club head body, wherein the weight member has a weight ranging from 45 grams to 85 grams, and wherein the weight member comprises a high density region having a greater density than remaining regions of the weight member, and said high density region is located near the first end. ### Claim 2 (depends on 1) The golf club head of claim 1, wherein the weight member is positioned on an exterior side of the crown. ### Claim 3 (depends on 1) The golf club head of claim 1, wherein a portion of the weight member is positioned on an interior side of the crown. ### Claim 4 (depends on 1) The golf club head of claim 1, wherein the weight member is positioned on both an exterior side and an interior side of the crown. ### Claim 5 (depends on 1) The golf club head of claim 1, wherein the weight member projects below the crown surface. ### Claim 6 (depends on 1) The golf club head of claim 1, wherein a volume of the golf club head is between 115 cc and 300 cc. ### Claim 7 (depends on 1) The golf club head of claim 1, wherein the weight member includes a plurality of weight members. ### Claim 8 (depends on 1) The golf club head of claim 1, wherein the weight member center of gravity is closer to the toe end than the heel end. ### Claim 9 (depends on 1) The golf club head of claim 1, wherein the head center of gravity defines an origin of a coordinate system including an x-axis, a y-axis, and a z-axis, wherein the x-axis extends through the head center of gravity from the toe end to the heel end, wherein the y-axis extends though the head center of gravity from the crown to the sole, wherein the z-axis extends through the head center of gravity from the club face to the back end, and wherein the x-axis and the z-axis are arranged to coincide with numbers on an analog clock, with the z-axis extending between a 12 o'clock position through the club face and a 6 o'clock position though the back end, and the x-axis extending between a 3 o'clock position through the toe end and a 9 o'clock position through the heel end, wherein the first end of the weight member is positioned at about the 3 o'clock position. ### Claim 10 (depends on 1) The golf club head of claim 1, wherein the head center of gravity defines an origin of a coordinate system including an x-axis, a y-axis, and a z-axis, wherein the x-axis extends through the head center of gravity from the toe end to the heel end, wherein the y-axis extends though the head center of gravity from the crown to the sole, wherein the z-axis extends through the head center of gravity from the club face to the back end, and wherein the x-axis and the z-axis are arranged to coincide with numbers on an analog clock, with the z-axis extending between a 12 o'clock position through the club face and a 6 o'clock position though the back end, and the x-axis extending between a 3 o'clock position through the toe end and a 9 o'clock position through the heel end, wherein the first end of the weight member is located between the 3 o'clock and 6 o'clock positions. ### Claim 11 A golf club head comprising: a golf club head body having: a club face, a crown defining a perimeter of the golf club head, a sole opposite the crown, a toe end opposite a heel end, a back end opposite the club face, an exterior surface, an interior surface, a head center of gravity, a discretionary weight, and a hosel, wherein a portion of the discretionary weight is a weight member permanently positioned adjacent the crown and a portion of the weight member projects above a crown surface, the weight member having a weight member center of gravity and an elongated arcuate shape along the crown, wherein the weight member is positioned to maximize a distance from the weight member to the head center of gravity, wherein a first end of the weight member is positioned toward the toe end and a second end of the weight member is positioned toward the heel end, wherein a length of the weight member is measured along a center line of the weight member extending from the first end to the second end, wherein the length of the weight member is in a range between 1.0 inch to 6.0 inches, wherein at least a portion of the weight member is composed of the same material as at least some portion the golf club head body, wherein the weight member has a weight ranging from 45 grams to 85 grams, wherein the weight member comprises a plurality of high density regions, each having a greater density than remaining regions of the weight member, and wherein the plurality of high density regions include: a first high density region located near the first end, and a second high density region located near the second end. ### Claim 12 (depends on 11) The golf club head of claim 11, wherein the weight member is positioned on an exterior side of the crown. ### Claim 13 (depends on 11) The golf club head of claim 11, wherein a portion of the weight member is positioned on an interior side of the crown. ### Claim 14 (depends on 11) The golf club head of claim 11, wherein the weight member is positioned on both an exterior side and an interior side of the crown. ### Claim 15 (depends on 11) The golf club head of claim 11, wherein the weight member projects below the crown surface. ### Claim 16 (depends on 11) The golf club head of claim 11, wherein a volume of the golf club head is between 115 cc and 300 cc. ### Claim 17 (depends on 11) The golf club head of claim 11, wherein the weight member includes a plurality of weight members. ### Claim 18 (depends on 11) The golf club head of claim 11, wherein the weight member center of gravity is closer to the toe end than the heel end. ### Claim 19 (depends on 11) The golf club head of claim 11, wherein the head center of gravity defines an origin of a coordinate system including an x-axis, a y-axis, and a z-axis, wherein the x-axis extends through the head center of gravity from the toe end to the heel end, wherein the y-axis extends though the head center of gravity from the crown to the sole, wherein the z-axis extends through the head center of gravity from the club face to the back end, and wherein the x-axis and the z-axis are arranged to coincide with numbers on an analog clock, with the z-axis extending between a 12 o'clock position through the club face and a 6 o'clock position though the back end, and the x-axis extending between a 3 o'clock position through the toe end and a 9 o'clock position through the heel end, wherein the first end of the weight member is positioned at about the 3 o'clock position. ### Claim 20 (depends on 11) The golf club head of claim 11, wherein the head center of gravity defines an origin of a coordinate system including an x-axis, a y-axis, and a z-axis, wherein the x-axis extends through the head center of gravity from the toe end to the heel end, wherein the y-axis extends though the head center of gravity from the crown to the sole, wherein the z-axis extends through the head center of gravity from the club face to the back end, and wherein the x-axis and the z-axis are arranged to coincide with numbers on an analog clock, with the z-axis extending between a 12 o'clock position through the club face and a 6 o'clock position though the back end, and the x-axis extending between a 3 o'clock position through the toe end and a 9 o'clock position through the heel end, wherein the first end of the weight member is located between the 3 o'clock and 6 o'clock positions.