# US 11,110,327 B2 · 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 11,110,327 B2 - Document ID: US11110327B2 - Status: Granted - Kind: B2 - Application number: 16/846,604 - Filed: 2020-04-13 - Published: 2020-10-29 - Granted: 2021-09-07 - Earliest claimed: 2019-04-26 - Assignees: Sumitomo Rubber Industries, Ltd. - Applicants: Sumitomo Rubber Industries, Ltd. - Inventors: Naruhiro Mizutani - Web page: https://patentgrep.com/patent/US11110327B2 ## CPC - A63B 53/0466: {wood-type} - A63B 60/02: Ballast means for adjusting the centre of mass (A63B60/24, A63B60/54 take precedence) - A63B 60/002: {Resonance frequency related characteristics} - A63B 60/42: Devices for measuring, verifying, correcting or customising the inherent characteristics of golf clubs, bats, rackets or the like, e.g. measuring the maximum torque a batting shaft can withstand - A63B 60/54: with means for damping vibrations - A63B 53/0412: {Volume} - A63B 53/0433: {with special sole configurations} - A63B 53/0437: {with special crown configurations} - A63B 53/045: {Strengthening ribs} - A63B 60/50: with through-holes (A63B60/18 takes precedence; for stringing purposes A63B49/00) - A63B 2053/0491: {with added weights, e.g. changeable, replaceable} - A63B 2209/02: with reinforcing fibres, e.g. carbon, polyamide fibres - A63B 2209/10: with adhesive type surfaces, i.e. hook and loop-type fastener - 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 according to the present invention includes a head body and at least one cover member attached to the head body and having a specific gravity smaller than the head body. The head body has an internal space, and includes at least one opening and in communication with the internal space, and at least one bridge portion having a traverse portion that traverses at least the opening and extending along an inner wall surface of the head body. The opening is closed by the cover member, a height of the bridge portion from the inner wall surface of the head body changes in a direction in which the bridge portion extends. ## Claims ### Claim 1 A golf club head comprising: a head body having a face portion, a crown portion and a sole portion: and a cover member attached to the head body and having a specific gravity smaller than the head body, wherein the head body has: an internal space surrounded by the face portion, the crown portion and the sole portion, and includes: an opening formed in at least one of the crown portion and the sole portion and in communication with the internal space, and a bridge portion having a traverse portion that traverses at least the opening and extending along an inner wall surface of the head body, the opening is closed by the cover member from an outer side of the head body, the bridge portion includes a joining surface that contacts the cover member, and a height of the bridge portion from the inner wall surface of the head body changes in a direction in which the bridge portion extends; wherein the bridge portion extends in a toe-heel direction to a vicinity of a toe-side edge portion of the sole portion, and the height of the bridge portion becomes lower proceeding toward the toe-side edge portion of the sole portion. ### Claim 2 (depends on 1) The golf club head according to claim 1, wherein an installation portion on which a peripheral portion of the cover member is arranged is formed on a peripheral portion of the opening, a step is formed at a boundary between an outer edge of the installation portion and an outer surface of the head body, and the golf club head is constituted such that the peripheral portion of the cover member arranged on the installation portion is substantially flush with the outer surface of the head body. ### Claim 3 (depends on 2) The golf club head according to claim 2, wherein a second installation portion having a small thickness is formed in part of the installation portion. ### Claim 4 (depends on 2) The golf club head according to claim 2, wherein, in the head body, a thin portion having a smaller thickness than the installation portion is formed at least partially around the installation portion. ### Claim 5 (depends on 4) The golf club head according to claim 4, wherein a thick portion having a larger thickness than the thin portion is formed at least partially around the thin portion. ### Claim 6 (depends on 5) The golf club head according to claim 5, wherein the thick portion is formed on the toe side and the heel side, sandwiching the opening. ### Claim 7 (depends on 1) The golf club head according to claim 1, wherein the bridge portion extends in the toe-heel direction, the opening is partitioned by the bridge portion that extends in the toe-heel direction into a first opening on a face side and a second opening on a back side, and the first opening has a smaller area than the second opening. ### Claim 8 (depends on 1) The golf club head according to claim 1, wherein the opening is formed on the toe side in the toe-heel direction. ### Claim 9 (depends on 1) The golf club head according to claim 1, wherein the opening is formed in the sole portion. ### Claim 10 A golf club head comprising: a head body having a face portion, a crown portion and a sole portion: and a cover member attached to the head body and having a specific gravity smaller than the head body, wherein the head body has: an internal space surrounded by the face portion, the crown portion and the sole portion, and includes: an opening formed in at least one of the crown portion and the sole portion and in communication with the internal space, and a bridge portion having a traverse portion that traverses at least the opening and extending along an inner wall surface of the head body, the opening is closed by the cover member from an outer side of the head body, the bridge portion includes a joining surface that contacts the cover member, and a height of the bridge portion from the inner wall surface of the head body changes in a direction in which the bridge portion extends; wherein an installation portion on which a peripheral portion of the cover member is arranged is formed on a peripheral portion of the opening, a step is formed at a boundary between an outer edge of the installation portion and an outer surface of the head body, the golf club head is constituted such that the peripheral portion of the cover member arranged on the installation portion is substantially flush with the outer surface of the head body, and in the head body, a thin portion having a smaller thickness than the installation portion is formed at least partially around the installation portion. ### Claim 11 (depends on 10) The golf club head according to claim 10, wherein the bridge portion extends in a toe-heel direction to a vicinity of a toe-side edge portion of the sole portion, and the height of the bridge portion becomes lower proceeding toward the toe-side edge portion of the sole portion. ### Claim 12 (depends on 10) The golf club head according to claim 10, wherein a thick portion having a larger thickness than the thin portion is formed at least partially around the thin portion. ### Claim 13 (depends on 12) The golf club head according to claim 12, wherein the thick portion is formed on the toe side and the heel side, sandwiching the opening. ### Claim 14 (depends on 10) The golf club head according to claim 10, wherein the bridge portion extends in the toe-heel direction, the opening is partitioned by the bridge portion that extends in the toe-heel direction into a first opening on a face side and a second opening on a back side, and the first opening has a smaller area than the second opening. ### Claim 15 (depends on 10) The golf club head according to claim 10, wherein the opening is formed on the toe side in the toe-heel direction. ### Claim 16 (depends on 10) The golf club head according to claim 10, wherein the opening is formed in the sole portion.