# US 8,540,587 B2 · Golf club head with sound tuning > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,587 B2 - Document ID: US8540587B2 - Status: Granted - Kind: B2 - Application number: 13/073,843 - Filed: 2011-03-28 - Published: 2011-07-14 - Granted: 2013-09-24 - Earliest claimed: 2008-05-30 - Assignees: Cobra Golf Incorporated - Applicants: Robert D Hirsch; Joshua G. Breier - Inventors: Robert D Hirsch; Joshua G. Breier - Web page: https://patentgrep.com/patent/US8540587B2 ## CPC - A63B 53/0466: {wood-type} - A63B 60/54: with means for damping vibrations - A63B 53/0433: {with special sole configurations} - A63B 53/0437: {with special crown configurations} - A63B 53/045: {Strengthening ribs} - A63B 2071/0625: {Emitting sound, noise or music} - Y10T 29/49716: Converting - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A golf club head with sound tuning. The golf club head includes a hollow body that defines an interior cavity and at least one tuning member extends across the interior cavity. The tuning member dimensions, stiffness and dampening characteristics are selected to alter the vibration behavior of the golf club head. ## Claims ### Claim 1 A method of tuning a golf club head comprising: providing a body including a crown portion and a sole portion, the body defining an interior cavity, wherein an aperture extends through the sole portion, the crown portion comprising a first attachment location within the interior cavity; selecting one of a plurality of removable tuning members so as to change the sound tuning of a golf club head; inserting the selected removable tuning member through the aperture and into the cavity such that the tuning member extends across the interior cavity and engages the crown portion at the first attachment location; and attaching a removable cover to the sole portion in the aperture, such that the tuning member is placed in a state of compression between the crown portion and the sole portion. ### Claim 2 (depends on 1) The method of claim 1, wherein the removable tuning member engages the cover. ### Claim 3 (depends on 1) The method of claim 1, wherein the first attachment location comprises a crown boss, and wherein the sole comprises an interior sole boss, and the selected removable tuning member engages both the crown and sole bosses. ### Claim 4 (depends on 3) The method of claim 3, wherein the aperture extends through the sole boss. ### Claim 5 (depends on 4) The method of claim 4, wherein the crown boss includes a mating surface that abuts an end surface of the tuning member. ### Claim 6 (depends on 1) The method of claim 1, wherein the selected removable tuning member comprises a spring member. ### Claim 7 (depends on 1) The method of claim 1, wherein the selected removable tuning member is constructed from both a metallic material and a non-metallic material. ### Claim 8 (depends on 7) The method of claim 7, wherein the non-metallic material is a viscoelastic polymer. ### Claim 9 (depends on 1) The method of claim 1, wherein the cover includes a threaded outer surface that threadably engages a threaded inner surface along the aperture. ### Claim 10 (depends on 1) The method of claim 1, wherein the cover comprises at least one tool engagement feature, and the method further comprises using a tool to remove the cover. ### Claim 11 A golf club head, comprising: a body including a crown portion and a sole portion and defining an interior cavity, wherein an aperture extends through the sole portion, the crown portion comprising a first attachment location within the interior cavity; a cover removably coupled to the sole portion in the aperture, the cover including a tool engagement feature along an outer surface of the cover; and a removable tuning member selected from a plurality of tuning members for adjusting the sound tuning of the club head the selected removable tuning member extending across the interior cavity, wherein a first end of the tuning member is removably coupled to the crown portion at the first attachment location, and a second end of the tuning member is removably coupled to the cover. ### Claim 12 (depends on 11) The golf club head of claim 11, wherein the removable tuning member is in a state of compression between the first attachment location and the cover. ### Claim 13 (depends on 11) The golf club head of claim 11, wherein the first attachment location comprises a crown boss, and wherein the sole comprises an interior sole boss, and the selected removable tuning member engages both the crown and sole bosses. ### Claim 14 (depends on 13) The golf club of claim 13, wherein the aperture extends through the interior sole boss. ### Claim 15 (depends on 11) The golf club head of claim 11, wherein the crown boss includes a mating surface that is in abutment with an end surface of the tuning member. ### Claim 16 (depends on 11) The golf club head of claim 11, wherein the tuning member comprises a spring member. ### Claim 17 (depends on 11) The golf club head of claim 11, wherein the tuning member is constructed from both a metallic material and a non-metallic material. ### Claim 18 (depends on 17) The golf club head of claim 17, wherein the non-metallic material is a viscoelastic polymer. ### Claim 19 (depends on 11) The golf club head of claim 11, wherein the cover includes a threaded outer surface that is configured to threadably engage with a threaded inner surface along the aperture. ### Claim 20 (depends on 11) The golf club head of claim 11, wherein the selected removable tuning member comprises a plurality of lateral slots.