# US 10,307,649 B1 · Multi-material iron 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 10,307,649 B1 - Document ID: US10307649B1 - Status: Granted - Kind: B1 - Application number: 15/833,935 - Filed: 2017-12-06 - Published: 2019-06-06 - Granted: 2019-06-04 - Earliest claimed: 2017-12-06 - Assignees: Acushnet Company - Applicants: Acushnet Company - Inventors: Grant M. Martens; Uday V. Deshmukh; Charles E. Golden; Jonathan Hebreo - Web page: https://patentgrep.com/patent/US10307649B1 ## CPC - A63B 53/0475: {with one or more enclosed cavities} - A63B 53/0408: {characterised by specific dimensions, e.g. thickness} - A63B 2053/0491: {with added weights, e.g. changeable, replaceable} - A63B 2209/02: with reinforcing fibres, e.g. carbon, polyamide fibres - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract A multi-material iron type golf club head is disclosed. More specifically, the golf club head in accordance with the present invention may have a metallic portion and a lightweight portion, wherein the entirety of the striking face is made out of a metallic material while a majority of the chassis is made out of a lightweight material that serves to reduce the overall weight of the golf club head. The lightweight material, in addition to reducing the overall weight of the golf club head, may be comprised of an interior face support to at least partially support the metallic striking face portion to improve the performance and feel of the golf club head. ## Claims ### Claim 1 An iron golf club head comprising: a metallic portion further comprising a hosel, a heel portion, a topline portion, a sole portion, and a striking face, wherein said metallic portion creates an opening near a toe side of said metallic portion; a lightweight portion further comprising an exposed toe portion, a topline support, a sole support, and an internal face support, wherein said lightweight portion slidably engages said opening near said toe side of said metallic portion, wherein said metallic portion conceals said internal face support, said topline support, and said sole support, wherein said exposed toe portion of said lightweight portion is exposed externally and forms an external portion of said iron golf club head; and wherein said iron golf club head further comprises of a heel weight and a toe weight, said heel weight being retained in said iron golf club head by said metallic portion and said toe weight being retained in said iron golf club head by said lightweight portion. ### Claim 2 (depends on 1) The iron golf club head of claim 1, wherein said striking face has a thickness of between about 1.0 mm and about 1.5 mm and said internal face support has a thickness of between about 0.8 mm and about 1.2 mm. ### Claim 3 (depends on 2) The iron golf club head of claim 2, wherein said striking face has a thickness of between about 1.1 mm and about 1.4 mm and said internal face support has a thickness of between about 0.9 mm and about 1.1 mm. ### Claim 4 (depends on 3) The iron golf club head of claim 3, wherein said striking face has a thickness of between 1.2 mm and about 1.4 and said internal face support has a thickness of about 1.0 mm. ### Claim 5 (depends on 1) The iron golf club head of claim 1, wherein said metallic portion is made out of a steel material having a density greater than about 7.0 g/cc and said lightweight portion is made out of a composite type material having a density less than about 3.0 g/cc. ### Claim 6 (depends on 5) The iron golf club head of claim 5, wherein said metallic portion is made out of a steel material having a density greater than about 7.3 g/cc and said lightweight portion is made out of a composite type material having a density less than about 2.5 g/cc. ### Claim 7 (depends on 6) The iron golf club head of claim 6, wherein said metallic portion is made out of a steel material having a density greater than about 7.6 g/cc and said lightweight portion is made out of a composite type material having a density less than about 2.0 g/cc. ### Claim 8 (depends on 1) The iron golf club head of claim 1, wherein said lightweight portion further comprises a lightweight face portion, and a lightweight toe portion, wherein said lightweight face portion comprises said topline support, said sole support, and said internal face support; and wherein said lightweight toe portion further comprises said exposed toe portion. ### Claim 9 (depends on 8) The iron golf club head of claim 8, wherein said lightweight face portion further comprises snap opening and said lightweight toe portion further comprises a tab, wherein said snap opening and said tab engage one another to secure said lightweight face portion to said lightweight toe portion. ### Claim 10 An iron golf club head comprising: a metallic portion further comprising a hosel, a heel portion, a topline portion, a sole portion, and a striking face, wherein said metallic portion creates an opening near a toe side of said metallic portion; a lightweight portion further comprising an exposed toe portion, a topline support, a sole support, and an internal face support, wherein said lightweight portion slidably engages said opening near said toe side of said metallic portion; a heel weight located at a bottom heel portion of said iron golf club head; a toe weight, located at a bottom toe portion of said iron golf club head said heel weight being retained in said iron golf club head by said metallic portion and said toe weight being retained in said iron golf club head by said lightweight portion. ### Claim 11 (depends on 10) The iron golf club head of claim 10, wherein said topline support provides structural integrity for said topline portion, said sole support provides structural integrity for said sole portion, and said internal face support provides structural integrity for said striking face. ### Claim 12 (depends on 11) The iron golf club head of claim 11, wherein said topline portion wraps around said topline support and said sole portion wraps around said sole support. ### Claim 13 (depends on 12) The iron golf club head of claim 12, wherein said striking face has a thickness of between about 1.0 mm and about 1.5 mm and said internal face support has a thickness of between about 0.8 mm and about 1.2 mm. ### Claim 14 (depends on 13) The iron golf club head of claim 13, wherein said striking face has a thickness of between about 1.1 mm and about 1.4 mm and said internal face support has a thickness of between about 0.9 mm and about 1.1 mm. ### Claim 15 (depends on 14) The iron golf club head of claim 14, wherein said striking face has a thickness of between 1.2 mm and about 1.4 and said internal face support has a thickness of about 1.0 mm. ### Claim 16 (depends on 11) The iron golf club head of claim 11, wherein said exposed toe portion of said lightweight portion is exposed externally and forms an external portion of said iron golf club head. ### Claim 17 (depends on 16) The iron golf club head of claim 16, wherein said metallic portion is made out of a steel material having a density greater than about 8.0 g/cc and said lightweight portion is made out of a composite type material having a density less than about 2.0 g/cc. ### Claim 18 (depends on 17) The iron golf club head of claim 17, wherein both of said toe weight and said heel weight are made out of a tungsten material having a density greater than about 15.0 g/cc. ### Claim 19 (depends on 11) The iron golf club head of claim 11, wherein said golf club head further comprises a viscoelastic layer sandwiched between said striking face and said internal face support.