# US 2017/0280876 A1 · Lumbar support adjuster > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0280876 A1 - Document ID: US20170280876A1 - Status: Published application - Kind: A1 - Application number: 15/089,471 - Filed: 2016-04-01 - Published: 2017-10-05 - Earliest claimed: 2016-04-01 - Assignees: Exemplis LLC - Applicants: Exemplis LLC - Inventors: ADAM HUENNEKENS; Paul Devries; Peter JEFFERY; Mitchell Mulder; Ryan Dibble - Web page: https://patentgrep.com/patent/US20170280876A1 ## CPC - A47C 7/462: {adjustable by mechanical means} - A47C: CHAIRS; SOFAS; BEDS ## Abstract The disclosure herein relates to lumbar support adjustment for a chair. More specifically, the disclosure related to a lumbar support adjustment mechanism that moves forward and aft relative to the user. ## Claims ### Claim 1 A lumbar support device for a chair, comprising: a lumbar support, a seatback, a lumbar support adjustment mechanism connecting the lumbar support to the seatback; wherein the lumbar support adjustment mechanism comprises: a lumbar mount having a back end flange extending aftward and mechanical interlocks located on a surface of the back end flange for engaging the seatback and adjusting and the lumbar support fore and aft relative to the seatback and locking the lumbar support in place relative to the seatback. ### Claim 2 (depends on 1) The lumbar support device of claim 1, wherein the lumbar support comprises a lumbar support frame and a contact surface for providing lumbar support to a user's back. ### Claim 3 (depends on 2) The lumbar support device of claim 2, wherein the lumbar support frame further comprises a vertical slot through which the lumbar support attachment mechanism connects. ### Claim 4 (depends on 3) The lumbar support device of claim 3, wherein the lumbar support frame further comprises a plurality of vertical columns separated by a plurality of horizontal beams, wherein the separation of the plurality of columns forms the vertical slot ### Claim 5 (depends on 1) The lumbar support device of claim 1, wherein the seatback further comprises a housing for receiving the lumbar mount and wherein the housing further comprises mechanical interlocks located on an interior surface of the housing and wherein the mechanical interlocks interface with mechanical interlocks of the back-end flange. ### Claim 6 (depends on 5) The lumbar support device of claim 5, wherein the seatback further comprises an inner shell and an outer shell. ### Claim 7 (depends on 1) The lumbar support device of claim 1, wherein the lumbar support adjustment mechanism further comprises a vertical wall from which the back-end flange extends, and a lumbar-end flange extending orthogonally forward from the vertical wall. ### Claim 8 (depends on 7) The lumbar support device of claim 7, wherein the lumbar support adjustment mechanism further comprises a lumbar spring having an aperture through which the lumbar-end flange passes, a spring pin securing the lumbar support adjustment mechanism to the lumbar support, and a screw and nut assembly wherein the screw passes through an aperture in the back-end flange, securing the lumbar support adjustment mechanism to the seatback. ### Claim 9 (depends on 8) The lumbar support device of claim 8, wherein the back-end flange further comprises an oblong channel within which the nut is seated, and wherein the oblong channel is shaped to prevent the nut from rotating when engaged by the screw. ### Claim 10 A lumbar support adjustment mechanism for a chair comprising: a lumbar spring, a lumbar mount, further comprising: a vertical wall, a lumbar-end flange extending orthogonally forward from the vertical wall, a back-end flange extending orthogonally aftward from the vertical wall and further comprises mechanical interlocks located on a surface of the back-end flange, and a spring pin connecting the lumbar spring to the lumbar mount. ### Claim 11 (depends on 10) The lumbar support device of claim 10 further comprising a lumbar support and a seatback, wherein the lumbar support further comprises a lumbar support frame and a contact surface for providing lumbar support to a user's back. ### Claim 12 (depends on 11) The lumbar support device of claim 11, wherein the lumbar support frame further comprises a vertical slot through which the lumbar support attachment mechanism connects. ### Claim 13 (depends on 11) The lumbar support device of claim 11, wherein the seatback further comprises a housing for receiving the lumbar mount and wherein the housing further comprises mechanical interlocks located on an interior surface of the housing and wherein the mechanical interlocks interface with the mechanical interlocks of the back-end flange. ### Claim 14 (depends on 13) The lumbar support device of claim 13, wherein the seatback further comprises an inner shell and an outer shell. ### Claim 15 (depends on 10) The lumbar support device of claim 10, wherein the lumbar support adjustment mechanism further comprises a vertical wall from which the back-end flange extends, and a lumbar-end flange extending orthogonally forward from the vertical wall. ### Claim 16 (depends on 15) The lumbar support device of claim 15, wherein the lumbar spring further comprises an aperture through which the lumbar-end flange passes and a screw and nut assembly wherein the screw passes through an aperture in the back-end flange, securing the lumbar support adjustment mechanism to the seatback. ### Claim 17 (depends on 16) The lumbar support device of claim 16, wherein the back-end flange further comprises an oblong channel within which the nut is seated, and wherein the oblong channel is shaped to prevent the nut from rotating when engaged by the screw. ### Claim 18 A method for adjusting and locking a lumbar support relative to a seatback comprising the steps of: (i) connecting a lumbar support to a seatback using a lumbar support adjustment mechanism, wherein the lumbar support adjustment mechanism comprises a flange extending aftward and mechanical interlocks located on a surface of the flange for engaging the seatback, (ii) moving the lumbar support to a desired position fore or aft relative to the seatback, and (ii) locking the lumbar support in place relative to the seatback. ### Claim 19 (depends on 18) The method of claim 18, wherein the seatback further comprises a housing having mechanical interlocks on an internal surface for engaging the aftward extending flange of the lumbar support adjustment mechanism. ### Claim 20 (depends on 18) The method of claim 18 wherein locking the lumbar support in place relative to the seatback further comprises the steps of turning a screw which extends through a housing in the seatback and an aperture in the aftward extending flange, into a nut positioned in an oblong channel in the aftward extending flange.