# US 10,945,528 B1 · Chair seat board and chair including same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,945,528 B1 - Document ID: US10945528B1 - Status: Granted - Kind: B1 - Application number: 17/049,264 - Filed: 2019-07-22 - Published: 2021-03-25 - Granted: 2021-03-16 - Earliest claimed: 2018-07-30 - Applicants: Chan Wook Park - Inventors: Chan Wook Park - Web page: https://patentgrep.com/patent/US10945528B1 ## CPC - A47C 7/024: {with double seats} - A47C 7/144: {with array of movable supports} - A47C 7/185: {with a stiff, rigid support} - A47C 7/34: with springs in compression, e.g. coiled - A47C 7/405: {with double backrests} - A47C 9/002: {with exercising means or having special therapeutic or ergonomic effects} - A47C: CHAIRS; SOFAS; BEDS ## Abstract Disclosed is a chair seat board (100) and a chair (1000) to which a chair backboard (200) is coupled. The chair seat board (100) may comprise: a frame unit 40 having a plurality of frames (41, 42, 43, 44) configured in a hollow shape, respectively, and implemented to allow independent movement; and a support unit configured to support the frame unit 40 while being coupled to the frame unit (40) on a lower side of the frame unit (40). ## Claims ### Claim 1 A chair seat board (100) comprising: a frame unit (40) having a plurality of frames (41, 42, 43, 44) configured in a hollow shape, respectively, and implemented to allow independent movement; and a support unit configured to support the frame unit (40) while being coupled to the frame unit (40) on a lower side of the frame unit (40), wherein the support unit includes a first support plate (10) consisting of a first central support plate (11) and side support plates (12-1, 12-2) disposed on both sides of the first central support plate (11); a second support plate (20) coupled to an upper portion of the first support plate (10) and consisting of a second central support plate (21) and a limiting plate (22) disposed on an upper surface of one side of the second central support plate (21); and a third support plate (30) coupled to an upper portion of the second support plate (20) and consisting of a plurality of leg support plates (31, 32) and a plurality of hip support plates (33, 34) formed to correspond to the plurality of frames (41, 42, 43, 44). ### Claim 2 (depends on 1) The chair seat board (100) according to claim 1, wherein a thickness of the second central support plate (21) is implemented to increase as it progresses from one side on which the limiting plate (22) is disposed to a side of the second central support plate opposite the limiting plate. ### Claim 3 (depends on 1) The chair seat board (100) according to claim 1, wherein each of the plurality of leg support plates (31, 32) and the plurality of hip support plates (33.34) is provided with recesses (31-3, 33-3) on at least some areas, and each of the plurality of frames (41.42, 43, 44) is provided with central plates (41-2, 43-2) having central spheres (41-3, 43-3) coupled to at least some areas of a lower surface. ### Claim 4 (depends on 3) The chair seat board (100) according to claim 3, wherein the central spheres (41-3, 43-3) coupled to the central plates (41-2, 43-2) are accommodated in the recesses (31-3, 33-3), so that a coupling between the third support plate (30) and the frame unit (40) is implemented. ### Claim 5 (depends on 4) The chair seat board (100) according to claim 4, wherein the plurality of leg support plates (31, 32) and the plurality of hip support plates (33, 34) are provided with a plurality of spring groups (31-1, 31-2, 33-1, 33-2) arranged to correspond to at least some areas of borders of the plurality of frames (41, 42, 43, 44), and wherein omnidirectional movement of the central spheres (41-3, 43-3) in the recesses (31-3, 33-3) and flexible movement of the plurality of frames (41, 42, 43, 44) relative to the spring groups (31-1, 31-2, 33-1, 33-2) are combined with each other to achieve independent movement of the plurality of frames (41, 42, 43, 44). ### Claim 6 (depends on 1) The chair seat board (100) according to claim 1, further comprising a memory foam (50) configured to cover the frame unit (40) coupled to the support unit. ### Claim 7 (depends on 6) The chair seat board (100) according to claim 6, wherein the memory foam (50) is composed of a plurality of leg memory foams (51, 52) and a plurality of hip memory foams (53, 54) configured to correspond to the plurality of leg support plates (31, 32) and the plurality of hip support plates (33, 34), wherein the plurality of hip memory foams (53, 54) are implemented such that a strength of the area corresponding to a sciatic or sit-bone site is greater than that of the other areas. ### Claim 8 (depends on 7) The chair seat hoard (100) according to claim 7, wherein the plurality of leg memory foams (51, 52) are implemented such that a strength of a front-end part thereof is less than that of the plurality of hip memory foams (53, 54), and wherein an end of the front-end part of the plurality of leg memory foams (51, 52) is formed to bend downward. ### Claim 9 (depends on 1) A chair (1000) comprising: the chair seat board (100) according to claim 1: and a chair backboard (200) coupled to one side of the chair seat board (100).