# US 10,309,823 B2 · Thin weighing scale with a sandwich structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,823 B2 - Document ID: US10309823B2 - Status: Granted - Kind: B2 - Application number: 14/991,522 - Filed: 2016-01-08 - Published: 2017-07-13 - Granted: 2019-06-04 - Earliest claimed: 2016-01-08 - Assignees: Withings - Applicants: Withings - Inventors: Eric Carreel; Thibaut Retiere; Antoine Joussain; Paul Edouard Juan; Xavier Debreuil - Web page: https://patentgrep.com/patent/US10309823B2 ## CPC - G01G 3/1402: {Special supports with preselected places to mount the resistance strain gauges; Mounting of supports} - G01G 19/44: for weighing persons - G01G 21/23: Support or suspension of weighing platforms (G01G21/24 takes precedence) - G01G 21/244: {combined with flexure-plate fulcrums (flexure-plate fulcrums G01G21/07)} - G01G: WEIGHING (sorting by weighing B07C5/16) ## Abstract A thin weighing scale having a thickness of less than 25 mm, comprising a first rigid bottom plate, extending along a reference plane defined by a first direction and a second direction, a second rigid top plate, at least four load cells 4, interposed between the first and second rigid plates, a set of linkages comprising arms, some arms extend in the first direction and some other arms extend in the second direction, each arm having an elongated shape with a first end attached to the first rigid plate and a second end rigidly connected to the second rigid plate, whereby a movement is provided along a third direction, the set of linkages preventing relative movement between first and second rigid plates along the first and second direction. ## Claims ### Claim 1 A thin weighing scale having an overall thickness of less than 25 mm, comprising: a first rigid plate, extending along a reference plane defined by a first direction and a second direction, wherein the first rigid plate forms a bottom plate, a second rigid plate, arranged parallel and at distance from the first rigid plate, with no direct contact between first and second rigid plates, wherein the second rigid plate forms a top plate and comprises a display, at least four load cells, each interposed between the first and second rigid plates, a set of linkages comprising at least four arms, among which at least two arms extend in the first direction and at least two other arms extend in the second direction, each arm having an elongated shape with a first end attached to the first rigid plate and a second end rigidly connected to the second rigid plate, whereby the second rigid plate is movably mounted with regard to the first rigid plate, substantially along a third direction perpendicular to the reference plane, the set of linkages preventing substantive relative movement between first and second rigid plates along the first and second direction, wherein there is provided at least two stop arrangements with a part rigid with the first rigid plate and a counterpart rigid with the second rigid plate, said part and counterpart coming into contact with one another to provide a limitation of relative movement along the third direction when lifting the scale by one of the first and second rigid plate. ### Claim 2 (depends on 1) The weighing scale of claim 1, wherein the set of linkages comprises at least two linking units, the at least four arms are formed in the linking units. ### Claim 3 (depends on 2) The weighing scale of claim 2, wherein the set of linkages comprises four linking units, each linking unit comprising two arms, one extending in the first direction and one extending in the second direction. ### Claim 4 (depends on 3) The weighing scale of claim 3, wherein each linking unit is provided with a stop arrangement. ### Claim 5 (depends on 1) The weighing scale of claim 1, wherein the scale exhibits a side length, wherein each of the arms extend over more than ⅓ of the side length. ### Claim 6 (depends on 1) The weighing scale of claim 1, wherein the overall thickness of the weighing scale is less than 20 mm. ### Claim 7 (depends on 1) The weighing scale of claim 1, wherein the first and second rigid plates are flat and have a constant thickness. ### Claim 8 (depends on 1) The weighing scale of claim 1, wherein the second rigid plate is made of glass. ### Claim 9 (depends on 1) The weighing scale of claim 1, wherein the arms are at the vicinity of the borders of the scale and the arms cover the peripheral area next to one another. ### Claim 10 (depends on 1) The weighing scale of claim 1, wherein the bottom plate is slightly smaller in the first direction and the second direction than the top plate. ### Claim 11 (depends on 1) The weighing scale of claim 1, wherein the linking units are L-shaped or Square-shaped and the internal corner lodges the corresponding load cell. ### Claim 12 A thin weighing scale having an overall thickness of less than 25 mm, comprising: a first rigid plate, extending along a reference plane defined by a first direction and a second direction, wherein the first rigid plate forms a top plate and comprises a display, a second rigid plate, arranged parallel and at distance from the first rigid plate, with no direct contact between first and second rigid plates, wherein the second rigid plate forms a bottom plate, at least four load cells, each interposed between the first and second rigid plates, a set of linkages comprising at least four arms, among which at least two arms extend in the first direction and at least two other arms extend in the second direction, each arm having an elongated shape with a first end attached to the first rigid plate and a second end rigidly connected to the second rigid plate, whereby the second rigid plate is movably mounted with regard to the first rigid plate, substantially along a third direction perpendicular to the reference plane, the set of linkages preventing substantive relative movement between first and second rigid plates along the first and second direction, wherein there is provided at least two stop arrangements with a part rigid with the first rigid plate and a counterpart rigid with the second rigid plate, said part and counterpart coming into contact with one another to provide a limitation of relative movement along the third direction when lifting the scale by the first plate. ### Claim 13 (depends on 12) The weighing scale of claim 12, wherein the set of linkages comprises at least two linking units, the at least four arms are formed in the linking units. ### Claim 14 (depends on 12) The weighing scale of claim 12, wherein the set of linkages comprises four linking units, each linking unit comprising two arms, one extending in the first direction X and one extending in the second direction Y. ### Claim 15 (depends on 12) The weighing scale of claim 12, wherein each linking unit is provided with a stop arrangement 3. ### Claim 16 (depends on 12) The weighing scale of claim 12, wherein the overall thickness of the weighing scale is less than 20 mm. ### Claim 17 (depends on 12) The weighing scale of claim 12, wherein the arms are at the vicinity of the borders of the scale and the arms cover the peripheral area next to one another. ### Claim 18 (depends on 12) The weighing scale of claim 12, wherein the first and second rigid plates are flat and have a constant thickness.