# US 10,502,405 B2 · Electrically conducting sandwich panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,405 B2 - Document ID: US10502405B2 - Status: Granted - Kind: B2 - Application number: 15/574,725 - Filed: 2016-05-20 - Published: 2018-05-17 - Granted: 2019-12-10 - Earliest claimed: 2015-05-22 - Assignees: Pixlum - Applicants: Pixlum - Inventors: Philippe Jolly - Web page: https://patentgrep.com/patent/US10502405B2 ## CPC - F21V 23/06: the elements being coupling devices {, e.g. connectors} - B32B 3/08: characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)} - B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12} - B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)} - B32B 5/18: characterised by features of a layer {of} foamed material - B32B 7/025: Electric or magnetic properties - B32B 7/14: applied in spaced arrangements, e.g. in stripes - B32B 13/08: of paper or cardboard - B32B 15/046: {of foam} - B32B 15/10: of wood - B32B 15/14: next to a fibrous or filamentary layer - B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} - B32B 21/02: {the layer being formed} of fibres, chips, or particles {, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard} - B32B 21/06: of paper or cardboard - B32B 29/007: {next to a foam layer} - B32B 29/02: next to a fibrous or filamentary layer - B32B 33/00: Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class - B32B 37/1292: {selectively, e.g. in stripes, in patterns (B32B37/0076 takes precedence)} - E04C 2/043: {of plaster (E04C2/049 takes precedence)} - E04C 2/26: composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups {(of cement and mineral fibres E04C2/04)} - E04C 2/284: at least one of the materials being insulating - E04C 2/292: composed of insulating material and sheet metal - F21V 19/0025: {the fastening means engaging the conductors of the light source, i.e. providing simultaneous fastening of the light sources and their electric connections} - F21V 21/002: making direct electrical contact, e.g. by piercing (F21V21/35 takes precedence) - B32B 2250/05: 5 or more layers - B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA - B32B 2262/067: Wood fibres - B32B 2262/101: Glass fibres - B32B 2262/108: Rockwool fibres - B32B 2266/02: Organic - B32B 2266/0228: Aromatic vinyl resin, e.g. styrenic (co)polymers - B32B 2266/0278: Polyurethane - B32B 2307/202: Conductive - B32B 2307/206: Insulating - B32B 2307/72: Density - B32B 2307/732: Dimensional properties - B32B 2311/24: Aluminium - B32B 2315/18: Plaster - B32B 2457/00: Electrical equipment - B32B 2607/00: Walls, panels - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S) - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract An electrically conductive sandwich panel (10) supplies at least one electrical device to be pushed into the panel. The sandwich panel (10) has two electrically conductive layers (13, 15) insulated from each other and a layer (11) formed by a board (12, 14) insulated from said electrical layers. The board has two sheets (111, 112) of cardboard enclosing an electrically insulating material, such as plaster. Connectors are used to connect the electrically conductive layers to a power supply. The panel may be screw-fastened on a support by means of suitable screws and may be fitted with a suitable electrical device. A punch tool facilitates pushing the electrical device into the panel. ## Claims ### Claim 1 An electrically conductive sandwich panel, wherein said sandwich panel comprises in the following order: a first layer formed of a board that comprises two sheets of cardboard enclosing an electrically insulating material; a second layer of electrically insulating material; a third layer of electrically conductive material; a fourth layer of electrically insulating material; a fifth layer of electrically conductive material; and a sixth layer of electrically insulating material. ### Claim 2 (depends on 1) A sandwich panel according to claim 1, wherein the second and third layers, as well as the fourth and fifth layers, are bonded together adhesively by depositing lines of adhesive with a regular quantity of adhesive along each line. ### Claim 3 (depends on 1) A sandwich panel according to claim 1, wherein at least one of the electrically conductive layers comprises two metal sheets, and a sheet of elastic material enclosed between said metal sheets. ### Claim 4 (depends on 1) A sandwich panel in accordance with claim 1, wherein said sandwich panel is further fitted with at least one electrical device which has one or two connection pins designed to be pushed into the panel and carrying two electrical contacts, the two electrical contacts being distributed on the or each of said pins in such a manner that, when the pin(s) is/are pushed into the panel, one of the electrical contacts touches one of the electrically conductive layers, without touching the other layer, which is touched by the other electrical contact. ### Claim 5 (depends on 4) A sandwich panel according to claim 4, wherein the second layer of electrically insulating material is of thickness that is at least equal to the diameter of the or each pin of the electrical device pushed into the panel. ### Claim 6 (depends on 1) A sandwich panel in accordance with claim 1, characterized in that said sandwich panel is further fitted with two connectors, one of the connectors being suitable for connecting one of the electrically conductive layers to one terminal of a power supply, and the other connector being suitable for connecting the other electrically conductive layer to the other terminal of the power supply; and in that each connector presents a U-shape, the free end of each branch being pointed and each branch of the U-shape being slotted longitudinally from its free end to the connection zone between said branch and the end wall of the U-shape. ### Claim 7 (depends on 6) A sandwich panel according to claim 6, wherein each branch of the connector is pushed into an edge face of the sandwich panel so that the branch portions that extend on either side of the slot of said branch are driven respectively into the fourth and sixth layers, or respectively into the second and fourth layers, sandwiching the third or the fifth electrically conductive layer, said third or fifth electrically conductive layer being engaged in the slot and being in electrical contact with the edges of the corresponding slot. ### Claim 8 (depends on 7) A sandwich panel according to claim 7, wherein the density of the material of the second, fourth, and sixth layers is less than 300 kg/m3. ### Claim 9 (depends on 8) A sandwich panel according to claim 8, wherein the branches and the end wall of the U-shape forming each connector are flat. ### Claim 10 (depends on 1) A sandwich panel in accordance with claim 1, wherein said sandwich panel is further fitted with means for fastening said sandwich panel on a support, said fastener means comprising a drywall screw that presents a screw head and a metal shank comprising both a threaded end portion and also a smooth portion between said head and the threaded end portion, said smooth portion presenting an electrically insulating coating, preferably of color that is different to the color of the screw shank that is coated therewith. ### Claim 11 (depends on 10) A sandwich panel according to claim 10, wherein the screw presents a diameter that is less than the thickness of the fourth layer. ### Claim 12 (depends on 10) A sandwich panel according to claim 10, wherein said smooth portion is of length that is suitable for passing through the electrically conductive layers, while leaving a portion of the thread of the screw engaged in the sixth layer in order to hold the sandwich panel bearing against the support in which the screw is engaged. ### Claim 13 An assembly comprising: a sandwich panel in accordance with any preceding claim; at least one electrical device that has one or two connection pins designed to be pushed into the sandwich panel; and a punch tool comprising a grip body designed to be gripped by the hand of an operator, and one or two punches of the same length that are pointed at their free ends and of elongate shape. ### Claim 14 (depends on 13) An assembly according to claim 13, wherein the diameter of the punches is greater than or equal to the diameter of the pin(s) of the electrical device. ### Claim 15 (depends on 1) A sandwich panel in accordance with claim 1, wherein said electrically insulating material is plaster. ### Claim 16 (depends on 1) A sandwich panel in accordance with claim 1, wherein said at least one electrical device is a lighting device.