# US 11,309,775 B2 · Fiber grounding brush assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,775 B2 - Document ID: US11309775B2 - Status: Granted - Kind: B2 - Application number: 17/064,207 - Filed: 2020-10-06 - Published: 2021-01-21 - Granted: 2022-04-19 - Earliest claimed: 2018-03-20 - Assignees: Aktiebolaget Skf - Applicants: Aktiebolaget Skf - Inventors: Mathieu Hubert; Igor Dorrestijn; Karl Preis - Web page: https://patentgrep.com/patent/US11309775B2 ## CPC - H02K 11/40: Structural association with grounding devices - F16C 41/002: {Conductive elements, e.g. to prevent static electricity} - H01R 39/24: Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres - H01R 39/385: {Means for mechanical fixation of the brush holder} - H01R 39/39: wherein the brush is fixedly mounted in the holder - H01R 39/64: Devices for uninterrupted current collection - H02K 5/145: {Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes} - H02K 13/10: Arrangements of brushes or commutators specially adapted for improving commutation - H02K 15/14: Casings; Enclosures; Supports - Y10T 29/5313: Means to assemble electrical device - Y10T 29/53143: Motor or generator - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A grounding brush assembly includes a plurality of conductive fibers extending from at least one support, a mounting plate having a first side and a second side and an opening configured to surround a rotatable motor shaft having an axis of rotation, and a plurality of tabs disposed in a circle around the periphery. Each of the tabs extends axially from the first side of the mounting plate and radially toward or away from the axis of rotation to define with an adjacent portion of the first side of the mounting plate a U-shaped bracket. The at least one support is secured against the first side of the mounting plate by the plurality of tabs. ## Claims ### Claim 1 A grounding brush assembly comprising: at least one support and a plurality of conductive fibers extending from the at least one support; a mounting plate having a first side and a second side and an opening configured to surround a rotatable motor shaft having an axis of rotation, the opening having a periphery; and a plurality of tabs disposed in a circle around the periphery, each of the tabs extending axially from the first side of the mounting plate and radially toward or away from the axis of rotation to define with an adjacent portion of the first side of the mounting plate a U-shaped bracket; wherein the at least one support is secured against the first side of the mounting plate by the plurality of tabs. ### Claim 2 (depends on 1) The grounding brush assembly according to claim 1, wherein the at least one support extends along an arc of a circle. ### Claim 3 (depends on 2) The grounding brush assembly according to claim 2, wherein the mounting plate includes a peripheral flange substantially perpendicular to a plane of the mounting plate and located radially outward from the plurality of tabs. ### Claim 4 (depends on 2) The grounding brush assembly according to claim 2, wherein the at least one support comprises a unitary channel member having a U-shaped cross section, the channel member comprising a first side wall connected to a second side wall by a bight, and wherein the first and second side walls of the unitary channel are crimped against the conductive fibers to secure the conductive fibers in the at least one channel. ### Claim 5 (depends on 4) The grounding brush according to claim 4, wherein the at least one support includes a wire in the channel positioned such that the conductive fibers extend between the wire and the channel. ### Claim 6 (depends on 5) The grounding brush according to claim 5, wherein the wire has a first end and a second end and wherein the first end is spaced circumferentially from the second end. ### Claim 7 (depends on 1) The grounding brush according to claim 1, wherein the plurality of conductive fibers comprises a first subset of the plurality of conductive fibers coated with a first polymer sheath and a second subset of the plurality of conductive fibers different than the first subset of the plurality of conductive fibers coated with a second polymer sheath. ### Claim 8 (depends on 1) The grounding brush according to claim 1, wherein the plurality of conductive fibers comprise carbon fibers. ### Claim 9 (depends on 1) The grounding brush according to claim 1, wherein the at least one support is electrically conductive and in electrical contact with the conductive fibers. ### Claim 10 (depends on 1) The grounding brush according to claim 1, wherein each of the plurality of conductive fibers is bent into a U-shape around a wire inside the at least one support. ### Claim 11 (depends on 1) The grounding brush according to claim 1, wherein each of the tabs comprises an integral folded over portion of the mounting plate bent out of a plane of the mounting plate. ### Claim 12 A grounding brush assembly comprising: at least one support and a plurality of conductive fibers extending from the at least one support; a mounting plate having a first side lying in a plane and a second side and an opening configured to surround a rotatable motor shaft having an axis of rotation, the opening having a periphery; and a plurality of tabs disposed in a circle around the periphery, each of the tabs comprising an integral portion of the mounting plate bent out of the plane and folded to form a portion of a radially inwardly facing channel, wherein the at least one support is mounted in the channel formed by the plurality of tabs. ### Claim 13 (depends on 12) The grounding brush assembly according to claim 12, wherein the at least one support extends along an arc of a circle. ### Claim 14 (depends on 13) The grounding brush according to claim 13, wherein the at least one support includes a wire in the channel positioned such that the conductive fibers extend between the wire and a wall of the channel. ### Claim 15 (depends on 14) The grounding brush according to claim 14, wherein the wire has a first end and a second end and wherein the first end is spaced circumferentially from the second end. ### Claim 16 (depends on 12) The grounding brush according to claim 12, wherein the plurality of conductive fibers comprises a first subset of the plurality of conductive fibers coated with a first polymer sheath and a second subset of the plurality of conductive fibers different than the first subset of the plurality of conductive fibers coated with a second polymer sheath. ### Claim 17 (depends on 12) The grounding brush according to claim 12, wherein the plurality of conductive fibers comprise carbon fibers. ### Claim 18 (depends on 12) The grounding brush according to claim 12, wherein the at least one support is electrically conductive and in electrical contact with the conductive fibers. ### Claim 19 (depends on 12) The grounding brush according to claim 12, wherein each of the plurality of conductive fibers is bent into a U-shape around a wire inside the at least one support. ### Claim 20 (depends on 12) The grounding brush assembly according to claim 12, wherein the mounting plate includes a peripheral flange substantially perpendicular to the plane and located radially outward from the plurality of tabs.