# US 11,906,050 B2 · Radial shaft sealing ring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,050 B2 - Document ID: US11906050B2 - Status: Granted - Kind: B2 - Application number: 17/734,421 - Filed: 2022-05-02 - Published: 2022-11-03 - Granted: 2024-02-20 - Earliest claimed: 2021-05-03 - Assignees: Bruss Sealing Systems GmbH - Applicants: Bruss Sealing Systems GmbH - Inventors: Bjoern Lindener; Juergen Grundt; Tobias Saberniak; Manfred Brand - Web page: https://patentgrep.com/patent/US11906050B2 ## CPC - F16J 15/3284: characterised by their structure; Selection of materials - F16J 15/3228: formed by deforming a flat ring - H01B 1/22: the conductive material comprising metals or alloys - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract A radial shaft sealing ring is designed to electrically conductively connect a shaft to a component which is stationary relative to the shaft. The radial shaft sealing ring has a supporting body and a sealing element attached thereto having a sealing portion which makes contact with the shaft. The material composition of the sealing element and/or a protective lip comprises at least one base material made from at least one polymer and one or more fillers, with at least one electrically conductive filler being provided. ## Claims ### Claim 1 A radial shaft sealing ring, comprising: a supporting body; and a sealing element attached thereto having a sealing portion which is configured to make contact with a shaft, wherein the sealing element comprises at least one base material made of at least one polymer and one or more fillers, with at least one electrically conductive filler being provided, wherein the radial shaft sealing ring is configured to electrically conductively connect a shaft to a component which is stationary relative to the shaft, wherein the sealing element has an electrically conductive surface coating in addition to an electrically conductive main body of the corresponding sealing element. ### Claim 2 (depends on 1) The radial shaft sealing ring according to claim 1, further comprising a protective lip that is configured to make contact with the shaft, wherein the protective lip comprises a second at least one base material made of a second at least one polymer and a second one or more fillers, with a second at least one electrically conductive filler being provided. ### Claim 3 (depends on 2) The radial shaft sealing ring according to claim 2, further comprising an electrically conductive contact ring for making electrical contact with the sealing element and/or the protective lip, wherein the sealing element and/or the protective lip is attached to the supporting body and/or to the electrically conductive contact ring via an adhesive. ### Claim 4 (depends on 2) The radial shaft sealing ring according to claim 2, wherein the radial shaft sealing ring comprises an electrically conductive contact ring for making electrical contact with the sealing element and/or the protective lip. ### Claim 5 (depends on 4) The radial shaft sealing ring according to claim 4, wherein the electrically conductive contact ring has at least one electrically conductive penetrating element which penetrates into the sealing element and/or into the protective lip in an installed state. ### Claim 6 (depends on 4) The radial shaft sealing ring according to claim 4, wherein an electrically conductive contacting element is provided for establishing contact between the electrically conductive contact ring and the component which is stationary relative to the shaft. ### Claim 7 (depends on 2) The radial shaft sealing ring according to claim 2, wherein the supporting body has at least one electrically conductive, protruding penetrating part which in an installed state penetrates into the sealing element and/or into the protective lip. ### Claim 8 (depends on 2) The radial shaft sealing ring according to claim 2, wherein the supporting body has, on an inner circumference of the supporting body, at least one electrically conductive extension that, in an installed state, makes contact with the sealing element and/or the protective lip. ### Claim 9 (depends on 2) The radial shaft sealing ring according to claim 2, wherein the protective lip has a second electrically conductive surface coating in addition to a second electrically conductive main body of the corresponding protective lip. ### Claim 10 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the at least one electrically conductive filler has metal, metallised and/or metal-coated particles, microspheres, microtubes, and/or fibres. ### Claim 11 (depends on 10) The radial shaft sealing ring according to claim 10, wherein a proportion by weight of the at least one electrically conductive filler is in a range between 1% and 25%. ### Claim 12 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the at least one electrically conductive filler has silver, silver-plated and/or silver-coated particles, microspheres, microtubes, and/or fibres. ### Claim 13 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the at least one electrically conductive filler comprises an electrically conductive filler made of electrically conductive carbon. ### Claim 14 (depends on 13) The radial shaft sealing ring according to claim 13, wherein a proportion by weight of the electrically conductive carbon is in a range between 1% and 15%. ### Claim 15 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the one or more fillers comprises at least one filler made of fibres. ### Claim 16 (depends on 15) The radial shaft sealing ring according to claim 15, wherein a proportion by weight of the at least one filler made of fibres is in the range between 1% and 20%. ### Claim 17 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the one or more fillers comprises at least one filler made of a metal oxide or a metal oxide mixture. ### Claim 18 (depends on 17) The radial shaft sealing ring according to claim 17, wherein a proportion by weight of the at least one made of filler metal oxide is in a range between 1% and 10%. ### Claim 19 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the one or more fillers comprises at least one filler made of tin oxide and/or indium tin oxide. ### Claim 20 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the at least one base material comprises a fluoropolymer, PTFE, FKM, an elastomer, fluorinated thermoplastic, and/or a PTFE-based polymer or a corresponding copolymer. ### Claim 21 (depends on 1) The radial shaft sealing ring according to claim 1, wherein a proportion by weight of the at least one base material is in a range between 50% and 99%. ### Claim 22 (depends on 1) The radial shaft sealing ring according to claim 1, wherein the one or more fillers comprises at least one filler made of dendritic silver. ### Claim 23 (depends on 22) The radial shaft sealing ring according to claim 22, wherein a proportion by weight of the at least one filler made of dendritic silver is in a range between 1% and 10%.