# US 2019/0170255 A1 · Sealing ring and seal arrangement comprising such a sealing ring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170255 A1 - Document ID: US20190170255A1 - Status: Published application - Kind: A1 - Application number: 16/194,418 - Filed: 2018-11-19 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: Carl Freudenberg KG - Applicants: Carl Freudenberg KG - Inventors: Martin Heldmann; Jens Hofmann; Guenter Hintenlang - Web page: https://patentgrep.com/patent/US20190170255A1 ## CPC - F16J 15/3284: characterised by their structure; Selection of materials - F16J 15/3228: formed by deforming a flat ring - F16J 15/3244: with hydrodynamic pumping action - F16J 15/322: supported in a direction perpendicular to the surfaces - F16J 15/3236: with at least one lip for each surface, e.g. U-cup packings - F16J 15/3268: Mounting of sealing rings - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS ## Abstract A sealing ring includes: a supporting element; and a lip seal having at least one first and one second lip seal section having sealing materials differing from one another. The first lip seal section at one end is connected to the supporting element, and at an other end has a free end on which the second lip seal section is arranged. The second lip seal section includes an elastomeric sealing material. ## Claims ### Claim 1 A sealing ring, comprising: a supporting element; and a lip seal having at least one first and one second lip seal section comprising sealing materials differing from one another, wherein the first lip seal section at one end is connected to the supporting element, and at an other end has a free end on which the second lip seal section is arranged, and wherein the second lip seal section comprises an elastomeric sealing material. ### Claim 2 (depends on 1) The sealing ring according to claim 1, wherein the second lip seal section comprises a softer sealing material than the first lip seal section. ### Claim 3 (depends on 1) The sealing ring according to claim 1, wherein the first lip seal section comprises a polymer material. ### Claim 4 (depends on 1) The sealing ring according to claim 1, wherein the first lip seal section comprises a PTFE material. ### Claim 5 (depends on 1) The sealing ring according to claim 1, wherein the first and the second lip seal section have a material bond and/or form-fitting connection. ### Claim 6 (depends on 1) The sealing ring according to claim 1, wherein the supporting element has a support core having an axial leg and a radial leg, and wherein the support core comprises a metal material. ### Claim 7 (depends on 1) The sealing ring according to claim 1, wherein the first lip seal section has a first conveyance structure on a side radially facing a surface to be sealed of a first machine element to be sealed, the conveyance structure being configured to convey a medium to be sealed. ### Claim 8 (depends on 7) The sealing ring according to claim 7, wherein the first lip seal section has a further conveyance structure on a side radially facing away from a surface to be sealed of the first machine element to be sealed. ### Claim 9 (depends on 7) The sealing ring according to claim 7, wherein the second lip seal section has a circumferential self-contained sealing bead on a side radially facing a surface to be sealed of a first machine element to be sealed and on a side axially facing away from the first lip seal section. ### Claim 10 (depends on 9) The sealing ring according to claim 9, wherein the second lip seal section has a second conveyance structure on the side radially facing a surface to be sealed of the first machine element to be sealed, the second conveying structure being configured to convey the medium to be sealed. ### Claim 11 (depends on 10) The sealing ring according to claim 10, wherein the second conveyance structure, when viewed in the axial direction, is arranged between the sealing bead and the free end. ### Claim 12 (depends on 10) The sealing ring according to claim 10, wherein the first and the second conveyance structure each have a conveyance direction that is either the same as one another or the opposite of one another. ### Claim 13 (depends on 1) A seal arrangement, comprising: the sealing ring according to claim 1; a first machine element to be sealed and a second machine element to be sealed, which are arranged concentrically to one another and with a radial separation, wherein the sealing ring is arranged in a gap formed by the separation. ### Claim 14 (depends on 13) The seal arrangement according to claim 13, wherein the lip seal sections sealingly enclose the first machine element with radial pretensioning, and wherein the supporting element sealingly contacts the second machine element under radial pretensioning. ### Claim 15 (depends on 13) The seal arrangement according to claim 13, wherein the first machine element comprises a shaft to be sealed and the second machine element comprises a housing enclosing the first machine element. ### Claim 16 (depends on 13) The seal arrangement according to claim 13, wherein that the first machine element, the second machine element, and the sealing ring delimit a space to be sealed which is filled at least partially with a medium to be sealed, and wherein the lip seal is precurved in a direction of the space to be sealed.