# US 11,078,963 B2 · Bearing bush > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,078,963 B2 - Document ID: US11078963B2 - Status: Granted - Kind: B2 - Application number: 16/798,488 - Filed: 2020-02-24 - Published: 2020-09-03 - Granted: 2021-08-03 - Earliest claimed: 2019-02-28 - Assignees: Carl Freudenberg KG - Applicants: Carl Freudenberg KG - Inventors: Frank Schoenberg; Matthias Hauer; Christoph L. Klingshirn; Wojciech Kokoszynski; Randolph Gaa; Stephen Joyce; Joram Wiggers; Dean Morrison; Simon Watling; Juergen Emig - Web page: https://patentgrep.com/patent/US11078963B2 ## CPC - F16C 33/20: Sliding surface consisting mainly of plastics (F16C33/22 - F16C33/28 take precedence) - F16C 33/74: of sliding-contact bearings - F16C 17/02: for radial load only - F16C 29/084: {fixed to the carriage or bearing body movable along the guide rail or track} - F16C 29/02: Sliding-contact bearings - F16C 2208/10: Elastomers; Rubbers - F16C 2208/60: Polyamides [PA] - F16C 2240/60: Thickness, e.g. thickness of coatings - F16C 2326/24: Steering systems, e.g. steering rods or columns - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract A bearing bush includes at least one sealing element and one bearing element. The sealing element is provided with at least one sealing lip. The bearing element is substantially tubular. The bearing element includes a plurality of protrusions extending in the axial direction on the outer circumference. The inner diameter of the bearing element is larger in the sections corresponding to the protrusions than in the remaining sections. ## Claims ### Claim 1 A bearing bush comprising: at least one sealing element comprising an elastomeric material and an integrated spring; and at least one bearing element, wherein the at least one sealing element is provided with at least one sealing lip, wherein the at least one bearing element is substantially tubular, the at least one bearing element comprising a plurality of protrusions extending in an axial direction on an outer circumference of the at least one bearing element, and wherein an inner diameter of the at least one bearing element is larger in sections corresponding to the protrusions than in remaining sections, wherein the spring is located in a circumferential recess of the at least one bearing element to secure the at least one seal to the at least one bearing element. ### Claim 2 (depends on 1) The bearing bush according to claim 1, wherein a wall thickness of the at least one bearing element is eight to twelve times smaller than an outer diameter of the at least one bearing element. ### Claim 3 (depends on 1) The bearing bush according to claim 1, wherein the inner diameter of the at least one bearing element changes continuously along an inner circumference of the at least one bearing element. ### Claim 4 (depends on 1) The bearing bush according to claim 1, wherein an inner diameter of the at least one bearing element changes sinusoidally in a circumferential direction. ### Claim 5 (depends on 1) The bearing bush according to claim 1, wherein the at least one bearing element has four to twelve protrusions. ### Claim 6 (depends on 1) The bearing bush according to claim 1, wherein a height of the protrusions corresponds in each case to between 0.9% and 1.5% of an outer diameter of the at least one bearing element. ### Claim 7 (depends on 1) The bearing bush according to claim 1, wherein the protrusions each extend over 4% to 10% of the outer circumference of the at least one bearing element. ### Claim 8 (depends on 1) The bearing bush according to claim 1, wherein the protrusions comprise ribs. ### Claim 9 (depends on 1) The bearing bush according to claim 1, wherein an inner diameter of the at least one bearing element increases or decreases by up to 0.2% of a mean inner diameter, viewed along an inner circumference of the at least one bearing element. ### Claim 10 (depends on 1) The bearing bush according to claim 1, wherein the at least one bearing element comprises plastic. ### Claim 11 (depends on 1) The bearing bush according to claim 1, wherein the at least one sealing lip projects in the axial direction relative to the bearing bush. ### Claim 12 A bearing bush comprising: at least one sealing element and one bearing element, wherein the sealing element is provided with at least one sealing lip, the bearing element is substantially tubular, the bearing element comprises a plurality of protrusions extending in the axial direction on the outer circumference, and the inner diameter of the bearing element is larger in the sections corresponding to the protrusions than in the remaining sections, wherein a wall thickness of the bearing element is eight to twelve times smaller than the outer diameter of the bearing element. ### Claim 13 A bearing bush comprising: at least one sealing element; and at least one bearing element, wherein the at least one sealing element is provided with at least one sealing lip, wherein the at least one bearing element is substantially tubular, the at least one bearing element comprising a plurality of protrusions extending in an axial direction on an outer circumference of the at least one bearing element, and wherein an inner diameter of the at least one bearing element is larger in sections corresponding to the protrusions than in remaining sections, wherein the at least one sealing element has a form-locked connection with the at least one bearing element, and wherein a wall thickness of the at least one bearing element is eight to twelve times smaller than an outer diameter of the at least one bearing element.