# US 9,435,437 B2 · Rotating sealing device and sealing ring for such device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,437 B2 - Document ID: US9435437B2 - Status: Granted - Kind: B2 - Application number: 14/234,831 - Filed: 2012-07-25 - Published: 2014-07-03 - Granted: 2016-09-06 - Earliest claimed: 2011-08-02 - Assignees: Nexter Mechanics - Applicants: Emmanuel Tajan - Inventors: Emmanuel Tajan - Web page: https://patentgrep.com/patent/US9435437B2 ## CPC - F16J 15/48: influenced by the pressure within the member to be sealed - B60C 23/00318: {on the wheels or the hubs} - B60C 23/00345: {Details of the rotational joints} - B60C 23/00354: {Details of valves} - B60C 23/00363: {Details of sealings} - F16J 15/18: with stuffing-boxes for elastic or plastic packings - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES ## Abstract The invention relates to rotating sealing device for the passage of a fluid, including at least one seal positioned between a fixed support and a crown mounted able to rotate with respect to the support. This device is characterized in that the seal is constituted by a ring mounted able to slide in a groove in the fixed support and which incorporates a front face intended to come into contact with a bearing surface of the rotating crown, the incorporating on each of its internal and external cylindrical surfaces at least one ring-shaped groove intended to accommodate an O-ring seal. The ring can, additionally, by pressed against the bearing surface by positioning means exerting a thrust force on the rear face of the ring. The invention applies in particular for a system to inflate the tires of vehicles. ## Claims ### Claim 1 A rotating sealing device for the passage of a fluid, in particular for a system to inflate a tire of a vehicle, the rotating sealing device comprising: at least one seal positioned between a fixed support and a rotating crown mounted that (i) is integral with a wheel rim and (ii) is able to rotate with respect to the fixed support, the at least one seal comprising a ring mounted that is able to slide in a groove in the fixed support and which incorporates a front face intended to come into contact with a bearing surface of the rotating crown that is integral with the wheel rim, the ring being able to be pressed against the bearing surface by positioning means exerting a thrust force on a rear face of the ring, wherein the positioning means are constituted by fluid pressure applied to the rear face of the ring through an opening in the fixed support, wherein the ring incorporates on each of its internal and external cylindrical surfaces at least one ring-shaped groove intended to accommodate an O-ring seal, and wherein the ring comprises at least one bore that links the rear face of the ring and the front face of the ring; a cannula mounted in the at least one bore of the ring, wherein a length of the cannula extends axially within the at least one bore of the ring such that the cannula is able to slide axially within the at least one bore and conduct fluid therein. ### Claim 2 (depends on 1) The rotating sealing device according to claim 1, wherein the at least one bore enables a passage of a fluid pressure, through the ring, between the fixed support and the rotating crown. ### Claim 3 (depends on 2) The rotating sealing device according to claim 2, wherein the front face incorporates a circular median channel into which the at least one bore opens out. ### Claim 4 (depends on 1) The rotating sealing device according to claim 1, wherein the positioning means comprises spring means placed between the rear face of the ring and the fixed support. ### Claim 5 (depends on 4) The rotating sealing device according to claim 4, wherein the spring means comprises at least one spring washer. ### Claim 6 (depends on 4) The rotating sealing device according to claim 4, wherein the spring means comprises at least one O-ring housed in a circular groove arranged in the rear face of the ring. ### Claim 7 (depends on 2) The rotating sealing device according to claim 2, wherein the fluid pressure can be applied via a non-return valve and a pressure regulator, a certain pressure level being thus maintained between the fixed support and the rear face of the ring. ### Claim 8 (depends on 7) The rotating sealing device according to claim 7, wherein the ring incorporates a calibrated leak orifice connecting the ring-shaped groove and an exterior. ### Claim 9 (depends on 1) A sealing ring intended to be implemented in a rotating sealing device according to claim 1, the sealing ring incorporating a front face intended to come into contact with a rotating bearing surface and a rear face which is intended to receive a thrust force supplied by positioning means, wherein the sealing ring incorporates on each of internal and external cylindrical surfaces of the sealing ring at least one ring-shaped groove intended to accommodate an O-ring seal. ### Claim 10 (depends on 9) The sealing ring according to claim 9, wherein the at least one bore opening out on the front face into a circular median channel. ### Claim 11 (depends on 10) The sealing ring according to claim 10, wherein the sealing ring incorporates a ring-shaped rear part thinner than a ring-shaped front part, the surface area of the rear face being equal to that of a bottom of the circular median channel in the front face. ### Claim 12 (depends on 9) The sealing ring according to claim 9, wherein at least a part of the sealing ring comprises an organic material with a low coefficient of friction, such as polytetrafluoroethylene, a material with high graphite content. ### Claim 13 (depends on 9) The sealing ring according to claim 9, wherein the sealing ring incorporates a metallic body onto which a bushing of an organic material with a low coefficient of friction is fixed. ### Claim 14 (depends on 1) The rotating sealing device according to claim 1, wherein the rotating crown comprises two annular-shaped cages.