Rotating sealing device and sealing ring for such device

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.