Patent ID: 7918255

Claim:
A run flat device for fitting to a tubeless wheel assembly for a motor vehicle, the assembly comprising a wheel rim made up of a plurality of blocks and a tire cover having beads mounted against flanges of said rim, said device comprising: an annular support structure for mounting around said wheel rim and subdivided into at least two ring sectors juxtaposed end to end in the circumferential direction of said structure to form it, each ring sector being in the shape of an arc of a circle; and locking means for locking said beads against said flanges in order to connect said annular support structure to said beads; wherein each ring sector has at least two rigid support elements that are superposed in the radial direction of said structure and that are mutually and radially separated in pairs by a rubber-based resilient layer, the entire radially outer support element being located radially outside the radially outer face of said resilient layer, which is adapted, by shearing in the even of a lateral force being applied to said structure, to enable said radially outer support element to move axially relative to said radially inner support element.