Patent ID: 7575030

Claim:
A tubeless mounted assembly for a motor vehicle, comprising a wheel rim comprising a plurality of pieces and a tire cover comprising beads respectively mounted against axially inner and outer flanges of said rim, and a runflat device mounted around said rim between said flanges and comprising: a support ring to support said tire cover following a drop in inflation pressure inside said unit and which is divided into at least two ring sectors, each ring sector being in the shape of an arc of a circle, said ring sectors forming the support ring when circumferentially arranged end to end; and means for locking said beads against said flanges to connect said ring sectors to said beads; wherein each ring sector comprises a rigid wall which defines at least one internal volume and which defines the lateral faces of said sector, said ring sectors being mounted independently of each other to form said support ring around said rim by said lock means, which comprises at least one pair of annular wedges directed mounted on a radially inner zone of said lateral faces of said rings sectors, each annular wedge being made: (i) of a single piece applied against a lateral face of the support ring, or (ii) of wedge sectors respectively bonded to said ring sectors on a lateral face thereof, if the runflat device is anchored in the rim, wherein at least a portion of said wall of each ring sector and said wedges each has an axial section substantially in the shape of a trapezoid having only two parallel sides, the bases of which are formed by the radially inner and outer faces of said wall and said wedges respectively, so that said wedges match said lateral faces of said wall.