Abstract: The present invention relates to a run flat device for fitting to a tubeless wheel assembly for a motor vehicle, and to such a wheel assembly incorporating the device. A device of the invention comprises: an annular cover support structure subdivided into at least two ring sectors that are circumferentially juxtaposed; and locking means for locking the beads against the flanges to connect the support structure to the beads.

Abstract: A run flat device for use in a wheel assembly comprises a wheel rim made of a plurality of blocks and a tire cover having beads mounted against flanges of the rim. The device includes an annular support structure for mounting around the rim to support the cover, the structure subdivided in at least two ring sectors to form the structure by juxtaposition in the circumferential direction thereof, and means for locking the beads against the flanges to connect the ring sectors to the beads. Each ring sector comprises at least two rigid support elements superposed in the radial direction of the structure and separated in pairs by respective rubber-based resilient layers, the layers adapted to shear based on a lateral force applied to the structure to enable the radially outer support element to be displaced axially relative to the radially inner support element.

Abstract: The present invention concerns a runflat device for a tubeless mounted assembly for a motor vehicle and an assembly incorporating said device. A device in accordance with the invention for a unit comprises a wheel rim having a plurality of pieces and a tire cover comprising beads mounted against the flanges of the rim, the device comprising: a support ring for mounting around the rim to support the tire cover following a drop in inflation pressure and divided into at least two ring sectors; and means for locking said beads against the flanges to connect the sectors to the beads. The device is such that each ring sector comprises a rigid wall which defines at least one internal volume and which defines the lateral faces of the ring sector.

Abstract: A device is fitted into a well of a one-piece wheel rim so as to prevent a tire fitted onto the rim from rolling off this rim. A process for manufacturing this device is disclosed as is a fitted assembly for a motor vehicle comprising the rim, the cover and the device. The device has a belt having two ends and a catching blocks for connecting the ends together, which is intended to clamp the belt of annular shape around the rim well, and this device is such that the belt includes a plurality of filling elements, spaced apart between the ends, which elements are designed to at least partly fill the well and are connected together via at least one flexible linking element intended to form an annular sector around the well.

Abstract: A run flat device for use in a wheel assembly comprises a wheel rim made of a plurality of blocks and a tire cover having beads mounted against flanges of the rim. The device includes an annular support structure for mounting around the rim to support the cover, the structure subdivided in at least two ring sectors to form the structure by juxtaposition in the circumferential direction thereof, and means for locking the beads against the flanges to connect the ring sectors to the beads. Each ring sector comprises at least two rigid support elements superposed in the radial direction of the structure and separated in pairs by respective rubber-based resilient layers, the layers adapted to shear based on a lateral force applied to the structure to enable the radially outer support element to be displaced axially relative to the radially inner support element.

Abstract: The present invention relates to a run flat device for fitting to a tubeless wheel assembly for a motor vehicle, and to such a wheel assembly incorporating the device. A device of the invention comprises: an annular cover support structure subdivided into at least two ring sectors that are circumferentially juxtaposed; and locking means for locking the beads against the flanges to connect the support structure to the beads.

Abstract: The present invention concerns a runflat device for a tubeless mounted assembly for a motor vehicle and an assembly incorporating said device. A device of the invention comprises an asymmetrical one-piece type rim comprising a drop center with two lateral walls and a tire cover mounted on the rim, the device being designed to be mounted in the drop center and comprising: a support ring divided into independent ring sectors having two lateral faces; and an annular clamping belt adapted to be mounted on and to bear on a radially inner bearing zone of one lateral face of the ring to wedge each ring sector in the drop center; and in which the device is such that the belt comprises means for exerting a lateral clamping force and a radial clamping force on the bearing zone so that said belt clamps said ring sectors against one of said lateral walls and against said drop center, bearing on the other lateral wall.

Abstract: The present invention concerns a runflat device for a tubeless mounted assembly for a motor vehicle and an assembly incorporating said device. A device in accordance with the invention for a unit comprises a wheel rim having a plurality of pieces and a tire cover comprising beads mounted against the flanges of the rim, the device comprising: a support ring for mounting around the rim to support the tire cover following a drop in inflation pressure and divided into at least two ring sectors; and means for locking said beads against the flanges to connect the sectors to the beads. The device is such that each ring sector comprises a rigid wall which defines at least one internal volume and which defines the lateral faces of the ring sector.

Abstract: The present invention relates to a device designed to be fitted into a well of a one-piece wheel rim so as to prevent a tire cover fitted onto said rim from rolling off this rim, to a process for manufacturing this device and to a fitted assembly for a motor vehicle comprising said rim, said cover and said device. A device according to the invention comprises a belt having two ends and a connecting means for connecting said ends together, which means is intended to clamp said belt of annular shape around the rim well, and this device is such that said belt includes a plurality of filling elements, spaced apart between said ends, which elements are designed to at least partly fill said well and are connected together via at least one flexible linking element intended to form an annular sector around said well.

Abstract: The present invention concerns a runflat device for a tubeless mounted assembly for a motor vehicle and an assembly incorporating said device. A device in accordance with the invention for a unit comprises a wheel rim having a plurality of pieces and a tire cover comprising beads mounted against the flanges of the rim, the device comprising: a support ring for mounting around the rim to support the tire cover following a drop in inflation pressure and divided into at least two ring sectors; and means for locking said beads against the flanges to connect the sectors to the beads. The device is such that each ring sector comprises a rigid wall which defines at least one internal volume and which defines the lateral faces of the ring sector.

Abstract: The present invention concerns a runflat device for a tubeless mounted assembly for a motor vehicle and an assembly incorporating said device. A device of the invention comprises an asymmetrical one-piece type rim comprising a drop center with two lateral walls and a tire cover mounted on the rim, the device being designed to be mounted in the drop center and comprising: a support ring divided into independent ring sectors having two lateral faces; and an annular clamping belt adapted to be mounted on and to bear on a radially inner bearing zone of one lateral face of the ring to wedge each ring sector in the drop center; and in which the device is such that the belt comprises means for exerting a lateral clamping force and a radial clamping force on the bearing zone so that said belt clamps said ring sectors against one of said lateral walls and against said drop center, bearing on the other lateral wall.

Abstract: A method of lightening a run-flat device for a motor vehicle wheel, in particular having a separable flat rim, the method consisting in configuring the run-flat device in a sandwich structure comprising a rigid inner annular portion, an intermediate annular portion of flexible or elastically deformable material, and a rigid outer annular portion, in such a manner that in run-flat mode, all of the forces transmitted by the rigid outer portion are distributed over the entire circumference of the intermediate portion, thereby enabling the thickness of the intermediate portion to be reduced and enabling the run-flat device to be made lighter in weight. The invention also provides a run-flat device implementing the above method.

Abstract: The invention provides a runflat device for a motor vehicle, the device comprising a ring for mounting inside a tire on a one-piece non-standard wheel rim that presents a drop center, an inner flange and an outer flange, said ring being made as at least two sectors each having a radially inner zone and a radially outer zone, wherein the sectors of the ring are independent of one another, and wherein each sector is fixed to the rim via its radially inner zone.

Abstract: A runflat system for a motor vehicle, comprising a non-standard one-piece rim having at least a first peripheral cavity or drop center to enable a tire to be mounted on the rim, and a runflat device for mounting on the rim inside the tire, said device being constituted by a rigid ring split into at least two circularly arcuate elements or sectors, wherein the rim has at least one second peripheral cavity which is separated from the first cavity by an intermediate peripheral ridge, wherein each sector of the ring has a radially inner portion for being received in the second cavity of the rim, and wherein the system also comprises means for fixing the sectors in the second cavity of the rim.

Abstract: A runflat system for a motor vehicle, comprising a non-standard one-piece rim having at least a first peripheral cavity or drop center to enable a tire to be mounted on the rim, and a runflat device for mounting on the rim inside the tire, said device being constituted by a rigid ring split into at least two circularly arcuate elements or sectors, wherein the rim has at least one second peripheral cavity which is separated from the first cavity by an intermediate peripheral ridge, wherein each sector of the ring has a radially inner portion for being received in the second cavity of the rim, and wherein the system also comprises means for fixing the sectors in the second cavity of the rim.

Abstract: The invention provides a runflat device for a motor vehicle, the device comprising a ring for mounting inside a tire on a one-piece non-standard wheel rim that presents a drop center, an inner flange and an outer flange, said ring being made as at least two sectors each having a radially inner zone and a radially outer zone, wherein the sectors of the ring are independent of one another, and wherein each sector is fixed to the rim via its radially inner zone.