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 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 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 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. According to the invention, the sectors are interconnected by connection means comprising a male member secured to one of the circumferential ends of each sector and removably mounted in a female member formed in the facing end of the adjacent sector, the male member comprising a projection that is terminated by an anchor tab, the female member being formed by a slot having a radially-lower zone and a radially-upper zone of widths that are respectively greater than and less the width of the tab, the upper zone being adapted to receive said projection axially locked in a position for anchoring the tab.
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. According to the invention, the sectors are interconnected by connection means comprising a male member secured to one of the circumferential ends of each sector and removably mounted in a female member formed in the facing end of the adjacent sector, the male member comprising a projection that is terminated by an anchor tab, the female member being formed by a slot having a radially-lower zone and a radially-upper zone of widths that are respectively greater than and less the width of the tab, the upper zone being adapted to receive said projection axially locked in a position for anchoring the tab.
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 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 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:
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.