US 2010/0117441 A1Published application

Flat running device for automobile and mounted assembly including same

AssigneeHutchinson

InventorsStéphane Auvray, Stéphane Mouton

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Abstract

The invention relates to a flat running device to be fitted on a tubeless mounted assembly for an automobile, and to such a mounted assembly including said device. The flat running device (30) of the invention comprises: an annular bearing structure (31) comprising a ring having a radially outside bearing face (31a) for bearing a flat-running tyre cover (20), and at least one tightening belt (32) surrounding the ring so as to maintain the same substantially in contact with a running rim (10), at least one radial reinforcement (31b) being formed in the bearing face, the tightening belt(s) being applied on said reinforcement and being recessed relative to the bearing face. According to the invention, the bearing structure includes a means (33) for locking it in this hollow (11) by mounting the same so as to bear against a side wall (11b) of the hollow, a radially inner face (31c) of the locking means being adapted so as to conform to the axial profile of the bottom (11a) of said hollow.

Claims25

Dependent claims

A run-flat device intended to be fitted to a tubeless mounted assembly for a motor vehicle which comprises an asymmetric wheel rim of the one-piece type with a circumferential rim well and a tire cover mounted on the rim, the device being intended to support the cover following a drop in inflation pressure inside the mounted assembly, this device comprising:

an annular support structure which comprises a ring that has a radially external support face intended to support the cover under run-flat conditions, and
at least one annular clamping belt circumferentially clamping the ring in such a way as to keep it substantially in contact with the rim during running,
at least one radial indentation being formed circumferentially in said support face, said or each clamping belt being applied to this indentation and being radially set back from said support face,
characterized in that said support structure comprises means for wedging it in said rim well while mounting it bearing against at least one side wall of said well, a radially internal face of these wedging means being designed to espouse the axial profile of a bottom of said well.

1 more element

Dependencies are inferred from the claim text.