Patent ID: 7438099

Claim:
A safety support for mounting on a rim inside a tire fitted on a vehicle, to support a tread of the tire in the event of a loss of inflation pressure, the safety support comprising: a substantially cylindrical base configured to conform to the rim; a crown with a radially outer wall configured to enter into contact with an internal wall of a crown of the tire in the event of a loss of pressure and to leave clearance therebetween at the rated operating pressure of the tire; and an annular body linking the base and the crown of the support; wherein an envelope of the radially outer wall of the support crown is defined, when the support is mounted on the rim, with f being the deflection undergone by the support mounted on the rim under a load Z, the rated load of the tire, the envelope being confined between two cylinders of revolution of radius R max and R min satisfying the following relationship: 0.2 f<R max −R min <2 f.