Improvement in assemblies comprising a run flat insert

摘要

The system (1`) has a foam insert (5`) placed inside a volume defined by an internal wall of a tire (2`) and a rim (3`). The insert disposed in a compartment (A) is in communication with the atmosphere via ducts (44`, 46`) and isolated from the rest of the space inside the tire casing by lateral walls (302`). The walls ensure an airtight seal between the wall of compartment and an element of the internal wall of the rim. The duct has a mobile check valve (45`) which adopts the closed position during travel and is capable of being brought into the open position between two travel phases.