Reduced-weight run flat assembly comprising a pressure-effect structural support

摘要

A safety assembly ( 1 ) for a tire allowing running at reduced pressure. A rim ( 2 ) is equipped with a valve, and a tire ( 4 ) is mounted on the rim. A structural support ( 3 ) rests on the rim ( 2 ) and is enclosed in the space between the rim and the internal wall of the tire. The two axially opposed ends ( 31, 32 ) of the base ( 30 ) of the support ( 3 ) form an airtight joint with the part of the rim ( 2 ) on which they rest. The space between the rim ( 20 ) and the base of the support ( 30 ) and situated between the two airtight joints communicates with atmospheric pressure by means of a duct ( 26 ).