DEVICE FOR SEALING A FLUID CIRCULATION DUCT, SUCH AS AN AIR DUCT OR A VENTILATION OPENING

摘要

The invention relates to a sealing device (2) comprising a flap (6) which is mounted to the end of a fluid circulation duct (3) in an articulated manner between an open position in which the fluid can flow through the duct and a closed position in which the fluid is prevented form flowing through the duct. In addition, a flexible spring tongue (7) is mounted to the flap between the flap and the duct, such that it can be applied hermetically against the circumference of the mouth of the duct (3) when the flap is in the closed position and such that it controls the flow of fluid entering the duct when the flap is in the open position, by deforming as a function of the pressure inside the duct.