Sleeves e.g. air duct, connecting device, has loose flange with hooks which comprise secondary hook to be engaged with hooking unit of beveled collar, and sealed joint arranged between collars and maintained by flange

摘要

The device has a loose flange (31) movable on one of sleeves. The flange connects a base collar and a beveled collar (35), and has hooks (33). The base collar presents a flange complementary to a setback inside the flange. The collar (35) has a hooking unit. The hooks comprise a secondary hook (40) to be engaged with the unit. A sealed joint is arranged between the collars and maintained by the flange (31).