A SYSTEM FOR CONNECTING TWO VENTILIATION DUCT SECTIONS TO EACH OTHER

摘要

A system connects two ventilation duct sections to each other in end-to-end abutting relation to form a continuous conduit for the passage of air between said sections. The system comprises a resiliently deformable spigot 6 having a lip 8, the spigot 6 being mountable to one ventilation duct section 12 extending from an open end, and a hub 5 comprising a ramp 7 mountable within an open end of the other ventilation duct section 12. The arrangement being such that when the spigot 6 and the hub 5 are mounted to respective ventilation duct sections 12, the spigot 6 is insertable into the hub 5 so that lip 8 and the ramp 7 cooperate to resiliently compress the spigot 6. Further insertion of the spigot 6 into the hub 5 causes the lip 8 to pass beyond the ramp 7 so that the spigot 6 expands to locate the lip 8 behind the ramp 7 and connect the ventilation duct sections 12 together. The hub can comprise a sealing member located in a recess in the hub, to form a seal against the surface of the spigot 6 when it is inserted.