Nozzle for attaching flexible sheath on e.g. simple flow-type ventilation unit for building, has thread provided on outer surface and including variable step, which decreases towards nozzle end that is provided to be received in unit

摘要

The nozzle (10) has a thread (14) provided on an outer surface. The thread is provided with a variable step. The step decreases towards a nozzle end (10a) that is provided to be received in a ventilation unit. The thread includes a triangular, square or hemispherical section, and is provided on a cylindrical zone (10c) and a circular or oblong section of the nozzle. The thread is discontinuously designed. A portion (10d) having a reduced external diameter forms a groove, in which a clamp is received. Clips (12) enable fixing of the nozzle on the ventilation unit. An independent claim is also included for a ventilation unit.