Ventilation lock for electrical housing

摘要

The ventilation device is mounted in a bore in the housing base with a threaded part (18) extending through the bore from the housing interior, a nut part (50) screwed on to the threaded part outside the housing and a pipe passing through the device and contg. a filter insert (54). The sleeve walls of the threaded part and nut part, which are screwed together, have opposing parallel walls (40,98). A transverse channel (64) in the base lies parallel to the outer base surface (68) and has outlet openings (70,72) in the sleeve surface. A base channel (84,86) branching from the transition between the opening and transverse channels opens into the outer base surface, the transverse channel opens into the nut part's interior and the sleeve wall of the threaded part has a conically increasing cross-section (32).