Abstract: A plug-in safety coupling for pressurized conduits includes a blocking element, which is mounted in a coupling housing; the blocking element includes a through bore in which a coupling plug may be introduced in a sealing manner. A pivot path of the coupling housing permits the coupling plug, being introduced into the blocking element, to pivot relative to the housing between a conducting position, in which a through-bore of the blocking element communicates with a compressed air feed bore of the housing, and a blocking position, in which the blocking element blocks the compressed air feed bore. The coupling plug and the blocking element are provided with reciprocally corresponding locking parts to effect a locked retention of the coupling plug in the blocking element.

Abstract: A plug-type safety coupling for pressures lines comprising a plug, a housing comprising a one-piece shaped part, a blocking element sealably mounted and secured within the housing, the blocking element being rotatable between a blocking position and a working position and having one of a cylindrical and a slightly conical shape. The blocking element is provided with a bore, which bore forms a bush for the plug, the bush comprising two sequential axial borings having different diameters. The material surrounding the smaller diameter axial boring forms an annular groove in communication with the larger diameter axial boring, the annular groove adapted to sealingly accommodate the plug, a seal between the plug and the bush being disposed between an outer surface of a nipple enclosed by the annular groove and an inner side surface of the plug.