Abstract: A plug-in connection is described for the joining of pipelines and hose lines, especially for use with pipeline systems of motor vehicles. The plug-in connection consists of an inner sleeve and an outer sleeve, which hold a hose line between them, so that a pipe socket can be shoved across the outer sleeve, which can be locked to the outer sleeve by means of a protective element. Inner sleeve and outer sleeve accommodate a sealing means which, supported by the pressure force of the pressurized medium acting on the inner sleeve, is pressed against the inner wall of the pipe socket.

Abstract: A plug-in connection is described for the joining of pipelines and hose lines, especially for use with the pipeline systems of motor vehicles, consisting of an inner sleeve and an outer sleeve, which accommodate a pipeline or hose line between them, so that a pipe socket can be placed on top of the outer sleeve, which can be locked by means of a protective element to the outer sleeve. The pipe socket has, on its outer circumference, at least one radial trapezoidal indentation oriented in the lengthwise direction. The pipe socket has an opening in the region of the indentation in the circumferential direction, through which a piece of the protective element reaches, and the indentation is matched up with a trapezoidal projection on the outer sleeve, with which the protective element interacts. The plug-in connection has at least one length-minimized, width-variable, integrated projection/opening arrangement on the outer sleeve and in the pipe socket with a detent spring for single-hand operation.