Patent ID: 7631904

Claim:
A releasable plug-in connection for a pipeline, the releasable plug-in connection comprising: a receiving part; a plug-in part which is connected to the pipeline and can be plugged into the receiving part in a joining direction, the plug-in part having a terminal end and a central axis, a sealing element interposed between the receiving part and the plug-in part; an elastic securing element which is fitted on the receiving part for securing the plug-in part to the receiving part; wherein the plug-in part has a pipe section on which there is provided an abutment, said abutment having an expanding external diameter section which expands continuously away from the terminal end and essentially to an opposite facing abutment face, the extent of the expanding external diameter section being from a point intermediate the terminal end and opposite facing abutment face to essentially the opposite facing abutment face with a largest diameter section essentially at the abutment face and the extent of the expanding external diameter section covering a substantial portion of the distance from the terminal end to the opposite facing abutment face; wherein the elastic securing element can resiliently stretch over said expanding diameter section when the plug-in part is plugged into the receiving part; wherein said abutment face, behind which the elastic securing element resiliently biases back toward an unflexed position and can latch at the end of the plug-in operation serves to support the plug-in part on the securing element to prevent unintentional release from the receiving part; wherein a flange is formed on the pipe section at the terminal end of the plug-in part, said flange forming a sealing end face against which the sealing element bears in a sealing manner in the assembled state of the plug-in connection; wherein the receiving part has an axial facing shoulder that abuts said sealing element when said sealing element is interposed between said sealing end face of said plug-in part and said axial facing shoulder of said receiving part; and wherein the abutment extends up to the flange of the pipe section at the terminal end of the plug-in part.