Patent ID: 7404581

Claim:
A plug-in coupling comprising: a base body; an annular sealing element; a clamping ring; and an annular body which is connectable to the base body, wherein an inserted pipe end in sealing contact with the sealing element can be fixedly secured in the plug-in coupling by the clamping ring, the sealing element is arranged in an annular groove in the base body and has two sealing beads which contact an inside surface of the inserted pipe end, the annular groove of the base body has a radially outwardly directed holding body which engages in a radially inwardly arranged annular groove of the sealing element, the two sealing beads of the sealing element are substantially circular in cross-section, with their respective circular cross-sections located essentially tangential to a cylindrical inner surface of the sealing element and oriented essentially perpendicular to the cylindrical inner surface of the sealing element and parallel to a longitudinal axis of the sealing element, the two sealing beads are longitudinally separated by a connecting part having a length greater than a radius of either sealing bead circular cross-section, and the annular groove of the sealing element is arranged between the two sealing beads, outside of a circumference of either sealing bead.