Patent ID: 9657878
Date: 2017-05-23
CPC Classifications: F16L,Y10T

Claim:
1. A plug connection for connecting lines for pressurized liquids or gases, comprising: a first plug connector having an insertion end and a fixing end lying axially opposite, a second plug connector having an insertion end and a fixing end lying axially opposite, and the second plug connector can be inserted by its insertion end in the first plug connector via its insertion end, a detent spring fastened to the first plug connector which, in a closed position on the first plug connector and when the second plug connector is inserted, engages in a radially extending groove in an external face of the second plug connector via at least one retaining portion so that the second plug connector inserted in the first plug connector is prevented from becoming loose, and a radially extending bevel ramp for the at least one retaining portion of the detent spring between the insertion end and the groove of the second plug connector, wherein the detent spring in the closed position on the first plug connector is configured to be moved from a locked position into an unlocked position, wherein in the locked position the at least one retaining portion is blocked relative to the first plug connector to prevent a movement radially outwards, wherein in the unlocked position, movement of the at least one retaining portion radially outwards is unblocked, wherein a release device which can be selectively activated is disposed on the first plug connector, wherein the release device when deactivated enables the detent spring to be positioned in the locked position and the release device when activated is configured to hold the detent spring in the unlocked position, wherein the detent spring is essentially disposed on an external face of the first plug connector and comprises at least one arm, which arm extends through a radially extending slot in a part-portion of the first plug connector into an inner region of the first plug connector when the detent spring is closed and forms the at least one retaining portion, wherein the slot has a recess or wider region facing away from the insertion end of the first plug connector in one of its two end regions for accommodating the at least one arm of the detent spring, wherein the recess or the wider region extends across less than half the longitudinal extension of the slot, wherein the release device is essentially disposed on the external face of the first plug connector and comprises a ring rotatable along the longitudinal extension of the slot, and wherein the ring has two differently recessed portions in the region of the recess of the slot towards the fixing end of the first plug connector as viewed in the axial direction, and by rotating the ring, either the deeper recessed portion can be moved above the recess so that the recess is exposed and the release device is deactivated or the less deeply recessed portion can be moved above the recess so that the recess is covered and the release device is activated.