Patent ID: 7841629

Claim:
A plug-in coupling for fluidic systems, comprising: a housing ( 1 ) and a plug ( 2 ) having an annular groove, the plug ( 2 ) being insertable into the housing ( 1 ) by inserting a plug stem ( 3 ) of the plug ( 2 ) into a receiving opening ( 4 ) of the housing ( 1 ) so that at least one circumferential seal ( 5 , 5 a , 5 b ) provides a seal therebetween, the plug ( 2 ) having a collar ( 10 ) expanded in diameter with respect to a remaining body portion of the plug ( 2 ) and providing a stop for the outer housing part ( 1 b ) of the housing ( 1 ); a locking device locking the plug ( 2 ) in the housing ( 1 ) against relative displacement thereto, the locking device including two latching elements ( 6 , 7 ) in the form of snap rings spaced from each other along said plug ( 2 ) and held in associated annular grooves of the plug ( 2 ) and a latching shoulder ( 8 ) arranged on the housing ( 1 ) and interacting with at least one of said latching elements ( 6 , 7 ), said housing ( 1 ) having a two-part construction to provide an inner housing part ( 1 a ) and an outer housing part ( 1 b ), the outer housing part ( 1 b ) being releasably connected to the inner housing part ( 1 a ) so that the outer housing part ( 1 b ) essentially surrounds the inner housing part ( 1 a ), wherein the latching shoulder ( 8 ) is provided in an entry region ( 4 a ) of the receiving opening ( 4 ) at one end of the outer housing part ( 1 b ).