Patent ID: 8240717

Claim:
An insertion coupling, comprising: an insertion part which has a circumferential retaining rib; a sleeve part which is provided with at least one locking element to latch with the retaining rib, said sleeve part further including a housing tab which extends in an arc around a longitudinal axis of the sleeve part and an actuation element, wherein the locking element, the housing tab, and the actuation element are formed as a single piece, wherein the locking element is arranged to be moved radially between a position which constitutes latching with the retaining rib and a position which releases this latching by means of the actuation element, said sleeve part further having housing ribs which define a recess of the sleeve part, wherein the actuation element is arranged in said recess; said housing tab and said sleeve part each have having bearing faces formed thereon which extend obliquely to the longitudinal axis of the sleeve part and which face one another, said bearing faces cooperating whereby one of said bearing faces bears against the other of said bearing faces so as to radially fix the housing tab and thus the locking element attached thereto, thereby maintaining an engaged state of the sleeve part and the insertion part under an influence of internal pressure; and gaps arranged axially on both sides between the housing tab and the sleeve part, one of said gaps facing a free end of the sleeve part, said one gap being formed by the oblique bearing faces.