Patent ID: 9429261
Filing Date: 2016-08-30
CPC Classification: F16L

Claim Text:
1. A plug connection for fluid lines, comprising two intermateable coupling parts, which in an inserted state can be releasable locked via a locking device including two outer radial retaining bars of the two coupling parts and a retaining part, the retaining bars being adjacent in insertion direction (S) and axial (X-X) in inserted state, the retaining part having a closed annular peripheral contour, in a preassembled state the retaining part is axially and radially fixed and undetachably assembled on one of the two coupling parts and in an assembled state the retaining part axially and radially encompasses the retaining bars of the two coupling parts, the retaining part encompassing the retaining bars with at least one radially elastically moving retaining section with a C-shaped axial section, the C-shaped axial section having two collars spaced apart and axially interconnected by an attachment piece so as to be axially projectable upon each other, the collars being configured with at least one of a different size and shape in such a way that during radial elastic movement of the retaining section outward from the assembled state one of the collars releases an adjacent one of the retaining bar while the other of the collars still engages and abuts at least in some areas the other of the retaining bars, the other of the collars having a circumferentially running, radially inwardly curved attachment piece seen in axial projection protruding with respect to the one of the collars, the other of the collars differing in size and shape from the one of the collars by way of the attachment piece, wherein the collars are similarly configured collars and after preassembly of the retaining part on one of the two coupling parts as well as also after assembly with both coupling parts and during disassembly of the retaining part, the attachment piece extends over a circumferential angle of at least one coupling part that is dimensioned in such a way that a distance (A) between the attachment pieces of two diametrically opposite sides of the other collar is always smaller in a maximum spread state of the retaining part than a diameter of the coupling part against which the collar having the attachment piece abuts.