Patent ID: 6517115
Filing Date: 2003-02-11
Classification: F16L,Y10S

Abstract:
A quick coupling device for a tube provided with a shoulder near a free end thereof to be coupled to a rigid element, the device comprising a tubular insert possessing external means for fixing it in a bore in the rigid element and internal locking means for axially locking the tube in the insert opposing at least extraction of the tube, wherein said locking means comprise a sleeve placed inside the tubular insert and having a first end with a broad cross-section arranged to bear against an internal abutment member of the tubular insert and a second end with a narrow cross-section that is elastically deformable in a radial direction between a rest configuration that is small enough to form an abutment for said shoulder of the tube, such that the sleeve forms a spacer opposing withdrawal of the tube after it has been inserted, and an elastically deformed configuration where it is expanded to enable the shoulder of the tube to pass through during insertion thereof and wherein said second end of the sleeve is made of an uninterrupted wall which has a cross-section made up of a succession of curved arcs.