Device for sealingly fixing a tube or pipe to an end coupling

The invention provides a device for fixing a tube or hose to an end coupling, including an element fixed by its internal face over at least a part of its length to the external face of the tube or hose, said element being adapted so as to form at its free end, distant from that fixed to the tube or hose, an annular peripheral lip having a valve forming end and cooperating with the external surface of the end coupling so as to define a chamber communicating by said end with the inner volume of the tube or hose and end coupling so that a fluid flowing through the end coupling and the tube fills said chamber so as to apply said sealing lip against the coupling with a force which is all the higher the greater the pressure in the chamber, the pressure in the chamber increasing with the pressure of the fluid flowing through the end coupling and tube or hose, but not substantially decreasing when the pressure flowing through the end coupling and hose decreases.