Patent ID: 7506899

Claim:
A coupling system for fluid carrying tubes having a first end portion for insertion into the coupling system and having an inner surface and an outer surface, the coupling system comprising: an insert for reception within the first end portion of the tube, the insert comprising a cylindrical body having an inner surface and an outer surface, the inner surface defining a fluid passage through the insert, and the outer surface being configured such that it is capable of engaging the inner surface of the tube wherein a predetermined threshold of force beyond that of normal use conditions of the coupling system is required to separate the insert from the tube; a coupling defining a socket for receiving the insert and first end portion of the tube, the socket having gripping fingers and a seal, the gripping fingers engaging the outer surface of the tube to restrain removal of the tube and insert from the coupling, and the seal engaging the outer surface of the tube to provide an at least substantially sealed interconnection therebetween; and a resistance portion of the outer surface of the insert being configured to engage the gripping fingers to restrict separation of the insert from the coupling.