Patent ID: 6241292
Filing Date: 2001-06-05
Classification: F16L

Abstract:
A coupling device for metal pipes with a packing structure, said coupling device comprising:a cup-joint featuring a side-ring at one end and a confining face on an inner face of the side-ring;a packing bushing having two rims featuring an indented ring of packing fortifiers around one of the two rims;a padding bushing having two rims featuring a converging ending at one rim and an indented ring of fortifiers at the other rim;a bridging connector featuring a threaded heading at one end and a guiding face inside the bridging connector so that when said cup joint is secured to said bridging connector the indented ring of fortifiers of said packing bushing holds the indented ring of fortifiers of the padding bushing with the two said bushings coupled together and the guiding face of the bridging connector pushes the converging face of the padding bushing and the padding bushing in turn squeezes the fortifier ring of the packing bushing against the confirming face of the side ring of the cup-joint to clasp and seal a metal pipe inserted into the cup-joint.