Patent ID: 7828338

Claim:
A coupling assembly comprising: pipe sockets of fluid-holding parts to be joined, wherein the pipe sockets are each provided with a locking rib that is coaxial with a center axis of the pipe sockets, behind each locking rib a groove being formed and each locking rib having a conical front flank that is coaxial with the center axis and a radial rear flank, wherein the front flank of one of the locking ribs is located opposite the front flank of the other locking rib, and the rear flank of at least one of the locking ribs forms one of the walls of the adjacent groove, and with a steel spring band which is largely circularly curved over more than 240° and whose axial ends have inwardly directed flanges with an inner edge that has the approximate form of a circular arc and is coaxial with the center axis, the flanges engaging behind the locking ribs and being interrupted at least on an axial side of the spring band, and wherein the pipe sockets are partially fitted into each other, and the parts of the pipe sockets that are fitted together are sealed from each other by at least one gasket, wherein the front flanks of the locking ribs enclose an angle α smaller than 50° with the center axis, wherein the radius of the smallest circumference of the front flanks of the locking ribs is smaller than the inner radius of the flanges of the spring band, wherein the axial width of the flanges corresponds to the width of the groove holding the flanges, and wherein the spring band is noncorroding.