Patent ID: 6328352
Filing Date: 2001-12-11
Classification: F16L

Abstract:
A pipe coupling for connecting a first pipe to a second pipe, each of said pipes having unprofiled end sections, said pipe coupling comprising:a first annular sealing ring and a second annular sealing ring, in a clamped position, each of said sealing rings holding the unprofiled pipe end section of one of said pipes in a sealed manner, each of said sealing rings having an axially inner face and an axially outer face;a clamping clip surrounding both of said sealing rings, said clamping clip having a clip strap having a first end and a second end, a first clamping jaw formed at said first end, a second clamping jaw formed at said second end, said clamping jaws being drawn together by a tensioning device thereby reducing a diameter of said clamping clip, said clip strap having radially inwardly directed projecting flanges on each of its axial ends;a retention device being disposed radially over the major part of the circumference of both of said sealing rings, said retention device having at least one interruption extending in the circumferential direction; andan annular sleeve being disposed radially within said retention device, said sleeve having end portions which are bent obliquely outwardly toward said sealing rings, an inner surface of each of said end portions resting against said axially inner face of one of the sealing rings;wherein, said retention device has two radially inwardly open, circumferentially extending grooves of approximately V-shape in cross-section, said V-shaped grooves being interrupted to match said interruptions in said retention device, an inner surface of one side wall of each of said grooves resting against an outer surface of the mutually facing sides of said bent end portions of said sleeve, and in a clamped position, an inner surface of the other side wall of each of said V-shaped grooves exerting an axial force on said axially outer face of each of said sealing rings.