Coupling for outer surface engagement of polymeric pipe

F - Mech Eng,Light,Heat,Weapons – 16 – L

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Details

F16L 47/04 (2006.01) F16L 19/08 (2006.01) F16L 47/06 (2006.01)

Patent

CA 2144979

A coupling for engagement with the outer surface of a polymeric pipe, having a sub-assembly of a compression sleeve (24), a resilient gasket ring (18) permanently attached to the inner end of the compression sleeve (24), a gripping member (25), and a nut (30). The gasket ring (18) encounters an abutment in a socket (17) in the body (12) as the nut (30) is tightened, and further tightening of the nut (30) radially compresses the gripping member (25) so that its inwardly directed barbed projections (26) engage the outer surface of a pipe (11) to which the coupling is attached. The end of pipe (11) is freely insertable through the gripping member (25) and sleeve (24), and into the socket (17) in the body (12). There are also provided abutment surfaces within the body of the coupling and the nut which abut inner and outer surfaces (34, 35) of a flange outstanding from the outer end of the compression sleeve (24). Also disclosed is an embodiment with a transition spigot (46) having a barbed tail inserted into an end of a pipe enabling toe coupling to accommodate a range of similar but different diameter pipes.

Un raccord assurant la connexion de la surface externe de tuyaux en polymère qui comprend un sous-ensemble composé d'un manchon à compression (24), d'un anneau de joint élastique (18) fixé en permanence au bout intérieur du manchon à compression (24), d'une pièce de serrement (25), et d'un écrou (30). L'anneau de joint (18) rencontre un appui dans une douille (17) dans le corps (12) à mesure que l'écrou (30) est resseré, et un resserement plus poussé de l'écrou (30) comprime radialement la pièce de serrement (25) de façon à ce que ses aspérités barbelées dirigées vers l'intérieur (26) engagent la surface externe du tuyau (11) sur lequel le raccord est fixé. Le bout du tuyau (11) traverse librement la pièce de serrement (25) et le manchon (24), pour s'insérer dans la douille (17) et dans le corps (12). Il y a également des surfaces d'appui à l'intérieur du raccord et de l'écrou qui font toucher les surfaces internes et externes (34, 35) d'une bride qui se trouve au bout extérieur du manchon à compression (24). On voit également la représentation d'un bout mâle de transition (46) dont la tige barbelée est insérée dans le bout d'un tuyau facilitant ainsi le raccord d'extrémités, ce qui permet l'adaptation à une gamme de tuyaux semblables, mais de diamètres différents.

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