Pipe coupling for joining pipe sections of varying size

Claim 1

A COUPLING DEVICE ADAPTED TO CONNECT TWO PIPES OF DIVERSE SIZE, THE SMALLER BEING TELESCOPED INTO THE LARGER, SAID DEVICE COMPRISING A SEALING GASKET OF J-SHAPED CROSSSECTIONAL CONFIGURATION WITH A CENTRAL FLANGE PORTION EXTENDING IN AN OUTWARD DIRECTION PERPENDICULAR WITH RESPECT TO THE LONGITUDINAL AXIS OF THE COUPLING DEVICE AND TERMINATING WITH A BEVELED END PORTION THAT EXTENDS IN THE RADIAL DIRECTION AND IN THE AXIAL DIRECTION SAID END PORTION ABUTTING AND EXTENDING TOWARD AND RADIALLY BEYOND THE END OF SAID LARGER PIPE, A TAPERED TUBULAR PORTION ATTACHED TO THE RADIALLY EXTENDING FLANGE PORTION WITH THE END THEREOF TERMINATING WITHIN THE CAVITY FORMED BY SAID LARGER PIPE, AN ANNULAR CONPRESSION GASKET OF M-SHAPED CROSS-SECTIONAL CONFIGURATION ADAPTED TO RETAIN SAID SEALING GASKET WITHIN A HALF-SECTION OF ITS BORE SO THAT THE CENTRAL FLANGE PORTION OF SAID SEALING GASKET IS IN APPROXIMATE RADIAL ALIGNMENT WITH THE CENTER OF SAID COMPRESSION GASKET, THE OTHER HALF-SECTION OF SAID COMPRESSION GASKET EXTENDING RADIALLY INWARD SO THAT IT CLOSELY SURROUNDS THE SMALLER PIPE, AND MEANS FOR JOINING SAID PIPES IN TELESCOPED SEALED RELATION INCLUDING A TUBULAR CLAMP THE INSIDE SURFACE BEING COMPLEMENTAL TO THE EXTERIOR OF SAID COMPRESSION GASKET SO THAT WHEN A CONSTRICTING FORCE IS APPLIED TO THE EXTERIOR OF SAID COMPRESSION CONTROL PORTION OF THE COMPRESSION GASKET WILL DEPRESSED CONTROL PORTION OF THE COMPRESSION GASKET WILL URGE THE RADIALLY EXTENDING PORTION OF SAID SEALING GASKEY INTO A SEALING RELATIONSHIP WITH THE EXTERIOR OF SAID SMALLER PIPE AND THE END OF SAID LARGER PIPE.