Drain line coupling for plain end glass pipe

Claim 1

IN A COUPLING PARTICULARLY ADAPTED TO CONNECT A PLAIN END GLASS PIPE TO A GLASS DRAIN AND THE LIKE, (A) A RESILIENT SLEEVE HAVING (B) SPACED UPPER AND LOWER INTERNAL CYLINDRICAL WALL PORTIONS, (C) A PLASTIC SPACER HAVING SPACED OPPOSITELY EXTENDING AXIAL FLANGES RECESSED WITHIN SAID SLEEVE AND HAVING (D) A SPACER BEAD EXTENDING RADIALLY INWARDLY OF SAID OPPOSITELY EXTENDING CYLINDRICAL WALL PORTIONS AND ADAPTED TO BE ABUTTED BY A DRAIN PIPE AT ONE END AND A PLAIN END PIPE AT THE OPPOSITE SIDE THEREOF, TO FORM A SEAL FOR SAID PIPES, (E) A SCARFED NON-RESILIENT PLASTIC SLEEVE RECESSED WITHIN SAID RESILIENT SLEEVE BETWEEN ONE OF SAID AXIAL FLANGES AND SAID UPPER WALL PORTION AND FORMING A CONTINUATION OF SAID UPPER WALL PORTION WHEN IN ITS EXTENDED CONDITION, (F) AND MEANS COMPRESSING SAID RESILIENT SLEEVE AND DRAWING SAID SCARFED CONTRACTIBLE NON-RESILIENT SLEEVE INTO CLAMPING ENGAGEMENT WITH THE PLANE END PIPE COMPRISING (G) A SPLIT SHELL ENCIRCLING SAID RESILIENT SLEEVE AND HAVING (H) SPACED OPPOSITELY FACING FRUSTO-CONICAL WALL PORTIONS CONVERGING TOWARD THE AXIS OF SAID RESILIENT SLEEVE AS THEY EXTEND ALONG SAID SLEEVE AND DEFORMING SAID RESILIENT SLEEVE AND CONTRACTING SAID SCARFED CONTRACTIBLE NON-RESILIENT SLEEVE INTO SEALING ENGAGEMENT WITH THE PLAIN END PIPE UPON THE DRAWING OF THE ENDS OF SAID SHELL TOWARD EACH OTHER, SAID OPPOSITELY FACING FRUSTO-CONICAL WALL PORTIONS BEING OF DIFFERENT LENGTHS AND THE LONGER OF SAID WALL PORTIONS BEING SPACED FROM THE OUTSIDE OF SAID CONTRACTIBLE NON-RESILIENT SLEEVE BY SAID RESILIENT SLEEVE AND IN RADIAL REGISTRY WITH SAID NON-RESILIENT SLEEVE THROUGHOUT THE LENGTH THEREOF AND TAPERING AT A RELATIVELY SMALL ANGLE WITH RESPECT TO THE LONGITUDINAL AXIS OF THE PLAIN END GLASS PIPE.