Conduit joint and seal member therefor

Claim 1

IN A JOINT FOR CONCRETE CONDUIT SECTIONS, A FIRST CONDUIT SECTION HAVING A BELL END, A SECOND CONDUIT SECTION HAVING A SPIGOT END RECEIVED IN THE BELL END OF SAID FIRST CONDUIT SECTION, SAID SECTIONS HAVING A PLURALITY OF DUCTS THERETHROUGH FROM END TO END, THE DUCTS OF ONE CONDUIT SECTION BEING IN ALIGNMENT WITH THE DUCTS OF THE OTHER CONDUIT SECTION WHEN THE SECTIONS ARE ASSEMBLED IN ENDTO-END RELATION, AND A RESILIENT SEAL MEMBER BETWEEN THE ADJACENT END FACES OF SAID SPIGOT AND BELL ENDS, SAID SEAL MEMBER INCLUDING A THIN, MEMBRANE-LIKE PLANAR BODY HAVING A PLURALITY OF TUBULAR SECTIONS EXTENDING TO OPPOSITE SIDES THEREOF, SAID TUBULAR SECTIONS REGISTERING WITH AND PROJECTING INTO THE DUCTS IN SAID CONDUIT SECTIONS, SAID DUCTS BEING FLARED AT THEIR END PORTIONS AND SAID TUBULAR SECTIONS BEING EXTERNALLY TAPERED TO FIT SAID FLARED END PORTIONS OF THE DUCTS, THE INTERIOR DIMENSIONS OF SAID TUBULAR SECTIONS SUBSTANTIALLY CORRESPONDING TO THE INTERIOR DIMENSIONS OF THE DUCTS INWARDLY OF THE FLARED END PORTIONS, SAID SEAL MEMBER HAVING A PERIPHERAL FLANGE PROVIDED WITH A SEALING BEAD RECEIVED BETWEEN THE EXTERIOR OF SAID SPIGOT END OF SAID SECOND CONDUIT SECTION AND THE INTERIOR OF THE BELL END OF THE OTHER CONDUIT SECTION.