Coupling for a fluid conduit

Claim 1

A HOSE COUPLING COMPRISING A BODY HAVING A CYLINDRICAL CHAMBER AND A RADIALLY, INWARDLY-EXTENDING END WALL, A SUBSTANTIALLY AXIALLY-ALIGNED APERTURE IN THE END WALL, A TUBULAR COUPLING MEMBER FORMED OF METAL AND TELESCOPICALLY DISPOSED THROUGH SAID APERTURE FOR UNRESTRAINED AXIAL MOVEMENT THEREIN, THE INNER END OF SAID MEMBER HAVING AN ENLARGEMENT FORMED BY AN ENLARGED WALL THICKNESS THROUGHOUT ITS ENTIRE PERIPHERY, THE OUTER PERIPHERY OF SAID ENLARGEMENT TAPERING TOWARD THE OUTER END OF SAID MEMBER FROM SUBSTANTIALLY A MAXIMUM DIAMETER THEREOF TO A MINIMUM DIAMETER AT THE OUTER PERIPHERY OF THE WALL OF SAID MEMBER, THE INNER TERMINAL END OF SAID ENLARGED WALL PORTION OF SAID MEMBER BEING INWARDLY TAPERED TO A POINT SUBSTANTIALLY IN RADIAL ALIGNMENT TO SAID MAXIMUM DIAMETER, THE OUTER END PORTION OF SAID MEMBER BEING THREADED, A TUBULAR PRESSURE ELEMENT FORMED OF METAL AND MOUNTED ON SAID COUPLING MEMBER WITH A CLOSE SLIDING FIT AND CONSTRUCTED AND ARRANGED TO TELESCOPE INTO THE BORE OF THE HOSE, SAID ELEMENT HAVING AT LEAST ITS INNER END PORTION DEFORMABLE, SAID INNER END PORTION BEING INITIALLY POSITIONED ADJACENT SAID OUTER MINIMUM DIAMETER OF SAID TAPER ON SAID ENLARGEMENT AND THE OTHER END ABUTTING THE INNER SURFACE OF THE END WALL OF THE BODY, AND MEANS COACTING WITH SAID THREADED PORTION OF THE COUPLING MEMBER AND THE OUTER SURFACE OF SAID END WALL AND PROVIDING A REACTION FORCE AGAINST THE END WALL OF THE BODY TO MOVE SAID COUPLING MEMBER AXIALLY OUTWARD WITH RESPECT TO SAID BODY TO CAUSE SAID ENLARGEMENT TO MOVE INTO SAID DEFORMABLE INNER END PORTION OF THE PRESSURE ELEMENT AND THEREBY RADIALLY EXPANDING SAID DEFORMABLE END PORTION AND A CORRESPONDINGLY ALIGNED PORTION OF THE HOSE TO CAUSE THE ALIGNED PORTION OF THE HOSE TO BE FIRMLY SQUEEZED AND PRESSED AGAINST THE CYLINDRICAL WALL OF THE CHAMBER OF SAID BODY, AND SAID MEMBER BEING RETAINED IN SAID PRESSURE ELEMENT BY THE DEFORMED PORTION THEREOF, FORMING BY SAID DEFORMATION A METAL-TOMETAL SEAL BETWEEN THE MEMBER AND PRESSURE ELEMENT, AND SAID MEANS SERVING TO FIRMLY SECURE SAID COUPLING IN FIXED, SEALED RELATION TO THE END PORTION OF THE HOSE WITH THE BODY, COUPLING MEMBER AND PRESSURE ELEMENT IN FIXED RELATION TO EACH OTHER.