Quick-release coupling for hoses and the like

Claim 1

IN A QUICK-RELEASE CONDUIT COUPLING, A FEMALE COUPLING SECTION COMPRISING A TUBULAR CASING FORMED WITH AN ANNULAR INTERNAL VALVE SEAT, A VALVE MEMBER BETWEEN SAID SEAT AND AN END OF SAID CASING AXIALLY DISPLACEABLE WITHIN SAID CASING BETWEEN A FIRST AXIAL POSITION WHEREIN SAID MEMBER ENGAGES SAID SEAT AND A SECOND AXIAL POSITION CLOSER TO SAID END WHEREIN SAID MEMBER IS SPACED FROM SAID SEAT AND FORMS THEREWITH AN ANNULAR CLEARANCE COMMUNICATING WITH THE BORE OF SAID CASING, SPRING MEANS IN SAID CASING BEARING UPON SAID VALVE MEMBER FOR URGING IT TOWARD SAID SEAT, SAID VALVE MEMBER BEING FORMED WITH A TUBULAR PORTION AXIALLY EXTENDING WITHIN SAID BORE TOWARD THE OPPOSITE END OF SAID CASING, A SEALING RING OF RESILIENTLY DEFORMABLE MATERIAL MOVABLY DISPOSED WITHIN SAID BORE IN CONTACT WITH THE WALL THEREOF BETWEEN SAID TUBULAR PORTION AND SAID OPPOSITE END OF SAID CASING, AND A SLEEVE AXIALLY DISPLACEABLE IN SAID BORE ADJACENT SAID RING BETWEEN THE LATTER AND SAID OPPOSITE END, SAID TUBULAR PORTION AND SAID RING HAVING CONFRONTING SEALING SURFACES PROJECTING INWARDLY BEYOND THE INNER WALL OF SAID SLEEVE INTO THE PATH OF A MALE COUPLING SECTION INSERTABLE INTO SAID CASING THROUGH SAID OPPOSITE END WHEREBY SAID SEALING RING IS COMPRESSIBLE AGAINST SAID PORTION AND SAID CASING BY THE INSERTABLE MALE COUPLING SECTION.