Re-usable type snap-on couplings

Claim 1

A COUPLING MEANS FOR CONNECTING COAXIALLY ADJOINING CONDUIT ENDS COMPRISING A SLEEVE OF FLEXIBLE ELASTOMERIC MATERIAL PRESENTING A CENTRAL RADIALLY INWARDLY EXTENDING BARRIER ANNULUS HAVING RADIAL WALL PORTIONS FACING EACH AXIAL DIRECTION AND A PAIR OF ANNULAR PROJECTIONS EXTENDING RADIALLY OUTWARDLY FROM THE OUTER PERIPHERY OF SAID SLEEVE IN AXIALLY SPACED RELATION WITH SAID BARRIER ANNULUS DISPOSED THEREBETWEEN; SAID SLEEVE PRESENTING SMOOTH UNINTERRUPTED INTERIOR WALL SURFACES FROM THE BARRIER TO EACH SLEEVE END; AN ANNULAR RECESS IN THE EXTERNAL PERIPHERAL SURFACE OF EACH OF SAID CONDUIT END PORTIONS, EACH OF SAID RECESSES BEING AXIALLY SPACED FROM THE RESPECTIVE CONDUIT END SURFACE SO AS TO UNDERLIE ONE OF SAID PAIR OF OUTWARD EXTENDING ANNULAR PORTIONS WHEN SAID CONDUIT END IS INSERTED INTO SAID SLEEVE IN ABUTTING RELATION TO SAID BARRIER ANNULUS AND RELEASABLE CLAMPING MEANS SURROUNDING SAID SLEEVE AND SELECTIVELY OPERABLE TO APPLY A CONSTRICTIVE RADIALLY INWARD FORCE ABOUT SAID SLEEVE WHEREBY SAID OUTWARDLY EXTENDING ANNULAR PORTIONS ARE RADIALLY INWARDLY COMPRESSED CAUSING MATERIAL OF SAID SLEEVE TO BE ELASTICALLY DEFORMED INTO AND SUBSTANTIALLY FILL SAID ANNULAR RECESSESS TO PROVIDE A FLUID TIGHT COUPLING BETWEEN SAID CONDUIT ENDS.