Sink outlet connection

Claim 1

IN A CLAMPING ARRANGEMENT FOR SECURING A FIXTURE TO THE OUTLET OF A SINK, SAID FIXTURE HAVING FLANGED END FOR ENGAGEMENT WITH THE UPPER SURFACE OF A SINK BOTTOM AND A BODY EXTENDING DOWNWARDLY THROUGH THE OUTLET, THE COMBINATION COMPRISING A PLURALITY OF CIRCUMFERENTIALLY SPACED LUGS PERIPHERALLY SUBSTANTIALLY INTEGRALLY SECURED TO THE BODY OF SAID FIXTURE, AN UPPER RING DISPOSED CONCENTRICALLY ABOUT SAID BODY ABOVE SAID LUGS AND ROTATABLE ABOUT SAID BODY, SAID RING HAVING A DOWNWARDLY PROJECTING RIM WITH A CONTINUOUS SUCCESSION OF SERRATIONS THEREIN DEFINING A PLURALITY OF LIKE CIRCUMFERENTIALLY ADJACENT INCLINED CAMMING SURFACES, SAID RING HAVING AN OUTWARDLY FLARED ANNULAR FLANGE AT ITS UPPER END WITH A PLURALITY OF RADIAL GROOVES IN THE UNDER SURFACE THEREOF, AND A LOWER RING HAVING A PLURALITY OF LONGITUDINAL GROOVES IN THE INNER PERIPHERY THEREOF FOR PASSAGE OF THE RING OVER SAID LUGS, SAID LOWER RING HAVING A PLURALITY OF NOTCHES IN THE UNDERSIDE THEREOF FOR ENGAGEMENT BY SAID LUGS, SAID LOWER RING HAVING AN UPWARDLY PROJECTING RIM AT THE UPPER SIDE THEREOF WITH A CONTINUOUS SUCCESSION OF SERRATIONS IN THE RIM DEFINING A PLURALITY OF LIKE CIRCUMFERENTIALLY ADJACENT CAMMING SURFACES COMPLEMENTARY TO SAID CAMMING SURFACES OF THE UPPER RING AND IN END ABUTMENT THEREWITH, SAID LOWER RING HAVING A RADIALLY PROJECTING FLANGE WITH A PLURALITY OF RADIAL NOTCHES THEREIN.