Coupling having an o-ring retainer

Claim 1

THE COMBINATION IN A BOSS AND FITTING ASSEMBLY; OF A FITTING HAVING A RADIALLY DISPOSED FLANGE AND PROJECTING CENTRALLY THEREOF A MOUNTING EXTENSION MEMBER, A BOSS HAVING AN OPENING RECEIVING SUCH EXTENSION MEMBER, SAID FLANGE AND SAID BOSS HAVING OPPOSING APPROXIMATELY PARALLEL SURFACES AND SAID BOSS HAVING A TAPER SURFACE INTERCONNECTING THE SAID OPPOSING SURFACE THEREON AND THE SAID OPENING THEREIN, AND A METALLIC O-RING RETAINER COMPRISING A FLAT ANNULAR BODY INTERMEDIATE SAID BOSS AND FITTING, THE OUTER PERIPHERY OF THE BODY BEING FRMED TO INTERENGAGE THE OUTER PERIPHERY OF THE FLANGE ON SAID FITTING AND THE INNER PERIPHERY BEING LOCATED THEREBY APPROXIMATELY AT THE JOINT OF SAID OPPOSING SURFACE ON SAID BOSS AND SAID TAPER SURFACE, SAID OUTER PERIPHERY OF SAID BODY BEING FORMED WITH A PLURALITY OF PORTIONS HAVING DETENT MEANS YIELDINGLY TO GRIP THE OUTER PERIPHERY OF SAID FLANGE, AND A HOLLOW METALLIC O-RING CONTAINED BY AND WITHIN THE INNER PERIPHERY OF THE BODY TO BE ALIGNED WITH SAID TAPER SURFACE, SAID O-RING EXCEEDING IN DIAMETER THE THICKNESS OF SAID BODY WHEREBY RELATIVE ADVANCE OF SAID FITTING AND SAID BOSS UNTIL LIMITED BY SAID BODY COMPRESSES SAID O-RING ON TO SAID TAPER SURFACE ESTABLISHING A SEAL BETWEEN SAID TAPER SURFACE AND THE SAID OPPOSING SURFACE ON THE FLANGE.