Flow controlling device

Claim 1

A FLOW CONTROLLING AND TRANSMITTING DEVICE COMPRISING A FIRST CYLINDRICAL CHAMBER ADAPTED TO BE CONNECTED ON THE UPSTREAM SIDE OF A FLUID CONDUIT, A SECOND CYLINDRICAL CHAMBER COMMUNICATING WITH SAID FIRST CHAMBER AND ADAPTED FOR CONNECTION TO THE DOWNSTREAM SIDE OF A FLUID CONDUIT, AN ANNULAR FLANGE AT THE JUNCTURE BETWEEN SAID CHAMBERS, SAID FLANGE BEING CYLINDRICAL IN SHAPE AND OF SMALLER DIAMETER THAN SAID FIRST CHAMBER, THEREBY TO DEFINE A RECESS OUTWARDLY THEREOF, A SEALING MEMBER, SAID SEALING MEMBER INCLUDING A FIRST ANNULAR PORTION IN SAID RECESS, A SECOND PORTION OVERLYING THE UPSTREAM SIDE OF SAID FLANGE, AND A THIRD PORTION RADIALLY INWRDLY OF SAID FLANGE, WHEREBY SAID FLANGE RETAINS SAID SEALING MEMBER, SAID SECOND PORTION OF SAID SEALING MEMBER HAVING AN ANNULAR BEAD, SAID ANNULAR BEAD PRESENTING A ROUNDED CONVEX SURFACE ON THE UPSTREAM SIDE THEREOF, A VALVE MEMBER IN SAID FIRST CHAMBER, SAID VALVE MEMBER HAVING A SURFACE DEFINED BY A SPHERICAL SEGMENT, SAID SURFACE BEING IN ENGAGEMENT WITH SAID BEAD, SAID VALVE MEMBER HAVING A STEM EXTENDING OUTWARDLY FROM SAID SURFACE SAID CHAMBER HAVING A WALL HAVING AN APERTURE THROUGH WHICH SAID STEM PASSES, SAID STEM BEING SMALLER IN TRANSVERSE DIMENSION THAN THE TRANSVERSE DIMENSION OF SAID APERTURE, WHEREBY SAID VALVE MEMBER HAS FREEDOM FOR LIMITED FLOATING MOVEMENT WITH RESPECTIVE TO SAID SEALING MEMBER, AND AN ADDITIONAL SEALING MEANS FOR PRECLUDING LEAKAGE FROM SAID CHAMBER AROUND SAID STEM.