Particular head and seat cooperation for faucet valves

Claim 1

IN A FAUCET, THE COMBINATION OF A HOLLOW BODY HAVING A SUPPLY CONDUIT TERMINATING IN A LIQUID SUPPLY PORT, MEANS TO MOVE THE STEM TOWARDS AND FROM THE PORT, A CIRCULAR RIB ON THE BODY SURROUNDING THE PORT AND EXTENDING TOWARDS THE STEM AND PROVIDIONG AN ANNUALR SEALING EDGE SURFACE LYING IN A PLANE NORMAL TO THE DIRECTION OF MOVEMENT OF THE STEM, AN ENLARGED HEAD ON THE END OF THE STEM, SAID HEAD HAVING A DIAMETER GREATER THAN THAT OF THE RIB AND BEING PROVIDED WITH A PERIMETRAL FLANGE EXTENDING TOWARDS THE RIB AND PROVIDING A FLANGE EDGE SURFACE LYING IN A PLANE NORMAL TO THE DIRECTION OF MOVEMENT OF THE STEM AND DEFINING A CIRCULAR RECESS IN THE ENLARGED HEAD OF DIAMETER GREATER THAN THE DIAMETER OF THE RIB, THE BODY HAVING AN ANNULAR SURFACE SURROUNDING THE RIB AND LYING IN A PLANE PARALLEL TO THE PLANE OF THE EDGE SURFACE OF THE RIB AND BELOW SAID RIB EDGE SURFACE, TOGETHER WITH A GASKET OF SLIGHTLY YIELDABLE MATERIAL AND INCLUDING A BODY PORTION OF DIAMETER SUBSTANTIALLY EQUAL TO THAT OF THE PERIMETRAL FLANGE OF THE ENLARGED HEAD, AND HAVING A CENTRAL THICKNESS PORTION OF DIAMETER AND THICKNESS TO SEAL SNUGLY INTO THE CIRCULAR RECESS OF THE ENLARGED HEAD, THE PERIMETRAL PORTION OF SAID GASKET BEING PROVIDED WITH AND ANNULAR SURFACE FACING THE EDGE OF THE PERIMETRAL FLANGE OF THE ENLARGED HEAD SUBSTANTIALLY AT THE PLANE OF SAID SURFACE; SAID GASKET ALSO INCLUDING A CIRCULAR SURFACE FACING THE RIB OF THE BODY AND LYING IN A PLANE NORMAL TO THE DIRECTION OF STEM MOVEMENT AND CONSTITUTING A PRIMARY GASKET SEALING SURFACE, TOGETHER WITH A CIRCULAR FLANGE ON THE GASKET OF DIAMETER GREATER THAN THAN OF THE BODY RIB AND OF DIMENSION IN THE DIRECTION OF STEM MOVEMENT, EQUAL TO THE HEIGHT OF THE RIB MEASURED BETWEEN THE PLANE OF THE EDGE SURFACE OF THE RIB AND THE PLANE OF THE ANNULAR SURFACE OF THE BODY SURROUNDING THE RIB; TOGETHER WITH A CIRCULAR TENSION BAND SURROUNDING THE GASKET FLANGE SURFACE BETWEEN THE PERIMETRAL FLANGE OF THE ENLARGED HEAD AND A CIRCULAR LINE AROUND THE GASKET FLANGE ABOVE THE PLANE OF THE EDGE SURFACE OF THE GASKET FLANGE, SAID TENSION BAND RETAINING THE GASKET FLANGE AGAINST OUTWARD SPREAD OVER THE FLANGE AREA ENCLOSED BY SAID TENSION BAND; SAID TENSION BAND COMPRISING THE LARGER DIAMETER FLANGE OF A CIRCULAR REINFORCING ELEMENT OF Z-CROSS-SECTION, THE SMALLER DIAMETER FLANGE OF SAID REINFORCING ELEMENT BEING LOCATED BETWEEN THE CONCAVE SURFACE OF THE PRIMETRAL FLANGE OF THE ENLARGED HEAD, AND THE GASKET PORTION WHICH IS LOCATED IN THE CIRCULAR RECESS OF SUCH ENLARGED HEAD; AND THE CENTRAL PORTION OF SAID REINFORCING ELEMENT BEING LOCATED BETWEEN THE FLANGE EDGE SURFACE OF THE ENLARGED HEAD, AND THE ANNULAR THE FLANGE OF THE GASKET WHICH FACES SAID EDGE OF THE PERIMETRAL FLANGE OF THE ENLARGED HEAD.