VALVE FOR CONTAINER COMPRISING A PRESSURIZED GAS, IN PARTICULAR A LIQUEFIED PETROLEUM GAS, PRE-SEALING CONICAL SEAL FOR IT AND BOTTLE COMPRISING SUCH A VALVE

摘要

THE CONICAL SEAL 30 IS INTENDED TO ENSURE THE TEMPORARY WATERPROOFING, AT THE TIME OF TIGHTENING OR UNSCREWING THE APPARATUS 20 ON THE VALVE 10 OF A GAS BOTTLE. /P P IT CAN HAPPEN THAT, FOR SIGNIFICANT PRESSURES OF THE PUSH END 21, THE CONICAL SEAL 30 IS RETURNED AND REMAINS IN THIS POSITION EVEN AFTER UNSCREWING. /P P ACCORDING TO THE INVENTION, TO REMEDY TO THIS DISADVANTAGE, RADIAL ASPERITES 33 PREVENT THE SEALED CONTACT BETWEEN THE REVERSE SIDE OF THE SEAL AND THE SHOULDER OF THE VALVE. IN THIS WAY, THE INTERVAL 40 ALWAYS REMAINS IN COMMUNICATION WITH THE GAS PRESSURE WHICH ENSURES, AT THE TIME OF DISASSEMBLY, A RETURN OF THE SEAL TO ITS INITIAL POSITION BY A PURELY PNEUMATIC EFFECT.