Patent ID: 6571834
Filing Date: 2003-06-03
Classification: F16K,F17C,Y10T

Abstract:
A gas charging device for charging a gas cylinder with fresh gas, the gas cylinder having a valve assembly including an outlet nozzle and a pressure reducing valve communicating with the outlet nozzle, the pressure reducing valve including a gas inlet, a gas outlet, a valve seat, an actuation chamber, a pressure reducing valve member arranged to be in communication with the gas inlet so as to be urged away from the valve seat due to gas pressure in the gas inlet and urged towards the valve seat due to a predetermined gas pressure in the actuation chamber, and a communication passage extending through the pressure reducing valve and in communication with the actuation chamber and the gas outlet, the communication passage having a sealing surface defined at an end thereof facing the gas outlet;the gas charging device comprising: a charging nozzle configured and dimensioned to engage with the outlet nozzle, said charging nozzle having a leading end portion; a charging passage defined within the charging nozzle and arranged to communicate with the gas outlet when the charging nozzle is engaged with the outlet nozzle; a push member connected to the charging nozzle and having a projection extending outwardly from the charging nozzle; and a sealing means provided on the projection, said sealing means configured and dimensioned to sealingly engage with the sealing surface of the communication passage, thereby inhibiting gas flow through the communication passage and opening the pressure reducing valve to permit gas flow from the gas outlet through the gas inlet and into the gas cylinder.