Pressurized gas containers 36 are refilled from a source of high pressure gas using a valve assembly 1,3 that comprise a first 1 and second 3 gas flow control unit, the control units having a first valve 6 and a second valve 42 respectively, in which assembly further comprises actuators 22, 56 for cooperatively...http://www.google.es/patents/US6571835?utm_source=gb-gplus-sharePatente US6571835 - Valve assembly, apparatus and method of filing a pressurized gas container
Valve assembly, apparatus and method of filing a pressurized gas container
