Patent ID: RE43398

Claim:
A home liquid oxygen ambulatory system for supplying a portable supply of oxygen, where a portion of the gaseous oxygen output obtained from an oxygen concentrator a pressure swing adsorption system is condensed into liquid oxygen, comprising: (a) an oxygen concentrator a pressure swing adsorption system comprising a molecular sieve bed which separates oxygen gas from receives the ambient air as an input and provides an output of oxygen-enriched gas ; (b) a condenser in communication with said oxygen concentrator pressure swing adsorption system for receiving and liquefying the oxygen gas flow the output from the pressure swing adsorption system ; (c) a cryocooler associated with said condenser; and (d) a first storage dewar in fluid communication with said condenser and adapted to store the oxygen liquefied by the condenser, the first storage dewar including means for transferring liquid oxygen from the first dewar to a second dewar for storing a quantity of oxygen suitable for moveable oxygen treatment, wherein said liquid oxygen transferring means is adapted to increase the pressure in said first dewar.