Patent ID: 7582138

Claim:
A method which may be used for supplying an oxygen enriched gas stream on an aircraft, said method comprising: a) generating a highly enriched oxygen gas stream from atmospheric air with an oxygen concentrator consisting essentially of at least one pair of adsorbers, wherein: 1) each of said adsorbers consists of a faujasite zeolite with a Si/Al ratio between about 1 and about 1.5; 2) said faujasite zeolite is exchanged with silver to a degree between about 20% and 30%; 3) said gas stream is generated by pressure swing adsorption; 4) the desorption pressure is greater than about 0.100 bar relative; 5) the cycle time is less than about 10 seconds; 6) the oxygen content of said stream is greater than about 98%; and b) supplying said oxygen gas stream to the airways of at least one person on an aircraft.