Life support oxygen concentrator

Details Life support oxygen concentrator Life support oxygen concentrator

2007-07-31

2007-07-31

Lawrence, Frank M. (Department: 1724)

Gas separation: processes

Solid sorption

Including reduction of pressure

C095S102000, C095S113000

Reexamination Certificate

active

10884854

ABSTRACT:
Gas separation by pressure swing adsorption (PSA) and vacuum pressure swing adsorption (VPSA), to obtain a purified product gas of the less strongly adsorbed fraction of the feed gas mixture, is performed with an apparatus having a plurality of adsorbers. The adsorbers cooperate with first and second valves in a rotary PSA module, with the PSA cycle characterized by multiple intermediate pressure levels between the higher and lower pressures of the PSA cycle. Gas flows enter or exit the PSA module at the intermediate pressure levels as well as the higher and lower pressure levels, under substantially steady conditions of flow and pressure. The PSA module may comprise a rotor containing laminated sheet adsorbers and rotating within a stator, with ported valve faces between the rotor and stator to control the timing of the flows entering or exiting the adsorbers in the rotor.

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