Patent ID: 8894751

Claim:
A removable module for a portable oxygen concentrator, comprising: at least one cartridge, comprising: a housing having a feed end and a product end; at least one input port for incoming air flow in said feed end; a feed end plug; a diffusion channel in said feed end; an optional rupture plate for said input port; at least one adsorbent bed contained in said housing, wherein said adsorbent bed comprises at least one molecular sieve material having an average particle size of about 60 μm to 180 μm and having a substantially spherical shape; wherein said adsorbent bed has an aspect ratio of length to diameter of less than about 6; an optional fibrous pad positioned at either end or both ends of said adsorbent bed; at least one output port for an oxygen-enriched product flow in said product end; and a product end plug comprising a gas flow controls and at least one collection channel; at least one enriched-oxygen product tube, comprising: an input end plug; an oxygen input port in said input end plug; an output end plug; an oxygen output port in said output end plug; and an optional rupture plate for said oxygen output port; and a product end block comprising at least one passageway for transport of said oxygen-enriched product; wherein said at least one cartridge and said at least enriched-oxygen product tube are connected to said product end block.