Patent ID: 6314957
Filing Date: 2001-11-13
Classification: B01D,C01B,Y02C

Abstract:
Portable medical apparatus for delivering an oxygen-rich gas to a user, comprising:gas compression means for delivering air at a pressure of greater than 10.sup.5 Pa to gas concentrator means;electric-current supply means for supplying electric current to at least said gas compression means;gas concentrator means allowing an oxygen-rich gas containing from 50 vol % to 99 vol % of oxygen to be produced from air compressed by said gas compression means;gas liquefaction means allowing at least some of the oxygen contained in said oxygen-rich gas produced by said gas concentrator means to be liquefied;gas accumulation means allowing at least some of the oxygen liquefied by said gas liquefaction means to be collected and stored, at least temporarily;liquefied-gas warming and vaporizing means allowing at least some of the liquefied oxygen coming from said gas accumulation means to be warmed and vaporized; andgas transport means allowing at least some of the oxygen from at least one of said gas concentrator means and said warming and vaporizing means to be transported to at least one gas delivery interface capable of being connected to the upper airways of a user.