Patent ID: 7294170
Filing Date: 2007-11-13
Classification: A61M,A62B,B01D,F04B

Abstract:
1. Apparatus for producing, compressing and storing an oxygen enriched gas comprising: a first compressor; at least one sieve bed having an inlet in fluid communication with an outlet of the first compressor; a tank in fluid communication with an outlet of the at least one sieve bed that receives oxygen enriched gas produced by the sieve bed; wherein said oxygen enriched gas produced by the sieve bed contains at least 70% oxygen by volume; first and second flow lines in fluid communication with the tank that are arranged such that oxygen enriched gas from the tank is split between the first flow line and the second flow line; a portable oxygen cylinder configured to be removed from the apparatus; an electric motor; a second compressor driven by the electric motor, wherein the second compressor includes an inlet in fluid communication with the first flow line and an outlet in fluid communication with the portable oxygen cylinder, wherein operation of the compressor gradually builds up a pressure of oxygen enriched gas in the portable cylinder; wherein the second flow line is configured to direct oxygen enriched gas to a patient while the compressor builds up the pressure of the oxygen enriched gas in the portable cylinder; wherein the first flow line is configured to inhibit fluid flow of oxygen enriched gas from the tank to the compressor inlet when a pressure in the second flow line falls below a predetermined value.