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Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage

  • US 6,805,122 B2
  • Filed: 09/14/2001
  • Issued: 10/19/2004
  • Est. Priority Date: 10/01/1997
  • Status: Expired due to Term
First Claim
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1. An apparatus for supplying oxygen-enriched gas to a patient and to a high pressure storage tank, comprising;

  • a first compressor which receives ambient air;

    an oxygen concentrator which produces oxygen enriched gas, said oxygen concentrator having an inlet which receives air from said first compressor and an outlet which provides oxygen enriched gas to a product storage tank;

    a first outlet flow line which operatively delivers said oxygen enriched gas from said product tank to a patient, said flow line having a pressure from about 3 to about 10 psi;

    a second outlet flow line which operatively delivers said oxygen enriched gas from said product tank to a buffer tank at a pressure from about 12 to about 22 psi, said buffer tank operatively connected by a flow line to a radial compressor, said radial compressor being capable of compressing said oxygen enriched gas and transferring the oxygen enriched gas to a high pressure storage tank, and a prioritizing apparatus which terminates the operation of said radial compressor when the oxygen concentration of said oxygen enriched gas operatively delivered to said radial compressor falls below a predetermined value so that said oxygen enriched gas is continuously supplied to the patient;

    wherein said high pressure storage tank is capable of storing compressed gas at a pressure between about 21 psi and about 4000 psi.

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