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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11247014 B1

PDFFull Text
Date of Patent:
Feb. 15, 2022

Filed:

Feb. 22, 2017

Oxygen concentrator

Applicant:

Teijin Pharma Limited, Tokyo, JP;

Inventors:

Ryo Koizumi, Tokyo, JP;

Yuki Yamaura, Tokyo, JP;

Assignee:

Teijin Pharma Limited, Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Frank M Lawrence, Jr

Int. Cl.
CPC ...
B01D 53/047 (2006.01); A61M 16/00 (2006.01); C01B 13/02 (2006.01); A61M 16/10 (2006.01); B01D 53/04 (2006.01); B01D 53/26 (2006.01); B01D 53/30 (2006.01);
U.S. Cl.
CPC ...
A61M 16/101 (2014.02); A61M 16/0063 (2014.02); B01D 53/047 (2013.01); B01D 53/0415 (2013.01); B01D 53/0446 (2013.01); B01D 53/261 (2013.01); B01D 53/30 (2013.01); C01B 13/0259 (2013.01); A61M 2202/0266 (2013.01); A61M 2205/3368 (2013.01); B01D 2253/108 (2013.01); B01D 2256/12 (2013.01); B01D 2257/102 (2013.01); B01D 2257/80 (2013.01); B01D 2259/402 (2013.01); B01D 2259/40009 (2013.01); B01D 2259/40054 (2013.01); B01D 2259/4533 (2013.01); C01B 2210/0014 (2013.01); C01B 2210/0046 (2013.01);
Abstract

An oxygen concentrator is provided with a controller for recovering an oxygen concentration to a level suitable for treatment in a short period of time by selecting an optimum purge time corresponding to the deterioration state of an adsorbent. The judgment of moisture-absorption deterioration is performed when the detected value of the oxygen concentration sensor is equal to or less than a control value of the oxygen concentration in the oxygen-enriched gas and the detected value of the pressure sensor is equal to or more than an adsorption pressure at which the oxygen concentration increases significantly before and after the control to reduce the purge time, and control of reducing a time for the purge step shorter than a preset time is performed.

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