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.:
Date of Patent:
Jan. 21, 2008
Filed:
Apr. 11, 2004
Applicants:
Bowie G. Keefer, Vancouver, CA;
David G. Doman, Surrey, CA;
Inventors:
Bowie G. Keefer, Vancouver, CA;
David G. Doman, Surrey, CA;
Assignee:
QuestAir Technologies Inc., Burnaby, British Columbia, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 53/047 (2005.12);
U.S. Cl.
CPC ...
Abstract
Pressure swing adsorption (PSA) separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds. The invention provides rotary multiport distributor valves to control the timing sequence of the PSA cycle steps between the beds, with flow controls cooperating with the rotary distributor valves to control the volume rates of gas flows to and from the adsorbent beds in blowdown, purge, equalization and repressurization steps.