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:
Jun. 25, 1996
Filed:
Jun. 15, 1994
Applicant:
Inventors:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
96130 ; 96133 ; 96144 ;
Abstract
A pressure swing adsorption unit comprises at least two absorbers, each absorber having at least a port connectable to at least one pumping unit. The pumping unit includes a first pumping stage and a second pumping stage. Each of the pumping stages are capable of discharging into an outlet conduit. A circuit is provided for selectively and alternately connecting a port to a source of feed gas and to the pumping unit such that the first and second pumping stages are sequentially fluidly connected in parallel, and then in series to reduce the pressure at the port to an intermediate vacuum level, and then to a low vacuum level.