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:
Mar. 09, 2004
Filed:
May. 17, 2002
Applicant:
Inventors:
Keith Roberts, Stillwater, MN (US);
Chaouki Khamis, New Brighton, MN (US);
Assignee:
Porous Media Corporation, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/514 ;
U.S. Cl.
CPC ...
B01D 3/514 ;
Abstract
An improved inlet silencer/filter for an oxygen concentrator includes a HEPA filter and an adjoining chamber for receiving air flow from the HEPA filter. The chamber is surrounded on one face by the HEPA filter, and by sound absorbing padding on at least 4 other faces. Air is forced from the HEPA filter, through the open chamber and then through the sound absorbing padding by a flow restrictor plate. Air flows from here through air channels and into an open chamber leading to an outlet from the air silencer/filter.