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:
Aug. 12, 2003
Filed:
Jan. 18, 2002
Robert Michael Fielding, Northumberland, GB;
Domnick Hunter Limited, Birtley, GB;
Abstract
A system for treating air for supply to an enclosed space in which the air is to be breathed, includes an inlet through which air can enter the system from atmosphere for supply to the enclosed space, and a regenerative adsorption assembly having at least two chambers which contain an adsorbent material, arranged so that air flowing in the inlet for supply to the enclosed space can pass through one of the chambers for adsorption of contaminants before supply to the enclosed space while adsorbent material in another of the chambers is purged of adsorbed contaminants. A recirculation path is provided for supplying air from the enclosed space to the inlet to be mixed with air from atmosphere before it is supplied to the enclosed space. The system includes structure for adjusting the resistance to flow of air through the recirculation path.