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:
Apr. 28, 1987
Filed:
Nov. 10, 1982
Humphrey A Hamlin, Montacute, GB;
Roger M Marsh, Sherborne, GB;
Normalair-Garrett (Holding) Limited, Yeovil, GB;
Abstract
A molecular sieve type gas separation system capable of delivering oxygen-enriched air by increasing the oxygen content of air fed to the system has control means including a valve arrangement associated with each sieve bed for cyclically subjecting each bed to a charge/adsorption on-stream phase followed by a purge/desorption regeneration phase. During the regeneration phase of each sieve bed the gas pressure in the bed at least substantially equals the ambient atmospheric pressure or a pressure related thereto such as the ambient pressure of an outlet to which the oxygen-enriched air is being delivered and, for a predetermined range of outlet ambient pressure, the overall cycle time and the relative durations of the phases are fixed at values such that the oxygen content of air delivered by the system remains within physiologically acceptable limits for breathing. In application of the system to an aircraft for supplying oxygen-enriched air to aircrew, the outlet will generally comprise one or more oral-nasal breathing masks and during the regeneration phase the beds are preferably opened to the ambient atmospheric pressure of the aircraft.