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:
Jul. 16, 2013
Filed:
Oct. 05, 2012
Anurag H. K Sharma, Bangalore, IN;
Anurag H. K Sharma, Bangalore, IN;
Airbus Engineering Centre India, Bangalore, Karnataka, IN;
Abstract
A method of automatic delivery of appropriate flow rate of oxygen to a person flying in a pressurized aircraft cabin is disclosed. In one embodiment, a first aneroid valve that is responsive to differential gas pressure in a first altitude range is preset to close at a oxygen starting altitude point based on apriori lung capacity test. Further, flow of oxygen is initiated from an oxygen bottle using quarter turn switching regulator connected to the oxygen bottle via a minimum flow area of main valve to output a mixture of the flow of oxygen and aircraft cabin air into a mixing chamber. Furthermore, the first aneroid valve is gradually closed in response to increasing aircraft cabin pressure altitude to stop the pilot flow of oxygen during the first altitude range. Then, main valve is opened upon closing the first aneroid valve to flow pressurized oxygen into the mixing chamber.