0423496-A2 is referenced by 8 patents and cites 6 patents.

In an oxygen concentrator which is intended for aircraft use, a booster compressor (16) is used to increase the pressure of the product gas from the concentrator (15) in order to increase the amount of the gas which can be stored in a plenum (17). The booster includes two moving pistons (47,49) which are rigidly linked together and a series of check valves (44,54,57,59) which control the flow of gases through the compressor (16). One of the pistons (49) is driven by air from the rotary valve (31) in the concentrator (15), and the other piston (47) compresses the product gas for delivery to the plenum (17). A small sample of concentrator product gas is monitored by an oxygen sensor (66) for oxygen concentration. Once the oxygen concentration has reached an acceptable level the booster compressor (16) fills the plenum (17) with product gas.; Thereafter, if oxygen concentration of product gas delivered to the crew from the concentrator (15) falls below the concentration which is required at a particular altitude, the product gas stored in the plenum (17) is delivered to the crew. The oxygen sensor monitors the concentrator output product gas to the breathing regulator when the stored plenum gas is not being used.

Title
Oxygen concentrator with pressure booster and oxygen concentration monitoring.
Application Number
EP19900117864 19900917
Publication Number
0423496 (A2)
Application Date
September 17, 1990
Publication Date
April 24, 1991
Inventor
Cao Tuan
US
Alftine David N
US
Myers William P
US
Hradek Richard W
US
Assignee
Litton Systems
US
IPC
B64D 13/00
A62B 07/14
B64D 13/00
A62B 07/00
A61M 16/10
A61M 16/00
B64D 13/00
A62B 07/14
A61M 16/10
A61M 16/00
View Original Source Download PDF