公开(公告)号：US3672384A

公开(公告)日：1972-06-27

申请号：US3672384D

申请日：1970-09-15

Applicant: AGA AB

Inventor： HELLQUIST IVAN A

IPC: A62B9/02 ,  B64D10/00 ,  G05D16/00

CPC classification number: A62B9/022 ,  B64D10/00 ,  Y10T137/0777 ,  Y10T137/2012

Abstract: A breathing gas regulator for an aviator comprises an oxygen supply, a first pressure reducing valve, a second pressure reducing valve, and a branch line intermediate the two pressure reducing valves for conveying gas to pressurize the aviator suit in the event of cabin pressure failure. The second pressure reducing valve acts as a demand regulator supplying breathing gas at a normal breathing pressure of about 20 mm water column. The breathing gas outlet includes an air injector open to the cabin at cabin altitudes of up to 6 km for mixing air with the oxygen. The branch line includes a pressure responsive valve which shuts off the air supply at a cabin altitude of 6 km. Thus, the regulator supplies 100 percent oxygen at higher cabin altitudes. The branch line also includes a pressure-responsive control for increasing the breathing gas pressure in the event of a loss of cabin pressure. In that event, the control unit increases the gas pressure supplied by the demand regulator an amount necessitated by the altitude. The branch line supplies gas to pressurize the suit and the amount of this pressure is conveniently set by controls as a function of breathing gas pressure. For example, suit pressure may be approximately 3.5 times breathing gas pressure. The device preferably includes a g-susceptible valve for pressurizing the suit to counter the effect of g-forces to which the aviator is subjected. In this event, suit pressure is controlled by suitable means, such as a shuttle valve, such that it will be a function of breathing gas pressure or the magnitude of a gas signal produced by the g-forces, whichever is greater.