CHEMICALLY FIXED OXYGEN BREATHING APPARATUS Russian patent published in 1995 - IPC

FIELD: means for protection of respiratory organs. SUBSTANCE: apparatus has facepiece 1, carbon dioxide absorber 2, oxygen generator 3, breathing bag 4, surge tank 5 and oxygen absorber 33. Breathing bag is divided into main part 10 and reserve part 11 by flexible partition 8 fitted with bypass valve 9. Arranged in the surge tank is regulating device. Arranged in main part of breathing bad is tensioner 23 engageable with tension valve 30 which is linked with generator 3 and oxygen absorber 33. Carbon dioxide absorber is connected with main part of breathing bag and oxygen absorber is connected with its reserve part. Apparatus operates by the pendulum type breathing system. Supply of oxygen from generator to breathing system is set by means of regulating device in accordance with amount of oxygen required for breathing. In case of unbalance in supply and consumption of oxygen, excess of oxygen is reserved in oxygen absorber 33. After supply of oxygen to breathing system of apparatus by oxygen generator is discontinued, reserved oxygen from oxygen absorber is supplied. Carbon dioxide exhaled by user is chemically fixed by carbon dioxide absorber 2. EFFECT: increased time of protective action of apparatus in case of operation under conditions of unbalance of oxygen supply from oxygen generator and its consumption required for breathing. 1 dwg