CHEMICAL AIR-FOAM FIRE EXTINGUISHER Russian patent published in 2011 - IPC A62C13/04 

FIELD: fire-fighting means.

SUBSTANCE: chemical air-foam fire extinguisher contains a steel case filled with 9 l of an aqueous-alkaline solution in the form of mixed sodium bicarbonate NaHCO₃ and licorice extract, and a polyethylene container filled with acid mixture in the form of sulphuric acid H₂SO₄ and ferric sulphide FeSO₄, and increasing volume and durability of generated foam; the polyethylene container is rigidly connected to a valve seat fixed at the bottom of a cup rigidly connected to a cover of the steel case to the bottom of which there is a handle for operating mode of the fire extinguisher, and at the top of the case, an outlet branch with a foam generator is placed. The cup is mounted in the case and is axial-symmetrical to the case and the polyethylene container, and the valve is connected to a rod axial-symmetrical in the cup and a spring-assisted spring. At the bottom of the cup, over the valve, there are at least three apertures providing connection of alkaline and acid portions of the fire extinguisher, and the cover of the case of the fire extinguisher comprises a lock-start gear.

EFFECT: more efficient fire protection by increasing operation speed and reliability.

3 cl, 5 dwg