Fire extinguishers – Processes – Of extinguishing fire
Patent
1993-04-13
1995-01-31
Mitchell, David M.
Fire extinguishers
Processes
Of extinguishing fire
169 9, 169 53, A62C 3100
Patent
active
053852087
ABSTRACT:
An airborne foam delivery apparatus is adapted to be carried as a slung bucket beneath a helicopter to deliver a high volume of fire suppressant foam for wildland firefighting. The delivery apparatus comprises a liquid tank for holding a foamable liquid. A support frame extends downward from the liquid tank to support the liquid tank above the ground during ground operations. Three nozzles are directed generally downwardly from beneath the liquid tank within a protective apron. A liquid valve is positioned between the liquid tank and the each nozzle. Each liquid valve is remotely operable to allow passage of the foamable liquid through the corresponding nozzle. A pressure regulator is connected to receive compressed air from gas containers mounted within the liquid tank, and to controllably discharge the compressed air into the liquid tank to maintain a positive regulated pressure within the liquid tank. The positive pressure expels the foamable liquid through tile nozzles when tile liquid valves are operated. An aerating screen is positioned beneath each nozzle to aerate and foam the foamable liquid as it emerges from the nozzle.
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Vandersall, H. L., "The Use of Foam in Wildland Fire Fighting: Some of the What, etc.", Apr. 4, 1990.
"Foam: Making Water a Better Firefighter", PHOS-CHEK Monsanto Product Brochure, Pub. No. 9164.
Baker John L.
Baker R. Arnold
Mitchell David M.
Pike Andrew C.
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