Fire extinguishers – Apparatus which isolates flames from non-burning area – With means to isolate fire from atmosphere and extinguish
Patent
1976-06-22
1977-07-26
Blunk, Evon C.
Fire extinguishers
Apparatus which isolates flames from non-burning area
With means to isolate fire from atmosphere and extinguish
169 30, 252 805, A62D 100
Patent
active
040376656
ABSTRACT:
A thixotropic high internal phase ratio emulsion which is essentially nonflammable is employed as a fire extinguishing agent. In the preferred embodiment the emulsion contains an aqueous internal phase which makes up the major part of the emulsion, usually in excess of 90%, but preferably in excess of 95%, and a minor amount of an external phase which is of low volatility and/or flammability such as a heavy oil and an emulsifying material. Because it is thixotropic and cohesive, it forms a blanket over a fire, and coats adjacent surfaces, preventing the spread of the fire. This composition is particularly useful in fighting forest fires where the emulsion can be dropped or sprayed from aircraft with a minimum loss due to dispersion in air currents.
The invention also comprises a fire extinguisher comprising a container containing a high internal phase ratio emulsion and means for expelling said emulsion onto or in the path of a fire.
REFERENCES:
patent: 3856088 (1974-12-01), Frisque
patent: 3912647 (1975-10-01), Adell
patent: 3976580 (1976-08-01), Kaminstein
Blunk Evon C.
Glass Hyman F.
Mar Michael
Petrolite Corporation
Ring Sidney B.
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