Fire extinguishers – Processes – With mixing of extinguishing compounds
Patent
1994-02-22
1995-11-07
Mitchell, David M.
Fire extinguishers
Processes
With mixing of extinguishing compounds
169 66, 169 68, 169 46, 169 15, A62C 306
Patent
active
054640652
ABSTRACT:
Fires in tanks storing combustible liquids are extinguished using water from a settled layer at the tank bottom to form a foam that is transported to the top of the combustible liquid by the lifting action of an inert gas stream introduced into the tank at a location below the liquid surface. A stream of water is removed from the tank, mixed with a foam-forming concentrate, merged with a flowing stream of inert gas, and circulated back to the tank at a point below the surface of the stored liquid to form an upwelling foam column which explodes upon the liquid surface and spreads across that surface to extinguish the fire and prevent its reignition.
REFERENCES:
patent: 307689 (1884-11-01), Thayer
patent: 1115887 (1914-11-01), Bartels
patent: 1164234 (1915-12-01), Steiner et al.
patent: 2718927 (1955-09-01), Dill et al.
patent: 2730178 (1956-01-01), Risinger
patent: 3475333 (1969-10-01), Meldrum et al.
patent: 4664199 (1987-05-01), Grant et al.
patent: 5113945 (1992-05-01), Cable
Hoge Gary C.
Mitchell David M.
Shubert Roland H.
Valkyrie Scientific Proprietary, L.C.
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