Compositions – Preservative agents – Anti-corrosion
Patent
1976-04-01
1978-01-24
Bernstein, Hiram H.
Compositions
Preservative agents
Anti-corrosion
169 15, 239343, 261DIG26, 222195, B01J 1300
Patent
active
040703029
ABSTRACT:
Foam producing equipment in which a container interior is sub-divided by a concentric array of cylindrical shells into radially spaced concentric chambers. A relatively small amount of a foamable liquid solution is held in the lower part of the container, and, above the liquid level, the shells are selectively perforated. A compressed gas is admitted to an outermost concentric chamber and agitates the liquid solution therein to form a foam which rises and then in a generally radial motion moves progressively through the perforate wall portions of the concentric shells to a foam outlet associated with a central, innermost concentric chamber. A staged extraction of liquid, with foam compaction, occurs as the foam is forced through successive perforate shell portions, with separated liquid utilizing imperforate wall portions of the shells to drain back into the supply of the liquid solution. A highly efficient use of liquid solution and gas produces large quantities of a dense, low moisture foam variously useful in fire fighting, cleaning, and in the application of agriculture herbicides, insecticides, fertilizers and the like.
REFERENCES:
patent: 1995215 (1935-03-01), Mehlsen
patent: 2577025 (1951-12-01), Lundberg
patent: 3388868 (1968-06-01), Watson
patent: 3595298 (1971-07-01), Enders
patent: 3964146 (1976-06-01), Vestre
patent: 3979326 (1976-09-01), Chatterton
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