Foam fire fighting apparatus

Details Foam fire fighting apparatus Foam fire fighting apparatus

1987-10-09

1989-05-09

Basinger, Sherman D.

Fire extinguishers

Fluid systems

Plural source, mixing in transit

169 14, A62C 3546

Patent

active

048280380

ABSTRACT:
An apparatus for making foam using a foam concentrate, a liquid and a vapor comprises a primary cylinder defining a mixing chamber therein. An eductor is disposed substantially within the mixing chamber for drawing in foam concentrate while mixing the foam concentrate with a portion of the liquid entering the apparatus. A secondary cylinder defining a foam chamber therein is in flow communication with the primary cylinder at one end via a flow passage therebetween. The eductor extends through the flow passage and into the secondary cylinder thereby defining an annulus in the flow passage to allow a portion of the liquid in the primary cylinder to by-pass the eductor and enter the secondary cylinder. Vapor is drawn into the secondary cylinder to mix with the combined liquid stream from the annulus and the stream from the eductor to create foam in the secondary cylinder. The foam may be directed to a storage tank for fire-fighting.

REFERENCES:
patent: 1734164 (1929-11-01), Faber
patent: 2089646 (1937-08-01), Friedrich
patent: 2388508 (1945-11-01), Timpson
patent: 2556239 (1951-06-01), Tuve et al.
patent: 2577451 (1951-12-01), Clemens et al.
patent: 2761516 (1956-09-01), Vassilkovsky

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