Fire fighting method and apparatus

Details Fire fighting method and apparatus Fire fighting method and apparatus

A - Human Necessities

62

C

A62C 31/02 (2006.01) A62C 99/00 (2010.01) B05B 7/14 (2006.01)

Patent

CA 2144642

An apparatus for delivering compressed particulate solid fire fighting agent includes a pneumatic system for entraining particulate fire fighting agent in a high pressure gas stream, compressing the agent into quasi-discrete quasi-solid slugs, and delivering the compressed slugs in a constant stream at a high rate of speed to the center of the fire being fought from a safe distance. The system includes a high pressure gas supply (12, 14), a pressure regulator (26), a pressure compensator (36), a pressure sink (44), an agent storage vessel (50), and a multi-stage delivery nozzle (74) including a pressure imbalance mechanism (125). Particulate agent is sequentially compressed in the multiple nozzle stages (105, 109, 112) by virtue of a pulsating gas supply effect, and ejected in a constant stream of solid slugs at speeds near or above Mach 1.

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