Chilled powder fire extinguisher
OwnerGeoffrey Paul Sandfordinventor
Life of this patent
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Abstract
A fire extinguisher comprises a conduit having an air inlet and outlet. A blower unit is used for delivering a stream of air from said inlet to said outlet for extinguishing a fire. The extinguisher includes a cooling device using water to cool the stream of air entering said inlet prior to it being delivered to said fire via said outlet, and a powder delivery system for injecting and mixing a powder into said cooled stream of air prior to it leaving said outlet. The cooling device utilising a tiny fraction of water to cool air as it passes there through.
Claims19
A fire extinguisher comprising a conduit having an air inlet and an air outlet, a blower unit for delivering a stream of air from said inlet to said outlet for extinguishing a fire, a cooling device using water to cool the stream of air entering said inlet prior to it being delivered to said fire via said outlet, and a powder delivery system for injecting and mixing a powder into said cooled stream of air prior to it leaving said outlet, wherein said stream of air is cooled by at least 20° C. by a relatively tiny fraction of water.
A portable hand-carried fire extinguisher comprising:
- a conduit having an air inlet and an air outlet, a blower unit for delivering a stream of air from said inlet to said outlet for extinguishing a fire, a cooling device using a tiny fraction of water relative to the air to cool the stream of air entering said inlet prior to it being delivered to said fire via said outlet, said cooling device comprising a drip feed assembly arranged to drip feed water from a first reservoir onto a water absorbent medium disposed at or near said air inlet, and a mist evaporator assembly disposed downstream of said inlet, and a powder delivery system for injecting and mixing a powder into said cooled stream of air prior to it leaving said outlet, said powder delivery includes a venturi nozzle through which said powder is injected into the cooled stream of air prior to exiting said outlet and an auger assembly for delivering powder stored in a second reservoir to said venturi nozzle.
Dependencies are inferred from the claim text.