Foam/water/air injector mixer
AssigneeElkhart Brass Mfg. Co., Inc.
InventorBrian Cable
Life of this patent
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Abstract
Firefighting apparatus specially adapted to deliver pressurized foam to a target surface. The apparatus includes a unique air injection mixer in which the air discharge nozzles are oriented at oblique angles to the stream flow. The aspirated air causes the foam to expand in the mixer without loss of force through generated turbulence to increase the pumping efficiency of the apparatus.
Claims12
Firefighting apparatus comprising a conduit, pump means connected to said conduit for delivering a supply of pressurized fluid through said conduit to a discharge nozzle, said pressurized fluid containing a predetermined quantity of a foaming agent, an eductor tube positioned along and in flow communication with said conduit, said eductor tube including an air inlet port in flow communication with a stream of pressurized air, and an air outlet nozzle positioned in the eductor tube in flow communication between said inlet portion and a through passageway of said eductor tube through which said pressurized fluid flows, said air outlet nozzle oriented at an oblique angle relative to a flow path of said fluid through said passageway, and means for introducing air into said flow path through said air outlet nozzle wherein said foaming agent expands into said pressurized fluid prior to discharge through said discharge nozzle.
Dependencies are inferred from the claim text.