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US 2009/0288845 A1Published application
Fire extinguishing apparatus
OwnerJames R. Belford, J. Paul Kingstoninventors
Life of this patent
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Abstract
A foam type fire extinguishing apparatus includes a selector which is operable to produce selected constant air flows for mixing with foam to provide variations in foam consistency and strength in accordance with the type of foam agent being used and the type of fire to be extinguished. The selector has a plurality of outputs with tunable valves connected with each output except for a first output. Each valve is adjusted to provide a different flow rate. By operating the selector to choose the appropriate output, different air flows are provided for mixture with the foam.
Claims8
A fire extinguishing apparatus, comprising
- (a) a foam supply;
- (b) an air supply;
- and
- (c) a mixing device connected with said foam and air supplies for mixing air and foam to form a primary air and foam mixture in accordance with the type of fire to be extinguished, said mixing device including an air flow regulator connected with the air supply for controlling the flow of air, said flow regulator including
- (i) a selector having a plurality of outputs of constant air flow;
- and
- (ii) at least one adjustable valve connected with one of said selector outputs to adjust the flow from the selector output, whereby the selector may be operated to provide different constant air flows to the mixing device to maximize the efficiency of the primary air and foam mixture in accordance with the type of foam from the foam supply.
4 more elements
Dependencies are inferred from the claim text.