Universal transportable compressed air foam fire fighting system
First Claim
1. A compressed air foam fire fighting system comprising:
- a primary fluid delivery conduit;
a source of fluid;
a pump connected to said source and to said conduit to deliver said fluid through said conduit;
a first engine operatively connected to drive said pump;
a foaming agent reservoir and means for conducting foaming agent from said reservoir to said conduit;
a differential pressure valve in said conduit connected to said foaming agent reservoir;
a metering valve connected to said reservoir for varying the proportion of said foaming agent to said fluid; and
conduit means for connecting said metering valve to said foaming agent reservoir and to said differential pressure valve;
an air compressor connected to said conduit;
a second engine driving said air compressor; and
an air metering valve selectively varying the amount of air supplied to said conduit.
2 Assignments
0 Petitions
Accused Products
Abstract
A compressed air/foam fire fighting system which is sufficiently compact to be carried on the bed of a pick-up truck includes a water tank, a pump for providing water at substantial pressure to a water conduit, an engine for driving the pump, a foam reservoir including a bladder tank connected to the pump, an air compressor, an engine for driving the air compressor, a differential pressure valve connected in the water conduit, a metering valve adjustable to supply a desired proportion of foam concentrate to water connected across the differential pressure valve, an air valve for controlling the amount of air from said compressor, and an air injection venturi for mixing air into a water/foam concentrate. A two-way valve connected between the tank and the pump is movable between a first position where water is pumped from the water tank and a second or suction position where water is drawn from an outside tank or other source. The system can supply plain water, a water/foam mixture, a mixture of compressed air, water, and foam, or compressed air only.
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Citations
27 Claims
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1. A compressed air foam fire fighting system comprising:
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a primary fluid delivery conduit; a source of fluid; a pump connected to said source and to said conduit to deliver said fluid through said conduit; a first engine operatively connected to drive said pump; a foaming agent reservoir and means for conducting foaming agent from said reservoir to said conduit; a differential pressure valve in said conduit connected to said foaming agent reservoir; a metering valve connected to said reservoir for varying the proportion of said foaming agent to said fluid; and conduit means for connecting said metering valve to said foaming agent reservoir and to said differential pressure valve; an air compressor connected to said conduit; a second engine driving said air compressor; and an air metering valve selectively varying the amount of air supplied to said conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24, 26)
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12. A compressed air fire fighting system comprising:
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a water pump connected to a source of water; an engine for driving said water pump; a water delivery conduit having an inlet connected to said pump and an outlet; a differential pressure valve connected between said inlet and said outlet; a foaming agent reservoir; means responsive to water pressure at said inlet for conducting foam agent from said reservoir to said water delivery conduit to provide a mixture of foam agent and water; an air compressor and a second engine driving said air compressor; an air conduit connected to said air compressor; an air metering valve for varying flow through said air conduit; an outlet conduit including mixing means connected to said water delivery conduit downstream of said differential pressure valve and connected to said air conduit for providing a mixture of compressed air, foam and water for fighting fires. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A compressed air fire fighting system comprising:
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a source of water under pressure; a water delivery conduit having an inlet connected to said source and an outlet; a differential pressure valve connected between said inlet and said outlet; a foaming agent reservoir and means responsive to water pressure from said source for conducting foam agent to said differential pressure valve to provide a water/foam solution; a foam selector metering valve connected to said outlet for varying the proportion of foam agent to water; a source of compressed air and an air conduit carrying said compressed air; an air metering valve in said air conduit; mixing means connected to said foam selector metering valve and to said air metering valve for mixing compressed air with said water/foam solution. - View Dependent Claims (19)
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20. A compressed air fire fighting system comprising:
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a water pump connected to a source of water; an engine for driving said water pump; a water delivery conduit having an inlet connected to said pump and an outlet; a foaming agent reservoir; a differential pressure valve connected between said inlet and said outlet including means responsive to water pressure at said inlet for conducting foam agent from said reservoir to said water delivery conduit to provide a mixture of foam agent and water; and a control panel including a foam selector valve for varying the proportion of foaming agent and water connected to said conduit and a valve controlling the delivery of water or water/foam mixture from said conduit. - View Dependent Claims (21, 22, 23)
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25. A transportable universal fire fighting system including:
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a frame suitable for carrying said system on the bed of a truck, said system comprising; a tank for transporting water; a pump for pumping water from said tank and a water conduit; a reel in hose for dispensing fire fighting liquid from said system; a container for carrying foam concentrate; an air compressor; means for connecting said system to alternate sources of water as a fire fighting fluid; selector valve means connected to the source of foam concentrate and to said water conduit to select desired proportions of foam to water to provide a water/foam mixture; an air injection valve, including a venturi, for introducing compressed air into said water/foam mixture; means for powering said pump and compressor whereby said system is capable of applying any one of the following as a fire fighting fluid; a) water; b) water/foam combination; c) aspirated water/foam combination;
while being supplied with water selectively from said tank or from an external source. - View Dependent Claims (27)
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Specification