Fire fighting foam injection system with auto-start feature
First Claim
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1. A system for injecting a liquid chemical foamant into a water stream, the system connected to a power source, the system comprising:
- a first pump that supplies the water stream;
a first tank that contains liquid chemical foamant;
a second pump that supplies liquid chemical foamant from the first tank;
an on/off switch; and
a controller connected to the on/off switch,the controller automatically initiating injection of liquid chemical foamant into the water stream upon activation of the power source when an auto start mode is programmed in the controller,the controller initiating injection of liquid chemical foamant into the water stream when the auto start mode is not programmed in the controller but the on/off switch is manually activated.
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Abstract
A fire fighting vehicle of the type having a system for introducing a liquid foam concentrate into a water delivery hose so that the percentage concentration of foamant in the mixture remains at a predetermined set value irrespective of variations in the water flow rate. The improvement provided involves the addition of an AutoStart feature whereby upon application of power to the foam control system, the system comes up in an on mode without the need for human intervention.
17 Citations
8 Claims
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1. A system for injecting a liquid chemical foamant into a water stream, the system connected to a power source, the system comprising:
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a first pump that supplies the water stream; a first tank that contains liquid chemical foamant; a second pump that supplies liquid chemical foamant from the first tank; an on/off switch; and a controller connected to the on/off switch, the controller automatically initiating injection of liquid chemical foamant into the water stream upon activation of the power source when an auto start mode is programmed in the controller, the controller initiating injection of liquid chemical foamant into the water stream when the auto start mode is not programmed in the controller but the on/off switch is manually activated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification