Fire extinguishers – Fluid systems – Plural source – mixing in transit
Patent
1983-10-21
1985-07-02
Kashnikow, Andres
Fire extinguishers
Fluid systems
Plural source, mixing in transit
13710119, A62C 3500
Patent
active
045262349
ABSTRACT:
A wetting agent injection system is shown according to the preferred embodiment of the present invention utilized with firefighting apparatus having a positive pressure pump. The purpose of the system is to automatically inject a wetting agent into the pump during its normal firefighting operation. The system is controlled by flow switches located on one or more discharge lines of the pump, by a float switch in the wetting agent supply tank, and by regulated air pressure in the wetting agent supply tank. When the flow switches detect water flowing and when the float switch does not detect an empty supply tank, they activate relays within the control box of the system, which in turn activate electric solenoid valves permitting wetting agent to be injected into the suction side of the pump. Once in the pump, the wetting agent rapidly mixes with the water. The water treated with wetting agent penetrates better, reaching deeper into the material mass than untreated water can. Adjustable metering valves at the point of injection are further provided for allowing different flow settings and wetting agent viscosities.
REFERENCES:
patent: 2752934 (1956-07-01), Badberg
patent: 3647001 (1972-03-01), Livingston
patent: 3846515 (1974-11-01), Williamson
patent: 4037664 (1977-07-01), Gibson
patent: 4234044 (1980-11-01), Hollan et al.
patent: 4278132 (1981-07-01), Hostetter
Kashnikow Andres
Malpede Scott D.
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