Firefighting polymer gel preparation onboard aircraft
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United States of America Patent
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-
Mar 9, 2021
Grant Date -
Jun 6, 2019
app pub date -
Feb 5, 2019
filing date -
Aug 1, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A tank on a firefighting aircraft initially is loaded with water. A polymer gel emulsion vessel is provided on the aircraft, but is not activated and mixed with tank water until such polymer gel preparation is initiated by an operator. When initiated, a pump pulls water from the tank and doses it with gel emulsion. Double elbows and/or the pump impeller fully activates the polymer gel. The activated polymer gel is mixed within the tank by one of a variety of systems including mixing paddles or sparging with gas. In one embodiment, a hollow tower of telescoping form has a float to keep an upper end near a surface in the tank and a sparging gas entry is a controlled distance below the surface, such that gas of limited pressure, such as from a ram air inlet can sparge and mix the water and activated polymer gel emulsion effectively.
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