FOAM CONCENTRATE PROPORTIONING SYSTEM AND METHODS FOR RESCUE AND FIRE FIGHTING VEHICLES
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United States of America Patent
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Feb 3, 2004
Grant Date -
Feb 5, 2004
app pub date -
Aug 2, 2002
filing date -
Aug 2, 2002
priority date (Note) -
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Abstract
A system and method of maintaining a desired additive to water ration in a fire-fighting system including a water flow sensor configured to measure the water flow rate, a water pump, a hydraulic pump, a linear hydraulic cylinder driven by the hydraulic pump, an additive pump mechanically coupled to the linear hydraulic cylinder; and a pump displacement sensor configured to sense the position of the additive pump, the pump displacement sensor being in communication with the water flow sensor to maintain a pre-determined ratio of additive to water.
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