Fire extinguishing system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 25, 2000
Grant Date -
N/A
app pub date -
Jul 17, 1998
filing date -
Jul 17, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for extinguishing fires in aircraft cargo spaces includes two pressure chambers separated by an annular boss which houses a restricting orifice and a check valve assembly. A lower chamber acts as a high rate discharge fire extinguisher and the upper chamber acts as a metering fire extinguisher. Upon receipt of an activation command from the cockpit, all the agent contained in the high rate discharge chamber is emptied within seconds. At the same time, the pressurized agent contained in the upper chamber pushes the check valve to a closed position and allows the agent in the metering chamber to flow through the orifice of the restrictor at a predetermined rate. With the properly sized orifice, the agent in the upper chamber will be emptied at a rate that lasts for the needed duration of the aircraft fire protection system.
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