NEGATIVE PRESSURE ACTUATOR
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United States of America Patent
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N/A
Issued Date -
Sep 24, 2009
app pub date -
Mar 18, 2008
filing date -
Mar 18, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An actuator for use with a negative pressure fire suppression sprinkler system is disclosed. The actuator has three chambers, each chamber having a flexible diaphragm. One chamber is connected to the sprinkler system piping network. Its diaphragm moves in response to an increase in pressure in the piping network signaling a fire. The diaphragm in the second chamber opens an orifice in response to the motion of the first diaphragm. The open orifice allows water to flow from the third chamber to the ambient. The diaphragm in the third chamber moves in response to the water flow from the third chamber. The third chamber is connected to a valve controlling water flow to the piping network. Motion of the diaphragm in the third chamber actuates the valve, releasing water to the system.
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