On/off sprinkler head with temperature responsive exhaust port valve
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United States of America Patent
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-
Jan 18, 1983
Grant Date -
N/A
app pub date -
Feb 26, 1980
filing date -
Feb 28, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An on/off sprinkler has a body defining an extinguishant inlet and outlet and is divided internally by a diaphragm defining with the body an intermediate chamber and normally isolating the inlet from the outlet. The diaphragm has a drain orifice allowing an extinguishant pressure balance on both sides of the diaphragm. There is an exhaust port from the intermediate chamber which is normally closed by a valve controlled by a heat sensitive device serving upon attainment of a predetermined temperature value to open the valve thus causing extinguishant exhaustion from the intermediate chamber which results in diaphragm movement to place the inlet in communication with the outlet and sprinkler operation.
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