Nozzle check valve
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United States of America Patent
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May 21, 2013
Issued Date -
N/A
app pub date -
Mar 26, 2011
filing date -
Mar 26, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A protection system for protecting a fire hydrant is disclosed having an interior, the protection system including a nozzle having a first end to be secured to the hydrant and a second end configured to engage a fire hose coupling, the nozzle defining a bore that is in fluid communication with the interior of the fire hydrant, wherein the nozzle defines a seat disposed in the bore; and a disc disposed within the bore and configured to move axially and rotationally from a normally closed position to an open position in response to an increase in pressure within the interior of the fire hydrant.
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