Atmospheric compensating automatic air release valve
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United States of America Patent
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-
Feb 25, 1992
Grant Date -
N/A
app pub date -
Jul 24, 1989
filing date -
Jul 24, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic air release valve which is viable to operate at any pressure. The air release valve includes a first orifice for exhausting air and a second orifice which is exposed to atmosphere but is always sealed. The second orifice exposes a vertically movable stem within the valve to forces which are equal and opposite to a suction force which tends to hold the valve stem in sealing relation to the first, air exhaust orifice. Because of the equalization of pressures made possible by the provision of first and second orifices, movement of the valving mechanism within the valve housing downwardly as the liquid level goes down causes the air vent orifice to open irrespective of the pressure within the valve.
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