Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Reexamination Certificate
2005-07-26
2005-07-26
Hepperle, Stephen M. (Department: 3753)
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
C137S517000
Reexamination Certificate
active
06920895
ABSTRACT:
A surge suppressor and safety shut-off valve is described which automatically shuts off fluid flow in response to a sufficient pressure differential across the valve. The shut-off valve comprises a valve body adapted for use within a fluid distribution system through which a predetermined flow of a fluid is nominally allowed to pass. A flow restricting means is disposed therein that reduces the maximum flow when triggered by a sufficient pressure differential between inlet and outlet. By way of example, the flow restricting means is preferably provided by a poppet which is slidably engaged within the valve chamber to restrict fluid flow therethrough. The poppet is preferably adapted with a very low volume bypass port through which opposing pressures at valve inlet and outlet may be equalized for automatically resetting of the valve after the surge has passed, or a rupture has been repaired.
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Avis Alan
Rodman Brian
Hepperle Stephen M.
O'Banion John P.
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