Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Reexamination Certificate
2011-03-29
2011-03-29
Hepperle, Stephen M (Department: 3753)
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
C137S212000, C137S467500, C137S523000, C222S400700, C222S400800, C222S401000, C251S089000, C251S101000
Reexamination Certificate
active
07913714
ABSTRACT:
A check valve assembly which in an open position allows liquid to flow in one direction through the assembly including a moving sealing member which engages a seal to prevent liquid flow in a second opposite direction. The sealing member may be moved into engagement with the seal by rotation of a stem with an eccentric to block flow in both directions. A check valve and shut-off device assembly which in an open position allows liquid to flow in one direction through the assembly until gas or foam is mixed with the liquid. The shut-off device includes a sealing member which engages a seal to block flow through the assembly when foam or gas is present in the liquid. The check valve includes a sealing member which can reset the shut-off device. The check valve sealing member also engages the same sealing member to prevent any flow through the assembly in a closed position. In an open position, the check valve sealing member may engage the seal to prevent reverse flow of liquid through the assembly.
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Arov Gennady
Molinari Larry M.
Godfrey & Kahn S.C.
Hepperle Stephen M
Kees Nicholas A.
McCalister William
Perlick Corporation
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