Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Reexamination Certificate
2006-09-12
2006-09-12
Krishnamurthy, Ramesh (Department: 3753)
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
C137S486000, C251S007000, C251S048000, C251S337000
Reexamination Certificate
active
07104275
ABSTRACT:
A control valve includes an elastomeric flow tube, a plunger having first and second ends, and a pinch member connected to the first end of the plunger. The pinch member is situated adjacent the flow tube. A reference surface is positioned generally opposite the pinch member such that the elastomeric tube is squeezable between the pinch member and the reference surface to control fluid flow through the flow tube. A first guide spring is situated between the pinch member and the first end of the plunger, and a second guide spring is situated adjacent the second end of the plunger. A damper may be connected to the plunger. Further, a pressure containing member may situated about at least a portion of the flow tube.
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Emerson Electric Co.
Krishnamurthy Ramesh
Locke Liddell & Sapp LLP
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