Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Reexamination Certificate
2011-06-28
2011-06-28
Fristoe, Jr., John K (Department: 3753)
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
C251S310000
Reexamination Certificate
active
07967023
ABSTRACT:
A control valve for use in a liquid-carrying system, such as a heating or cooling system, containing a differential pressure governor which keeps the differential pressure between the inlet and the outlet constant. The control valve also includes an arrangement for setting and adjusting the maximum flow of liquid through the valve. This arrangement comprises a flow valve having two cooperating valve members (4and6), which are arranged in the flow path and are constructed as two concentric rings, each of which has a recess extending about 180 degrees in the circumferential direction. The outer ring (4) is stationary relative to the valve housing, while the inner ring (6) may be displaced in the circumferential direction by means of a rotatable handle, whereby a greater or smaller overlap between the recesses may be provided. The maximum flow amount may hereby be set manually. The inner ring (6) may also be displaced in the axial direction, whereby a greater or smaller overlap between the recesses in the axial direction may be provided. The flow amount may hereby be adjusted within the limits of the presetting e.g. by means of an actuator. The flow may be blocked completely in an outer position.
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International Search Report.
Notice of Opposition to corresponding European Patent Application No. 1 896 755, dated Nov. 22, 2010.
Decision in Opposition to corresponding Danish Patent, patent upheld, dated Nov. 18, 2008.
Grounds for Opposition to the Danish Corresponding Patent, dated May 29, 2008.
Statement by Troels Pedersen, denoted as P5 in the Danish Opposition, submitted by opposer, dated Mar. 28, 2008, with English Translation.
Coleman Sudol Sapone P.C.
Frese A/S
Fristoe, Jr. John K
Sapone William J.
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