Valves and valve actuation – Electrically actuated valve – Balanced valve
Reexamination Certificate
2006-02-28
2006-02-28
Bastianelli, John (Department: 3751)
Valves and valve actuation
Electrically actuated valve
Balanced valve
C251S065000, C251S129200, C251S298000
Reexamination Certificate
active
07004449
ABSTRACT:
A fuel metering valve for a gas turbine active combustion control system has a highly responsive pressure balanced valve assembly with either a flapper or clevis member. The valve member is mounted at one end to an armature of a magnetic drive assembly and a movable part of a flexure pivot otherwise fixed to the valve housing. The armature, flexure pivot and valve member are disposed along a main axis. Magnetic flux selectively pulls the armature toward opposite sides of the main axis causing it and the valve member to pivot in the flexure pivot such that an end of the valve member moves toward or away from an orifice in a nozzle passageway to control metering. The flapper is preferably balanced by a diaphragm piston biasing it in the direction of the nozzle passageway. The alternative clevis arrangement is inherently balanced and can meter fuel through multiple nozzle orifices simultaneously.
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Bastianelli John
Jansen's Aircraft Systems Controls, Inc.
Quarles & Brady LLP
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