Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Reexamination Certificate
2006-08-29
2006-08-29
Casaregola, Louis J. (Department: 3746)
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
C137S613000
Reexamination Certificate
active
07096658
ABSTRACT:
A fuel system for a gas turbine engine that utilizes a centrifugal pump is presented. The system includes a fuel metering valve that is adapted to set a metered flow of fuel, and a throttle valve that is adapted to accurately control pressure drop across the fuel metering valve. The throttle valve has at least two variable orifices and a compensation chamber between the variable orifices. The throttle valve includes a differential valve piston slidable in a valve body. The differential valve piston comprises working surfaces of at least two different diameters such that changes in chamber pressures effect different axial forces upon the piston.
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Hommema Edward L.
Schaefer Paul J.
Wernberg Donald E.
Casaregola Louis J.
Reinhart Boerner Van Deuren P.C.
Woodward Governor Company
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