General Electric Company

Martin A Clements

William C Lippmeier

Robert M Ausdenmoore

David J Markstein

Robert M Darby

A nozzle failsafe nozzle actuating system for an aircraft gas turbine engine variable exhaust nozzle having a plurality of pivotal flaps circumferentially disposed about a nozzle centerline and bounding an exhaust gas flowpath in the nozzle is provided with a number of primary actuators which are operably connected to nozzle flaps for pivoting and setting an attitude of the flaps relative to the centerline and wherein each of the primary actuators is extendable between a fully extended position and a fully retracted position, and a failsafe nozzle actuating actuator for setting the attitude of each of the flaps to a failsafe attitude during a failsafe mode of the nozzle actuating system wherein the failsafe attitude is such that each of the primary actuators is at a partially retracted position between the fully extended and the fully retracted positions. A particular embodiment provides actuator assembly wherein a failsafe piston rod of the failsafe actuator is disposed concentrically about a primary rod of the primary actuator and a stop element is provided for the failsafe rod to engage the primary rod when the primary rod is being retracted and the failsafe rod is extended.

Hydraulic failsafe system and method for an axisymmetric vectoring nozzle

A fuel valve comprising main fuel valve connected to a burner staging valve such that fuel flow from the main fuel valve is divided between pilot and main domes in a dual annular combustor. The burner staging valve includes a movable spool located within a fixed sleeve such that the spool may be moved both laterally and rotated within predetermined limits. The movable spool and sleeve include pilot, main and inlet windows arranged such that the inlet windows receive fuel from the main fuel valve and the pilot and main windows split the fuel flow between the pilot and main domes of the combustor.

Two dimensional modulated burner staging valve

An apparatus for bleeding or purging fluid from a fluid line includes a bleed valve permanently affixed to the wall of the fluid line and a valve actuator releasably connected to the bleed valve which is operative to move a spring-biased, one-way valve member in the bleed valve between a valve open and valve closed position. The valve actuator is movable to a valve open position relative to the one-way valve member in response to the spring force exerted by a coil spring or the like, which avoids damage to the biasing spring associated with the one-way valve member. The valve actuator also includes a guard to prevent assembly or disassembly of the valve actuator and bleed valve with the valve actuator in a valve open position.

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Cincinnati, OH, United States of America

Martin A Clements