Machine element or mechanism – Control lever and linkage systems
Reexamination Certificate
2006-02-28
2006-02-28
Fenstermacher, David M. (Department: 3682)
Machine element or mechanism
Control lever and linkage systems
C244S219000
Reexamination Certificate
active
07004047
ABSTRACT:
A gas turbine engine includes a variable area nozzle having a plurality of flaps. The flaps are actuated by a plurality of actuating mechanisms driven by shape memory alloy (SMA) actuators to vary fan exist nozzle area. The SMA actuator has a deformed shape in its martensitic state and a parent shape in its austenitic state. The SMA actuator is heated to transform from martensitic state to austenitic state generating a force output to actuate the flaps. The variable area nozzle also includes a plurality of return mechanisms deforming the SMA actuator when the SMA actuator is in its martensitic state.
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Kettle John L.
Miller Robin M.
Rey Nancy M.
Rukus Robert M.
Tillman Thomas G.
Fenstermacher David M.
United Technologies Corporation
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