Shape memory alloy actuators for aircraft landing gear
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United States of America Patent
Stats
-
Sep 28, 2004
Grant Date -
Jul 18, 2002
app pub date -
Feb 11, 2002
filing date -
Dec 20, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Shape memory alloy actuators for aircraft landing gear are provided. In one embodiment a retractable aircraft landing gear system is provided. This embodiment includes a shape memory spring strut having a first end and a second end wherein the shape memory spring strut is extendable from a first length to a second length and the shape memory spring strut contains a shape memory alloy. This embodiment also includes a shape memory spring strut activation line connected to the shape memory spring strut wherein the shape memory spring strut activation line may be configured to activate the shape memory spring strut and a longitudinal connecting member having a first segment and a second segment wherein the first segment is in pivotal contact with the first end of the shape memory spring strut and the second segment supports a wheel rotatably mounted on a pin. The connecting member may be moveable along a line of travel from an extended position to a retracted position in this embodiment.
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