Power plants – Motor operated by expansion and/or contraction of a unit of... – Mass is a solid
Patent
1998-08-10
1999-12-28
Nguyen, Hoang
Power plants
Motor operated by expansion and/or contraction of a unit of...
Mass is a solid
60527, F01B 2910
Patent
active
060065222
ABSTRACT:
An actuator for at least translationally or linearly moving an object from a first position to a second position displaced from the first position is disclosed. In one embodiment, the actuator includes a strip of shape memory alloy configured as a coil wound about a first rotatably-fixed member, the strip having first and second end portions, the first end portion being interconnectable to the first rotatably-fixed member and the second end portion being operatively associated and/or interconnectable with the object to be moved, and a heating assembly adapted to heat at least a portion of the strip of shape memory alloy from a first temperature corresponding to the strip being in a martensitic state to a second temperature corresponding to the strip being in an austenitic state, the second temperature being above a martensitic/austenitic transformation temperature of the shape memory alloy. Such heating of the strip to the austenitic state results in at least radially-outward and arcuate movement of the second end portion of the strip which, in turn, may move the object translationally.
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Foss, Jr. Richard L.
Siebrecht Wayne A.
Lockheed Martin Corporation
Nguyen Hoang
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