Shape memory alloy actuator
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United States of America Patent
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Issued Date -
N/A
app pub date -
Jan 21, 2005
filing date -
Jul 24, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An actuator includes a body displaceable between first and second positions, a holding mechanism for holding the body in the first position, and first and second shape memory alloy wires, the first wire being connected to the body, such that shortening the first wire moves the body from the second position to the first position. A biasing element biases the body for moving it from the first to the second position, the second wire having one end connected to the holding mechanism, such that shortening the second wire releases the holding mechanism for allowing the biasing element to move the body from the first position to the second position. An intermediate lever has one arm attached to the biasing element, and the other arm abutting a projection on the body, such that the force of the biasing element is transmitted to the body by the lever.
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