Shape memory alloy actuators and control methods
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United States of America Patent
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Jun 10, 2003
Grant Date -
N/A
app pub date -
Aug 11, 2000
filing date -
Aug 12, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention provides stroke-multiplying shape memory alloy actuators and other actuators using electromechanically active materials [collectively referred to in this application as SMA actuators] providing stroke multiplication without significant force reduction, that are readily miniaturizable and fast acting, and their design and use; economical and efficient control and sensing mechanisms for shape memory alloy actuators (including conventional shape memory alloy actuators as well as the stroke-multiplying SMA actuators of this invention) for low power consumption, resistance/obstacle/load sensing, and accurate positional control; and devices containing these actuators and control and sensing mechanisms.
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