SHAPE MEMORY ALLOY (SMA) ACTUATORS AND DEVICES INCLUDING BIO-INSPIRED SHAPE MEMORY ALLOY COMPOSITE (BISMAC) ACTUATORS
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United States of America Patent
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Issued Date -
Jul 12, 2012
app pub date -
Dec 12, 2011
filing date -
Dec 10, 2010
priority date (Note) -
Abandoned
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Abstract
An actuator comprising a flexible spring affixed at a separation distance from a shape memory alloy or artificial muscle element amplifies strain developed by the shape memory alloy or artificial muscle element while maintaining a substantial fraction of the force developed during activation of the shape memory alloy or artificial memory element. A plurality of such actuators positioned relative to each other by encapsulation or attachment to a body of material such as a terminal hub can emulate a wide variety of biological movements such as for providing gripping in the manner of an opposed human thumb or propulsion in the manner of a jellyfish.
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