Wide frequency range electromechanical actuator
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United States of America Patent
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Apr 8, 2008
Grant Date -
Dec 20, 2007
app pub date -
Jun 15, 2006
filing date -
Jun 15, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An electromechanical motor (1), using at least two bimorph, monomorph or multimorph electromechanical actuating elements (6) interconnected by a common actuator backbone (5) is disclosed. The actuating elements (6) are controllable in both a longitudinal direction (L), i.e. in the main extension direction of the actuating element (6), and a flexural direction, i.e. bending of the actuating element (6), separately. The different actuating elements (6) can be controlled individually as well. The actuator (3) dimensions are preferably selected to resonance frequencies in vicinity of a certain frequency. The actuating elements (6) are provided with interaction portions (7) at which any contact between the actuator and a body (2) to be moved is made. In order to operate well both in fine-positioning and resonant motion, the interaction portions (7) are arranged to partially suppress the transfer of acoustic waves between the actuating elements (6) and the body (2) to be moved.
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