Spiral piezoelectric rotary actuator
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United States of America Patent
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-
Mar 6, 1984
Grant Date -
N/A
app pub date -
Apr 28, 1982
filing date -
Apr 28, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piezoelectric rotary actuator including: a rotatable member; a spiral member fixed at its inner end to the rotatable member; one or more piezoelectric layers attached on one or both sides of the spiral member; means for rotatably supporting the rotatable member relative to the outer portion of the spiral member; and an electrode for applying a voltage across the piezoelectric layer or layers, to bend the spiral and rotate the rotatable member.
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