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Rotary motor driven by a piezoelectric composite laminate

Authors Lee, Ricky Shi-Wei
Li, Hing Leung
Issue Date 1999-08-24
Source US Patent , 5,942,838. Washington, DC: US Patent and Trademark Office, 1999.
Summary There is described a rotary motor in which a rotor disc is driven by a plate-like driving member comprising a laminate of piezoelectric material sandwiched between outer layers of anisotropic material. When a voltage is applied to the rotor disc the driving member expands into driving contact with the rotor disc and─at the same time─owing to the anisotropy of the outer layers, twists with a torsional movement and this torsional movement imparts a rotary movement to the rotor disc.
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Language English
Format Patent
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