Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1995-12-19
2000-06-06
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310317, 310358, 31032316, H01L 4108
Patent
active
060722665
ABSTRACT:
A vibration actuator has an elastic member formed into a ring shape, an electro-mechanical converting element joined to the elastic member, and a relative moving member which is in press contact with the elastic member. In the vibration actuator, the electro-mechanical converting element generates, upon application of a driving signal, a first vibration mode that vibrates in a direction parallel to a reference plane where the ring shape is formed, and a second vibration mode that vibrates in a direction perpendicular to or substantially perpendicular to the reference plane, and the relative moving member moves relative to the elastic member in one- or two-dimensional directions in the reference plane by the first and second vibration modes.
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Ueha et al., "Ultrasonic Motors Theory and Applications," 1993, pp. 84-87.
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Budd Mark O.
Nikon Corporation
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