Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2011-08-30
2011-08-30
Rosenau, Derek J (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S323040
Reexamination Certificate
active
08008841
ABSTRACT:
A stator and a piezo ultrasonic motor including the same. The piezo ultrasonic motor includes a stator including an elastic body having a flat portion at its outer surface and a central hole penetrating the center of the stator with a predetermined size, and a piezoelectric body including a first internal piezoelectric body and a second internal piezoelectric body integrally disposed parallel to each other in a longitudinal direction of the flat portion and providing an external force deforming the elastic body when an AC voltage is applied, a rotor inserted in the central hole and including a contact frictionally contacting an inner surface of the central hole, an elastic part providing an elastic force maintaining close attachment of the contact to the stator. Accordingly, the manufacturing cost decreases by reducing the number of elements and simplifying a structure, and a stable driving characteristic can be achieved.
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Rosenau Derek J
Samsung Electro—Mechanics Co., Ltd.
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