Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2009-05-20
2010-02-23
Benson, Walter (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
07667373
ABSTRACT:
A drive unit (1) includes a stage (3), a first ultrasonic actuator (4A) for driving the stage (3) in the X direction, and a second ultrasonic actuator (4B) for driving the stage (3) in the Y direction. In driving the stage (3) in only one of the X and Y directions, one of the first and second ultrasonic actuators (4A,4B) corresponding to the one of the directions generates a composite vibration of a longitudinal vibration parallel to a contact surface of the stage (3) and a bending vibration orthogonal to the contact surface, while the other ultrasonic actuator generates only a longitudinal vibration parallel to the contact surface of the stage (3).
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Adachi Yusuke
Mukae Hideaki
Addison Karen B
Benson Walter
Panasonic Corporation
Renner , Otto, Boisselle & Sklar, LLP
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