Ultrasonic motor
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United States of America Patent
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Jul 5, 2016
Grant Date -
Jan 2, 2014
app pub date -
Feb 22, 2012
filing date -
Feb 22, 2011
priority date (Note) -
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Abstract
An ultrasonic motor is described. The ultrasonic motor includes a plurality of plate-shaped piezoelectric ultrasonic actuators. Each of the ultrasonic actuators includes at least one friction element allocated thereto. Each ultrasonic actuator or each of one or more pairs of ultrasonic actuators is assigned an element to be driven. The ultrasonic motor also includes a housing. The ultrasonic motor also includes an electric excitation device. The elements to be driven are movable independently of each other, and each ultrasonic actuator or each of the one or more pairs of ultrasonic actuators is arranged in a holder. The holders are pressed against each other by housing side covers. The friction elements on the ultrasonic actuators are pressed against a friction layer of the corresponding element to be driven by an elastic interlayer that is in contact with edge surfaces of the ultrasonic actuators that are arranged opposite the friction elements.
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