Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hideaki Mukae0
Date of Patent
August 23, 2011
0Patent Application Number
128294510
Date Filed
July 2, 2010
0Patent Primary Examiner
Patent abstract
A drive unit includes an ultrasonic actuator having an actuator body generating vibration, and diver elements attached to the actuator body to output drive force by generating orbit motion in response to the vibration of the actuator body; and a movable body contacting the driver elements, and relatively moving with respect to the ultrasonic actuator. In a surface of the movable body, which contacts the driver elements, smoothed portions are interleaved with recessed portions which are recessed with respect to the smoothed portions.
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