Drive unit

Details Drive unit Drive unit

2011-08-23

2011-08-23

Budd, Mark (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

08004151

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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patent: 5932952 (1999-08-01), Takagi
patent: 6107724 (2000-08-01), Tamai et al.
patent: 6643906 (2003-11-01), Kitajima et al.
patent: 7211929 (2007-05-01), Ganor et al.
patent: 2007/0188051 (2007-08-01), Kobayashi et al.
patent: 9-0331687 (1997-12-01), None
patent: 10-084682 (1998-03-01), None
patent: 3744111 (2005-12-01), None

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