Ultrasonic driving device
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United States of America Patent
Stats
-
Jan 9, 1990
Grant Date -
N/A
app pub date -
Sep 14, 1988
filing date -
Sep 20, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A stator consists of a cylindrical piezoelectric vibrator and electrodes respectively divided in two in its inside and outside portions. When alternative current voltage is applied to respective one of divided electrodes in the inside and outside portions, reversible progressive waves generate on the end and side portions of the stator. When a rotary member is combined with the end or side portion of the stator, the rotary member can reversibly be moved.
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