Drive apparatus having a ball screw using ultrasonic motors concentric with its nuts
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United States of America Patent
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Jul 15, 1997
Grant Date -
N/A
app pub date -
Apr 18, 1995
filing date -
Apr 18, 1994
priority date (Note) -
Expired
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Abstract
A drive apparatus equipped with a ball screw and a plurality of nuts achieves compact size while maintaining output. The above-mentioned effect is obtained by employing ultrasonic motors, concentric with the nuts and ballscrews, which are flat and able to maintain a high output, for driving the nuts.
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