Multi-frequency ultrasonic cleaning method and apparatus
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United States of America Patent
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Dec 31, 1991
Grant Date -
N/A
app pub date -
Nov 13, 1989
filing date -
Nov 22, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
When output signals of different multi-frequencies are supplied to one vibrator every short time interval, ultrasonic waves generating from the vibrator having continuing frequencies in which frequencies between separated resonance frequencies are supplemented. Therefore, the cleaning effect is improved by the ultrasonic waves.
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