| 摘要 |
A hand held device for generating ultrasonic vibrations comprises an elongated tubular casing having therein a piezoelectric vibrator element and a generator that develops an electrical signal having a predetermined ultrasonic frequency that excites the piezoelectric vibrator element into ultrasonic vibration. A work tool protrudes from the casing and is vibrationally coupled to the piezoelectric vibrator element by a vibratory rod and the rod transmits the vibration from the piezoelectric vibrator element to the work tool. A cooling system is disposed within the casing and flows a cooling agent through the device to cool both the piezoelectric vibrator element and the generator and the cooling agent is discharged from the device in atomized form through an opening in the work tool.
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