Device for causing an untuned structure to vibrate ultrasonically
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United States of America Patent
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-
Jan 31, 1995
Grant Date -
N/A
app pub date -
Jul 19, 1993
filing date -
Jan 17, 1991
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to the vibration of an untuned structure by means of an ultrasound converter. The main but not unique purpose is to cause a filtering cloth, a perforated metal sheet or a screening mesh to vibrate in order to improve the flow rate in the filtering or sieving process, with equal surface energy, without clogging the mesh or harming the product being processed. The device according to the invention is characterized in that it comprises at least one electro-acoustic converter (12) ridigly fixed to said structure (10) by means of metallic securing elements (14) tuned to the frequency of the converter, the links with the structure being in a maximum region of amplitude (V)j of said securing elements and resonance of the assembly being provided by a nut or any metallic unit tuned as an integral multiple of a half wave length.
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