Piezo-Hydraulic Linear Actuator For Vibration Control
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United States of America Patent
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Issued Date -
Aug 14, 2008
app pub date -
Jun 28, 2006
filing date -
Jun 28, 2005
priority date (Note) -
Abandoned
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Abstract
A piezo-hydraulic linear actuator (1) for controlling the vibrations through a piezoceramic element (7) that acts onto a proper liquid placed inside a cavity (3) (similar to a Helmholtz resonator configuration) by means of a flexible metallic membrane (8). The equipment whose vibrations must be controlled is fastened to a mobile plate (4) placed onto anyone of the cavity walls. The cavitation phenomena can be avoided by using two piezoceramic elements (7,9) acting onto the liquid in phase opposition one with respect the other one. The actuator can be designed to control the vibrations on one, two or three axes.
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