Active vibrational damper
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United States of America Patent
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Sep 8, 2009
Grant Date -
Apr 20, 2006
app pub date -
Oct 20, 2004
filing date -
Oct 20, 2004
priority date (Note) -
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Abstract
A vibration damper and/or isolator for a rotating shaft is provided comprising a hub, an inertia element, a magneto-rheological elastic element interposed between the hub and the inertia element to non-rigidly couple the inertia element to the hub, and an electromagnet operable to produce a magnetic field across the elastic element when energized. The magneto-rheological elastic element, which may comprise a composite of magnetic-responsive particles dispersed within an elastic material, possesses a variable shear modulus that is dependent, at least in part, on the strength of a magnetic field applied to the elastic element.
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