Electrohydrodynamic (EHD) fluid mover with field shaping feature at leading edge of collector electrodes
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United States of America Patent
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Aug 13, 2013
Grant Date -
Oct 25, 2012
app pub date -
Dec 2, 2011
filing date -
Apr 22, 2011
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Abstract
Small form-factor ion flow fluid movers that provide electrostatically operative surfaces in a flow channel adjacent to an emitter electrode, but upstream of a collector electrode or electrodes, can shape operative electric fields and influence ion flows in ways that accentuate downstream flow while minimizing upstream ion migration. In some cases, dielectric surfaces (or even electrically isolated conductive surfaces) along a flow channel adjacent to an emitter electrode can be configured to collect and retain an initial population of generated ions and thereafter electrostatically repel further ions. Depending on the configuration of such dielectric or electrically isolated conductive surfaces, these repelling electrostatic forces may dissuade ion migration or flow from sensitive but closely proximate components and/or may shape fields to enhance ion flows in a desired downstream direction.
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