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Microfluidic ultrasonic particle separators with engineered node locations and geometries

United States Patent

March 31, 2015
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
An ultrasonic microfluidic system includes a separation channel for conveying a sample fluid containing small particles and large particles, flowing substantially parallel, adjacent to a recovery fluid, with which it is in contact. An acoustic transducer produces an ultrasound standing wave, that generates a pressure field having at least one node of minimum, pressure amplitude. An acoustic extension structure is located proximate to said separation channel for positioning said acoustic node off center in said acoustic area and concentrating the large particles in said recovery fluid stream.
Rose; Klint A. (Alviso, CA), Fisher; Karl A. (Brentwood, CA), Wajda; Douglas A. (Urbana, IL), Mariella, Jr.; Raymond P. (Danville, CA), Bailey; Christopher (Oakland, CA), Dehlinger; Dietrich (San Francisco, CA), Shusteff; Maxim (Oakland, CA), Jung; Byoungsok (Palo Alto, CA), Ness; Kevin D. (San Mateo, CA)
Lawrence Livermore National Security, LLC (Livermore, CA)
14/ 246,981
April 7, 2014
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC for the operation of Lawrence Livermore National Laboratory.