A filter for filtration of fluids includes a filter cloth arranged in a housing with an inlet and an outlet. An acoustic field produced by an acoustic transducer, can act on the filter cloth. The invention the filter cloth is arranged substantially in a pressure node, i.e. a velocity antinode, of the...http://www.google.com.au/patents/US5085772?utm_source=gb-gplus-sharePatent US5085772 - Filter for filtration of fluids
