Patent ID: 8506813
Filing Date: 2013-08-13
Classification: B01L,Y10T

Abstract:
1. An apparatus adapted to extract an ingredient from a liquid by bi-directional transferring of an aliquot of fluid therein, said apparatus comprising: an open compartment having a bottom end, an open end, and wherein said open compartment is adapted to apply reagents and remove purified liquid, wherein said open compartment is operable at a substantially constant ambient pressure; a closed compartment having a closed pressure and having a closed end, a communicating end, said closed compartment having a bottom zone adapted to at least temporarily retain a fraction of said aliquot of fluid, and an upper zone containing an air pocket adapted to generate internal positive and negative pressure; an intermediate transferring-retaining compartment having an intermediate compartment volume, a first end communicating with said open compartment, and a second end communicating with said closed compartment, said intermediate compartment is adapted to at least temporarily retain a fraction of said aliquot of fluid, a flow barrier member, configured between said open and closed compartments and operable with said closed compartment and adapted to inhibit a flow of said aliquot of fluid when said closed pressure is substantially equal to said ambient pressure and to allow said flow of fluid when said closed pressure is substantially different from said ambient pressure, the pressure differential controllable by an external thermo member adapted to alternately change the closed pressure by a cool and a heat cycle, wherein at least one aliquot of fluid is alternately transferrable back and forth said open compartment in response to changes of the closed pressure.