Patent ID: 6357681
Filing Date: 2002-03-19
Classification: B01D,G01N

Abstract:
An apparatus for separating desirable matter from undesirable matter, comprising:a spring having a bore extending longitudinally therethrough and comprising a plurality of coils, at least one end of said spring being connected for linear reciprocation to an oscillator, wherein when said spring is in a compressed state said coils are in close proximity and when in an extended state there is created a plurality of gaps between said coils; and a feeder adjacent a first end of said bore to supply a mixture of desirable matter and undesirable matter into and through said bore at a predetermined pressure, the undesirable matter being of a size larger than the size of said gaps; whereby the desirable matter is extruded between said coils as said spring is extended while the undesirable matter is carried through said bore of said spring to be discharged at a second end thereof.