E.i. Dupont De Nemours and Company

Robert A King

Charles F Collier

Alexander D Kopatsis

Thomas P Ladisch

Brian A Deane

Peter M Mrozinski

William E Feathers

Norman P Pih

A reusable apparatus for multiphase, multistage countercurrent liquid separation is presented. The apparatus is particular useful in progressive multistage separation of target microorganisms from background organisms and materials with precise transfer, air exclusion, homogeneous mixing, isolation from the ambient atmosphere, in the absence of valves and at ow cost. The structure has at least one chamber in which a piston-like sliding bottom is sealingly moved or braked and includes internal structure for mixing, preferably a magnetic-stainless steel ball which can be reciprocated from the outside to mix the liquid contents. Motion of the bottom is limited by stops. A number of ways to actuate the apparatus are taught.

Apparatus for mixing liquids used in countercurrent multiphase liquid

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Hockessin, DE, United States of America

Robert A King