US Patent 10588678 Filtration device

A device for separating particulate matter (e.g., cells) from a liquid including a housing defining an elongate chamber disposed between a receiving end and a dispenser end, a plunger slidably inserted within the chamber from the receiving end, an upper disc and a lower disc each independently slidably affixed to the plunger, the lower disc facing the dispenser end and including at least one filter arrangement, and a liquid including particulate matter disposed within the chamber when the upper disc and lower disc are in an aspiration mode. The upper disc is independently slidable with respect to the lower disc to achieve a filtration mode.