Patent ID: 9162186
Filing Date: 2015-10-20
Classification: B01D

Abstract:
1. A filtration assembly for preparing a filtrate or a retentate from a liquid sample, the assembly comprising: a housing; an inlet in the housing for receiving the liquid sample; a filtration chamber comprising a membrane having a retentate side and a filtrate side; a retentate flow path in the housing comprising the retentate side of the membrane and a dead-end channel for trapping air, wherein the dead-end channel is fluidly connectable to a flow path between the inlet and the filtration chamber; a manually operable retentate compression chamber for compressing and decompressing the air in the dead-end channel to facilitate filtration of the liquid sample across the membrane, the manually operable retentate compression chamber being fluidly connectable to the dead-end channel; a 3-port valve disposed at the intersection of the dead-end channel and the flow path between the inlet and the filtration chamber, wherein the 3-port valve is configurable to fluidly connect the dead-end channel and the manually operable retentate compression chamber; and an outlet for removing at least one of the filtrate and the retentate from the housing.