US 11,654,398 B2
Filtration assembly and method for microbiological testing
Philippe Rivat, Dorlisheim (FR); Mathieu Arrault, Dabo (FR); and Vincent Schaal, Geispolsheim (FR)
Assigned to Merck Patent GmbH, Darmstadt (DE)
Appl. No. 16/644,587
Filed by Merck Patent GmbH, Darmstadt (DE)
PCT Filed Sep. 4, 2018, PCT No. PCT/EP2018/073674
§ 371(c)(1), (2) Date Mar. 5, 2020,
PCT Pub. No. WO2019/048402, PCT Pub. Date Mar. 14, 2019.
Claims priority of application No. 17290113 (EP), filed on Sep. 6, 2017.
Prior Publication US 2021/0060494 A1, Mar. 4, 2021
Int. Cl. B01D 61/18 (2006.01); B01D 63/08 (2006.01); B01L 3/00 (2006.01); B01D 29/05 (2006.01); C12M 1/12 (2006.01); C12M 1/26 (2006.01); G01N 1/40 (2006.01)
CPC B01D 63/087 (2013.01) [B01D 61/18 (2013.01); B01D 63/081 (2013.01); B01L 3/502 (2013.01); C12M 25/00 (2013.01); C12M 33/04 (2013.01); C12M 33/14 (2013.01); G01N 1/4077 (2013.01); B01D 2313/04 (2013.01); B01D 2313/12 (2013.01); B01D 2313/13 (2013.01); B01D 2313/16 (2013.01); B01D 2313/50 (2013.01); B01L 2200/026 (2013.01); B01L 2200/0684 (2013.01); B01L 2200/0689 (2013.01); B01L 2300/043 (2013.01); B01L 2300/048 (2013.01); B01L 2300/0681 (2013.01); B01L 2300/0832 (2013.01); B01L 2300/0861 (2013.01); B01L 2300/14 (2013.01); B01L 2400/0694 (2013.01); G01N 2001/4088 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A filtration assembly (1) for microbiological testing, comprising:
a ring-like membrane support (10) holding a filtration membrane (11);
a cylindrical reservoir (20) of which opposite first and second axial ends have openings and a first axial opening is removably and fluid-tightly attachable to the membrane support (10) to define a sample volume adjacent to the filtration membrane (11) on a first axial side of the membrane support (10); and
a drain member (30) removably and fluid tightly attachable to the membrane support (10) to define a drain channel space adjacent to the filtration membrane (11) on a second axial side of the membrane support (10), said drain member (30) having a collecting surface (30a) facing the filtration membrane (11) for collecting fluid having passed through the filtration membrane (11) formed on the membrane support (10), and said drain member (30) further comprises a venting opening (32) penetrating the collecting surface (30a) of the drain member (30) from one side of the collecting surface (30a) to another side of the collecting surface (30a) to allow ambient air to be supplied to the collecting surface (30a), wherein said venting opening (32) is disposed on a radial outer periphery of the collecting surface (30a).