US 11,865,477 B2
Filtration head for a filter system and funnel for use in conjunction with a filtration head
Didier Metz, Stotzheim (FR); and Marisa Hohnadel, Bischheim (FR)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Appl. No. 17/044,595
Filed by MERCK PATENT GMBH, Darmstadt (DE)
PCT Filed Apr. 3, 2019, PCT No. PCT/EP2019/058397
§ 371(c)(1), (2) Date Oct. 1, 2020,
PCT Pub. No. WO2019/193046, PCT Pub. Date Oct. 10, 2019.
Claims priority of application No. 18290028 (EP), filed on Apr. 5, 2018.
Prior Publication US 2021/0023481 A1, Jan. 28, 2021
Int. Cl. B01D 29/05 (2006.01); B01D 35/30 (2006.01); B01D 63/08 (2006.01)
CPC B01D 29/055 (2013.01) [B01D 35/30 (2013.01); B01D 63/087 (2013.01); B01D 2201/4015 (2013.01); B01D 2313/56 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A filter system comprising a filtration head (1), and a funnel (7)
the filtration head (1) comprising:
a base (2) including a filter support (3) for a removable filter element (4) and a fluid path from one side of the filter element (4) to be placed on the filter support (3), through the filter element (4), and to a drainage outlet (5) of the base (2), and
a holder device (6) for removably attaching a funnel (7) to the base (2) to form a sample fluid reservoir on the one side of the filter element (4),
wherein the holder device (6) comprises a ring-shaped element (8) configured to extend about a bottom peripheral flange (7a) surrounding a lower end of the funnel (7) and to selectively apply a biasing force on a radially outward protruding portion (7b) of the bottom peripheral flange (7a) of the funnel (7) to press the funnel (7) against the base (2)
wherein the base (2) has a contact face (2a) surrounding an outer periphery of the filter support (3) for a fluid tight contact with the bottom peripheral flange (7a) of the funnel (7) to be pressed against the contact face (2a) of the base (2); and
wherein the funnel being cup or cylinder shaped with an open top and an open bottom,
wherein the funnel (7) has a peripheral flange (7a) surrounding a lower end of the funnel (7) and having a radially outward protruding portion (7b).