Patent ID: 11865477
Assignee: MERCK PATENT GMBH
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 0:
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).