Patent ID: 7374929

Claim:
Device for microbiological examination of a sample of liquid under pressure, having an intake body ( 2 ), a filtering membrane ( 4 ) and a drainage body ( 3 ), said intake body ( 2 ) having a reservoir ( 5 ), in one wall ( 9 ) of which a liquid input aperture ( 11 ) is made, said membrane ( 4 ) closing said reservoir ( 5 ), said drainage body ( 3 ) having means ( 48 ) of supporting said membrane ( 4 ) on the opposite side from said reservoir ( 5 ) and a liquid output aperture ( 38 ), said intake body ( 2 ) and said drainage body ( 3 ) having mutual locking means ( 7 , 31 ), said membrane ( 4 ) being gripped annularly at the periphery between an annular transverse wall ( 32 ) of the drainage body ( 3 ) situated around said support means ( 48 ) of the membrane ( 4 ) and the lateral wall ( 9 ) of said reservoir ( 5 ) of the intake body ( 2 ), which lateral wall ( 9 ) has first seal ( 13 ) which forms the edge thereof and by means of which this wall ( 9 ) comes into contact with said membrane ( 4 ); wherein said intake body has a frustoconical wall connected to said lateral wall, said frustoconical wall being inclined, and wherein said device ( 1 ) is provided with a second seal ( 55 ) which has an arched profile and a frustoconical wall having an external surface having the same inclination as said frustoconical wall of said intake body, the external annular end ( 61 ) of said second seal bears against said annular transverse wall ( 32 ) radially beyond said membrane ( 4 ), and the internal annular end ( 57 ) of which is connected to said seal ( 13 ) which the lateral wall ( 9 ) of said reservoir ( 5 ) has.