US Patent 9216373 Filtering unit

A filtering cartridge (2), intended to be contained within an outer casing (TO) provided with an inlet (11) and an outlet (12) so as to filter the fluid which flows from the inlet (11) towards the outlet (12), the filtering cartridge (2) comprising at least one filtering membrane (40), characterized in that it comprises at least one tubular body (30) into which said filtering membrane (40) is fitted so as to be at least partly wound, the tubular body (30) comprising at least one fin (32) having helical development deriving from the internal wall of the tubular body (30).