FILTER Russian patent published in 1994 - IPC

FIELD: purifying fluids. SUBSTANCE: filter has case with inlet branch pipe and face cover, drain plug with a magnet, cover with outlet branch pipe, filtering member provided with a perforated pipe whose one end is put on face cover and the other one is coupled with the outlet branch pipe, and filtering shutter spirally wound on the pipe together with spacers which protect spiral faces from flowing fluid and provide desired space between layers of the shutter. The first turn of the shutter is closed on the pipe. The filter also has a sleeve provided with ports for flowing fluid which is put on the pipe provided with the shutter and spacers and prevents the sleeve, shutter and spacers from axial movements relatively the pipe. EFFECT: enhanced filtering performance. 2 cl, 4 dwg