AIR FILTRATION DEVICE Russian patent published in 1997 - IPC

FIELD: air cleaning. SUBSTANCE: proposed device includes body with air supply and discharge branch pipes, screen member and attachment units. Body is provided with partitions having holes forming passage of varying section. Holes in taper partitions are provided with beads and holes in cylindrical partition are inclined and having H-shaped form. Members of partition between holes are deformed to engagement with negative interference of opposite projections of H-shaped holes. EFFECT: enhanced efficiency. 3 dwg