WATER CLEANING FILTER Russian patent published in 1994 - IPC

FIELD: cleaning of water. SUBSTANCE: filter has housing filled with grainy charge, drainage-distributing system and filter operation mode switch. Switch is formed as vertical chamber with movable vessel disposed in its upper part. Vessel has counterweight with rod. provided with valves, which are secured on its end. One valve is designed for discharge of rinse water and other valve is designed for cutting off filtrate discharge branch pipe. Counterweight is secured outside vessel. Rod is rigidly connected with movable vessel. EFFECT: increased efficiency of water cleaning. 2 cl, 2 dwg