DEVICE FOR CLEANING WATER RESERVOIRS AND SAPROPEL EXCAVATION Russian patent published in 1995 - IPC

FIELD: cleaning of water reservoirs. SUBSTANCE: installed in airtight chamber is cylindrical ring through which flexible link is passed. Link is connected with reversing drive. Suction and discharge holes of chamber have check valves. Flexible link may be made of flexible hose. Hose ends are connected with system for supply and discharge of working medium. EFFECT: higher efficiency. 2 cl, 2 dwg