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

FIELD: cleaning of water reservoirs. SUBSTANCE: pumping unit is made in form of chamber. Driving drum is installed in chamber. Two hoses are wound on drum. Free ends of hoses are turned inside out and attached to chamber inner walls on both sides of drum to form common hollow. Hollow is communicated via check valves with suction and discharge pipes. EFFECT: higher efficiency. 1 dwg