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 two-stage chambers. Installed in the first stage is rod passed through tore which is arranged in chamber second stage filled with compressed gas. Installed in the second stage is driving drum connected with rod by rope. The first stage of chamber is communicated with suction and discharge pipes. EFFECT: higher efficiency. 1 dwg