AIR-OPERATED PUMP Russian patent published in 1994 - IPC

FIELD: hydraulic transport. SUBSTANCE: controlling and controlled working chambers are submerged into fluid to be pumped. Each chamber is provided with inlet port with a check valve, delivery pipe line and drain unit with a float drive. A double- sided gas distributor made of case and gate with a drive is in communication with a source of compressed air and with each chamber. One of the ends of each drain unit is positioned within a chamber and the other one is positioned above a level of fluid. The drive of the gate of the gas distributor is made of a float mounted within the controlling chamber. Outlet ports are provided at the top part of the working chambers. The gate of the check valve of the controlling chamber is in communication with the float drive of the drain unit. The gates of the check valves are interconnected kinematically. The drain units are set in the inlets ports. Kinematic connection between the gates are made of two same double-arm levers which are parallel to each other and pivotally mounted above the chambers. The gates of the valves are parallel to each other and pivotally connected to the ends of the double-arms made of a pivot parallelogram. EFFECT: enhanced efficiency. 3 cl, 1 dwg