DIPPER OF EXCAVATOR Russian patent published in 1994 - IPC

FIELD: dippers of mechanical shovels. SUBSTANCE: device has side and rear-walls, bottom with bar, front wall with heel for bar, limit switches, hydraulic cylinders for bottom turning, hydraulic cylindrical controlling bar. Hydraulic cylindrical controlling bottom and bar are intercommunicated with head ends, respectively, through first and second distributing control valves controlled by magnetic coils. First distributing control valve is connected with armatures of first and second magnetic coils. Second distributing control valve is connected with armatures of third and fourth magnetic coils. First magnetic coil is connected with limit switch of bar closed position and second with limit switch of its open position. Third magnetic coil is connected with limit switch of closed position dipper bottom and the fourth magnetic coil with limit switch of opened position of dipper bottom. EFFECT: higher efficiency. 3 dwg