HYDRAULIC SYSTEM FOR CONTROLLING HATCH DRIVES OF FIRE-FIGHTING VEHICLE TANK GROUP Russian patent published in 1994 - IPC

FIELD: aircraft engineering. SUBSTANCE: system has three-position distributors 1-4 autonomous for each flap, flap hydraulic cylinders 5-8 and lock hydraulic cylinders 9-12. The system has three-position distributor 13 common for all hydraulic cylinders of all hatches which one line is connected through reducer 14 and safety valve 15 to cavities of the flap hydraulic cylinders for opening the flaps, and the other line - to cavities of the lock hydraulic cylinders for closing the flaps. The autonomous three-position distributors mounted are connected by corresponding autonomous for each flap hydraulic lines to the cavities of the flap hydraulic cylinders for closing the flaps and by hydraulic lines - to the cavities of the lock hydraulic cylinders for opening the flaps. EFFECT: reduced weight and improved reliability. 1 dwg