HYDRAULIC DRIVE Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: inlet of the third hydraulic lock is in communication with the second distributor through the first throttle and first shuttle valve interconnected in series. The other inlet of the valve is connected with the first distributor. The outlet of the first shuttle valve is connected with the control space of the first hydraulic lock whose inlet is connected with the first distributor through the first throttle and first shuttle valve interconnected in series. The other inlet of the valve is connected with the first distributor. The outlet of the first shuttle valve is connected with the control space of the first hydraulic lock whose inlet is connected with the first distributor through pressure valve and the second check valve interconnected in series. The outlet of the check valve is in communication with the control space of the second hydraulic lock through the second shuttle valve. The other inlet of the shuttle valve is in communication with the second distributor connected with the under-piston space of the second hydraulic cylinder through fourth throttle and third shuttle valve connected in series. The other inlet of the third valve is connected with the inlet of the second check valve and one inlet of the fourth shuttle valve whose other inlet is connected with the first distributor and outlet is connected with the inlet of the second hydraulic lock through the third check valve. The inlet of the first check valve is connected with the hydraulic line that connects the third and fourth check valves. The outlet of the check valve is connected to a hydraulic line that connects under- piston space of the second hydraulic cylinder with the third shuttle valve. EFFECT: improved design. 6 dwg