HYDRAULIC SYSTEM Russian patent published in 2015 - IPC F15B11/16 F04B15/02 

FIELD: engines and pumps.

SUBSTANCE: system is intended for concrete pumps and other mobile machines. The system includes the first hydraulic cylinder (210) and the second hydraulic cylinder (220), each of which has stockless chamber (211, 221) and stock chamber (212, 222); a switching valve; and the first channel passing between stockless chamber (211) of the first hydraulic cylinder and stockless chamber (221) of the second hydraulic cylinder. The switching valve controls connection/disconnection of the first channel. In addition, the system includes the second channel connected in parallel to the first channel and passing between stockless chamber (211) of the first hydraulic cylinder and stockless chamber (221) of the second hydraulic cylinder; with that, the switching valve controls the second channel for its connection in a pumping mode at low pressure and disconnection in a pumping mode at high pressure. In case of low-pressure pumping, stockless chambers of two hydraulic cylinders can be connected to each other by means of the first channel or the second channel.

EFFECT: higher reliability of the system.

12 cl, 7 dwg