MULTI-SECTION HYDRAULIC DRIVE OF CRANE-MANIPULATOR Russian patent published in 2009 - IPC B66C23/86 

FIELD: transport.

SUBSTANCE: multi-section hydraulic drive of the crane-manipulator comprises two hydraulic units, pumping station, safety appliances, i.e. safety valve, flap valve, broken line valve, control system with lever-type control elements and hydraulic lines. The latter comprise pressure, drain, two control, actuator pressure and drain pressure lines. The hydraulic unit comprises six hydraulic control valves, the second hydraulic unit includes three hydraulic control valve. Both aforesaid units the number of hydraulic control valves complying with the number hydraulic drive sections. The hydraulic drive comprises adapters communicating with the crane beam hydraulic control valves.

EFFECT: higher safety and reliability.

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