Hydraulic control circuit for working components, in...

Details Hydraulic control circuit for working components, in... Hydraulic control circuit for working components, in...

E - Fixed Constructions

02

F

E02F 3/85 (2006.01) E02F 9/22 (2006.01)

Patent

CA 2198405

Hydraulic control circuit for working components, in particular in earth-moving machines, said machines comprising a front group provided with actuators controlled by first hydraulic distributors (1,2) and a rear excavator group provided with actuators controlled by second hydraulic distributors (3-8), in said rear excavator group there being present a main arm actuated by a main actuator (13) controlled by a main distributor (3) located upstream of the remaining second distributors (4-8). The main actuator (13) supplies in series the remaining second distributors (4-8) when the pressure downstream thereof is less than a predetermined value and instead discharges the fluid under pressure when said pressure downstream thereof reaches or exceeds said predetermined value. In the front group there is also provided an additional distributor (A-B) which sends the fluid under pressure immediately downstream of the main distributor (3) of the rear excavator group via a bypass line (23).

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