Patent ID: 9377034
Filing Date: 2016-06-28
CPC Classification: E02F,F15B

Claim Text:
1. A working machine comprising: a plurality of hydraulic actuators; a variable displacement hydraulic pump for supplying pressure oil to these hydraulic actuators; and a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, wherein the working machine is provided with: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to said PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced lower than that in said first load pressure flow passage.