Patent ID: 9151018
Filing Date: 2015-10-06
Classification: E02F,F15B

Abstract:
1. A hydraulic system, comprising: a pump having variable-displacement; a first linear actuator and a second linear actuator coupled to operate in tandem and connected to the pump in closed-loop manner, each of the first and second linear actuators having a first chamber and a second chamber separated by a piston; an accumulator in fluid communication with the second chamber of only the second linear actuator; an inlet passage connected to the pump; a discharge passage connected to the pump; a first valve disposed between the inlet passage and the first chambers of the first and second linear actuators; a second valve disposed between the inlet passage and the second chamber of the first linear actuator; a third valve disposed between the discharge passage and the first chambers of the first and second linear actuators; and a fourth valve disposed between the discharge passage and the second chamber of the first linear actuator.