Patent ID: 9080310
Filing Date: 2015-07-14
Classification: E02F,F15B,Y10T

Abstract:
1. A hydraulic system, comprising: an actuator; a pump having variable displacement; first and second passages connecting the pump to the actuator in a closed-loop manner; a first load-holding valve disposed within the first passage and movable between a flow-blocking position and a flow-passing position; a second load-holding valve disposed within the second passage and movable between a flow-blocking position and a flow-passing position; a regeneration valve connected to the first passage at a location between the actuator and the first load-holding valve and to the second passage at a location between the actuator and the second load-holding valve, the regeneration valve being configured to selectively fluidly connect the first passage with the second passage; a control valve configured to initiate simultaneous movements of the first and second load-holding valves; and a controller in communication with the pump, the control valve, and the regeneration valve, wherein the controller is configured to: