Patent ID: 6658842
Filing Date: 2003-12-09
Classification: F15B,F16H

Abstract:
A hydraulic system comprising,a hydraulic actuator activated by a supplied hydraulic fluid; a control valve for generating a regulated hydraulic pressure or flow for activating said hydraulic actuator; and a control hydraulic circuit for transmitting said regulated hydraulic pressure or flow generated by said control valve to said hydraulic actuator, wherein said hydraulic system further comprising, an air sucking control valve connected to a primary pressure circuit or regulated pressure circuit; an air sucking hydraulic circuit directly connecting said air sucking control valve to said hydraulic actuator; and a check valve provided in said air sucking hydraulic circuit between said air sucking control valve and said hydraulic actuator, allowing a flow of a hydraulic fluid from said air sucking control valve to said hydraulic actuator and preventing a flow of a hydraulic fluid from said hydraulic actuator to said air sucking control valve.