Patent ID: 6691604
Filing Date: 2004-02-17
Classification: F15B

Abstract:
An actuator control circuit to control an ingress of fluid into and an egress of fluid away from an actuator, the actuator including a first and a second port, the actuator control circuit comprising:a source of pressurized fluid configured to direct fluid from a reservoir to at least one of the first and second ports of the actuator; a first poppet valve arrangement, wherein said source of pressurized fluid being fluidly connected with said first port of said actuator through said first poppet valve arrangement; a second poppet valve arrangement, wherein said first port of said actuator being fluidly connected with the reservoir through said second poppet valve arrangement; a third poppet valve arrangement, wherein said second port of said actuator being fluidly connected with the reservoir through said third poppet valve arrangement; and a control valve, wherein said source of pressurized fluid being fluidly connected free of non-return valves with said second port of said actuator through said control valve, wherein said control valve is operable to: i) direct fluid from said source of pressurized fluid to said second port of said actuator, and ii) regeneratively direct fluid from said second port of said actuator through said first poppet valve arrangement to said first port of said actuator.