Patent ID: 9127437
Filing Date: 2015-09-08
Classification: E02F,F15B

Abstract:
1. A hydraulic system comprising, an actuator having a first fluid chamber and a second fluid chamber; a poppet valve having an open position and a closed position, the poppet valve including a pressure chamber defined in part by a first working surface biasing the poppet valve toward the closed position; a shuttle valve in fluid communication with the first and second fluid chambers, the shuttle valve being configured to selectively pass fluid from the fluid chamber having a higher pressure; and a control valve movable between a first position facilitating fluid communication between the pressure chamber and the fluid selectively passed by the shuttle valve, and a second position facilitating fluid communication between the pressure chamber and the first fluid chamber, the control valve biased towards the first position by fluid in a second pilot line and biased towards the second position by fluid in a first pilot line.