Patent ID: 6318234
Filing Date: 2001-11-20
Classification: E02F,F15B

Abstract:
A line vent arrangement for an electro-hydraulic system in a machine having an engine, the electro-hydraulic system having a source of pressurized fluid selectively connected to an actuator through an electro-hydraulic directional control valve, a source of pressurized pilot fluid connected to the electro-hydraulic directional control valve and operative to move the electro-hydraulic directional control valve from its neutral position to its operative position, a reservoir, and an electronic controller, the line vent arrangement comprising:a pressure storage arrangement connected to the electro-hydraulic directional control valve in parallel with the source of pressurized pilot fluid; andan electrically controlled valve disposed between the electro-hydraulic directional control valve and both the source of pressurized pilot fluid and the pressure storage arrangement and operative, when the engine is shut down, to selectively connect the pressure storage arrangement to shift the electro-hydraulic directional control valve in response to receipt of an electrical signal from the electronic controller.