Electro-hydraulic metering valve with integral flow control

Details Electro-hydraulic metering valve with integral flow control Electro-hydraulic metering valve with integral flow control

2007-07-10

2007-07-10

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Relatively movable inlet and exhaust valves for single...

C251S030010

Reexamination Certificate

active

11192036

ABSTRACT:
A metering valve for a work machine hydraulic system is disclosed. The metering valve has a valve body with an inlet and an outlet. The metering valve also has a main poppet disposed within the valve body between the inlet and the outlet. The main poppet has a nose end and a chamber end, and is movable between a flow-passing position at which fluid flows from the inlet to the outlet, and a flow-blocking position at which fluid flow between the inlet and outlet is blocked. The metering valve also has a pilot element movable to selectively communicate the chamber end of the main poppet with a drain, thereby affecting movement of the main poppet between the flow-passing and flow-blocking positions. The metering valve further has a solenoid mechanism operable to move the pilot element. The position of the pilot element is affected by a fluid pressure at the inlet.

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