Robustly stable servo-controlled metering poppet valve

Details Robustly stable servo-controlled metering poppet valve Robustly stable servo-controlled metering poppet valve

2007-05-08

2007-05-08

Kershteyn, Igor (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Relatively movable inlet and exhaust valves for single...

C091S459000, C091S433000, C060S461000

Reexamination Certificate

active

11223619

ABSTRACT:
A poppet valve assembly with a control chamber that can be fluidly connected to a number of different hydraulic ports via a pilot valve assembly. The poppet valve assembly includes a poppet valve member whose movement is controlled by filling or draining the control chamber, and which can be hydraulically locked into a given position by fluidly isolating the control chamber from any other hydraulic connections. The poppet valve member includes a control hydraulic surface exposed to fluid pressure in the control chamber. The poppet valve assembly may be part of a valve assembly that includes a plurality of poppet valve assemblies that operably control a hydraulic cylinder connected to an implement of a work machine.

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Hongliu Du; An E/H Control Design For Poppet Valves In Hydraulic Systems; ASME International Mechanical Engineering Congress & Exposition, Nov. 17-22, 2002, New Orleans, Louisiana; pp. 141-148; ASME; New York, New York.

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