Fluid handling – Systems – Supply and exhaust
Reexamination Certificate
2011-07-26
2011-07-26
Schneider, Craig M (Department: 3753)
Fluid handling
Systems
Supply and exhaust
C251S118000
Reexamination Certificate
active
07984729
ABSTRACT:
A proportional pressure control valve for regulating the pressure level in a hydraulic circuit including a magnet part and a valve part. The valve part includes an inflow opening for the inflow volume flow and two discharge openings. The first discharge opening is for an operating pressure connection and the second discharge opening is for a tank volume flow. The valve part also has a ball seat and a flat seat with an opening. A closing member is operable to control a flow rate through the opening of the flat seat. The valve part also includes a stream deflector disposed between the ball seat and the flat seat that has a circumferential surface configured to deflect a stream filament of the flow by an angle of ≦30 degrees.
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Leydig , Voit & Mayer, Ltd.
Schneider Craig M
ZF Friedrichshafen AG
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