Proportional directional control valve, and hydraulic circuit and hydropneumatic suspension system having such a valve
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United States of America Patent
Stats
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Nov 29, 2016
Grant Date -
Sep 4, 2014
app pub date -
Feb 24, 2014
filing date -
Mar 1, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a proportional directional control valve for controlling a hydraulic consumer, having a housing with a pressure port, a tank port, and first and second working ports. A control element is movably mounted in the housing. A single actuator is provided for moving the control element, which, in dependence on its position relative to the housing, enables different flow paths between the ports. The control element, starting from a first switching position in which both working ports are connected to the tank port, is movable by the actuator via a second switching position that follows the first switching position, to a third switching position that follows the second switching position. It is possible, by moving the control element from the first switching position into the third switching position, to successively disconnect the two working ports from the tank port and connect them to the pressure port.
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