Pressure-control valve
The invention relates to a pressure-control valve according to the preamble of claim . A pressure-control valve () comprises a first control piston (), which is disposed between a first pressure chamber (), which adjoins the first control piston () and is connected to at least one working line (A, B...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention relates to a pressure-control valve according to the preamble of claim
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A pressure-control valve () comprises a first control piston (), which is disposed between a first pressure chamber (), which adjoins the first control piston () and is connected to at least one working line (A, B), and a second pressure chamber (), which adjoins the first control piston () and is pushed against a stop () by a first preloading spring (). A throttle () connects the first pressure chamber () and the second pressure chamber (). The second pressure chamber () is connected to a second control piston (), which is preloaded by a second preloading spring () and which, when a predetermined pressure in the second pressure chamber () is exceeded, is displaced to an extent such that a control edge () of the second control piston () clears a connection of the second pressure chamber () to a hydraulic fluid discharge point (). The first control piston () comprises a control edge () which connects an actuating pressure line () to a hydraulic fluid discharge point () when the first control piston () is displaced against the first preloading spring (). An actuator (), which is regulated by a control signal, presses onto the second control piston () against the second preloading spring (). |
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