Hydraulic valve, in particular, adjustable pressure control valve

US6397891B1 · kind B1 · utility

Assignee

• Hydraulik-Ring GmbH · DE

Inventors

• Rolf Neuhaus · Lohr, DE
• Bernd Urlaub · Süderbrarup, DE
• Friedrich Zapf · Karlstadt, DE
• Liebhart Zaiser · Karlstadt, DE

Key dates

• Filing date: Aug 11, 2000
• Grant date: Jun 4, 2002
• Expiry date: Aug 11, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86622
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A hydraulic control valve has a solenoid with a coil having an interior. The solenoid also has a pole shoe inserted partially into the interior of the coil, wherein the interior of the coil defines an armature chamber and wherein the pole shoe delimits the armature chamber axially. The solenoid also has an armature arranged in the armature chamber and moveable in the armature chamber relative to the coil. The solenoid further has an armature plunger connected to the armature, wherein the pole shoe has a central bore and wherein the armature plunger is received in the central bore and penetrates the pole shoe. A hydraulic part with a valve housing formed as a mounting bushing and resting against the pole shoe is provided. The valve housing has an axial valve bore. The hydraulic part also has a low pressure area surrounding the valve housing, wherein the valve housing has at least one radial bore connecting the axial valve bore with the low pressure area. The hydraulic part has a valve slide slidably arranged in the valve bore and configured to be moved by the armature via the armature plunger. Between the pole shoe and the valve housing a fluid chamber is formed, wherein the fluid c…