Solenoid and hydraulic valve with a solenoid

US6315268A · kind A · utility

Assignee

• Hydraulik-Ring GmbH · DE

Inventors

• Marius Cornea · Lohr am Main, DE
• Hans-Ulrich Leutwein · Alteglofsheim, DE
• Lorenz Lippert · Kirchberg, DE

Key dates

• Filing date: Jul 24, 2000
• Grant date: Nov 13, 2001
• Expiry date: Jul 24, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86702
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A solenoid for a hydraulic valve has an armature chamber having chamber walls. A pole core forms one of the chamber walls and has an axial central bore. An armature is slidably arranged in the armature chamber. The armature has a central receptacle. An armature piston is arranged in the central receptacle of the armature and extends through the axial central bore of the pole core. The armature piston consists of a nonmagnetic material. The armature piston acts on a valve member when moved by the armature piston. The armature piston is a tubular member formed of a piece of planar sheet metal and has a radially outwardly projecting anti-stick disc that defines a minimal axial spacing between the armature and the pole core. The radially outwardly projecting anti-stick disc is formed as a monolithic part of the tubular member by parts of the sheet metal being bent radially outwardly relative to the tubular member.