US 6,315,268 B1Granted

Solenoid and hydraulic valve with a solenoid

AssigneeHydraulik-Ring GmbH

InventorsMarius Cornea, Hans-Ulrich Leutwein, Lorenz Lippert

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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.

Claims12

Dependent claims

A solenoid comprising:

an armature chamber (30) having chamber walls;
a pole core (17) forming one of said chamber walls and having an axial central bore (52);
an armature (45) slidably arranged in said armature chamber (30);
said armature (45) having a central receptacle (46);
an armature piston (50) arranged in said central receptacle (46) of said armature (45) and configured to extend through said axial central bore (52) of said pole core (17), wherein said armature piston (50) consists of a nonmagnetic material;
said armature piston (50) configured to act on a valve member (14) when moved by said armature piston (45);
said armature piston (50) being a tubular member formed of a piece of planar sheet metal and comprising a radially outwardly projecting anti-stick disc (55) configured to define a minimal axial spacing between said armature (45) and said pole core (17);
said radially outwardly projecting anti-stick disc (55) formed as a monolithic part of said tubular member by parts (56) of the sheet metal being bent radially outwardly relative to said tubular member.

5 more elements

Dependencies are inferred from the claim text.