US 6,084,493 AGranted

Electromagnetic valve with integrated non-return valve

AssigneeRobert Bosch GmbH

InventorHeinz Siegel

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Abstract

A magnet valve having a rod-like base body for insertion into a stepped bore of a hydraulic block through which a valve tappet reaches a valve closing ball and on whose face end remote to an armature a cup-shaped sleeve is mounted. A valve seat of the magnet valve is embodied on the bottom of the cup-shaped sleeve. In order to make a large flow cross section available for a flow through the magnet valve in one flow direction, a check valve is integrated with the magnet valve and that to this end flow openings are disposed on an imaginary circle in the bottom of the cup-shaped sleeve. The openings are closed by an annular valve closing body of the check valve. The magnet valve of the invention is intended particularly for use as a brake pressure buildup valve for a wheel brake cylinder of a slip-controlled vehicle brake system.

Claims19

Dependent claims

A magnet valve (10), comprising an armature (20) for actuating a valve closing body (40), a coil (24) for actuating the armature (20), a cup-shaped sleeve (46) in an interior of a hydraulic block (32) in which the valve closing body (40) is located and in a bottom (44) of said cup shaped sleeve a flow opening (50) having a valve seat (42) for the valve closing body (40) is mounted, and at least one further flow opening (58), disposed on the bottom (44) of the cup-shaped sleeve (46) laterally of the flow opening (50) for the armature-actuated valve closing body (40), a check valve (60, 56;

64, 70) having, a valve closing body (56;
64;
70) for closing the at least one further flow opening (58), the cup-shaped sleeve (46) is a shaped sheet-metal part made without metal-cutting machining, said bottom (44) has a plurality of said flow openings (58) for the check valve (60, 56;
64;
70) which are disposed along an imaginary circle around the flow opening (50) for the armature-actuated valve closing body (40), and that the valve closing body (56;
64;
70) of the check valve (56;
64;
70) is embodied in the form of an annular disk that extends along the bottom (44) on a side of the cup-shaped sleeve (46) remote from the armature-actuated valve closing body (40), and is retained by a component (59;
63) mounted on an outer circumference of the cup-shaped sleeve (46).

7 more elements

Dependencies are inferred from the claim text.