DE102012206941A1 - Valve, in particular hydraulically controlled valve - Google Patents

Abstract

The invention relates to a valve (1, 1a, 1b), in particular a hydraulically controlled valve (1, 1a, 1b), having a closing body (5) which is prestressed via a spring element (12, 12a, 12b) and which has a valve seat (9). in a valve body (7, 7a) seals, and a filter assembly (10, 10a, 10b), in which the spring element (12, 12a, 12b) and the closing body (5) are arranged. According to the invention, the spring element (12, 12a, 12b) and the filter assembly (10, 10a, 10b) are made in one piece.

Description

State of the art

The invention is based on a valve, in particular a hydraulically controlled valve, according to the preamble of independent claim 1.

Such hydraulically controlled valves can be used, for example, as storage chamber valves or as check valves in anti-lock braking systems (ABS) and in electronic stability program systems (ESP systems).

From the patent US 7,543,896 B2 For example, a hydraulically controlled storage chamber valve is known in which a spring-loaded ball seat valve is opened via a plunger in the accumulator piston. This is done at a specified for the system balance of power between spring biasing force and hydraulically effective force. The ball seat valve usually consists of a metallic valve body and a pressed onto the valve body plastic filter. The filter absorbs the compression spring and the ball and also takes over the guiding function of the two components. The preassembled module is inserted into the pump housing and fixed and sealed, for example via a self-clinch connection. The actuation of the ball seat valve via a cylindrical metallic plunger, which is pressed into the accumulator piston. The accumulator piston also receives a sealing ring and a guide ring. Between the accumulator piston and the closure lid, which is connected via a Halteverstemmung with the pump housing, there is a correspondingly biased compression spring. The spring force acts against the hydraulically acting force on the accumulator piston and causes an excess of the spring force displacement of the accumulator piston-plunger combination in the opening direction of the storage chamber valve. The ball is moved by the plunger from the seat and opened the storage chamber valve.

In the published patent application DE 42 02 388 A1 For example, a hydraulic brake system for a motor vehicle is described. The brake system described comprises a hydraulically controlled storage chamber valve with a biased via a first compression spring closing element which seals a valve seat in a valve body, and a plunger, which is connected to a loaded by a second compression spring accumulator piston and presses the closing element from the valve seat, if between the spring biasing forces and a hydraulically effective force is a specified balance of forces.

Disclosure of the invention

The valve according to the invention with the features of independent claim 1 has the advantage that the manufacturability of the items can be simplified and the manufacturing cost can be reduced. By integrating the compression spring function in the filter assembly and the one-piece design of the filter assembly with the spring element a very cost-effective production of the valve is possible. Preferably, embodiments of the valve according to the invention are designed as a hydraulically controlled valve. The filter assembly may for example be designed as a one-piece, directly molded plastic element comprising the spring element.

Embodiments of the present invention provide a valve, in particular a hydraulically controlled valve, which comprises a spring element biased closing body, which seals a valve seat in a valve body, and a filter assembly, in which the spring element and the closing body are arranged. According to the invention, the spring element and the filter assembly are made in one piece.

The measures and refinements recited in the dependent claims advantageous improvements of the independent claim 1 valve are possible.

It is particularly advantageous that the filter assembly has a base body with at least one filter element, which is closed at one end by a filter bottom and having an open peripheral edge at the other end.

In an advantageous embodiment of the valve according to the invention, the spring element is connected at one end via a connection to the filter bottom and has at the other end a support which rests on the closing body, which is designed, for example, as economically obtainable ball. On the example, designed as a ring and resting on the closing body system integrally molded spring elements can attack, which allow the stroke of the closing body from a closed position to an open position. The formation of these spring elements, for example, by means of a plastic injection molding by skillful choice of formations jumps and breakthroughs in the injection mold.

In a further advantageous embodiment of the valve according to the invention, the spring element may comprise at least one web which has a single or multiple meandering in the axial longitudinal direction, which starting from the Connection of the spring element running away from a central axis or running towards the central axis is formed. Preferably, several, for example, two or three, designed as webs meander shapes over the circumference of 360 ° evenly or non-uniformly distributed. Alternatively, the spring element may have a single or multi-start screw shape and / or spiral shape. Multi-speed embodiments offer the advantage that by several force application points, which are evenly or deliberately unevenly distributed over the circumference, no or only small lateral forces are exerted on the closing body and a rectilinear opening movement of the closing body is facilitated. On the other hand, however, a particular lateral force and a nichtgeradlinige opening movement of the closing body are desired and given to allow, for example, a defined and power-optimized opening or a predetermined reaction in conjunction with corresponding flow forces and / or a predetermined flow guidance. Both options can be implemented by the integrated pressure spring function in the filter assembly.

In a further advantageous embodiment of the valve according to the invention, the main body of the filter assembly can be made substantially cylindrical. In addition, the main body of the filter assembly may have at least two webs, which connect the peripheral open edge with the filter bottom, wherein between the at least two webs of the base body at least two filter elements can be arranged. Alternatively, the filter elements themselves can be made with sufficient rigidity and take over the task of the connecting webs.

In a further advantageous embodiment of the valve according to the invention, the circumferential open edge may have a larger diameter than the filter bottom, wherein the main body of the filter assembly may form a constriction, which may lead the disposed within the filter assembly spring element and / or disposed within the filter assembly closing body. As a result, the main body of the filter assembly can advantageously take on the task of radial guidance and support of the spring element and / or the closing body. The constriction can be formed for example by at least two connecting webs with large radii. As a result, the radial deflection of the spring element and / or the closing body can be limited. In particular, for the spring elements, this additional function can have a lifetime extending effect due to the lower transverse deflection and the lower load. Alternatively, this guide and / or support of the spring elements and / or the closing body also serve to "force" the spring function and / or the closing body intentionally eccentric, non-linear or other form in a movement to open, close or in intermediate positions advantageous effects, such as rolling of the closing body instead of sliding, etc. to achieve.

In a further advantageous embodiment of the valve according to the invention, the filter assembly can be connected to the open circumferential edge of the body via a positive and / or non-positive and / or material connection to the valve body or a fluid block. By attaching the filter assembly on the valve body, together with the closing body, an assembly can be formed, which can be easily and quickly preassembled in an advantageous manner and then installed as a mounting assembly in a fluid block or in a pump housing. By sliding, adjustable snap or clip connections, the circumferential open edge of the filter assembly can be mounted and held positively on the valve body. The force setting of the spring elements on the closing body can be made by moving the snap or clip connections. Alternatively, the circumferential open edge of the filter assembly can be completely frictionally fixed by pressing on the valve body. Depending on the design of this case, the possible adjustment for the spring force effect can be increased because no length for the snap or clips connections must be maintained. The frictional connection can also be made easier than the snap or clip connection as a reversible connection, since the snap or clip connection must be designed accordingly. Alternatively, the filter assembly can also be connected to the valve body via the circumferential open edge by another reversible or irreversible connection, such as ultrasonic welding. The listed types of connection can be used analogously for connections of the filter assembly with the fluid block or the pump housing.

In a further advantageous embodiment of the valve according to the invention, the main body of the filter assembly can be connected via a positive and / or non-positive and / or material connection with the filter bottom. Thereby, the spring force of the integrated spring elements can be adjusted and adjusted in an advantageous manner during the preparation of this compound. For connection types such as ultrasonic welding, plastic components are suitable. As a result, an interesting scalability of the resilient element is given only by setting in an advantageous manner from a cost point of view.

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. In the drawings, like reference numerals designate components that perform the same or analog functions.

Brief description of the drawings

1 shows a schematic longitudinal sectional view of a valve assembly with two embodiments of a hydraulically controlled valve according to the invention.

2 shows a schematic representation of an embodiment of a spring element for an inventive hydraulically controlled valve.

3 shows a schematic longitudinal sectional view of a valve assembly with two further embodiments of a hydraulically controlled valve according to the invention.

4 shows a schematic longitudinal sectional view of a valve assembly with two further embodiments of a hydraulically controlled valve according to the invention.

5 shows a schematic longitudinal sectional view of a valve assembly with a further embodiment of a hydraulically controlled valve according to the invention.

Embodiments of the invention

How out 1 to 5 can be seen include embodiments of valves according to the invention 1 . 1a . 1b . 1c . 1d . 1e . 1f . 1g , which in the illustrated embodiments each as hydraulically controlled valves 1 . 1a . 1b . 1c . 1d . 1e . 1f . 1g are executed, one each via a spring element 12 . 12a . 12b . 12c . 12d preloaded closing body 5 , which has a valve seat 9 in a valve body 7 . 7a . 7b . 7c seals, and a filter assembly 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g , in which the spring element 12 . 12a . 12b . 12c . 12d and the closing body 5 are arranged. According to the invention, the spring element 12 . 12a . 12b . 12c . 12d into the filter assembly 10 . 10a . 10b . 10c . 10d . 10d . 10e . 10f . 10g designed in one piece, so that a compression spring function in the filter assembly 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g can be integrated.

How out 1 to 5 can be further seen, the filter assembly 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g a basic body 14.4 . 14.6 with at least a first filter element 16.1 . 16.3 on, which at one end through a filter bottom 14 . 14a . 14b . 14c . 14d . 14e with at least one second filter element 16.2 . 16.4 is completed and at the other end an open peripheral edge 18 having. The spring element 12 . 12a . 12b . 12c . 12d is at one end via a connection 14.1 . 14.1a . 14.1b . 14.1c . 14.1d with the filter bottom 14 . 14a . 14b . 14c . 14d . 14e connected and has a support at the other end 12.1 . 12.1a . 12.1b . 12.1c . 12.1d on, which on the preferably designed as a ball closing body 5 rests. The filter assembly 10 . 10a . 10b . 10c . 10d . 10d . 10e . 10f . 10g is at the open surrounding edge 18 of the basic body 14.4 . 14.6 via a positive and / or non-positive and / or material connection 18.1 . 18.1a . 18.1b . 18.1c with the valve body 7 . 7a . 7b . 7c or a fluid block 3 connectable.

In the illustrated embodiments, the valve body takes over 7 . 7a . 7b , which the valve seat 9 carries, the connection to the surrounding fluid block 3 or pump housing. Therefore, the filter assembly is 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g in the illustrated embodiments on the valve body 7 . 7a . 7b attached. By attaching the filter assembly 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g on the valve body 7 . 7a . 7b gets along with the closing body 5 formed an assembly, which advantageously preassembled and then as a mounting assembly in the fluid block 3 or in the pump housing is mounted. The mounting assembly, for example, by caulking the valve body 7 . 7a . 7b at a caulking area 3.1 a introduced into the fluid block or in the pump housing stepped receiving bore 4 be mounted, which is the filter assembly 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g receives. Because of the advantages of this pre-assembly will be only connections below 18.1 . 18.1a . 18.1b . 18.1c between the filter assembly 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g and the valve body 7 . 7a . 7b described. Of course, most of the connections described below can also be between the filter assembly 10 . 10a . 10b . 10c . 10d . 10e . 10f . 10g and the fluid block 3 or pump housing are manufactured.

Embodiments of the valve according to the invention 1 . 1a . 1b . 1c . 1d . 1e . 1f . 1g For example, they can be used as a check valve or as a storage chamber valve for performing an ABS function and / or an ESP function in a hydraulic brake system in a vehicle.

How out 1 can be further seen, the illustrated valve assembly shows two embodiments of the valve according to the invention 1 . 1a . 1b , which is designed as a check valve and in a stepped receiving bore 4 a fluid block 3 or pump housing is arranged. Here, the left half of 1 a first embodiment of the valve 1a and the right half of 1 shows a second embodiment of the valve 1b , At the in 1 illustrated embodiments is sitting as an investment ring running support 12.1 . 12.1a . 12.1b on the closing body 5 on, wherein the executed as an investment ring edition 12.1 . 12.1a . 12.1b one-piece molded spring elements 12 . 12a . 12b attack, which is a stroke of the closing body 5 from a closed position into the illustrated open position. The shape of these spring elements 12 . 12a . 12b takes place for example in a plastic injection molding by skillful choice of formations jumps and breakthroughs in the injection mold. For shaping the spring elements 12 . 12a . 12b with a single or multiple meander shape in the axial direction are in the filter bottom 14 . 14a . 14b breakthroughs 14.2 . 14.2a . 14.2b intended for injection molds. The breakthroughs 14.2 . 14.2a . 14.2b can be covered by subsequent insertion of not shown further filter elements. Alternatively, the main body 14.4 the filter assembly 10 . 10a . 10b and the spring elements 12 . 12a . 12b separated from each other, for example as plastic injection molded parts, are produced. After production, the connections can 14.1 . 14.1a . 14.1b the spring elements 12 . 12a . 12b at the base body 14.4 For example, as an adhesive or welded joints, running.

How out 1 can be further seen, comprises the spring element 12 in the left illustrated first embodiment of the valve 1 . 1a at least one jetty 12a which has a single or multiple meander shape in the axial longitudinal direction, which starting from the connection 14.1a of the spring element 12a is formed running away from a central axis. In the illustrated on the right second embodiment of the valve 1 . 1b includes the spring element 12 at least one jetty 12b which has a single or multiple meander shape in the axial longitudinal direction, which starting from the connection 14.1b of the spring element 12b designed to run towards the central axis. The meander shapes shown are each as webs 12a . 12b executed, for example, two or more webs 12a . 12b distributed over the circumference of 360 ° can be arranged.

How out 1 is further apparent, is in both illustrated embodiments, the filter assembly 10 . 10a . 10b by sliding, adjustable snap and / or clip connection 18.1 . 18.1a at the open surrounding edge 18 of the basic body 14.4 , which corresponding projections in the valve body 7 . 7a embrace, form-fitting on the valve body 7 . 7a mounted and held. The force setting of the spring elements 12 . 12a . 12b can be done by moving the snap and / or clip connection 18.1 . 18.1a still to be made along the arrow directions.

An alternative embodiment of the spring element 12 . 12c is in 2 and is described in with reference to 3 and 4 described embodiments of the valve according to the invention 1 . 1c . 1d . 1e . 1f used. How out 2 it can be seen, the spring element 12 . 12c have a single or multi-start screw shape and / or spiral shape and / or a combination of both. A multi-start design of the spring element 12 . 12c offers the advantage that by several uniformly or deliberately unevenly distributed over the circumference force application points no or only small lateral forces on the closing body 5 be exercised, whereby a rectilinear opening movement of the closing body 5 is relieved. On the other hand, by a certain predetermined transverse force nichtgeradlinige opening movement of the closing body 5 be achieved, for example, to achieve a defined, power-optimized opening or a special reaction in conjunction with the flow forces and / or flow guidance. 2 shows a catchy embodiment of the spring element 12 . 12c , which at one end over the binding 14.1 . 14.1c with the filter bottom 14 . 14c is connected and at the other end in one piece to the running as Anlagering edition 12.1 . 12.1c is formed.

How out 3 can be further seen, the illustrated valve assembly shows two embodiments of the valve according to the invention 1 . 1c . 1d , which is designed as a storage chamber valve and in a stepped receiving bore 4 a fluid block 3 or pump housing is arranged. Here, the left half of 3 a third embodiment of the valve 1c and the right half of 3 shows a fourth embodiment of the valve 1d , At the in 3 illustrated embodiments is sitting as an investment ring running support 12.1 . 12.1c on the closing body 5 on, wherein the executed as an investment ring edition 12.1 . 12.1c a one-piece molded catchy spiral and / or helical spring element 12 . 12c attacks, which is the stroke of the closing body 5 from the closed position into the illustrated open position allows. In the illustrated embodiments of a storage chamber valve 1 . 1c . 1d can the closing body 5 through a pestle 22 , which with one in a storage chamber 6 movably guided accumulator piston 20 is connected, from the valve seat 9 be pressed. For this purpose, the ram passes through 22 a neck-shaped constriction in the valve body 7 . 7a . 7b , at the edge of the valve seat 9 is formed, and presses the closing body 5 from the valve seat 9 when there is a specified balance of forces between the spring biasing forces and a hydraulically-acting force.

How out 3 it can be seen further, is the filter assembly 10 . 10c at the left third embodiment of the valve 1 . 1c via a press fit 18.1 . 18.1b completely non-positive on the valve body 7 . 7b fixed. The force setting of the spring element 12 . 12c can be done by moving the press fit 18.1 . 18.1b still to be made along the arrow directions. Depending on the embodiment, in this case the possible adjustment for the spring force effect can be greater because no length for snap and / or clip connection must be maintained.

How out 3 it can be seen further, is the filter assembly 10 . 10d at the right illustrated fourth embodiment of the valve 1 . 1d analogous to the first and second embodiments 1 by a sliding, adjustable snap and / or clip connection 18.1 . 18.1a at the open surrounding edge 18 of the basic body 14.4 , which corresponding projections in the valve body 7 . 7a embrace, form-fitting on the valve body 7 . 7a mounted and held. The force setting of the spring element 12 . 12c can be done by moving the snap and / or clip connection 18.1 . 18.1a still to be made along the arrow directions.

How out 3 can be further seen, the filter assembly 10 . 10c . 10d axially against the diameter reduction of the stepped receiving bore 4 in the fluid block 3 or support pump housing, as indicated by the dashed lines in 3 will be shown. This can make the connection 18.1 . 18.1a . 18.1b between the filter assembly 10 . 10c . 10d and the valve body 7 . 7a . 7b be relieved of the axial force. However, this requires an exact cost-intensive toleration of the components involved. In addition, then the adjustability of the compression spring force is no longer or only conditionally given.

How out 4 can be further seen, the illustrated valve assembly shows two embodiments of the valve according to the invention 1 . 1c . 1d , which analogous to the embodiments of 3 designed as a storage chamber valve and in a stepped receiving bore 4 a fluid block 3 or pump housing is arranged. Here, the left half of 4 a fifth embodiment of the valve 1e and the right half of 4 shows a sixth embodiment of the valve 1f , Analogous to the in 3 illustrated embodiments sits at the in 4 illustrated embodiments designed as an attachment ring edition 12.1 . 12.1c on the closing body 5 on, wherein the executed as an investment ring edition 12.1 . 12.1c a one-piece molded catchy spiral and / or helical spring element 12 . 12c attacks, which is the stroke of the closing body 5 from the closed position into the illustrated open position allows. Also with the in 4 illustrated embodiments of a storage chamber valve 1 . 1e . 1f can the closing body 5 through a pestle 22 , which with one in a storage chamber 6 movably guided accumulator piston 20 is connected, from the valve seat 9 be pressed.

How out 4 can be further seen, a part of the filter assembly 10 . 10e , here the cylindrical body 14.4 the filter assembly 10 . 10e , in the illustrated on the left fifth embodiment of the valve 1 . 1e above ground level due to a reversible or irreversible connection 19.1 with another part of the filter assembly 10 . 10e , here the filter bottom 14 . 14d , or with the far upwardly extended valve body 7 get connected. The reversible or irreversible type of connection 19.1 can be produced for example as a positive and / or non-positive and / or material connection. Advantageously, during the preparation of this compound 19.1 the spring force of the integrated spring element 12 . 12c by moving the connection 19.1 set and adjusted along the arrow directions. For connection types such as ultrasonic welding, plastic components are suitable. This is an interesting in terms of cost scalability of the spring element 12 . 12c only given by adjustment.

How out 4 it can be seen further, is the filter assembly 10 . 10e in the left illustrated fifth embodiment of the valve 1 . 1e analogous to the first, second and fourth embodiments 1 and 3 through a snap and / or clip connection 18.1 . 18.1a at the open surrounding edge 18 of the basic body 14.4 , which corresponding projections in the valve body 7 . 7a embrace, form-fitting on the valve body 7 . 7a mounted and held. The position of the snap and / or clip connection 18.1 . 18.1a However, unlike the other snap and / or clip connection 18.1 . 18.1a fixed, because the force setting of the spring element 12 . 12c in the preparation of the compound 19.1 at the bottom of the filter assembly 10 . 10e is made.

How out 4 is further apparent, is shown in the right illustrated sixth embodiment of the valve 1 . 1f the filter assembly 10 . 10f at the open surrounding edge 18 of the basic body 14.4 through a cohesive connection 18.1 . 18.1c , such as ultrasonic welding, with the valve body 7 . 7c connected. Advantageously, during the preparation of this compound 18.1 . 18.1c the spring force of the integrated spring element 12 . 12c by moving the connection 18.1 . 18.1c set and adjusted along the arrow directions.

Alternative to the connection types described above 18.1 with an external filter assembly 10 and an inner valve body 7 are also embodiment with internal filter assembly 10 and external valve body 7 possible. In addition to the types of connection described, of course, other suitable reversible or irreversible types of compounds for the preparation of the compound 18.1 between the filter assembly 10 and the valve body 7 be used.

How out 5 can be further seen, the illustrated valve assembly shows a seventh embodiment of the valve according to the invention 1 . 1g , which analogous to the embodiments of 3 and 4 designed as a storage chamber valve and in a stepped receiving bore 4 a fluid block 3 or pump housing is arranged. Analogous to the in 3 and 4 illustrated embodiments sits in the in 5 illustrated embodiment of the valve 1 . 1g a run as an investment ring edition 12.1 . 12.1d on the closing body 5 on, wherein the executed as an investment ring edition 12.1 . 12.1d a one-piece molded spiral and / or helical spring element 12 . 12d attacks, which has no complete spiral and / or screw and the stroke of the closing body 5 from the closed position into the illustrated open position allows. Also at the in 5 illustrated embodiment of a storage chamber valve 1 . 1g can the closing body 5 through a pestle 22 , which with one in a storage chamber 6 movably guided accumulator piston 20 is connected, from the valve seat 9 be pressed.

How out 5 can be further seen, the filter assembly 10 . 10g even the task of radial guidance and support of the integrated spring element 12 . 12d and / or the closing body 5 take. As a result, the radial deflection of the integrated spring element 12 . 12c and / or the closing body 5 be limited in an advantageous manner. Alternatively, this guide / support of the integrated spring element 12 . 12c and / or the closing body 5 also be used to the integrated spring element 12 . 12c and / or the closing body 5 intentionally "eccentric," non-linear, or otherwise "forced" into a given motion to achieve beneficial effects upon opening, closing, or intermediate position.

How out 5 can be further seen, the main body 14.6 the filter assembly 10 . 10g at least two webs, which the circumferential open edge 18 with the filter bottom 14 . 14e connect, wherein between the at least two webs of the body 14.6 at least two filter elements 16.3 are arranged. The surrounding open border 18 has a larger diameter than the filter bottom 14e on, so that the at least two connecting webs a constriction 14.6A form that within the filter assembly 10 . 10g arranged spring element 12 . 12d and within the filter assembly 10 . 10g arranged closing body 5 to lead. The webs have large radii, without edges or molding joints and yet provide sufficient filter surface for a good filter flow.

How out 5 is further apparent, in the illustrated seventh embodiment, the filter assembly 10 . 10g analogous to the first, second and fourth embodiments 1 and 3 by a snap and / or clip connection 18.1 . 18.1a at the open surrounding edge 18 of the basic body 14.4 , which corresponding projections in the valve body 7 . 7a embrace, form-fitting on the valve body 7 . 7a mounted and held. Advantageously, the spring force of the integrated spring element 12 . 12d by moving the connection 18.1 . 18.1a set and adjusted along the arrow directions.

Of course, also the cylindrical body 14.6 the filter assembly 10 from the embodiments 1 to 6 have at least two webs which the circumferential open edge 18 with the filter bottom 14 connect, wherein between the at least two webs of the cylindrical body 14.6 at least two filter elements 16.3 are arranged. Alternatively, in the described embodiments, the filter elements 10 Even with a sufficient rigidity to be performed and take over the task of connecting webs, so that the main body 14.4 . 14.6 the filter assembly 10 can have no or more connecting webs or only one connecting web.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 7543896 B2 [0003]
• DE 4202388 A1 [0004]

Claims (10)

Valve, in particular a hydraulically controlled valve, having a spring element ( 12 ) biased closing body ( 5 ), which has a valve seat ( 9 ) in a valve body ( 7 ) and a filter assembly ( 10 ), in which the spring element ( 12 ) and the closing body ( 5 ) are arranged, characterized in that the spring element ( 12 . 12a . 12b . 12c . 12d ) and the filter assembly ( 10 . 10a . 10b . 10c . 10d . 10d . 10e . 10f . 10g ) are made in one piece. Valve according to claim 1, characterized in that the filter assembly ( 10 . 10a . 10b . 10c . 10d . 10d . 10e . 10f . 10g ) a basic body ( 14.4 . 14.6 ) with at least one filter element ( 16.1 . 16.3 ), which at one end through a filter bottom ( 14 . 14a . 14b . 14c . 14d . 14e ) and at the other end an open peripheral edge ( 18 ) having. Valve according to claim 2, characterized in that the spring element ( 12 . 12a . 12b . 12c . 12d ) at one end via a connection ( 14.1 . 14.1a . 14.1b . 14.1c . 14.1d ) with the filter bottom ( 14 . 14a . 14b . 14c . 14d . 14e ) and at the other end a circulation ( 12.1 . 12.1a . 12.1b . 12.1c . 12.1d ), which on the closing body ( 5 ) rests. Valve according to claim 3, characterized in that the spring element ( 12 ) at least one bridge ( 12a . 12b ), which has a single or multiple meandering shape in the axial longitudinal direction, which starting from the connection ( 14.1a . 14.1b ) of the spring element ( 12 ) running away from a central axis or running towards the central axis. Valve according to claim 3, characterized in that the spring element ( 12 . 12c . 12d ) has a single or multi-start screw shape and / or spiral shape. Valve according to one of claims 2 to 5, characterized in that the basic body ( 14.4 ) of the filter assembly ( 10 . 10a . 10b . 10c . 10d . 10d . 10e . 10f ) is designed substantially cylindrical. Valve according to one of claims 2 to 6, characterized in that the basic body ( 14.6 ) of the filter assembly ( 10 . 10g ) has at least two webs which the circumferential open edge ( 18 ) with the filter bottom ( 14e ), wherein between the at least two webs of the base body ( 14.6 ) at least two filter elements ( 16.3 ) are arranged. Valve according to claim 6 or 7, characterized in that the peripheral open edge ( 18 ) has a larger diameter than the filter bottom ( 14e ), wherein the basic body ( 14.6 ) of the filter assembly ( 10 . 10g ) a constriction ( 14.6A ) which forms the inside of the filter assembly ( 10g ) arranged spring element ( 12d ) and within the filter assembly ( 10g ) arranged closing body ( 5 ) to lead. Valve according to one of claims 1 to 8, characterized in that the filter assembly ( 10 . 10a . 10b . 10c . 10d . 10d . 10e . 10f . 10g ) at the open peripheral edge ( 18 ) of the basic body ( 14.4 . 14.6 ) via a positive and / or non-positive and / or material connection ( 18.1 . 18.1a . 18.1b . 18.1c ) with the valve body ( 7 . 7a . 7b . 7c ) or a fluid block ( 3 ) is connectable. Valve according to one of claims 1 to 9, characterized in that the basic body ( 14.4 ) of the filter assembly ( 10e ) via a positive and / or non-positive and / or material connection ( 19.1 ) with the filter bottom ( 14d ) is connectable.

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