DE102012216385A1 - Replaceable filter element for filter, particularly for fuel or oil filter, has filter material body, valve body of valve and spring pre-stressed to valve body in valve closing direction - Google Patents

Abstract

The replaceable filter element (1) has a filter material body (10), a valve body (20) of a valve and a spring (21) pre-stressed to a valve body in a valve closing direction. All units of the filter element including the valve body and the spring are made from thermally recoverable material. The spring is made from a plastic, particularly polyamide. The spring is an injection molding. An independent claim is included for a filter with filter housing.

Description

The present invention relates to a replaceable filter element, in particular for a fuel or oil filter, which has at least one Filterstoffkörper, a valve body of a valve and a valve body in the valve closing direction biasing spring. Furthermore, the invention relates to a filter, in particular fuel or oil filter, with a filter housing, with at least one integrated valve and with a filter housing interchangeable arranged filter element, which has at least one Filterstoffkörper, a valve body of the valve and a valve body in the valve closing direction biasing spring ,

From the DE 10 2009 040 655 A1 For example, a filter element and a filter having the features indicated above are known. Specifically, this is in the known filter to a fuel filter with a manually operated piston pump It is provided that an inlet valve of the pump is completely or partially part of the interchangeable filter element. The inlet valve preferably has a valve body which is displaceably guided on or in the filter insert and, in its installed state, interacts with a valve seat formed in the fuel inlet. More preferably, the valve body of the intake valve in the closing direction on a Verschiebungswegbegrenzung and a gravity or spring force preload on.

With the known filter element and filter is advantageously achieved that each time a filter element change in the context of a regular filter maintenance every time a new valve body is installed in the filter, which increases its reliability function. If, as provided according to an alternative of claim 3 of the cited document to the prior art, the valve body has a gravity preload in the closing direction, the parts of the filter element can be easily made of thermally recyclable, that is incinerable without environmental hazards materials. However, a gravity preload is on the one hand only feasible with a suitable installation position of the valve body and on the other hand technically unreliable, which reduces the reliability. If a metallic spring, usually a helical spring made of steel, is installed for the preloading of the valve body in the closing direction to increase the functional reliability, on the one hand the manufacturing and assembly costs are increased and on the other hand a non-thermally usable material is introduced into the filter element. This non-thermally recoverable material then has to be removed from the filter element before it is used thermally, after use, or it remains after thermal utilization of an unwanted residue in the form of preload spring left.

In the older, not previously published patent application DE 10 2011 083 787.6 the applicant is a fuel filter of a diesel engine described, which also has a manually actuated piston pump. Here, a lower end disc of the filter element is designed with a valve seat and connected to a valve body carrier, specifically locked, which leads a valve body axially displaceable. Between the valve body and the valve body carrier, a conventional metallic helical compression spring is arranged, which acts on the valve body with a biasing force in the valve closing direction.

Again, by the metallic spring which is installed for the preload of the valve body, a non-thermally recoverable material is disadvantageously introduced into the filter element

For the present invention, therefore, the task is to improve a filter element and a filter of the type mentioned in that on the one hand high reliability of filter element and filter is guaranteed in operational use and on the other hand, a complete thermal utilization of the filter element after its use possible is.

The solution of the first, the filter element part of the task succeeds according to the invention with a filter element of the type mentioned, which is characterized in that all parts of the filter element including the valve body and the spring made of thermally recyclable material.

With the invention is advantageously achieved that the filter element after its use is completely thermally recoverable, without previously a costly removal of non-thermally recoverable parts of the filter element is required.

Preferably, the spring is made of plastic. Thus, the spring can be produced inexpensively. Due to the many plastics available on the market, the most suitable material for the respective application can be selected from this.

In particular, for the purpose of cost-effective mass production is preferably provided that the spring is an injection molded part.

Further manufacturing advantages and cost savings are achieved if, as preferred provided, the valve body and the spring are integrally formed.

For the filter element is further proposed that it has a valve body carrier made of thermally recyclable material having a valve body in the axial direction slidably leading guide and a spring support on which the spring is supported with its remote from the valve body end has. Hereby, the valve body guide and the spring support are integrated into the filter element, without affecting its complete thermal usability.

In order to easily assemble the filter element and to keep the valve body captive, it is proposed that the valve body is engaged in the guide and that the guide and the valve body have cooperating, a movement of the valve body under the force of the spring in the valve closing direction limiting stops.

A further embodiment of the filter element provides that the filter material body has a hollow cylindrical shape and is frontally covered by a respective end plate made of thermally recyclable material and that the valve body carrier is connected to one of the end plates or in one piece. Here, one of the end plates is advantageously used for the arrangement of the valve body carrier.

In an alternative embodiment of the filter element is provided that the filter material body has a hollow cylindrical shape and is supported radially inwardly or radially outwardly by a support body made of thermally recoverable material and that the valve body carrier is connected to the support body or in one piece. In this embodiment, the support body is advantageously used for the arrangement of the valve body carrier.

A well-suited for many applications of the filter element plastic is polyamide (PA), which has both a good mechanical stability and high resistance to temperatures and chemical influences occurring in conventional applications.

The solution of the second part of the task relating to a filter succeeds according to the invention with a filter of the type mentioned above, which is characterized by a filter element according to one of claims 1 to 9. With the filter according to the invention, the advantages described above in connection with the filter element also become achieved for the filter in total.

A preferred embodiment provides that the filter is a fuel filter, the filter housing each having a raw fuel inlet and pure fuel discharge and a pump cylinder in which a arranged on a piston rod piston of a reciprocating pump is guided axially displaceable, wherein the integrated valve arranged coaxially with the pump cylinder Pump outlet valve is. In such a fuel filter, the filter element described above can be advantageously used with its valve parts.

So that the pump outlet valve when not using the fuel pump no flow resistance for the fuel flowing through the fuel filter, it is provided that is located in an inserted basic position piston through this the valve body against the force of the spring in its open position.

In order to easily realize the aforementioned technical function, expediently the piston on its side facing the valve body or the piston rod at its end facing the valve body on a projection which is in the retracted basic position of the piston in the valve open holding system on the valve body.

In the reciprocating pump of the fuel filter, the piston expediently forms the pump inlet valve. In order for this also when not using the fuel pump no flow resistance for the fuel flowing through the fuel filter forms, it is provided that when befindlichem in an inserted basic position piston this from an inner surface of the pump cylinder has a radial and / or axial distance. This distance provides a free flow area for the fuel.

For the purpose of a space-saving design, in particular a low overall height, it is proposed that the pump cylinder protrudes into the filter element and there has a Zylinderendabschnitt with increased inner diameter, in which the piston is in its retracted home position and in which at an axial distance from the piston, preferably as Insert part trained, valve seat is arranged, which forms the valve with the valve body. The valve seat, for example, be a pressed sheet metal part.

In a further advantageous embodiment, it is provided that the piston rod with its end facing away from the piston sealing out of the filter housing and provided there with an actuating handle, by means of which the reciprocating pump is manually operated and the non-use of the reciprocating pump in the retracted position of the piston relative to Filter housing is fixed. As a result, the technical complexity remains advantageously low. At the same time, the reciprocating pump can be reliably set when not in use in its non-use position with inserted piston, for example by screwing the Operating handle with the filter housing. A manual actuation of the reciprocating pump is sufficient in the application described here completely, since the pump is rarely needed, namely at first startup of an associated internal combustion engine, after maintenance of the fuel filter with a filter element change and, as an exception, after an empty tank and the subsequent fuel supply system.

Depending on design specifications and spatial conditions, a raw fuel inlet and a pure fuel outlet of the filter element and the raw fuel inlet and the pure fuel flow of the filter can be arranged differently. If the raw fuel inlet and the clean fuel outlet of the filter element and the raw fuel inlet and the pure fuel outlet of the filter are arranged concentrically to the longitudinal center axis, the filter element can be rotationally symmetrical and used in any rotational position in the filter housing. However, this simple installation is no longer possible if the raw fuel inlet or the clean fuel outlet of the filter element is arranged eccentrically to a central longitudinal axis of the filter element; For this purpose, the invention provides that on the filter housing and the filter element cooperating Positionierführungsmittel are arranged, by means of which the filter element is forcibly guided in its insertion into the filter housing in the circumferential direction in an appropriate position of the pure fuel inlet to the Rohkraftstoffzulauf or Reinstoffstoffauslasses to the pure fuel flow of the filter housing.

Embodiments of the filter element and filter according to the invention will be explained below with reference to a drawing. The figures of the drawing show:

1 a filter element in a first embodiment, in longitudinal section,

2 the filter element in a second embodiment, in longitudinal section,

3 a valve body carrier with valve body and spring as parts of the filter element 2 , in longitudinal section,

4 a one-piece assembly formed by valve body and spring, in view,

5 a fuel filter in a first embodiment, with a filter element according to 1 and with a reciprocating pump, in longitudinal section,

6 the fuel filter in a second embodiment, with a filter element according to 2 and with a reciprocating pump in its normal position, in longitudinal section,

7 the fuel filter off 6 with the reciprocating pump in a first operating position, in longitudinal section, and

8th the fuel filter off 6 and 7 with the reciprocating pump in a second operating position, also in longitudinal section.

In the drawing figures of the drawing and in the following description of the figures, the same parts are always provided with the same reference numerals, so that not every item in each drawing figure must be described again.

The 1 The drawing shows a first embodiment of a filter element 1 in a longitudinal section along its longitudinal central axis 19 , The filter element 1 has a hollow cylindrical filter material body 10 , the front side of each of an upper end disc 11 and lower end disc 12 is enclosed. On the outer circumference of the lower end disc 12 is a sealing ring 14 arranged. In its central area is the frontal disk 12 executed perforated, so here to the interior of the filter cloth body 10 open. On the outer circumference of the filter cloth body 10 is a grid-shaped support body 13 arranged, the filter cloth body 10 In operation, when flowing with a medium to be filtered in the radial direction from the inside to the outside is supported.

The upper end disc 11 has a central opening into which a valve body carrier 3 is inserted from above. Along a circumferential connection area 35 is the valve body carrier 3 with the upper end disc 11 tightly connected, for example, welded or glued. In its upper part has the valve body carrier 3 one concentric with the longitudinal central axis 19 extending opening, in the inner circumference in a matching groove a sealing ring 34 is inserted. From there, the valve body carrier extends 3 in the axial direction down into the interior of the filter cloth body 10 into it and has a guide there 32 in which a valve body 20 concentric to the longitudinal central axis 19 is guided axially displaceable. A lower end of the valve body carrier 3 forms a spring support 31 on which a coil spring 21 is supported with its lower end. At its upper end is the spring 21 integral with the valve body 90 educated. Here are the valve body 20 and the spring 21 preferably made of plastic as an injection molded part. To the valve body 20 Captive in the lead 32 To hold on, these two parts are with stops 33 and 33 ' educated. The valve body 20 with the spring 21 can from the top of the guide 32 be introduced and locked into it, so that then only one limited axial mobility for the valve body 20 given is.

As the 1 illustrates is the embodiment of the filter element shown here 1 constructed rotationally symmetrical, so that it is in any desired rotational position about its longitudinal central axis 19 can be installed in a filter housing of a filter.

It is essential that all parts of the filter element 1 are thermally recoverable, so the complete filter element 1 is combustible after its use in a filter without residues and without environmental hazards. This is achieved in particular by the fact that the spring 21 Here from a thermally recyclable material, concrete plastic, such as polyamide, and not, as usual, is a metal part, which would not be used thermally. Also the two front discs 11 and 12 , the supporting body 13 and the valve body carrier 3 are expedient parts made of thermally recyclable plastic and preferably manufactured as injection molded parts. The seals 14 and 34 are also suitably made of a thermally recyclable material, such as elastomer. The filter body 10 Finally, may suitably consist of a filter paper or filter fleece or another, the necessary filtering effect and thermally recoverable material.

The 2 The drawing shows a second filter element 1 , again longitudinal section along the longitudinal central axis 19 , Different from the previous embodiment is here that the filter cloth body 10 is provided for a flow in the radial direction from outside to inside, including the supporting body 13 now on the inner circumference of the hollow cylindrical filter material body 10 is arranged. At its front sides is the filter cloth body 10 also here from the upper end disk 11 and the lower end disc 12 edged. The lower end disc 12 is executed again closed and on its underside with the feet 15 educated.

From above is through a central opening of the upper end plate 11 again a valve body carrier 3 introduced and in the connection area 35 with the upper end disc 11 tightly connected. Left top in 2 is an eccentrically arranged clean fluid outlet 18 recognizable by which a filtered liquid from the interior of the filter cloth body 10 is deductible. Beforehand, the liquid flows through the filter material body 10 Radially from outside to inside, which entrained in the liquid flow entrained dirt particles from the liquid and in the filter cloth body 10 be withheld. An upper end of the outlet 18 is as a pipe socket with a seal 34 formed on its outer periphery, the insertion of the filter element 1 in a filter housing in sealing engagement with a pure liquid flow can be brought. To the filter element 1 to bring in a matching rotational position in the circumferential direction, is the valve body carrier 3 here with Positionierführungsmitteln 36 in the form of two on the inner circumference of the valve body carrier 3 running opposite to each other inclined ramps, which with corresponding positioning guide means on the filter housing, not shown here of the filter element 1 cooperating receiving filter and form a forced operation.

Furthermore, here also has the valve body carrier 3 a guide 32 on, in which a valve body 20 concentric to the longitudinal central axis 19 is guided axially displaceable. A lower end of the valve body carrier 3 again forms a spring support 31 on which a coil spring 21 is supported with its lower end. At its upper end is the spring 21 integral with the valve body 20 educated.

Different from the first example is that the valve body carrier 3 in 2 is executed completely closed downwards. A flow connection from the interior of the valve body carrier 3 down into the area inside the filter cloth body 10 So here is not possible, which has its reason in that here the filter body 10 to flow in the radial direction from outside to inside.

Further different from the first embodiment is in the filter element 1 to 2 its lower end disc 12 closed formed and on its underside with several feet distributed over the circumference 15 Mistake.

Again, all parts of the filter element 1 including the spring 21 , thermally recoverable, to which the individual parts again consist of all combustible materials without any environmental hazards.

In the 3 the drawing is the valve body carrier 3 out 2 as a single part with the valve body 20 and the spring 21 shown in longitudinal section. With regard to the reference numerals in 3 will be on the description of 2 directed.

In the 4 are the valve body 20 and the spring 21 as a structural unit 22 shown in view. Here it is apparent that the valve body 20 and the spring 21 formed integrally with each other. The unit is expedient 22 manufactured as an injection molded part made of plastic. Of course, a plastic is used, which has the necessary spring properties for the spring 21 having. About the material thickness of the spring 21 and / or about theirs Winding number can also influenced their spring behavior and adjusted appropriately.

5 The drawing shows a filter 4 , Specifically, a fuel filter, especially for diesel fuel of an internal combustion engine, especially in a motor vehicle. The filter 4 has a filter housing 40 and a screw cap connected to the underside thereof 41 , The filter 4 So here is designed as a so-called hanging filter. Inside the filter housing 40 and the screw cap 41 is a filter element 1 arranged here according to the execution 1 corresponds to the drawing. With regard to the individual parts of the filter element 1 Therefore, the description of the 1 directed.

The filter housing 40 includes a reciprocating pump 5 , which serves as needed manual fuel production. The reciprocating pump 5 has a piston 51 that is connected to a piston rod 52 is appropriate. To the piston rod 52 around a pump cylinder runs 50 , in the upper end of a raw fuel feed 47 opens. The piston rod 52 is sealing through the top of the filter housing 40 from the pump cylinder 50 led to the outside and there with an operating handle 53 connected. By means of a screw connection 56 is the operating handle 53 here on the filter housing 40 fixed, causing the reciprocating pump 5 in her in 5 shown and secured.

With a lower cylinder end section 50 ' the pump cylinder protrudes 50 through the openwork upper end disc 11 of the filter element 1 in the valve body carrier arranged there 3 into it. By means of the seal 34 are an outer circumference of the pump cylinder 50 and an inner periphery of the valve body carrier 3 sealed against each other. The pump cylinder 50 , The piston 51 and the piston rod 52 run concentric to the longitudinal central axis 19 ,

The cylinder end section 50 ' is in its inner diameter relative to the inner diameter of the pump cylinder 50 increased. In the in 5 shown basic position of the reciprocating pump 5 is the piston 51 with an associated sealing lip 51 ' in the extended cylinder end section 50 ' and thus has a radial distance from the inner periphery of the cylinder end portion 50 ' , In this way, a free flow cross section on the piston 51 created by.

In the cylinder end section 50 ' is at an axial distance from the piston in its normal position 51 from below a valve seat 55 used, pressed here as sheet metal part frictionally.

Below the valve seat 55 is the valve body 20 in the valve body carrier 3 held and guided axially displaceable. Also the valve body carrier 3 and the valve body 20 are concentric with the longitudinal center axis 19 arranged.

From the lower end of the piston rod 52 extends coaxially to this over the piston 51 a head start 54 down in the in 5 shown operating state in contact with the valve body 20 stands and this against the power of the spring 21 from the valve seat 55 pushed away and holds in an open position, so also through the valve 2 a free flow cross-section is given.

In this basic position of the piston 51 when not using the reciprocating pump 5 can be filtered fuel from the raw fuel feed 47 through the pump cylinder 50 on the piston 51 over, through the open valve 2 through and through the raw fuel inlet 17 of the valve body carrier 3 into the interior of the filter cloth body 10 of the filter element 1 flow without having to overcome a significant flow resistance. As a result, for example, acts on a fuel-promoting fuel pump of an associated, not shown fuel supply system of an internal combustion engine no special burden that could be caused by high flow resistance of the fuel, for example due to a necessary overcoming the spring force of biased in the closing direction valves.

After flowing through the filter material body 10 in the radial direction from inside to outside, the now filtered fuel passes through the clean fuel outlet 18 at the upper end of the filter element 1 to pure fuel flow 48 and can be supplied from there via a continuing line, for example, an injection pump of an associated internal combustion engine.

By means of the circumferential seal 14 is the filter element 1 at its lower end disc 12 against the filter housing 40 , here's the screw cap 41 , sealed. A lowermost area of the screw cap 41 that does not depend on the filter element 1 is taken, serves as a water collection room 42 in which can settle and collect separated from the fuel to be filtered water. For this purpose, the lower end plate 12 open at its central area to allow passage of at an inner surface of the filter cloth body 10 deposited water drops in the water collection room 42 to enable. At the lowest point of the screw cap 41 is finally a water drain valve 43 arranged by opening, if necessary, water from the water collection room 42 can be drained controlled.

6 shows a filter 4 for an example of the alternative embodiment 5 is. In both cases, the filter housing 40 and the screw cap 41 identical; different are the filter elements used therein 1 , this one in 6 the example 2 equivalent.

Next to the filter element 1 includes the filter 4 , which is also a fuel filter here, again a reciprocating pump 5 , Again, the reciprocating pump has 5 one concentric with the longitudinal central axis 19 arranged pump cylinder 50 inside the filter housing 40 , a piston 51 with a circumferential sealing lip 51 ' , a piston rod 52 and one outside the case 40 lying operating handle 53 , here by means of the screw connection 56 on the filter housing 40 is fixed and the reciprocating pump 5 in her in 6 shown basic position, which it occupies when not in use, that is during normal filter operation.

The valve body carrier 3 in 6 corresponds to that in the 2 shown, whose description is referenced.

In filter operation, fuel to be purified flows through the raw fuel feed 47 at the top of the pump cylinder 50 in and through this at the in the extended cylinder end portion 50 ' located piston 51 over and through the open valve 2 therethrough. Unlike the example below 5 But here is the valve body carrier 3 closed at the bottom. Therefore, the incoming fuel flows after flowing through the open valve 2 through an annular gap between the outer circumference of the pump cylinder 50 and the inner periphery of the valve body carrier 3 first back up and then above the upper end disc 11 of the filter element 1 radially outward, then in the axial direction at the upper end disc 11 being through the raw fuel inlet 17 down and there in the Filterstoffkörper 10 , The filter body 10 So here is flowed through in the radial direction from outside to inside, including here the support body 13 on the inner periphery of the filter cloth body 10 is arranged to support this against collapse.

From the inside of the filter cloth body 10 The purified fuel flows up to the eccentric pure fuel outlet 18 of the filter element 1 and by this under sealing by means of the seal 34 to pure fuel flow 48 of the filter housing 40 , For mutual finding of pure fuel outlet 18 and pure fuel flow 48 when installing the filter element 1 in the filter housing 40 serve the already mentioned and described positioning guide means 36 ; on the side of the filter housing 40 For example, is formed as a positioning guide means not visible in the drawing, from the outer circumference of the pump cylinder in the radial direction outwardly projecting nose formed with one of the ramps on the valve body carrier 3 interacts.

The lower end disc 12 of the filter element 1 is closed here, but underfoot with feet 15 provided on an inwardly jumping step of the screw cap 41 of the filter housing 40 stand. Thus, between the lower end disc 12 and the inner circumference of the screw cap 41 a flow gap kept free, through which at the outer periphery of the filter cloth body 10 from the fuel to be filtered separated water droplets down into the water collection room 42 can fall.

For further details in 6 Reference is made to the preceding description.

The 7 and 8th show the filter 4 out 6 in two operating states during actuation of the reciprocating pump 5 which is usually only on first use of the filter 4 as well as after a change of the filter element 1 is required.

According to 7 First, the operating handle 53 the reciprocating pump 5 opposite the filter housing 40 twisted in the loosening direction to the screw connection 56 between the operating handle 53 and the filter housing 40 repealed. The operating handle wanders 53 with the piston rod 52 and the piston 51 relative to the filter housing 40 up, causing the piston 51 from the extended cylinder end section 50 ' in the pump cylinder 50 passes and by means of its circumferential sealing lip 51 ' seals against this. By the movement of the piston rod 52 also has their advantage upwards 54 from the valve body 20 of the valve 2 moved away, causing now the valve body 2 due to the action of the force of the spring 21 sealing to the valve seat 55 is applied. Thus, the valve 2 now closed.

Upon further movement of the operating handle 53 together with the piston rod 52 and the piston 51 upwards, as in 8th shown is due to the closed valve 2 in the bottom of the piston 51 lying part of the pump cylinder 50 creates a vacuum, which leads to an elastic compression of the sealing lip 51 ' of the piston 51 and thus a flow of fuel past the piston 51 from the upper part of the pump cylinder 50 in the lower, under the piston 51 lying part of the pump cylinder 50 leads. The reciprocating pump 5 So works on the principle of a bicycle air pump.

After the piston 51 the upper end of the pump cylinder 50 has reached, the direction of movement by applying a manual pressure on the operating handle 53 conversely, the piston 51 So now moved down. By itself below the piston 51 building up fuel pressure sets the sealing lip 51 ' of the piston 51 sealing against the inner surface of the pump cylinder 50 at and below the piston 51 located fuel is pressed down and opens the valve 2 by placing the valve body 20 against the force of the spring 21 down from the valve seat 55 moved away. Through the open valve 2 The fuel then flows through a between the outer periphery of the cylinder end portion 50 ' and the inner periphery of the valve body carrier 3 formed gap space in the axial direction upwards and then in the radial direction outwards over the upper end disk 11 of the filter element 1 away to the outside. About the annular raw fuel inlet 17 the fuel can then to the outer periphery of the spring element 1 and by the filter material body 10 through to the in 8th because of the opposite 7 90 ° rotated cutting plane invisible pure fuel outlet of the filter element 1 and pure fuel flow of the filter housing 40 stream.

As mentioned above, the valve 2 only with active reciprocating pump 5 used, which only with a first start-up of the filter 4 and after a change of the filter element 1 is required. In both cases there is a fresh filter element 1 with a fresh spring 21 in the filter 4 , In normal filter operation of the filter 4 when not using the reciprocating pump 5 becomes the valve 2 held in its open position. During further use of the filter element 1 until replaced by a fresh filter element 1 becomes the valve 2 Normally no longer needed and consequently not adjusted anymore. Therefore it is for a reliable function of the valve 2 irrelevant, if after a longer period of use at the spring 21 a relaxation, so a fatigue with reduction of the spring force sets. In this respect, in this use, the durability of the properties of the spring 21 no particularly high demands are made, which makes the use of a metallic spring, such as steel spring, without disadvantages dispensable at this point.

LIST OF REFERENCE NUMBERS

1

 filter element

10

 Filter cloth body

11

 upper end disc

12

 lower end disc

13

 support body

14

Seal on 12

15

Feet on 12

17

 Rohkraftstoffeinlass

18

 Reinkraftstoffauslass

19

 Longitudinal central axis

2

 Valve

20

 valve body

21

 feather

22

Building unit off 20 and 21

3

 Valve body support

31

 spring support

32

 guide

33, 33 '

 attacks

34

Seal on 3

35

Connection area between 3 and 11

36

Positioning guide on 3

4

 filter

40

 filter housing

41

 screw

42

 Water collection chamber

43

 Water drain valve

47

 Rohkraftstoffzulauf

48

 Clean fuel outlet

5

 reciprocating pump

50

 pump cylinder

50 '

 Zylinderendabschnitt

51

 piston

51 '

Sealing lip on 51

52

 piston rod

53

 operating handle

54

 head Start

55

 valve seat

56

Screw connection between 53 and 40

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

• DE 102009040655 A1 [0002]
• DE 102011083787 [0004]

Claims (17)

Replaceable filter element ( 1 ), in particular for a fuel or oil filter, the at least one filter body ( 10 ), a valve body ( 20 ) of a valve and the valve body ( 20 ) in its valve closing direction biasing spring ( 21 ), characterized in that all parts of the filter element ( 1 ) including the valve body ( 20 ) and the spring ( 21 ) consist of thermally recyclable material. Filter element according to claim 1, characterized in that the spring ( 21 ) consists of plastic. Filter element according to claim 2, characterized in that the spring ( 21 ) is an injection molded part. Filter element according to one of claims 1 to 3, characterized in that the valve body ( 20 ) and the spring ( 21 ) are integrally formed. Filter element according to one of claims 1 to 4, characterized in that it comprises a valve body carrier ( 3 ) of thermally utilizable material having a valve body ( 21 ) slidably guiding in its axial direction ( 32 ) and a spring support ( 31 ), at which the spring ( 21 ) with its from the valve body ( 20 ) facing away from the end, has. Filter element according to claim 5, characterized in that the valve body ( 20 ) in the leadership ( 32 ) and that the guide ( 32 ) and the valve body ( 20 ), a movement of the valve body ( 20 ) under the force of the spring ( 21 ) in the valve closing direction limiting stops ( 33 . 33 ' ) exhibit. Filter element according to claim 5 or 6, characterized in that the filter material body ( 10 ) has a hollow cylindrical shape and frontally by a respective end plate ( 11 . 12 ) is covered by thermally recyclable material and that the valve body carrier ( 3 ) with one of the front discs ( 11 . 12 ) is connected or integral. Filter element according to claim 5 or 6, characterized in that the filter material body ( 10 ) has a hollow cylindrical shape and radially inward or radially outward of a support body ( 13 ) is supported by thermally recyclable material and that the valve body carrier ( 3 ) with the support body ( 13 ) is connected or integral. Filter element according to one of claims 2 to 8, characterized in that the plastic is polyamide (PA). Filter ( 4 ), in particular fuel or oil filters, with a filter housing ( 40 ), with at least one integrated valve ( 2 ) and with one in the filter housing ( 40 ) interchangeable filter element ( 1 ), which at least one filter material body ( 10 ), a valve body ( 20 ) of the valve ( 2 ) and a valve body ( 20 ) in its valve closing direction biasing spring ( 21 ), characterized by a filter element ( 1 ) according to one of claims 1 to 9. Filter according to claim 10, characterized in that the filter ( 4 ) is a fuel filter, wherein the filter housing ( 40 ) each one raw fuel feed ( 47 ) and pure fuel flow ( 48 ) and a pump cylinder ( 50 ), in which a on a piston rod ( 52 ) arranged piston ( 51 ) a reciprocating pump ( 5 ) is guided axially displaceable, wherein the integrated valve ( 2 ) coaxial with the pump cylinder ( 50 ) is arranged pump outlet valve. Filter according to claim 11, characterized in that in befindlichem in an inserted basic position piston ( 51 ) through this the valve body ( 20 ) against the force of the spring ( 21 ) is fixed in its open position. Filter according to claim 12, characterized in that the piston ( 51 ) at its the valve body ( 20 ) facing side or the piston rod ( 52 ) at its the valve body ( 20 ) end facing a projection ( 54 ), which in the retracted basic position of the piston ( 51 ) in the valve ( 2 ) open holding system on the valve body ( 20 ) stands. Filter according to one of claims 11 to 13, characterized in that in befindlichem in an inserted basic position piston ( 51 ) this from an inner surface of the pump cylinder ( 50 ) has a radial and / or axial distance. Filter according to one of claims 11 to 14, characterized in that the pump cylinder ( 50 ) in the filter element ( 1 protrudes) and there is a Zylinderendabschnitt ( 50 ' ) having an enlarged inner diameter, in which the piston ( 51 ) is in its inserted basic position and in which at an axial distance from the piston ( 51 ), preferably designed as an insert part, valve seat ( 55 ) arranged with the valve body ( 20 ) the valve ( 2 ). Filter according to one of claims 11 to 15, characterized in that the piston rod ( 52 ) with her from the piston ( 51 ) opposite end sealing from the filter housing ( 40 ) led out and there with an operating handle ( 53 ) is provided, by means of which the reciprocating pump ( 5 ) is manually operated and when not in use Reciprocating pump ( 5 ) in the inserted position of the piston ( 51 ) relative to the filter housing ( 40 ) is fixable Filter according to one of claims 11 to 16, characterized in that a raw fuel inlet ( 17 ) or a pure fuel outlet ( 18 ) of the filter element ( 1 ) eccentric to a central longitudinal axis ( 19 ) of the filter element ( 1 ) is arranged and that on the filter housing ( 40 ) and on the filter element ( 1 ) cooperating positioning guidance means ( 36 ) are arranged, by means of which the filter element ( 1 ) when it is inserted into the filter housing ( 40 ) in the circumferential direction in an appropriate position of the pure fuel inlet ( 17 ) to the raw fuel feed ( 47 ) or the pure fuel outlet ( 18 ) to the pure fuel flow ( 48 ) of the filter housing ( 40 ) is enforceable.

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