Shuttle valve core and shuttle valve comprising same

Abstract

The shuttle valve spool includes a substantially cylindrical spool body having a shell surface and an axial through bore defining a longitudinal axis. Hydraulic fluid can be directed to a valve chamber formed in the through bore via first and second axial ends of the spool body having different pressure levels. The valve body is housed within the valve chamber and is axially slidable from the first shoulder to the second shoulder and vice versa, such that higher pressure can be directed to the valve chamber and further to at least one collection area on the first circumferential portion of the shell surface via the radially oriented outlet aperture. The discharge region is formed as another recess on the second circumferential portion of the shell surface, which is circumferentially spaced from the collection region by the filtration region. The radial distance from the collection region, the discharge region, and the filter region to the longitudinal axis is less than half the diameter of the shell surface, and the radial distance from the filter region to the longitudinal axis is greater than the radial distance from the collection region to the longitudinal axis.

Description

Technical Field

[0001] This utility model relates to a shuttle valve core, comprising a cylindrical valve core body having a shell surface and a stepped axial through hole. This utility model also relates to a shuttle valve incorporating such a shuttle valve core. Background Technology

[0002] Many hydrostatic products use filters to protect control units from contamination, thereby improving robustness, reliability, and machine availability. Hydraulic control units, in particular, are highly sensitive to contaminants and impurities that can lead to malfunctions. Filtering the control oil supply to a specific particle size is a proven way to minimize problems. The advantage of edge filter designs lies in the strength of components used in conjunction with the system pressure supply control unit.

[0003] Typically, a shuttle valve is a type of valve that allows fluid to flow from one of two sources. Shuttle valves are commonly used in pneumatic and / or hydraulic systems. The basic structure of a shuttle valve uses a tubular valve body that provides three openings, for example, one opening at each end and one radially outward-directing opening between two ends. A ball or other shut-off valve element can move freely within the tube. When pressure from the fluid is applied through the opening at one end, it pushes the ball against the opposite valve seat. This prevents fluid from traveling through the other openings but allows flow through the (outlet) opening located between two openings, for example, at half the distance the ball has traveled. In this way, two different pressure sources can provide pressure without the threat of backflow from one source to the other. Therefore, a shuttle valve operates on the principle of an "OR-gatter".

[0004] A common practice is to use an inline filter element positioned between the shuttle valve inlet and each supply line to the control valve, for example, to prevent unwanted particles or debris from entering and reaching the valve body and / or the control valve. It is also common practice to use an inline filter element in the feed line to prevent any transmission of unwanted particles or debris to the fluid outlet.

[0005] Therefore, in order to complete a known shuttle valve, it is necessary to add an additional filter element, such as a known shuttle valve core, to the shuttle valve's outlet, for example, in the shuttle valve's supply line or valve housing.

[0006] Therefore, in order to complete a common shuttle valve, multiple filter elements need to be installed inside the valve body, which results in expensive and complex shuttle valves with costly installation processes due to the need to assemble multiple parts.

[0007] Despite known requirements for oil cleanliness in hydrostatic systems, reality shows that contaminants are present in many systems. Critical amounts of contaminants can enter the hydraulic system during assembly at the customer's or user's site for hydraulic or pneumatic applications, and may further cause line rejection within the first minute of application. Even later, during operation of the hydraulic or pneumatic unit or unit, contamination can occur due to wear and potentially insufficient filtration. Control units with their valve spool interfaces are sensitive to contaminants, and malfunctions are directly visible to the customer / user of the hydraulic or pneumatic unit. Utility Model Content

[0008] The purpose of this invention is to minimize the effort required to provide, assemble, and install a shuttle valve with filtration capabilities / functions. Another purpose of this invention is to provide a shuttle valve spool that is easy to clean during maintenance. Simultaneously, the shuttle valve should be economical and exhibit a robust design while requiring as little construction space as possible.

[0009] To achieve these objectives, the shuttle valve spool according to a first aspect of the present invention comprises a (cylindrical) spool body having a shell surface and a (stepped) axial through-hole defining a longitudinal axis. Hydraulic fluid can be guided via a first and a second axial end of the spool with different pressure levels to a valve chamber formed in the axial through-hole and limited by a first and a second shoulder. The spool body is housed within the valve chamber and is axially slidable from the first shoulder to the second shoulder and vice versa, such that the higher of the pressures at the first or second axial end is guided into the valve chamber and further guided via at least one radially outwardly oriented outlet port to at least one collection region at the exterior of the spool. The at least one collection region is formed as an axially extending recess on a first circumferential portion of the shell surface of the spool. A discharge region is formed as another recess on a second circumferential portion of the shell surface, which is circumferentially spaced from the collection region by a filtering region. According to this utility model, the radial distance of the collection area, the discharge area, and the filtration area from the longitudinal axis is less than half the diameter of the shell surface, and wherein the radial distance of the filtration area from the longitudinal axis is greater than the radial distance of the collection area from the longitudinal axis.

[0010] The basic idea of ​​this invention, namely, integrating filtration capabilities, especially edge filtration capabilities, is achieved through the shape of the valve core itself using this shuttle valve core. This is accomplished by forming the outer surface of the valve core body in a manner that provides certain areas (i.e., at least one filtration area, at least one collection area, and one discharge area). The surface portions of the valve core body's shell surface corresponding to at least one filtration area, at least one collection area, or discharge area are formed such that when the shuttle valve core according to this invention is positioned in the valve housing, at least one filtration volume, at least one collection volume, and / or discharge volume are formed together with the corresponding inner surface of the valve housing.

[0011] Utilizing this shuttle valve core, and according to the present invention, the basic idea of ​​the present invention is to integrate filtration capabilities, particularly edge filtration capabilities, into the shuttle valve. By implementing the basic idea of ​​the present invention to provide a shuttle valve with a valve core that completes the interaction with the shuttle valve orifice, edge filtration capability / function is possible, thus avoiding the need for additional filter elements such as screens that must be used according to the prior art. When the shuttle valve core according to the present invention is removed from the shuttle valve housing (e.g., during shuttle valve maintenance), the filtration area is part of the outer surface of the shuttle valve core and is therefore very easy to clean even if contaminated with debris. When the shuttle valve core is removed from the shuttle valve, the corresponding inner surface area of ​​the shuttle valve housing can also be easily cleaned.

[0012] According to a preferred embodiment, the collection area and / or discharge area are formed as a flat surface. Such a flat area on the outer surface of the main cylindrical component is very easy to manufacture and therefore very cost-effective.

[0013] In another embodiment, the filtering area is formed by at least one circumferentially cylindrical surface having an outer diameter smaller than that of the valve core housing, wherein the outer diameter of the valve core housing preferably corresponds to the inner diameter of the valve housing bore that receives the valve core.

[0014] By selecting a suitable outer diameter of the filtration area compared to the inner diameter of the corresponding valve housing, which corresponds to the outer diameter of the outer housing of the valve core, the gap width of the filtration gap of the resulting edge filter can be easily defined.

[0015] It is also useful that the radial distance from the filter area to the diameter of the shell surface is less than the radial distance from the discharge area to the diameter of the shell surface.

[0016] This defined feature ensures that the discharge area, which helps to define the discharge chamber, is positioned such that the discharge chamber is large enough to receive a sufficient amount of fluid passing through the filter gaps.

[0017] In another embodiment, the radial distance of the collection area from the diameter of the shell surface is greater than the radial distance of the discharge area from the diameter of the shell surface; however, both areas should be as large as possible, i.e., as large as the available construction area allows.

[0018] This defined feature ensures that the collection area that helps define the collection chamber is positioned such that the collection chamber is large enough to allow a sufficient amount of fluid to flow into the filter gaps.

[0019] In addition, the diameter of the outlet hole is greater than the radial distance from the diameter of the collection area to the shell surface.

[0020] This allows the fluid volume to flow out smoothly and sufficiently.

[0021] In a preferred embodiment, the axial length of the discharge area is greater than the axial length of the collection area and / or the filtration area.

[0022] This allows for the design of flow paths from the collection area to the valve outlet without any additional drilling, and only by machining the outer surface area of ​​the shuttle valve core, which is a non-complex manufacturing step.

[0023] In a preferred embodiment of this invention, the surface dimension calculated by multiplying the axial length of the filter region by the radial distance of the filter region from the diameter of the shell surface is at least as large as the cross-sectional dimension of the outlet orifice. With this design option, a single edge filter gap will be large enough to allow sufficiently high fluid flow rates to pass through without significant flow resistance.

[0024] Especially for fluid flow that must be able to pass through the shuttle valve, it may be useful for the shuttle valve core to have more than one outlet orifice, more than one collection area, more than one filtration area and / or more than one discharge area within / at the valve core body.

[0025] In another preferred embodiment, the valve body of the valve core of this invention for a shuttle valve is a ball. A first shoulder is formed in the valve core body on one side of a first axial end, and a second shoulder is formed on the other side of the valve core body at a second axial end, for example by inserting a hollow plug into the second axial end of the valve core body or by providing a two-part shuttle valve housing, such that the outlet hole of the valve chamber in the valve core body is arranged between the two shoulders, and the first and second shoulders form a valve seat for the valve body, which needs to be placed in the valve chamber of the valve core before completion.

[0026] This allows for a minimum component count strategy for this embodiment of the shuttle valve spool.

[0027] In another embodiment, another first shoulder is also formed by a hollow plug fixed to another first axial end of the valve body. This option allows for the manufacture of symmetrical valve bodies. Furthermore, by inserting a hollow plug with a matching valve seat size, the diameter and size of the two body seats formed on the hollow plug can be easily adapted to a valve body of a given size. Therefore, a valve body of a single shape can be used for various numbers of valve bodies with different sized valve seats.

[0028] According to a second aspect of the present invention, a shuttle valve includes a valve housing having a valve bore defining an axial direction, wherein a shuttle valve core according to a first aspect of the present invention is inserted into the valve bore, wherein the diameter of the valve bore corresponds to the diameter of the housing surface at least in the housing surface region, and wherein a first axial end of the valve core body is connectable to a first pressure inlet, and a second axial end of the valve core body is connectable to a second pressure inlet, wherein, further, a valve outlet in the valve housing is connected to a discharge area.

[0029] In addition to its shuttle valve function, the shuttle valve according to this invention can also achieve integrated filtration capability. This type of shuttle valve, with only one integrated filtration area located upstream of the valve outlet but downstream of the reciprocating function, is cost-effective and easy to maintain.

[0030] In a preferred embodiment, at least one filtration area of ​​the valve core is formed by a filtration gap between the valve core shell surface and the shell wall (i.e., the inner surface of the valve orifice).

[0031] Using this design choice, filtration capacity is achieved through a so-called edge filtration system, which is capable of filtering debris larger than the gap size of the filter gap.

[0032] Furthermore, since at least one collection area on the valve core body forms a collection chamber with the inner surface of the valve orifice, it is easy to form a collection chamber without additional components.

[0033] Furthermore, maximizing the flow rate through the shuttle valve according to this invention may be useful because at least one discharge area on the valve core body forms at least one discharge chamber with the inner surface of the valve orifice. Therefore, the effective flow cross-sectional dimensions can be optimized / adapted to the size of the valve chamber outlet orifice.

[0034] Optionally, a second flow path may be formed on the outer shell of the valve core in a substantially axial direction between the shuttle valve core and the valve housing. In such an embodiment, a second filter gap may be formed between the inner surface of the valve housing and the axially restrictive wall of the discharge area, which is also below the outlet groove to which the discharge area is directed.

[0035] If the valve body can slide between a first cut-off position that closes the first pressure inlet and keeps the second pressure inlet open, and a second cut-off position that closes the second pressure inlet and keeps the first pressure inlet open, then it acquires the function of a hydraulic shuttle valve according to an "OR gate".

[0036] Preferably, the shuttle valve according to this invention includes a maximum height of a filter gap of 0.4 mm. In the preferred use of the shuttle valve spool within the valve housing, the discharge cross-section of the discharge chamber region should meet the flow requirements of the hydraulic unit equipped with the shuttle valve according to this invention, and the axial length of the (radial) filter gap should such that the circumferential filter cross-section formed by the height and length of the filter gap is as large as the discharge cross-section. This ensures sufficient debris filtration capacity while maintaining sufficient flow through the shuttle valve.

[0037] It is likely preferable that the longitudinal length of the filter gap is a minimum of 15 mm to achieve an acceptable low pressure drop across the filter gap, and that the gap height is in the range of one-tenth or a fraction of a mm. Attached Figure Description

[0038] The present invention will be described in more detail with the aid of the accompanying drawings, which illustrate preferred embodiments of the first and second aspects of the present invention, in order to enhance understanding of the basic idea of ​​the present invention. These embodiments do not limit the scope of the present invention, but merely illustrate possible design alternatives, which can be modified within the knowledge of those skilled in the art without departing from the scope of the present invention. The drawings show:

[0039] Figure 1 : A perspective view of the shuttle valve core according to the first aspect of the present invention;

[0040] Figure 2 : A schematic longitudinal section along the longitudinal axis including the shuttle valve core;

[0041] Figure 3 : A cross-sectional view of a plane having a longitudinal axis perpendicular to the shuttle valve core and including the central axis of the outlet orifice. Detailed Implementation

[0042] As used herein, the terms "axial" and "longitudinal" refer to a direction and orientation that extends substantially parallel to the centerline of the hydraulic valve. Furthermore, the terms "radial" and "radially" refer to a direction and orientation that extends substantially perpendicular to the centerline of the hydraulic valve. Additionally, as used herein, the terms "circumferential" and "circumferentially" refer to a direction and orientation that extends in an arc around the centerline of the hydraulic valve.

[0043] like Figure 1 and Figure 2The shuttle valve core 101 according to a first aspect of the present invention includes a predominantly cylindrical valve core body 10. The valve core body 10 has an outer surface referred to as a shell surface 11. It also includes a first axial end 14 and a second axial end 16. The two axial ends 14 and 16 are hydraulically connected via a through-hole 12. The valve core body 10 and the through-hole 12 have a common longitudinal axis 22. A first shoulder 21 is formed within the through-hole 12, defining a valve chamber 5 on the first axial end side of the valve core body 10.

[0044] Contained within the valve chamber 5 is a valve body 20, such as a spherical valve body 20, in which a second shoulder 32 is provided opposite to the first shoulder 21. The second shoulder 32 may be formed by a plug 30, which is inserted into the through hole 12 from another second axial end 16 of the valve core body 10. Both shoulders 21 and 32 form valve seats for the valve body 20. The valve body 20 is slidably accommodated within the valve chamber 5 and is capable of abutting against either the first shoulder 21 or the second shoulder 32, depending on the presence of higher pressure at the axial end 14 or 16. An outlet hole 17 extends radially outward from the valve chamber 5, thereby hydraulically connecting the valve chamber 5 to a collection area 13 located on the outer surface of the valve core body 10.

[0045] In the circumferential direction surrounding the longitudinal axis 22, the collection area 13 is defined by at least one filtering area 15. The filtering area 15 is a portion of the outer surface of the valve core body 10, which, in the installed state of the valve core body 10 within the valve housing 1, forms a filtering gap 8 relative to the inner surface 2.1 of the stepped valve orifice 2 (see...). Figure 3 The maximum distance between the inner surface 2.1 and the filter area 15, i.e., the gap width of the filter gap 8, is preferably less than 0.4 mm. The filter gap 8 operates according to the principle of an edge filter, where debris contained in the fluid passing through the filter gap 8 is blocked and collected at the inlet of the filter gap 8, thereby cleaning the flowing fluid. A discharge area 18 is located on the other side of the circumference of the filter gap 8, from which the filter medium can be guided / discharged toward the valve outlet 7 of the shuttle valve 100.

[0046] As a result, a first flow path I for the fluid is formed from the valve chamber 5 through the outlet orifice 17, the collection area 13, and the filter gap 8 leading to the discharge area 18. The discharge area 18 is connected to the valve outlet 7 of the valve housing 1. Thus, the fluid that is forced to pass through at least one filter gap 8 in the circumferential direction along the first flow path I is filtered.

[0047] according to Figure 2 In the embodiment shown, if the valve body 20 is located at the valve seat formed by the first shoulder 21, the first flow path I connects the second pressure inlet 6 of the valve housing 1 to the valve outlet 7.

[0048] If the valve body 20 is located at another valve seat formed by the second shoulder 32, then the flow path I connects the first pressure inlet 4 to the valve outlet 7.

[0049] Regarding the circumferential direction around the longitudinal axis 22, multiple outlet holes 17 can be arranged. In the case of three outlet holes 17, each outlet hole 17 is offset by, for example, 120° relative to its adjacent outlet hole 17.

[0050] Each outlet orifice 17 communicates with a collection chamber 3, wherein each collection chamber 3 is radially defined inwardly by a collection area 13 of a shuttle valve core 101 and radially outwardly by a corresponding portion of the inner surface 2.1 of a stepped valve orifice 2 opposite to the collection area 13. Each collection chamber 3 is circumferentially defined by two aforementioned defined filter gaps 8.

[0051] A discharge chamber 9 is provided between two adjacent collection chambers 3. Each discharge chamber 9 is radially defined inward by one of the discharge areas 18 of the shuttle valve core 101 and radially outward by the opposing portion of the inner surface 2.1 of the stepped valve orifice 2 opposite to the corresponding discharge area 18. In the circumferential direction, each discharge chamber 9 is defined by two of the aforementioned defined filter gaps 8.

[0052] In addition to the filter bottleneck through which the first flow path I, including the filter gap 8, must pass in the circumferential direction to reach the discharge chamber 9 and subsequently the valve outlet 7, a second auxiliary flow path II can be established. The second flow path II extends from the valve chamber 5 through the outlet orifice 17 into the collection chamber 3, and further through the second filter region 15.1, which is a radially rising region axially adjacent to the collection region 13 in the axial direction, reaching the outlet groove 19, whose position coincides with the valve outlet 7 in the assembled state of the shuttle valve core 101 entering the valve housing 1. Therefore, the collection region 13 can be discharged to the valve outlet 7 via the filter bottleneck (i.e., the second filter region) 15.1. The second flow path II also operates according to the principle of an edge filter and includes a second filter gap 8.1 through which fluid must pass in the primary axial direction.

[0053] The shuttle valve core according to this invention combines shuttle valve functionality and filtration capability into a single valve core body with an external shape that allows the formation of a collection chamber, a filtration gap, and a discharge chamber without any additional components. Therefore, the shuttle valve including the shuttle valve core of this invention is easily assembled, simply by inserting the shuttle valve core into the valve body of the shuttle valve. The shuttle valve functionality and filtration capability can be achieved by inserting the shuttle valve core according to this invention into a valve housing having a suitable valve orifice substantially perpendicular to the valve outlet, from which the filtered fluid can be directed to a fluid-consuming device, such as a control device for a hydraulic unit.

[0054] Furthermore, by simply removing the shuttle valve core from the valve housing, all surface areas of the shuttle valve core, as well as the corresponding inner surface areas of the valve body used to form the collection chamber, the filter gap, and the discharge chamber, can be easily cleaned for cleaning purposes.

[0055] Furthermore, most of the debris filtered during shuttle valve operation will be extracted along with the valve core body by removing the shuttle valve core from the valve housing only along the axial direction of the valve orifice, as the debris will primarily adhere to the valve core body. All other debris adhering to the inner surface of the valve orifice can be wiped off the valve core body as it is extracted from the valve orifice. Therefore, using the shuttle valve core according to this invention significantly reduces maintenance work, as only one valve core must be disassembled for cleaning purposes in bidirectional fluid lines with shuttle valve functionality.

[0056] Finally, it should be noted that this embodiment illustrates the concept of the present invention. The definitions of shape, form, connection, or quantity are merely exemplary and may vary for different applications. However, all modifications within the knowledge of those skilled in the art are covered as long as the concept of the present invention is still implemented.

[0057] As can be understood from the above disclosure, the accompanying drawings, and the claims, the shuttle valve core according to the present invention and the shuttle valve including such a shuttle valve core according to the present invention offer numerous possibilities and advantages over the prior art. Those skilled in the art will further understand that further modifications and alterations known in the art can be made to the shuttle valve core according to the present invention without departing from the spirit of the present invention. Therefore, all such modifications and alterations are within the scope of and covered by the claims. It should also be understood that the examples and embodiments described above are for illustrative purposes only, and various modifications, alterations, or combinations of the embodiments thus suggested to those skilled in the art are included within the spirit and scope of this application.

[0058] List of reference numerals

[0059] 1 Valve body

[0060] 2. Stepped valve orifice

[0061] 2.1 Inner Surface

[0062] 3 Collection Room

[0063] 4 First pressure inlet

[0064] 5 Valve chambers

[0065] 6 Second pressure inlet

[0066] 7 Valve Outlet

[0067] 8. Filter gap

[0068] 8.1 Second Filter Gap

[0069] 9. Discharge Chamber

[0070] 10 Valve core body

[0071] 11 Shell Surface

[0072] 12 Through Holes

[0073] 13 Collection Area

[0074] 14 First Axial End

[0075] 15 Filtering Zones

[0076] 15.1 Second Filtering Zone

[0077] 16 Second Axial End

[0078] 17. Outlet hole

[0079] 18 Emission Zones

[0080] 19. Outlet Groove

[0081] 20 Valve body

[0082] 21 First shoulder

[0083] 22 Longitudinal axis

[0084] 30 plugs

[0085] 32 Second shoulder

[0086] 100 shuttle valve

[0087] 101 Shuttle Valve Core

[0088] I. First Flow Path

[0089] II. Second flow path.

Claims

1. A shuttle valve core (101) comprising a substantially cylindrical core body (10) having a shell surface (11) and an axial through hole (12) defining a longitudinal axis (22). Hydraulic fluid can be guided to a valve chamber (5) via a first axial end (14) and a second axial end (16) of the valve core (10) having different pressure levels. The valve chamber is formed in the through hole (12) and is limited by a first shoulder (21) and a second shoulder (32). The valve body (20) is housed within the valve chamber (5) and is axially slidable from the first shoulder (21) to the second shoulder (32) and vice versa, such that the higher of the pressures at the first axial end (14) or the second axial end (16) can be guided into the valve chamber (5) and further guided via at least one radially oriented outlet port (17) to at least one collection area (13) outside the valve core (10), the collection area being formed as an axially extending recess on a first circumferential portion of the shell surface (11), and a discharge area (18) being formed as another recess on a second circumferential portion of the shell surface (11), the discharge area being circumferentially spaced from the collection area (13) by a filter area (15). The radial distance between the collection area (13), the discharge area (18) and the filter area (15) and the longitudinal axis (22) is less than half the diameter of the shell surface (11), and the radial distance between the filter area (15) and the longitudinal axis (22) is greater than the radial distance between the collection area (13) and the longitudinal axis (22).

2. The shuttle valve core (101) according to claim 1, wherein the collection area (13) and / or the discharge area (18) are designed to be flat.

3. The shuttle valve core (101) according to claim 1 or 2, wherein the filtering area (15) is formed by at least one circumferential cylindrical surface having an outer diameter smaller than the shell surface (11) of the valve core body (10).

4. The shuttle valve core (101) according to claim 1 or 2, wherein the radial distance from the diameter of the filter area (15) to the shell surface (11) is less than the radial distance from the diameter of the discharge area (18) to the shell surface (11).

5. The shuttle valve core (101) according to claim 1 or 2, wherein the radial distance of the collection area (13) from the diameter of the shell surface (11) is greater than the radial distance of the discharge area (18) from the diameter of the shell surface (11).

6. The shuttle valve core (101) according to claim 1 or 2, wherein the diameter of the outlet hole (17) is greater than the radial distance from the collection area (13) to the diameter of the shell surface (11).

7. The shuttle valve core (101) according to claim 1 or 2, wherein the axial length of the discharge region (18) is greater than the axial length of the collection region (13) and / or the filter region (15).

8. The shuttle valve core (101) according to claim 1 or 2, wherein the surface dimension calculated by multiplying the axial length of the filter region (15) by the radial distance of the filter region (15) from the diameter of the shell surface (11) is at least as large as the cross-sectional dimension of the outlet hole (17).

9. The shuttle valve core (101) according to claim 1 or 2, wherein more than one outlet port (17), a collection area (13), a filtration area (15) and / or a discharge area (18) are disposed in / on the valve core body (10).

10. The shuttle valve core (101) according to claim 1 or 2, wherein the valve body (20) is a ball, the first shoulder (21) is formed in the valve core body (10) on one side of the first axial end (14), and the second shoulder (32) is formed by a hollow plug (30) inserted into the second axial end (16) of the valve core body (10), such that the outlet hole (17) is arranged between the two shoulders (21, 32), wherein the first shoulder (21) and the second shoulder (32) form a valve seat for the valve body (20).

11. The shuttle valve core (101) according to claim 1 or 2, wherein the second shoulder (32) is formed by a hollow plug (30) fixed to the second axial end (16) of the valve core body (10).

12. A shuttle valve (100) comprising a valve housing (1) having a valve bore (2) defining an axial direction, wherein a shuttle valve core (101) according to any one of claims 1 to 11 is inserted into the valve bore. The diameter of the valve orifice (2) is at least in the region of the shell surface (11) corresponding to the diameter of the shell surface (11), and the first axial end (14) of the valve core (10) is connected to the first pressure inlet (4), and the second axial end (16) of the valve core (10) is connected to the second pressure inlet (6), and the valve outlet (7) in the valve housing (1) is connected to the discharge area (18).

13. The shuttle valve (100) according to claim 12, wherein the at least one filtering region (15) of the valve core (10) forms a filtering gap (8) with the wall, i.e., the inner surface (2.1) of the valve orifice (2).

14. The shuttle valve (100) according to claim 12 or 13, wherein the at least one collection area (13) on the valve core (10) forms a collection chamber (3) with the valve orifice (2).

15. The shuttle valve (100) according to claim 12 or 13, wherein the at least one discharge area (18) on the valve core (10) forms a discharge chamber (9) with the valve orifice (2).

16. The shuttle valve (100) according to claim 12 or 13, wherein the valve body (20) is slidable between a first closed position in which the first pressure inlet (4) is closed and the second pressure inlet (6) is kept open, and a second closed position in which the second pressure inlet (6) is closed and the first pressure inlet (4) is kept open.

17. The shuttle valve (100) according to claim 13, wherein the maximum height of the filter gap (8) is in the range of one-tenth of a mm or a fraction of a mm.

18. The shuttle valve (100) according to claim 13, wherein the longitudinal length of the filter gap (8) is a minimum of 15 mm.

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