• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SUPPORT SCREEN STRUCTURE. The present invention relates to a support web (10) for a media pack (30). The support web (10) comprises a plurality of longitudinal bundles (11) and at least one fin (12) and the longitudinal bundle (11) has first and second ends and is arranged to be mounted on the media pack (30) in the longitudinal direction. The fin (12) is attached to the longitudinal bundles and arranged to extend in the lateral direction of the media pack (30) and adapted to direct an air flow passing through the support web (10) in a preferred direction. The invention further relates to a media packet with a supporting screen and a V-type filter having a plurality of media packets.
    公开号:BR112015005591B1
    申请号:R112015005591-5
    申请日:2012-12-05
    公开日:2021-07-06
    发明作者:Kenny Hedlund
    申请人:Camfil Ab；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to filter assemblies for removing particles from an air flow, and more particularly to a supporting screen structure for a media pack, in particular for a media pack comprising a media. filter applied in a V-type arrangement. FUNDAMENTALS OF THE INVENTION
    [002] Filter sets comprising applied media packets arranged in a frame structure are known. A plied filter pack is typically formed from a sheet of filter media, for example, a sheet of fiberglass, or a sheet of non-woven polyester, which is plied to increase the effective filtration area of the filter body. . To provide mechanical support and/or to combine a plurality of media packets, the media packet is typically arranged in a frame structure, such as a frame having a V-type arrangement. In order to improve the physical properties of the applied filter medium, it is known to provide different types of support elements so that the deformation during use of the filter medium can be reduced. Deformation can, in the worst case, result in a breakage of the filter medium. But even if the filter media doesn't break, the filter media deformation causes adjacent media packets to approach each other or even come into contact. Both events result in an increase in the pressure drop across the filter as air cannot flow as intended through the filter. An example of support is illustrated in WO 2010/151542 where a flexible but inextensible grid is attached to a downstream surface of a filter medium. While the use of such a grid has advantages over using a filter medium without any support and prevents the filter medium from deforming to some extent, it still has some disadvantages. For example, since the grid is fixed to the folds of the filter medium itself, forces acting on the grid will be transferred to those folds which, if the worst case is reached, can explode, thereby ruining the filter medium. SUMMARY OF THE INVENTION
    [003] It is an object of the present invention to provide an improved support fabric that reduces or eliminates the aforementioned and other disadvantages. This objective and other objectives are achieved by a support fabric according to the present invention as defined in claim 1 of the appended claims. This objective and other objectives are all achieved by a media packet as defined in claim 10 and a V-type filter as defined in claim 11 of the appended claims. Preferred embodiments of the present invention are defined in the dependent claims.
    [004] Thus, in accordance with one aspect of the present invention, a support screen for a media pack is provided, where the support screen has a longitudinal direction arranged to extend along and the depth length of the media pack. , that is, in the air flow direction, and a lateral direction, that is, a direction substantially perpendicular to the longitudinal direction, arranged to extend over a width of the medium pack. The support web comprises a plurality of longitudinal bundles which have first and second ends and are arranged to be mounted on the media pack in the longitudinal direction. The support screen further comprises at least one fin which is attached to the longitudinal bundles and arranged to extend in the lateral direction of the media pack and adapted to direct a flow of air passing through the support screen in a preferred direction. Providing a fin not only increases the rigidity of the system, it also provides better guidance of the air flow passing through the filter and support screen compared to prior art solutions. This increases the airflow properties of a filter. Additionally, by using a support web according to the invention, the deformation of the media package is reduced due to the additional stiffness of the support web compared to prior art solutions. This allows the use of filter media packs having a greater length in depth, which is the length of the media pack in the air flow direction, which reduces the pressure drop across the filter at a given flow rate. Additionally, this rigidity allows the use of media packs having a reduced thickness. This reduces the amount of dead area, that is, areas where airflow cannot pass. In any case, by using a support fabric in accordance with the present invention, filter arrangements can be obtained with improved filtering characteristics, reduced pressure drop and increased service life expectancy.
    [005] According to an embodiment of the invention, the fin is provided in the form of fin elements arranged in spaces between adjacent longitudinal beams.
    [006] According to an embodiment of the invention, a plurality of lateral extension fins is provided.
    [007] According to an embodiment of the invention, the dimensions of the separate fins differ. By using fins having different sizes at different locations on the support screen, properties can be optimized. For example, fins near a central portion of the support screen may have larger dimensions than fins located near a downstream edge. Near a downstream edge of the support screen, a fin having relatively large dimensions may nevertheless be used in order to function as a touch protection, that is, to provide protection for the filter media package against intrusion from, for example, a user's fingers or hands. This is advantageous as it often occurs that a user, when, for example, assembling a filter frame assembly or assembling a filter frame assembly to a filter bank grid or the like, accidentally push their fingers through the media pack. of filter, possibly spoiling the same. A fin having a relatively large cord length prevents this and additionally also directs an airflow in a suitable direction.
    [008] According to an embodiment of the invention, the fin has a flat shape. A flap near an upstream edge of the support screen may, for example, have a flat shape, acting as an airflow guide and as protection against touch.
    [009] According to an embodiment of the invention, the fin has a curved shape. An air flow entering a V-type filter frame assembly comprising a applied filter media will pass through the filter media itself in a direction more or less perpendicular to the main surface of the filter media package. As air then exits the filter media package, it changes its flow direction into the general flow direction. A curved fin can be made with an upstream starting point, ie, closer to the filter media packet, having a relatively steep angle, ie, perpendicular to, or at least close to, the filter media packet. Immediately thereafter, the fin curvature may turn in the direction of the preferred flow direction. The curvature ensures that airflow can be redirected without unnecessary pressure drop.
    [010] According to an embodiment of the invention, no fin point has a height greater than the height of the beam at the same depth position. By preventing the fins from adding overall weight to the support fabric in addition to the longitudinal beams, the combined thickness of the filter media package and support fabric can be reduced, thus reducing overall dimensions.
    [011] According to an embodiment of the invention, the fin has a curved shape so that the angle between the normal plane to a main plane of the supporting screen and an imaginary straight line between the start point of the fin and any point on the fin is less than or equal to the angle between the normal plane of the main plane of the supporting screen and an imaginary straight line connecting the start point and end point of the fin. The start point being the end point upstream of the fin and the end point being the end point downstream of the fin.
    [012] According to an embodiment of the invention, an angle ç between the normal plane of the main plane of the support fabric and an imaginary straight line connecting the start point and the end point of the fin is between 0° and 90°.
    [013] According to an embodiment of the invention, at least a partial surface of the fin has a surface roughness/roughness that retards the flow separation of an air flow passing through the support screen. Separation of flow from air flow is highly undesirable as it significantly increases the pressure drop. By providing at least parts of the fin with a surface roughness adapted to induce turbulent flow in the boundary layer, the risk of flow separation can be greatly reduced. This is because turbulent flow has much less tendency to separate compared to laminar flow. This can be achieved by providing dimples (golf balls) on the surface of the top, that is, the downstream surface, of the fin. Obviously, other parts of the support fabric such as longitudinal beams can also be provided with such surface roughness. Instead of depressions such as dimples, bumps are also conceivable.
    [014] According to another aspect of the invention, a media package for a V-type filter is provided, where the media package has an upstream surface and a downstream surface and where a support screen according to either of claims 1 to 10 is provided on the downstream surface of the media pack.
    [015] According to another aspect of the invention, a V-type filter comprising a plurality of media packets according to claim 10 arranged in a V-shape is provided, wherein the V-type filter comprises a frame structure and where the media pack is attached to said frame structure.
    [016] According to an embodiment of the invention, an angle ç between the normal plane of the main plane of the supporting screen and an imaginary straight line connecting the start point and the end point of the fin is α < ç < 90, where α is half of the V-shape opening angle and α < 45.
    [017] According to an embodiment of the invention, an angle ç between the normal plane of the main plane of the supporting screen and an imaginary straight line connecting the start point and the end point of the fin is 2*α <ç < 90, where α is half the V-shape opening angle and α < 45.
    [018] According to an embodiment of the invention, an angle ç between the normal plane of the main plane of the supporting screen and an imaginary straight line connecting the start point and the end point of the fin is 3*α <ç < 90, where α is half the V-shape opening angle and α < 30.
    [019] According to an embodiment of the invention, an angle ç between the normal plane of the main plane of the supporting screen and an imaginary straight line connecting the start point and the end point of the fin is α < 90 - α, where α is half the opening angle of the V shape and where α < 45.
    [020] According to an embodiment of the invention, the dimensions and shapes of the support web are chosen so that the support web does not form a restriction on the flow of air through the filter in addition to the filter medium. BRIEF DESCRIPTION OF THE DRAWINGS
    [021] The invention will now be described in greater detail and with reference to the attached drawings in which:
    [022] Figure 1 is a schematic exploded perspective view of an embodiment of a V-type filter of the invention.
    [023] Figure 2 is a schematic perspective view of an embodiment of a V-type filter of the invention.
    [024] Figure 3 is a perspective view of an embodiment of the support fabric according to the invention.
    [025] Figure 4 is a schematic side view of an embodiment of the support fabric according to the invention.
    [026] Figure 5 is a schematic explanatory view of the invention.
    [027] Figure 6 is a schematic perspective view of an embodiment of the invention.
    [028] Figure 7 is a schematic cross-sectional view of a detail of a V-type filter according to the invention. DESCRIPTION OF PREFERRED MODALITIES
    [029] The present invention relates to a support screen in filter assemblies for removing particles from an air flow, and more particularly, to a support screen structure for a filter medium applied in a V arrangement. as illustrated in Figure 1. An exploded view of one embodiment of a filter assembly 100 of the present invention is illustrated. Filter assembly 100 includes a frame structure having six media packets 30 disposed therein. The media packs 30 comprise a rectangular plywood media, having first and second opposite side edges, and opposite front and rear edges. The media pack is manufactured from a sheet of filter media, made, for example, from a sheet of fiberglass, or a sheet of non-woven polyester, which is applied to increase the effective filtering area of the body. filter. Filter assembly 100 is a frame structure comprising a plurality of frame elements: side panels 40, a top panel 50, and three lower panels 60. Media packs 30 are stacked in a repeating V frame within the frame structure. frame, having its opposite side edges disposed facing a respective side panel 40, while at least one of the front and rear ends of each adjacent media pack 30 bears against a front and rear front end of each adjacent media pack 30 to form the V-frame. The opposite front and rear ends of the media pack 30 are disposed facing the top panel 50 and one of the bottom panels 60, respectively. Additionally, when the filter assembly 100 is assembled, the side edges and the front and rear ends of the media pack 30 are sealed against the frame elements 40, 50, 60 of the frame structure, so that substantially all of the air flows into the frame. passes through the filter assembly, passes through the media pack 30. Typically, air enters the filter assembly 100 through the upper panel 50 in a direction perpendicular thereto and exits the filter assembly 100 at the lower panels 60 in the same direction as so that the general air flow direction is a direction perpendicular to a major plane of the top panel 50.
    [030] In a first modality of a support fabric according to the invention, as best illustrated in figures 3, 4, and 6, the support fabric 10 comprises a number of longitudinal beams 11 and fins 12. In contrast to the Prior art support screens, longitudinal beams 11 according to the present invention have a height that varies across their length and fins 12 are provided to guide air having passed through the filter medium in a preferred direction while providing a resistance additional to the screen. Additionally, the outermost longitudinal bundles each have a lateral rib projecting outwardly. This side rib is provided with dovetail shaped partitions in order to enhance an adhesive bond between the support web 10 and the filter frame structure. In this way, a support screen 10 is obtained and has a high degree of rigidity, especially against deformation. A support screen of this type may have to withstand pressures of around 6000 to 6500 Pa, which for a screen being 550*600 mm will be equivalent to a load of up to 210 kg. Therefore, in order to prevent the adjacent filter media packages 30 from deforming and getting too close together so that the air flow is impeded or even broken, the support web 10 needs to be as rigid as possible. But at the same time, the combined thickness of the media pack 30 and support web 10 at the front and rear edges, that is, where the adjacent media pack 30 and support webs 10 come into contact with each other and top and bottom panels 50, 60, respectively, should be kept as low as possible. This is since the area of the lower panels 60 and the corresponding parts of the upper panel 50 can be considered dead areas, or restricted when it comes to airflow characteristics. In order to reduce the pressure drop across the filter assembly, there are areas to minimize. Therefore, the reduced height at the ends of the longitudinal beams 10 of the present invention is very favorable in this regard. Further details of the bundles can be found in PCT/EP2012/068707 where priority is sought for this order. Fins 12 of the present invention are disposed in the spaces between adjacent longitudinal beams and do not add overall weight to the support web in addition to the longitudinal beams. This is best illustrated in Figure 4 where it is indicated how the fins 12 are arranged in the space between two adjacent longitudinal bundles 11 while adding nothing to the overall height of the supporting screen 10. Figure 4 also illustrates the curvature of the fins 12, the importance of which will be discussed now. An air flow entering a filter frame assembly enters and leaves the filter assembly in a direction generally perpendicular to the main plane of the top panel 50. The air flow will, however, pass through the filter medium itself. in a direction roughly perpendicular to the main surface of the filter media package, thus needing to change direction when doing so. As the air then exits the filter media package, it again changes its flow direction, this time back to the general flow direction. A curved fin can therefore be created with an upstream starting point, ie closer to the filter media packet, having a relatively steep angle, ie perpendicular to the filter media packet and thus more or less equal to the air leaving the filter medium, or at least close to it. Immediately afterwards, the curvature of the fin can turn the air flow in the preferred flow direction. Such curvature ensures that airflow can be redirected without unnecessary pressure drop. Such fin 12 can be seen in Figure 4 where it starts in an upstream position, near a lower edge 19 of the support web 10 intended to support against a downstream surface of a filter media package 30. It starts in a substantially direction. perpendicular to a main surface of the support web 30, and thus to a main surface of the media pack 30, and thereafter smoothly turns towards a direction substantially parallel to the general airflow direction when it reaches the upper edge 21 of support fabric 10. In a preferred embodiment, a tangent of a downstream end of fin 12 is in the plane of the general air flow direction. The smooth transition in the fin direction ensures a change in airflow direction without any, or very small, additional pressure drop. Figure 5 illustrates in an explanatory and simplified way the shape of the curved fin 12. Here, an angle α is illustrated, which is half the opening angle between two adjacent V-structures; and ç which is the angle between the normal plane of the main plane of the supporting web, and thus to the main plane of the half pack 30, and an imaginary straight line connecting the start point and end point of the fin 12. A In order for air to leave the filter assembly without an undue pressure drop, ç must correspond to 0 <ç < 90, where ç is positive in the downstream direction. A preferred curvature of the fin 12 can be described by mentioning that the fin 12 has a curved shape so that the angle between the normal plane to a main plane of the support fabric 10 and a line between the fin start point and any point on the line. is less than or equal to the angle between the normal plane of the main plane of the support screen 10 and an imaginary straight line connecting the start point and end point of the fin
    [031] The side view of the longitudinal beam 11 is also illustrated in Figure 4. Here, it can be seen that the longitudinal beam 11 has an arc-shaped upper side that provides the longitudinal beam 11 with favorable characteristics, that is, greater rigidity of flexion while still contributing to a low overall thickness at the front and rear edges of the media pack 30. The arc-shaped upper side of the longitudinal bundle 10 suddenly ends near the front and rear edges of the support web 10, thus creating a support surface 14. This support surface 14 provides the additional structural rigidity of the support web 10 when inserted into the top and bottom panels 50, 60, respectively. The top and bottom panels 50, 60 typically comprise a recess or the like into which the media pack 30 together with the support web 10 is inserted. This recess is subsequently filled with an adhesive in order to create a strong, airtight bond between the separate elements. The bearing surface 14 will then rest on a corresponding surface of the top or bottom panel 50, 60, thus improving the rigidity of the system. Obviously, adhesive can be provided in the recess prior to insertion of the media pack 30 with the support web 10 as well. Obviously, other longitudinal beam shapes 11 are also conceivable, for example a stepped increase in height or a linear increase in height.
    [032] Along the front and rear edges of the support screen 10, downward protruding tabs 13 are provided. They have substantially two functions. First, they allow the support web 10 to be temporarily attached to a corresponding media pack 30. The tabs 13 will grip around the edges of the media pack 30 so that the media pack 30 and support web 10 can be attached. together with the filter frame set in a subsequent step. Second, the tongues 13 allow the support webs 10 to be stacked and held in place one on top of the other which is advantageous during transport and stock keeping.
    [033] Figure 7 illustrates a cross section of a filter assembly as illustrated in Figure 1 where two media packs 30 are arranged in a frame element, here a side panel 40. The filter media as before emerges in a pot 45 in a first molding step, provided with a support web 10. The support web 10 and the media pack 30 are temporarily held together by means of tongues 13, not illustrated here. The support fabric 10 and the media pack 30 are created together in a first layer of molding compound 47, and subsequently fixed and sealed within the pot 45. The ribs that extend along the side edges of the support fabric 10 are thus sealed in the pot 45 together with the media pack 30 in this first molding step.
    [034] The provision of the pot 45 further increases the structural rigidity of the media pack 30 and the support screen 10 which facilitates the insertion of the media packs created in this way into the filter frame assembly, i.e. side panel 40, top panel 50, and bottom panel 60. In a second molding step, the media pack 30, support screen 10 and pot 45 are inserted together and secured to the filter frame assembly comprising the top panel 50 and panels sides 40. When media pack 30, support screen 10 and pot 45 have been inserted, lower panels 60 are secured to side panels 40. Preferably, the molding compound used in first step 47 and/or second step 46 of molding is selected from a suitable one- or multi-component material that can be dispensed as a liquid and subsequently hardened, i.e., cured, as a material chosen from a group consisting of poly plastisols. vinylchloride, polyurethanes, epoxies, silicones and ceramics. Further details regarding the disposition of pot 45 can be found in PCT/EP2012/067746 where priority is sought for this order.
    [035] Finally, it is noticed that the support screen using the longitudinal beams having a variable height over their length and fins for airflow direction uses the advantages of having both a thin support screen at the edges for reduction from pressure losses across the filter due to dead areas and a stiffer support screen towards a center to reduce strain on the filter medium during use. This allows the use of filter media packets having a greater depth length than prior art solutions. Instead of using filters of, for example, 300 mm or 450 mm in length, it is now possible to use filters having a length in depth of 600 mm. This greatly reduces the pressure drop across the filter at a given flow rate. By using a support screen in accordance with the present invention, it may even be possible to replace the two sets of filter frame coupled in series with a single set, which implies shorter maintenance times and thus costs reduced. The screen and other filter frame details can be manufactured from various materials such as plastic or metal. Preferably, all parts of the filter frame assembly can be made of ABS, except for the support screen which can be made of reinforced ABS (fiberglass). Other materials are also conceivable, such as polystyrene, polypropylene, etc. Additionally, it is obvious that the fins do not necessarily need to be curved. They can be simply flat and still achieve the advantages mentioned here, that is, the airflow direction and the improved screen stiffness. It is not necessary that all longitudinal beams have a variable height along their length. For example, the two outermost longitudinal beams may comprise a substantially flat rib extending along the side edge of the filter medium. The outermost beams are typically not subjected to the same forces as the beams towards the center of the supporting screen and therefore do not need to be as rigid as the beams. Since the support web is fixed to the filter frame structure along the side edges, forces are to some extent carried by the filter frame. The flat rib can also be provided with the dovetail shaped partitions mentioned above. Additionally, the V-type filter of the present invention may, in use, be located with a main plane of the side plates disposed in any plane, such as a horizontal plane, or a vertical plane so that the bottom of the V-shape can be aligned. in any preferred direction.
    权利要求:
    Claims (14)
    [0001]
    1. Support screen (10) configured to be disposed on a downstream surface of a filter media package (30) of a V-type filter, wherein the support screen (10) has a longitudinal direction extending to the along a length in depth of the filter media packet (30) of the V-type filter and a lateral direction extending along a width of the filter media packet (30) of the V-type filter, the support web (10) CHARACTERIZED by comprising: a plurality of longitudinal beams (11) each having first and second ends and being configured to be mounted to the filter media package of the V-type filter in the longitudinal direction extending along the length in depth of the filter media packet of the V-type filter, and each having a height varying over the length of the beam with a reduced height at at least one end of the longitudinal beam; said support web (10) further comprising a plurality of fins (12), wherein each fin (12) is fixed to adjacent longitudinal bundles (11) and is disposed in a space between the adjacent longitudinal bundles (11) to be arranged. extend in the lateral direction extending across the width of the filter media package of the V-type filter, wherein the fins (12) are configured to direct an air flow passing through the support screen (10) in a particular direction. , and where an angle Φ between the normal plane of the main plane of the supporting screen (10) and an imaginary straight line connecting the start point and end point of each fin (12) is between 0° and 90°.
    [0002]
    2. Support screen (10), according to claim 1, CHARACTERIZED by the fact that separate fins of the plurality of laterally extending fins have different dimensions.
    [0003]
    3. Support screen (10), according to claim 1, CHARACTERIZED in that the fin (12) has a flat shape.
    [0004]
    4. Support screen (10), according to claim 1, CHARACTERIZED in that the fin (12) has a curved shape.
    [0005]
    5. Support screen (10) according to claim 1, CHARACTERIZED in that no point of the fin (12) has a height greater than a height of each longitudinal beam of the plurality of longitudinal beams (11) in a common position at depth.
    [0006]
    6. Support fabric (10) according to claim 1, CHARACTERIZED in that the fin (12) has a curved shape so that an angle between a normal plane to a main plane of the support fabric (10) and a line between a starting point on the at least one fin and any point on the at least one fin (12) being less than or equal to an angle between the normal plane of the main plane of the supporting screen (10) and an imaginary straight line connecting the point starting point of the at least one fin and an end point of the at least one fin (12).
    [0007]
    7. Support screen (10), according to claim 1, CHARACTERIZED by the fact that at least a partial surface of the fin (12) has a surface roughness that retards the separation of flow from the air flow passing through the screen. support (10).
    [0008]
    8. Filter media package for a V-type filter, CHARACTERIZED in that the media package has an upstream surface and a downstream surface, wherein a supporting screen (10) as defined in claim 1 is provided on the surface downstream of the filter media package.
    [0009]
    9. V-type filter, CHARACTERIZED in that it comprises a plurality of filter media packets as defined in claim 8, arranged in a V-shape, wherein the V-type filter comprises a frame structure (100) and in that the filter media packet is attached to said frame structure (100).
    [0010]
    10. V-type filter, according to claim 9, CHARACTERIZED by the fact of an angle Φ between the normal plane of the main plane of the support screen (10) and an imaginary straight line connecting the start point and the end point of the fin (12) be α <Φ < 90°, where α is half the opening angle of the V-shape and α < 90°.
    [0011]
    11. V-type filter, according to claim 9, CHARACTERIZED by the fact of an angle Φ between the normal plane of the main plane of the support screen (10) and an imaginary straight line connecting the start point and the end point of the fin (12) be 2*α <Φ < 90°, where α is half the opening angle of the V-shape and α < 45°.
    [0012]
    12. V-type filter, according to claim 9, CHARACTERIZED by the fact of an angle Φ between the normal plane of the main plane of the support screen (10) and an imaginary straight line connecting the start point and the end point of the fin (12) be 3*α <Φ < 90°, where α is half the opening angle of the V-shape and α < 30°.
    [0013]
    13. V-type filter, according to claim 9, CHARACTERIZED by the fact of an angle Φ between the normal plane of the main plane of the support screen (10) and an imaginary straight line connecting the start point and the end point of the fin (12) be α <Φ < 90° - α, where α is half the opening angle of the V-shape and α < 45°.
    [0014]
    14. V-type filter according to claim 9, CHARACTERIZED by the fact that the dimensions and formats of the support screen (10) are chosen so that the support screen (10) does not form an airflow restriction through of the filter in addition to the filter medium.
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    同族专利:
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    法律状态:
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-08-27| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-11| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-02-17| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-06-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-07-06| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EPPCT/EP2012/067746|2012-09-12|
    PCT/EP2012/067746|WO2014040615A1|2012-09-12|2012-09-12|Filter assembly and filter assembly manufacturing method|
    PCT/EP2012/068707|WO2014044324A1|2012-09-21|2012-09-21|Backing net structure|
    EPPCT/EP2012/068707|2012-09-21|
    PCT/EP2012/074546|WO2014040658A1|2012-09-12|2012-12-05|Backing net structure|
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