• 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:
    FLUID FILTER IN THE TANK FOR A PUMP OF THE TYPE WITH AN INLET FITTING AND A RETENTION POST. The present invention relates to a fluid filter in the tank (10,110) that has a filter body (12,112) made of porous material and a plastic outlet (14,114,214,514) fixed to the filter body (12,112) to connect the filter (12,112) to a pump (46). A plastic retainer (16,116,216,316,416,516) is integrally formed in the outlet hole (14,114,214,514), the retainer (16,116,216, 316,416,516) comprising a flap (18,118,218,318,418,518) that extends in a plane perpendicular to the flow axis (Z), 18,118,118,118 ) having a first surface (20,120,220,520) close to the pump (46) and a second remote surface (22,122,222,522) from the pump (46), the flap (18,118,218, 318,418,518) having an opening (24,124,224,324,424,524) extending from the first surface (20,120,220,520) to the second surface (22,122,222,522) with an effective cross section (C, C?) on the first surface (20,120,220,520) which is larger than the post cross section (540,542) and which is reduced towards the second surface (22,122,222,522) for an effective cross section (c, c?) That is smaller than the post cross section (540,542).
    公开号:BR112013025235B1
    申请号:R112013025235-9
    申请日:2012-03-01
    公开日:2021-03-02
    发明作者:Travis Schnipke；Michael E. Yost；Gary L. Rickle；Joseph Wendahl
    申请人:Kuss Filtration Inc；
    IPC主号:
    专利说明:

    CROSS REFERENCE TO RELATED REQUESTS
    [001] This application claims the benefit of the US provisional application entitled "IN-TANK FUEL FILTER WITH PLASTIC RETENTION FEATURE", application number 61 / 468,673, filed on March 29, 2011, all of which is incorporated by reference. TECHNICAL FIELD OF THE INVENTION
    [002] The present invention relates in general to the fluid filters in the tank for installation in the sets of pumps in the tank for fluid systems, for example, fuel supply systems, brake systems, emission systems, steering systems , transmission systems, windshield wiper systems, cooling systems, lubrication systems, or other fluid systems, and more specifically to a fluid filter in the tank having a retainer that grips a retaining post on a pump to hold the pump filter. BACKGROUND OF THE INVENTION
    [003] The fluid filters in the current tank may incorporate a metal retaining ring, which is pressed into a plastic outlet port on the filter. The metal ring includes a plurality of metal barbs that serve to connect and grip a retaining post on a pump in the tank. An example of such a metal retaining ring is described for a tank fuel filter in US Patent 5,665,229. The metal retaining ring increases manufacturing costs, requiring additional human and material work. SUMMARY OF THE INVENTION
    [004] The present invention eliminates the additional costs of a metal retaining ring by providing a plastic retainer integrated in a plastic orifice that is attached to the filter to connect the filter to a pump inlet. A fluid filter in the tank has a filter body made of porous material with an attached plastic outlet port for connecting the filter to a pump inlet fitting. The outlet port has a flow axis defined by a desired direction of fluid flow from the filter to the pump. A plastic retainer is formed in the outlet port with a flap that extends in a plane perpendicular to the flow axis and an opening through the flap to receive the pump retaining post. The opening is larger near the flap surface that is close to the pump than on the remote surface of the pump. The opening has an effective cross-section that varies and is defined as the largest cross-section mathematically similar to the retaining post, which can be designed inside the opening without any intersection of the plastic material of the flap. The effective cross section corresponds to a cross section of the post that can be inserted in a given position, without deforming the retainer. Thus, the opening can be sized to have an effective cross-section on the surface near the pump that is larger than the cross-section of the pole.
    [005] In one aspect of the invention, the effective cross section can be reduced continuously towards the surface in front of the pump so that the effective cross section becomes smaller than the cross section of the pole. When the pump retaining post is inserted into the opening, the plastic material is deformed, where the effective cross section is less than the post cross section. This gives the retainer a firm grip on the retaining post without establishing a positive lock.
    [006] The resulting deformation can be at least partially elastic. The plastic retainer will serve to firmly grasp and hold the outlet port of the plastic filter to the pump retaining post without the need for a change in the design of existing pump designs.
    [007] To facilitate assembly, the opening may have, for example, the tapered, conical or chamfered centering guide on the surface from which the retaining post is inserted into the opening.
    [008] Within the opening, a plurality of active tabs can be arranged to reduce the effective cross section of the opening. The tongues can be reduced to perform different effective cross sections in different axial positions.
    [009] The tongues can each have a contour that, without deformation of the tongues, makes a point-shaped contact with the retaining post. The three or more tabs remove all lateral degrees of freedom to secure the retaining post to the retainer. These tongues may, for example, be in the form of partial cones, including partial truncated cones.
    [0010] Alternatively, the tongues may have a contour that is adapted to the retaining post and thus comes into contact with the retaining post over a wider angle range. So, two tabs are sufficient to remove the lateral degrees of freedom.
    [0011] In one embodiment, the plastic retainer is formed unitarily with the outlet port of the filter. The plastic retainer can be made of any non-metallic material, for example, a thermoplastic material. The material is preferably resistant to the fluid to be filtered. For example, in a fuel filter, the material is preferably fuel resistant and dimensionally stable in fuel. If a different fluid is used, the material is preferably resistant to the respective fluid and maintains its shape in the respective fluid. An example of a suitable plastic material for a fuel filter retainer includes, but is not limited to, polyoxymethylene (POM). To increase the stiffness of the retainer, additives such as glass fibers and / or glass beads can be added to the plastic material. BRIEF DESCRIPTION OF THE DRAWINGS
    [0012] In the drawings,
    [0013] Figure 1 schematically illustrates a connection between a pump in the tank and a fluid filter in the tank through a retainer according to the present invention;
    [0014] Figure 2 is a partial cross-sectional view of a first illustrative embodiment of a fluid filter in the tank with a plastic retainer formed in the outlet port of the plastic filter of the fluid filter in the tank;
    [0015] Figure 3 shows a detailed view of the plastic retainer shown in figure 2 seen from the side of the fluid pump;
    [0016] Figure 4 shows a detailed view of the plastic retainer shown in figure 2 seen from the side of the filter body;
    [0017] Figure 5 illustrates a second embodiment of a plastic retainer integrally formed in the outlet port of the plastic filter of the fluid filter in the tank seen from the side of the fluid pump;
    [0018] Figure 6 shows the mode of figure 5 seen from the side of the filter body;
    [0019] Figure 7 shows schematically an illustrative example of an alternative arrangement of the tongues;
    [0020] Figure 8 shows schematically an illustrative example of an alternative arrangement of the tongues.
    [0021] Figure 9 illustrates a modality of a plastic retainer integrally formed in the outlet port of the plastic filter of the fluid filter in the tank configured for a retaining post seen from the side of the fluid pump;
    [0022] Figure 10 illustrates effective cross-sections of the modality of figures 9 and 10 for a rectangular pole; and
    [0023] Figure 11 illustrates the effective cross sections of the modality of figures 9 and 10, for an oval pole. DETAILED DESCRIPTION OF THE DRAWINGS
    [0024] All figures are for illustrative purposes only and are not intended to limit the scope of the present invention. The drawings may not be at full scale and serve to underline certain details of the various aspects of the invention.
    [0025] Figure 1 shows a schematic view of a fluid pump assembly 44 with a fluid filter 10 attached. The fluid pump assembly 44 includes a fluid pump housing 46, a cylindrical inlet fitting 48, and a retaining post 50. The cylindrical inlet fitting 48 extends from the pump housing 46 to the filter 10 and defines a central flow axis Z indicating a general direction along which the fluid flows from the filter 10 through the inlet fitting 48 into the pump housing 46. In the following, the term "axial" indicates the direction of the flow axis.
    [0026] In the example shown, the retaining post 50 is cylindrical and is attached to the bottom of the pump housing 46. The retaining post 50 extends parallel to the axis of flow Z, spaced radially from the inlet fitting 48 .
    [0027] The filter 10 has a filter body 12, an outlet orifice 14 connected to the filter body12, and a retainer 16 unitarily formed in the outlet orifice 14. The filter body is made of a woven envelope or not porous braid filled with a suitable filter medium to filter the fluid. The outlet port 14 has a size and shape adapted to complement the inlet fitting 48 of the pump assembly 44. Normally, the inlet fitting 48 is cylindrical, but any other cross section can be accommodated in a corresponding mold for the inlet fitting. exit 14.
    [0028] The retainer 16 is in the form of a flap 18 substantially extending radially from the outlet orifice 14. The flap 18 has two main surfaces 20 and 22 that extend perpendicularly to the axis of flow Z. A surface 20 lies facing the pump assembly 44, and the other surface 22 faces the filter body 12, that is, which faces away from the pump assembly 44. The flap 18 has an opening 24 from the surface 20 to the surface 22 located at such a distance from the outlet orifice 14 that coincides with the radial location of the retaining post 50, when the inlet fitting 48 of the pump assembly 44 is inserted in the outlet orifice 14 of the filter 10. The figure 1 schematically indicates that opening 24 has a larger cross section near the first surface 20 than near the second surface 22. Further details in relation to the outlet orifice 14 and the retainer 16, especially in relation to the opening 26, become evident. subsequent description of the individual exemplary modalities.
    [0029] Figure 2 illustrates a cross-sectional view of a first exemplary embodiment of a filter 110. A filter body 12 of a filter 110 is represented by a filter envelope 113 made of a suitable porous fabric material. The filter material disposed within the filter envelope 113 is not shown for simplicity of design. The filter envelope 112 has a circular outlet opening 126, which establishes a fluid connection between the interior of the filter envelope 13 and the interior of an outlet port 114 connected to a filter body 113.
    [0030] The cross-sectional view of figure 2 shows how the outlet port 114 is connected to the filter envelope 113. The outlet port 114 has a cylindrical tubular part 126 with a central flow axis Z and adapted to be connected to a pump inlet fitting, as shown in figure 1. At one end of the tubular section, an outer ring collar 130 and an inner ring collar 132 form a double flange lining the periphery of outlet opening 126 in and out of the filter envelope 113. Therefore, the edge of the outlet opening 126 is secured between the outer collar 130 and the inner collar 132. The outer and inner collars 130 and 132 can be individually shaped or assembled from two parts. They can be attached to the filter envelope 113 by various suitable processes, including, but not limited to, injection molding, heat, mechanical fasteners, and fluid resistant adhesive.
    [0031] Attached to the tubular part is a retainer 116 with a guide 118. The flap 118 protrudes radially from the tubular part 128 and is uniquely molded with the tubular part 128 and the inner and outer rings 130 and 132. The flap 118 has an opening 124 that extends on a first main surface 120 facing out of the filter envelope 113 to a second main surface 122 facing the filter envelope 113. The described opening is adapted for a cylindrical retaining post. Figures 9 to 11 show some examples where the retaining post has a different shape.
    [0032] Viewed in a direction parallel to the Z flow axis, aperture 124 has an outer circular perimeter with several tongues 134 extending radially inward from the circular perimeter of aperture 124.
    [0033] Figures 3 and 4 show partial views of the exit orifice114 of figure 2 to provide more details about opening 124. Figure 3 shows a part of an exit orifice 14, seen from the top of figure 2, that after installation is the location of a fluid pump, as shown in figure 1. The opening 124 of the example shown has eight tongues 134 extending radially inward from the basically circular outer perimeter. Each of the tongues 134 is in the form of a partial cone, truncated with a virtual apex of each cone located outside the flap 118 on the side of the first main surface 120 of the flap 118. The protruding tongues 134 effectively reduce the unobstructed cross section of the opening 124. A circle tangentially touched by the tongues 134 on the first main surface 120 is indicated by a dashed line. The circle has an effective diameter D defining an effective cross section on the first main surface 120, which corresponds to a cross section of the retaining post that can be inserted into the opening 124 on the first main surface 120, without deforming the tongues 134, or that is, the cross section of the largest unobstructed circle on the first main surface. For retaining posts in a different way, the effective cross-section has a mathematically similar shape to the cross-section of the retaining post, which means that the effective cross-section and the cross-section of the post may have a different scale, but with proportions identical. This relationship will be explained in more detail, in connection with figures 10a to 10c and 11a to 11c.
    [0034] In figure 4, a circle tangentially touched by the tongues 134 on the second main surface 120 is indicated by a dashed line. As is evident from Figure 4, the corresponding effective diameter d on the second main surface is smaller than the effective diameter D on the first main surface. This reduction in effective diameter D to d is the result of the conical expansion of the tongues 134 from the first main surface 120 to the second main surface 122. The tongues 134 are dimensioned to provide an effective diameter D that is greater than the diameter of the post. retention to be inserted into opening 124. The effective diameter d, on the other hand, is less than the diameter of the retaining post. Thus, when the retaining post is inserted into opening 124, the tabs 134 are deformed, starting in an axial position where the diameter of the post is equal to the effective diameter. The deformed tongues 134 adhere to the post securely, without the need to establish a positive lock, especially if the resulting deformation is at least partially elastic.
    [0035] The number and shape of the tabs 134 may vary. As the diameter of the retaining post exceeds the effective diameter d, the clamping and insertion force will also increase. This depends on an individual application to find an ideal retention material and tongue constellation adapted to the specific situation.
    [0036] A material suitable for a plastic used to manufacture the outlet hole 114 formed with the retainer 116 may be a thermoplastic material, which is injection molded in the desired shape. A preferred thermoplastic material suitable for the application is polyoxymethylene (POM). Glass fibers or glass beads can be added to the material for structural reinforcement.
    [0037] When deviating from the modality shown in figures 2 to 4, it is not necessary for the tongues 134 to extend across the entire flap 118. Without affecting the functioning of the retainer, the opening 124 may have straight parts or sections of different diameters effective on both axial sides of the latches 134 which are wider than the diameter of the assigned retaining post.
    [0038] Figures 5 and 6 provide partial views of a second illustrative embodiment of a plastic retainer 216 having a flap 218 formed integrally with a plastic outlet hole 214 of a filter in the tank. The flap 218 includes an axial opening 224 with six tabs 234 arranged on the outer perimeter to achieve adequate adhesion to the pump holding post. In the illustrated embodiment, the tongues 234 are in the form of wedge-shaped trapezoidal projections. Because this modality is adapted for a cylindrical retaining post, the effective cross section can be defined by the effective diameter.
    [0039] Notably, the tabs 234 do not extend over the entire axial thickness of the flap 218. Starting at the first main surface 220, opening 224 has a conical or funnel-shaped centering guide 236, with a circular cross section . Since the tabs are located at a distance from the first main surface 220, the effective diameter D on the first main surface 220 is the diameter of the centering guide 236 at that location. The effective diameter decreases as the centering guide 236 narrows to the second main surface 222. Centering guide 236, however, is not configured to grip the retaining post, so that in all axial locations of the centering guide centering 236, the effective diameter of the opening is greater than the diameter of the retaining post. Adjacent to the centering guide 236, between the centering guide 236 and the second surface, the tabs 234 further reduce the effective diameter to an effective diameter resulting from d, due to their wedge shape creating a radially inward inclination towards the second main surface 222.
    [0040] As is evident from figure 6, the tabs 234 create the effective diameter d near the second surface 222 which is less than the effective diameter D on the first main surface 220. As mentioned above, the narrowest effective diameter d it does not have to match the second main surface 222. Advantageously, it is located at a distance from the first main surface, such that the effective diameter D on the first main surface is greater than the diameter of the post and continuously or gradually reduced for the smallest effective diameter d.
    [0041] Figures 7 and 8 give alternative examples of openings 324 and 424, with a reduced number of tabs 334 and 434, respectively. The openings 324 and 424 are provided in the retainers 316 and 416 with the flaps 318 and 418 which can replace any of the flaps shown in the previous figures. It should be understood that the variations shown in the figures are not exhaustive and are indicative of the wide variety of design options for the flaps, without departing from the scope of the present invention.
    [0042] On the tab 318 of figure 7, three tabs 334 are distributed around the perimeter of the opening 324. Viewed from an axial direction, each tab 334 has an outline of a partial circle that extends from the perimeter of the opening 324 radially inward.
    [0043] A circle drawn inside the opening 324 tangentially touching the tabs 334 defines the smallest effective diameter d representing the diameter of a post that can be inserted into the opening 324 without deforming the tabs 334. As previously described, the effective diameter d it is chosen to be slightly smaller than the diameter of a retaining post intended to be inserted into opening 324. Due to their circular contour, the tongues 334 have a point-shaped contact with the circle indicating the effective diameter d. Thus, to eliminate all degrees of freedom of lateral movement of a post inserted in opening 324, it is preferable to choose at least three tongues 334, where the tongues 334 have only one point-shaped contact with the effective diameter d. This arrangement will reliably centralize the retaining post within opening 324.
    [0044] On the other hand, the flap 418 of figure 8 has the tabs 434 extending radially into the opening 424, which have a contour adapted to the circumference of the circle having the effective diameter d. Therefore, each of the tabs 434 establishes a line-shaped contact with the circle indicating the effective diameter d. In this example, two tabs 434 are sufficient to reliably center a retaining post, because the retaining post cannot slide in any radial direction, because the shape of the tabs 434 is adapted to the shape of the retaining post and "embraces" the retaining post.
    [0045] The integrated plastic retainer can be used universally in several pump assemblies and allows a high degree of flexibility in design and retention efficiency due to the customized dimensioning of the opening 24, 124, 224, 324, and 424 and the corresponding tabs 134, 234, 334, and 434.
    [0046] The plastic retainer serves to firmly grip and hold the outlet port of the plastic filter to the pump retaining post. The plastic retainer can be made of any non-metallic material, for example, a thermoplastic. For use in a fuel tank, the material is preferably fuel resistant and dimensionally stable in fuel. Other plastics can be used, depending on the particular application (such as brake systems, emission systems, steering systems, transmission systems, windshield wiper systems, cooling systems or other fluid systems). An example of a suitable plastic material for fuel filters includes, but is not limited to, polyoxymethylene (POM). To increase the stiffness of the retainer, additives such as glass fibers or glass beads can be added to the plastic material.
    [0047] Figure 9 shows another illustrative embodiment of a plastic retainer 516 having a flap 518 formed integrally with a plastic outlet hole 514 of a filter in the tank. The flap 218 includes an axial opening 524 with four tabs 534 arranged on the outer perimeter to achieve sufficient grip on the pump holding post. In the illustrated embodiment, the tongues 534 are shaped as partial truncated cones with a virtual apex of each cone located outside the flap 518 on the side of the first main surface 520 of the flap 518. With respect to the Z flow axis, the opening 524 of the present modality is broader in a radial direction than in the tangential direction. This shape preferably accommodates the retaining posts, with a non-circular cross section, such as a rectangular or oval cross section.
    [0048] While the tabs 534 extend along the entire axial thickness of the flap 518, the opening 524 is chamfered in the vicinity of the first main surface 520, thus forming a centering guide 536 to guide a retaining post in the proximity to the first main surface 520. The cross section of the opening 524 decreases continuously from the first main surface 520 to the second main surface 522. Due to the non-cylindrical shape of the retaining post, an effective cross section is preferably defined by a section cross-section having the same shape as the retaining post. Thus, the effective cross section is a cross section that is mathematically similar to the retaining post and only changes its scale based on the largest unobstructed cross section of the same proportions.
    [0049] Figures 10 and 11 illustrate how the effective cross section depends on the cross section of a retaining post with which the retainer is combined.
    [0050] In figures 10a, 10b and 10c, retainer 516 cooperates with a retaining post, with a rectangular cross section 540, as indicated in figure 10b. Because the cross section of the post 540 is rectangular, the effective cross sections C and c indicated with dashed lines in figures 10a and 10c are rectangles with the same proportions as the cross section of the retaining post 540. Figures 10a to 10c are all drawn on the same scale. As is evident from figure 10a, opening 524 has a first effective cross section C close to the first main surface 520 which is larger than the cross section of post 540 shown in figure 10b. The centering guide 536 may or may not be configured to grip the retaining post below the first main surface 520, as the post is inserted into the centering guide. Adjacent to the centering guide 536, between the centering guide 536 and the second surface 522, the effective cross-section is further gradually reduced to a resulting minimum effective cross-section and as shown in figure 10c.
    [0051] As is evident from figure 10c, tabs 534 create the effective cross section c near the second surface 522 which is smaller than the effective cross section C on the first main surface 520. As mentioned above, the effective cross section narrower c does not need to coincide with the second main surface 522. Advantageously, it is located at a distance from the first main surface 520, such that the effective cross section C on the first main surface 520 is larger than the cross section from pole 540 and continuously or gradually reduced to the smallest effective cross section c. The effective cross-section C on the first main surface is greater than the cross-section of post 540, while the smallest effective cross-section c is less than the cross-section of the post.
    [0052] In figures 11a, 11b and 11c, retainer 516 cooperates with a retaining post, with an oval cross section 542, as indicated in figure 11b. Because the cross section of the post 542 is oval, the effective cross sections C and c 'indicated with dashed lines in figures 11a and 11c are rectangles with the same proportions as the cross section of the retaining post 542. Figures 11a to 11c are all drawn on the same scale. As is evident from figure 11a, opening 524 has a first effective cross section C close to the first main surface 520 which is larger than the cross section of post 542 shown in figure 11b. The centering guide 536 may or may not be configured to grip the retaining post below the first main surface 520, as the post is inserted into the centering guide. Adjacent to the centering guide 536, between the centering guide 536 and the second surface 522, the effective cross section is further reduced gradually to a resulting minimum effective cross section c ', as shown in figure 11c.
    [0053] As is evident from figure 11c, the tabs 534 create the effective cross section c 'near the second surface 522 which is smaller than the effective cross section C' on the first main surface 520. The effective cross section C ' on the first main surface it is larger than the cross section of the post 542, while the minimum effective cross section c 'is smaller than the cross section of the post.
    [0054] A wide variety of different shapes of the cross sections are within the scope of the present invention, including the concave post cross sections, such as the star shaped cross sections. Likewise, the openings within the scope of the invention can include even greater variations in relation to the shape of the opening itself, the shapes and number of tabs, inclinations built into the opening, thickness of the flap, and much more.
    [0055] The invention can be incorporated in other ways without departing from the spirit or novelty characteristics of it. The modalities described in this application must be considered in all respects as illustrative and not limiting. In addition, the details described in connection with one modality can be adapted to be implemented in a different modality. The scope of the invention is indicated by the appended claims instead of the previous description; and all changes that are within the meaning and scope of equivalence of the claims are intended to be embraced therein.
    权利要求:
    Claims (17)
    [0001]
    1. Fluid filter in the tank for a pump having an inlet fitting (48) and a retaining post (50) with a cross section of the post (540, 542), the filter (10, 110) comprising: a body of the filter (12, 112) made of porous material; a plastic outlet port (14, 114, 214, 514) attached to the filter body (12, 112) to connect the filter (10, 110) to the inlet fitting (48), the outlet port (14, 114) , 214, 514) having a flow axis (Z) defined by a desired direction of fluid flow from the filter (10, 110) to the pump (46); and which further comprises a plastic retainer (16, 116, 216, 316, 416, 516) formed in a unitary manner in the outlet port (14, 114, 214, 514), the retainer (16, 116, 216, 316, 416, 516) comprising a flap (18,118,218,318, 418,518) extending in a plane perpendicular to the flow axis (Z), the flap (18, 118, 218, 318, 418, 518) having a first surface (20, 120 , 220, 520) facing the pump (46) and a second surface (22, 122, 222, 522) facing away from the pump (46), the flap (18, 118, 218, 318, 418, 518 ) having an opening (24, 124, 224, 324, 424, 524) for receiving the holding post (50), the opening (24, 124, 224, 324, 424, 524) extending from the first surface (20, 120, 220, 520) for the second surface (22, 122, 222, 522), the opening (24, 124, 224, 324, 424, 524) having an effective cross section (C, C ') in first surface (20, 120, 220, 520) which is larger than the post cross section (540, 542) and the opening (22, 124, 224, 324, 424, 524) having an effective cross section (c, c ') that is smaller than the post cross section (540, 542) in at least one radial plane that intersects with the flow axis (Z) between the first (20, 120, 220, 520) and second surfaces (22, 122, 222, 522) including the second surface (22, 122, 222, 522), characterized by the fact that the opening (24, 124, 224, 324, 424, 524) has two or more tabs (134, 234, 334, 434, 534) extending radially inward to reduce the effective cross section (C, C ', c, c'), where each tab ( 134, 234, 334, 434, 534) has a contour that makes a point-shaped contact with the effective cross section (C, C ', c, c') in at least one radial plane of intersection with the flow axis (Z), the tabs (134, 234, 334, 434, 534) extending through the opening (24, 124, 224, 324, 424, 524) to the second surface (22, 122, 222, 522).
    [0002]
    2. Filter according to claim 1, characterized by the fact that the effective cross section (C, C ') is continuously reduced from the first surface (20, 120, 220, 520) to the second surface (22, 122, 222, 522) and reaches a minimum (c, c ') close to the second surface (22, 122, 222, 522).
    [0003]
    3. Filter, according to claim 1, characterized by the fact that the opening (24, 124, 224, 324, 424, 524) has a conical centering guide (236, 536) close to the first surface (20, 120 , 220, 520).
    [0004]
    4. Filter according to claim 1, characterized by the fact that the tongues (134, 234, 334, 434, 534) are conical in order to perform different effective cross sections (C, C ', c, c)' in different planes of intersection with the flow axis (Z).
    [0005]
    5. Filter according to claim 1, characterized by the fact that the tongues (134, 234, 334, 434, 534) are distributed along the periphery of the opening (24, 124, 224, 324, 424, 524) .
    [0006]
    6. Filter, according to claim 1, characterized by the fact that the tongues (134, 234, 334, 434, 534) are partial, truncated cones.
    [0007]
    7. Filter according to claim 1, characterized by the fact that the tongues (134, 234, 334, 434, 534) have an inner contour adapted to the retaining post (50).
    [0008]
    8. Filter according to claim 1, characterized by the fact that the retainer (16, 116, 216, 316, 416, 516) is made of a plastic material with incorporated reinforcement material.
    [0009]
    Filter according to claim 8, characterized in that the reinforcement material comprises at least one element of the group consisting of glass spheres and glass fibers.
    [0010]
    10. Filter according to claim 1, characterized by the fact that the retainer (16, 116, 216, 316, 416, 516) is made of a thermoplastic material, resistant to fluids.
    [0011]
    11. Filter according to claim 10, characterized by the fact that the fluid-resistant thermoplastic material contains polyoxymethylene.
    [0012]
    12. Filter, according to claim 1, characterized by the fact that the retainer (16, 116, 216, 316, 416, 516) obtains a non-positive lock with the retaining post (50) due to deformation of the retainer (16 , 116, 216, 316, 416, 516).
    [0013]
    13. Filter according to claim 12, characterized by the fact that the deformation is at least partially elastic.
    [0014]
    14. Filter according to claim 1, characterized by the fact that the opening (24, 124, 224, 324, 424, 524) has a tapered centering guide (236, 536) close to the first surface (20, 120 , 220, 520) and a plurality of tabs (134, 234, 334, 434, 534) close to the second surface (22, 122, 222, 522), the effective cross section (C, C ') for the centering guide , (236, 536) being larger than the cross section of the pole (540, 542) and decreasing in one direction from the first surface (20, 120, 220, 520) towards the second surface (22, 122, 222 , 522), the effective cross section (C, C ') on the tongues (134, 234, 334, 434, 534) being greater than the cross section on the post (540, 542) next to the centering guide (236, 536 ) and decreasing towards the first surface (20, 120, 220, 520) towards the second surface (22, 122, 222, 522) to become smaller than the remote pole cross section (540, 542) at from the centering guide (236, 536).
    [0015]
    15. Filter, according to claim 1, characterized by the fact that the cross section of the pole (540, 542) is greater in a radial direction than in a perpendicular radial direction of the same and in which the effective cross section (C , C ', c, c') is defined as having proportions mathematically similar to the cross section of the pole (540.5 42).
    [0016]
    16. Filter, according to claim 15, characterized by the fact that the cross section of the pole (540) is rectangular.
    [0017]
    17. Filter according to claim 15, characterized by the fact that the cross section of the pole (540) is oval.
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    同族专利:
    公开号 | 公开日
    WO2012134696A1|2012-10-04|
    BR112013025235A2|2016-12-27|
    US8715497B2|2014-05-06|
    CN103635243B|2016-06-08|
    CN103635243A|2014-03-12|
    US20120248021A1|2012-10-04|
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    法律状态:
    2018-04-03| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-07-23| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-30| B07A| Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]|
    2020-12-22| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-03-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 01/03/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161468673P| true| 2011-03-29|2011-03-29|
    US61/468,673|2011-03-29|
    PCT/US2012/027191|WO2012134696A1|2011-03-29|2012-03-01|In-tank fluid filter with plastic retainer|
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