Integral filter end cap, mold and seal

Abstract

The unitary seal member (300a) includes an at least partially annular body defining a longitudinal axis (216a), a radial direction (218a), and a circumferential direction (217). The at least partially annular body includes a top annular mounting portion (324c), a seal portion (302a) including at least one top sealing feature (343) and at least one bottom sealing feature (336), and a connecting portion (318a) extending at least radially outwardly from the top annular mounting portion (324c) to the seal portion (302a).

Description

Technical Field

[0001] This invention generally relates to a canister-type filter system employing a replaceable filter element having a radially external sealing member (e.g., an O-ring) inserted axially between the base of the filter system and the canister. More specifically, the invention relates to a filter element for use with such a filter system, which replaces this separate seal with a sealing member integral with the filter element. Background Technology

[0002] Liquid filter systems are known to be used to filter various fluids, such as gases, oils, and diesel fuels, to remove contaminants from these fluids. For example, in a diesel engine, a fuel line filter is used to separate water and debris from the fuel. Various seals are provided to prevent leakage. For example, in a canister filter system, there is typically a top seal located between the filter element and the base, a bottom seal (also referred to as a housing) located between the filter element and the canister, and a radially external seal, such as an O-ring, inserted axially between the base and the canister. It has been determined that small leaks can sometimes occur when using such O-rings.

[0003] U.S. Patent No. 9,970,394B2 discloses a positioning structure for radially positioning an axial sealing gasket relative to a mounting flange and a sealing flange of a housing and a base. The gasket can be axially fixed to either the mounting flange or the sealing flange of the housing and base. A wing nut is used to secure the housing to the base and provide the necessary sealing force. However, this sealing gasket may still leak, similar to an O-ring. Summary of the Invention

[0004] A filter element according to an embodiment of the invention includes at least a partially annular configuration and defines a longitudinal axis, a radial direction, and a circumferential direction. The filter element may include an annular filter medium defining a central channel, a central tube disposed in the central channel of the annular filter medium defining a central reservoir, and the annular filter medium surrounding the central tube and the central reservoir. A top open end may be connected to the central tube disposed along the longitudinal axis, the top open end including an opening allowing fluid to flow from the central reservoir to the outside of the filter element. A bottom end (which may be open or closed) may be connected to the central tube opposite to the top open end disposed along the longitudinal axis. An integral sealing member may be attached to the filter element and may include a sealing portion arranged at least radially away from the annular filter medium. The integral sealing member may also include a connecting portion extending at least radially away from the filter element to the sealing portion.

[0005] An integral sealing member according to an embodiment of the present invention may include a body that defines at least a partial annular shape in a longitudinal axis, a radial direction, and a circumferential direction. The at least partially annular body may include: a top annular mounting portion including a top mounting ring having a bottom surface and including a plurality of press-fit nut studs extending axially downward from the bottom surface, the top mounting ring further defining at least a partial central hole; a sealing portion including at least one top sealing feature and at least one bottom sealing feature; and a connecting portion extending at least radially outward from the top annular mounting portion to the sealing portion.

[0006] A filter element according to an embodiment of the invention includes at least a partially annular configuration and defines a longitudinal axis, a radial direction, and a circumferential direction. The filter element may include an annular filter medium defining a central channel, a central tube disposed in the central channel of the annular filter medium defining a central reservoir, and the annular filter medium surrounding the central tube and the central reservoir. A top open end may be connected to the central tube disposed along the longitudinal axis, the top open end including an opening allowing fluid to flow from the central reservoir to the outside of the filter element. A bottom end (which may be open or closed) may be connected to the central tube opposite to the top open end disposed along the longitudinal axis. An integral sealing member may be connected to the filter element and may include a top annular mounting portion including a top mounting ring and a radially inner annular wall defining a central bore. A connection portion including a radially outer skirt may also be provided. The top mounting ring may include a continuous member without any through-holes communicating with the central bore, and the radially inner annular wall may also include a continuous member without any through-holes communicating with the central bore. Furthermore, the radially outer skirt may also include a continuous member without any through-holes, thereby allowing the integral sealing member to function as a mold in some embodiments. Attached Figure Description

[0007] Figure 1 This is a front cross-sectional view of a filter assembly according to an embodiment of the present invention. The filter assembly includes a filter base, a canister, and a filter element, the filter element including an integral sealing member.

[0008] Figure 2 From Figure 2 The rectangle 2-2 cut Figure 2 A magnified detail of the sealing portion of the integrated seal shows the sealing portion forming the top sealing interface with the base and the bottom sealing interface with the cylinder.

[0009] Figure 3 yes Figure 1 A perspective view of the filter elements, including those from... Figure 1 The filter assembly has its integrated sealing component removed.

[0010] Figure 4 yes Figure 3 A front sectional view of the filter element and its integrated sealing component.

[0011] Figure 5 From Figure 3 A perspective view of the integrated sealing component with the filter element removed.

[0012] Figure 6 yes Figure 5 Front sectional view of the integrated sealing component.

[0013] Figure 7 It was cut from rectangle 7-7. Figure 6 Enlarged detail of the peripheral sealing portion of the integrated sealing component.

[0014] Figure 8 It includes and Figures 1 to 12 A flowchart of the associated assembly method.

[0015] Figure 9 This is an enlarged front sectional view of another filter assembly including an integral sealing member, according to another embodiment of the present invention.

[0016] Figure 10 yes Figure 9 A perspective view of the bottom orientation of the integrated sealing component.

[0017] Figure 11 yes Figure 10 A bottom view of the integrated sealing component.

[0018] Figure 12 yes Figure 10 Front sectional view of the integrated sealing component. Detailed Implementation

[0019] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals are used throughout the drawings to denote the same or similar parts. In some cases, reference numerals will be indicated in this specification, and the drawings will show reference numerals followed by letters, such as 100a, 100b, or apostrophes such as 100', 100", etc. It should be understood that the use of letters or apostrophes immediately following reference numerals indicates that these features have similar shapes and similar functions, as is often the case when the geometry is mirrored about a plane of symmetry. For ease of explanation in this specification, letters or apostrophes are generally not included herein but may be shown in the drawings to indicate repetition of features discussed in this written description.

[0020] First, the filter system will now be described to give the reader appropriate context for understanding how to use the various embodiments of the invention. It should be understood that this description is given by way of example and is not intended to be limiting. Any embodiment of the apparatus or method described herein can be used in conjunction with any filter system.

[0021] Next, filter elements that may include an integral sealing member according to various embodiments will be discussed. In some embodiments, the integral sealing member can simplify the assembly of the filter system while providing sealing redundancy to help prevent leakage, and allowing dirty fluid to flow through the orifices of the connection portion of the integral sealing member, so that the dirty fluid can reach the annular filter media for filtration. Furthermore, integral sealing members that can be provided as replacement parts or as components in the manufacture of filter elements will then be discussed.

[0022] Figure 1 A canister filter system 100 is shown that can use filter elements 200 and integral sealing members 300 according to various embodiments of the present invention.

[0023] The canister filter system 100 may include a filter element 200 having a base 102, a canister 104, and an integral sealing member 300. The canister filter system 100 can be used to filter fluids such as diesel or gasoline or other liquid fuels, lubricating oils, hydraulic fluids for hydraulic power systems, transmission fluids, or even possibly engine intake air. The canister filter system 100 can also be used as a fuel / water separator filter. The canister filter system 100 having the features described herein can be adapted by those skilled in the art for many different purposes and is suitable for many other applications.

[0024] The base 102 includes an inlet channel 106 for fluid to enter the cartridge filter system 100 and an outlet channel 108 for fluid to exit the cartridge filter system 100. Clips (not shown) may be provided to attach the cartridge 104 to the base 102. Other connection methods may be used, such as threads, various fasteners, etc.

[0025] Can 104 includes, for example Figure 1 The top open end 112 and bottom open end 114 shown, or in other embodiments of the invention, a bottom closed end.

[0026] The filter element 200 can take many different forms to suit a particular application. In the illustrated embodiment, the filter element 200 is well-suited for filtering fuel or lubricating oil. The filter element 200 may include an annular filter medium 202 circumferentially surrounding a central reservoir 204 defined by a central tube 206. The axial ends of the annular filter medium 202 are shown sealed by a top end cap 208 and a bottom end cap 212.

[0027] The top end cap 208 defines an axial open end of the filter element 200. The top end cap 208 is referred to as an "opening" because it includes an opening 210 that allows fluid to pass through.

[0028] On the other hand, the bottom end cap 212 defines an axial open end of the filter element 200. The bottom end cap 212 is referred to as an "opening" because it allows the base 110 to be inserted into the center tube 206, etc.

[0029] The top end cap 208 and the bottom end cap 212 may each be attached to the center tube 206 by welding, adhesive, molding to the center tube, or the like. Alternatively, several or all of the center tube 206, the top end cap 208, and the bottom end cap 212 may be constructed as a single component. Conversely, the bottom end cap 212 and / or the top end cap 208 may be components separate from the center tube 206, etc. Further details regarding the closure construction of the bottom of the canister filter system 100 and the filter element 200 will be discussed below.

[0030] In operation, the fluid to be filtered enters through inlet channel 106 and flows into the annular cavity 118 between the tank 104 and the annular filter medium 202. The fluid then enters and passes through the filter medium 202, and then... Figure 1 The perforation 214 shown enters the central tube 206.

[0031] The fluid then exits the central tube 206 through the top end cap 208 and opening 210 into the outlet channel 108. Sealing structures at the top and bottom of the filter element 200 help define the fluid passages into and out of the annular filter medium 202, preventing any fluid from flowing directly into the outlet channel 108 and bypassing the annular filter medium 202. For this purpose, sealing features (e.g., round, pointed, flat, etc.) can be provided, which will be discussed in detail below. Furthermore, it may be desirable to form a chamber between the bottom of the filter element and the bottom of the canister (e.g., a water bowl, drain container, etc. in a fuel-water separator). Therefore, the base can provide positioning features. Other configurations of the filter element 200 are possible in other embodiments of the invention.

[0032] See now Figure 1 and Figure 2The canister filter system 100, including an integral sealing member 300, according to various embodiments of the present invention, will now be discussed.

[0033] from Figure 1 Initially, the canister filter system 100 may include a filter element 200, which at least partially comprises a cylindrical configuration (or an annular configuration, so that the different surfaces of the filter element and the integral sealing member can be surfaces of rotation that are consistent in the circumferential direction) and defines a longitudinal axis 216, a circumferential direction 217, and a radial direction 218. The filter element 200 may include an annular filter medium 202 defining a central channel 219 and a central tube 206 disposed in the central channel 219 of the annular filter medium 202, the central tube 206 defining a central reservoir 204. Thus, the annular filter medium 202 surrounds the central tube 206 and the central reservoir 204.

[0034] like Figure 1 As shown, the filter element 200 may also include a top open end 220 connected to a central tube 206 disposed along a longitudinal axis 216. The top open end 220 includes an opening 210 that allows fluid to flow from the central reservoir 204 to the outside of the filter element 200 (and may also allow insertion of a top base 110a).

[0035] Similarly, the filter element 200 may include a bottom opening 222 connected to the central tube 206 opposite to the top opening 220, the bottom opening 222 also being disposed along the longitudinal axis 216. Thus, the bottom opening 222 allows insertion into the bottom base 110.

[0036] The canister filter system 100 may further include a canister 104 and a bottom base 110. The canister 104 includes a top open end 112 and a bottom open end 114 relative to a longitudinal axis 216, and the bottom base 110 rests on the bottom open end 114 of the canister 104. In other embodiments of the invention, for example in Figure 1 In the case of the base 110 and the cylindrical container 104 being molded as one piece, the situation may not be as described.

[0037] See Figure 1 and 2 As can be seen, the canister 104 includes a sealing flange 120 (also referred to as a housing) disposed near the top opening 112 of the canister 104, while the base 102 includes a downward-facing sealing groove 122 (also referred to as a seal receiving groove) disposed near the bottom opening 114 of the base 102. An integral sealing member 300 may be attached to the filter element 200 and may include a sealing portion 302 disposed in the sealing groove 122 of the base 102 and contacting the sealing flange 120 of the canister 104.

[0038] like Figure 2 As best shown, the sealing groove 122 of the base 102 lies in a plane including the radial direction 218 and the longitudinal axis 216 (i.e., Figure 2 The cross-section of the cross-section at least partially includes a rectangular profile 124 or at least partially includes a trapezoidal profile 126. More specifically, the at least partially rectangular profile 124 may be defined by a top annular surface 128 perpendicular to the longitudinal axis 216 and a radially outward cylindrical surface 130 extending from the top annular surface 120. On the other hand, the at least partially trapezoidal profile 126 may be defined by a top annular surface 128 perpendicular to the longitudinal axis 216 and a radially inwardly angled surface 132 extending from the top annular surface 128 (at approximately 5° relative to the longitudinal axis 216 in the plane to provide introduction during assembly, and may be referred to as conical).

[0039] exist Figure 2 Furthermore, it can be seen that the sealing flange 120 of the cylindrical container 104 can extend axially upward and radially outward from the cylindrical wall 134 of the cylindrical container 104 (e.g., relative to the cylindrical wall 134 of the cylindrical container 104). Figure 2 (The radial direction in the plane forms an angle of approximately 20°). This may not be the case in other embodiments of the invention. That is, the cylindrical container can be constructed in other ways.

[0040] See Figure 1 It is understood that the sealing portion 302 can be arranged radially outward and axially below the top opening end 220 of the filter element 200 from the annular filter medium 202. For other embodiments, this may not be the case. For example, the sealing portion may even be axially positioned with respect to the top opening end, etc.

[0041] like Figure 2 As shown, the sealing portion 302 may include a single top sealing convex angle 304 and a pair of bottom sealing convex angles 306. The top sealing convex angle 304 contacts the top annular surface 128 of the sealing groove 122 of the base 102, and the bottom sealing convex angles 306 contact the sealing flange 120 of the canister 104 (providing sealing redundancy).

[0042] Looking more closely at the sealing portion 302, the sealing portion 302 of the integral sealing member 300 may include a radially inwardly angled surface 308 (also referred to as a cone) extending downward from the top sealing convex angle 304, a radially outwardly tapered surface 310 extending downward from the top sealing convex angle 304 (the two surfaces 308 and 310 provide an inlet for assembly), a radially inwardly cylindrical surface 312 extending downward from the radially inwardly angled surface 308 (also referred to as a cone), and a radially outwardly cylindrical surface 314 extending downward from the radially outwardly tapered surface 310. The radially outwardly cylindrical surface 314 and the radially inwardly cylindrical surface 312 are configured to contact the radially outwardly cylindrical surface 130 of the sealing groove 122 and the radially inwardly angled surface 132 of the sealing groove 122, respectively (e.g., by protruding in opposite radial directions), when the top sealing convex angle 304 is compressed (see arrow 136 for the amount of compression). This arrangement provides sealing redundancy.

[0043] Continue to refer to Figure 2 The base 102 includes a radially inner wall 138 that at least partially defines a sealing groove 122, and the radially inner wall 138 includes a free end 140 that defines a bottom convex arcuate engagement 142 facing radially inward and axially downward. Similarly, the integral sealing member 300 includes a bridging portion 316 (bridging from the connecting portion 318 of the integral sealing member 300 to the sealing portion 302) that defines a bridging concave arcuate engagement 320 that at least partially mates with the bottom convex arcuate engagement 142 of the base 102.

[0044] The canister 104 may further include an outer positioning wall 144 extending axially upward from the sealing flange 120, and the base 102 may further include a radial outer wall 146 that partially defines the sealing groove 122 and is configured to simultaneously contact the outer positioning wall 144 and the sealing flange 120 of the canister 104. This arrangement prevents the sealing portion 302 of the integral sealing member 300 from being over-compressed.

[0045] Next, we will now refer to Figure 3 and 4 The filter element 200 is described as a replacement part.

[0046] The filter element 200 may be constructed as previously described and may include an integral sealing member 300 attached to the filter element 200 and a sealing portion 302 that is radially away from the annular filter medium 202 and axially arranged between the top opening end 220 and the bottom opening end 222 of the filter element.

[0047] This connection can be achieved in various ways. For example, the top end cap 208 can be overmolded onto the center tube 206 and the integral sealing member 300, or the center tube 206, the top end cap 208, and the integral sealing member 300 can be formed as a single piece of material, or the integral sealing member 300 can be adhered to or welded to the top end cap 208, which can then be adhered to or welded to the center tube 206, etc. The integral sealing member 300 may include a top mounting ring 324 (see also...). Figure 5 The top mounting ring 324 is captured or otherwise held by a top end cap 208 extending on the top and sides of the top mounting ring 324. The structure 324 can also be used as a "press-fit nut stud" to deflect the medium during the overmolding of the end cap, thereby encapsulating the medium.

[0048] As mentioned earlier, the integrated sealing member 300 may also include a connecting portion 318 extending radially outward and axially downward from the top open end 220 of the filter element 200. Furthermore, the connecting portion 318 of the integrated sealing member 300 may be perforated (see orifice 322) to allow dirty fluid to flow through the integrated sealing member 300 to the annular filter medium 202 for filtration. For this purpose, the connecting portion 318 includes a series of downwardly extending angled members 326 (due to their angled extensions in the filter element 200). Figure 4 The cross-sectional plane forms an angle of approximately 15° with the longitudinal axis 216 (hence the designation), and a plurality of transverse members 330 connect each of this series of downwardly angled members 326 circumferentially (forming a mesh structure). In other embodiments of the invention, other configurations of the mesh structure are also possible. In some embodiments, the transverse members 330 may be omitted.

[0049] like Figure 4 As best shown, the sealing portion 302 of the integral sealing member 300 may include an upward-facing arrow portion 332 and an undulating portion 334 (also referred to as a bottom undulating portion) that is at least partially downward-facing. Other configurations of the sealing portion 302 are also possible in other embodiments of the invention.

[0050] Now refer to Figures 5 to 7 The discussion focuses on the integrated sealing member 300, which can be provided as a replacement component or as a component used in manufacturing the filter element 200 just described.

[0051] See Figure 5 and Figure 6The integral sealing member 300 may include at least a partially annular body 335 defining a longitudinal axis 337, a radial direction 339, and a circumferential direction 341. The at least partially annular body 335 may include a mounting portion 324a and a sealing portion 302, the sealing portion including at least one top sealing feature 343 (which may have any suitable shape, including arcuate, flat, pointed, etc.) and at least one bottom sealing feature 336 (which may have any suitable shape, such as a sealing weld with an arcuate, flat, pointed, etc.). Furthermore, a connecting portion 318 may extend radially outward from the mounting portion 324a (e.g., entirely radially outward, substantially radially outward, radially outward and axially downward, etc.) to the sealing portion 302.

[0052] In some embodiments, the connecting portion 318 also extends axially downward from the mounting portion 324a and defines a grid pattern. The mounting portion 324a may also include a ring (e.g., a top mounting ring 324 perpendicular to or defining the longitudinal axis 328).

[0053] The grid pattern may be formed at least partially by a plurality of members 338 extending radially outward and axially downward from the ring 324 to the sealing portion 302. Each of the plurality of members 338 may include a radially outward surface 340, and a groove 342 may be arranged on the radially outward surface 340, but not necessarily.

[0054] like Figure 7 As best shown, at least one top sealing feature 334 of the sealing portion 302 may include a top convex arcuate sealing surface 344, and at least one bottom sealing feature 336 of the sealing portion 302 may include a bottommost convex arcuate sealing surface 346 and a radially outermost convex arcuate sealing surface 348. The surface 348 may be configured to be radially outwardly close to the bottommost convex arcuate sealing surface 346, and a concave arcuate transition surface 350 is inserted therebetween.

[0055] The top convex arcuate sealing surface 344 can be at least partially radially inserted between the radially outermost convex arcuate sealing surface 348 and the bottommost convex arcuate sealing surface 346. The radially outermost convex arcuate sealing surface 348 can be at least partially axially disposed between the top convex arcuate sealing surface 344 and the bottommost convex arcuate sealing surface 346. This arrangement can define a tangent 352 that is tangent to the bottommost convex arcuate sealing surface 346 and the radially outermost convex arcuate sealing surface 348, in a direction including the radial direction 339 and the longitudinal axis 328 (i.e., Figure 7 The plane of the cross-section forms an acute angle 354 with the radial direction 339 (which can match the angle of the sealing flange of the cylinder). This may not be the case in other embodiments of the invention.

[0056] One-piece sealing components can be constructed using any suitable materials and manufacturing processes. For example, they can be injection molded using polyurethane materials with a hardness of 20 to 95 Shore A (e.g., 60 Shore A).

[0057] Any of the foregoing features, components, or assemblies may be structurally varied to differ from those specifically shown and described herein in other embodiments of the invention.

[0058] Another embodiment of the filter system 100a will now be discussed, the construction and operation of which are similar to those described above. Figures 1 to 7 The description is the same, unless it is consistent with the reference. Figures 9 to 12 The opposite of what is described.

[0059] like Figure 9 As shown, the canister filter system 100a may include a canister 104a, which includes a top open end 112a, a bottom open end or bottom closed end and a sealing groove 122a. The top open end 112a includes an externally threaded portion 113. The bottom open end or bottom closed end is disposed along a longitudinal axis 216a. Similar to the previous description, the sealing groove 122a is disposed near the top open end 112a.

[0060] The canister filter system 100a may further include a base 102a defining a top open end 148, a bottom opening 150 including an internally threaded portion 152, and a downwardly facing sealing surface 154 axially disposed between the top open end of the base 102a and the internally threaded portion 152. The surface 154 may be as follows: Figure 9 The shape shown is a plane or a cone, etc.

[0061] In addition, an integral sealing member 300a may be provided, which is attached to the filter element 200a and includes a sealing portion 302a arranged in the sealing groove 122a of the canister 104a and in contact with the downward-facing sealing surface 154 of the base 102a.

[0062] The sealing groove 122a of the cylindrical tank 104a can be in a plane including the radial direction 218a and the longitudinal axis 216a (e.g., Figure 9 The cross-section of the object includes at least a rectangular profile or at least a trapezoidal profile.

[0063] More specifically, the outline of at least a portion of the rectangle may be defined by a bottom annular surface 156 perpendicular to the longitudinal axis and a radially outer cylindrical annular wall 158 extending from the bottom annular surface 156. In other embodiments, the bottom annular surface may be conical instead of planar, and so on.

[0064] Similarly, the outline of at least part of the rectangle can be defined by a bottom annular surface 156 perpendicular to the longitudinal axis 216a and a radially inner cylindrical annular wall 160 extending from the bottom annular surface 156.

[0065] The radially outer cylindrical annular wall 158 may contact or nearly contact the base 102a (e.g., at the downward-facing sealing surface 154), and the radially inner cylindrical annular wall 160 may be spaced apart from the base 102a, thereby forming a gap 162. In other embodiments, the radially outer cylindrical annular wall 158 may not contact the base (providing a small gap), and a stop flange 172 may be disposed below the external threaded portion 113, the stop flange 172 contacting the internal threaded portion 152 of the base 102a (actually as...). Figure 9 (As shown), to help prevent excessive compression of the sealing portion 302a. In either case, the radially outer cylindrical annular wall may still be higher than the radially inner cylindrical annular wall, etc.

[0066] The sealing portion 302a of the integrated sealing member 300a can be radially outwardly disposed from the annular filter medium 202 and axially disposed below the top opening end 220a of the filter element 200. The sealing portion 302a may include a single top sealing convex angle 304 that contacts the downward-facing sealing surface 154 of the base 102a, and a pair of bottom sealing convex angles 306a that contact the bottom annular surface 156 of the sealing groove 122a of the cartridge. These convex angles can be reversed by 180 degrees, such that the bottom convex angle is the top convex angle, and the top convex angle is the bottom convex angle, etc.

[0067] The sealing portion 302a of the integrated sealing member 300a includes a radially inner conical surface 308a extending downward from the top sealing convex angle 304, a radially outer conical surface 310 extending downward from the top sealing convex angle 304, a radially inner cylindrical surface 312a extending downward from the radially inner conical surface 308a, and a radially outer cylindrical surface 314a extending downward from the radially outer conical surface 310. The radially outer cylindrical surface 314a and the radially inner cylindrical surface 312a are configured to contact the radially outer cylindrical annular wall 158 and the radially inner cylindrical annular wall 160 of the sealing groove 122a, respectively, when the top sealing convex angle 304 is compressed. In other embodiments of the invention, other configurations are possible.

[0068] See now Figures 9 to 12 It is understood that the integral sealing member 300a further includes a plurality of flanges 316a that are circumferentially spaced apart from each other to form a flow channel 356, and each of the plurality of flanges 316a extends from the radially inner conical surface 308a through the gap 162.

[0069] Furthermore, the canister 104a and the base 102a are radially spaced from the filter element 200a, forming an annular cavity 118a between them. Each of the plurality of flanges 316a extends into the annular cavity 118a. Thus, these flow channels are in fluid communication with the annular cavity, allowing the fluid to be filtered to flow downward through the integral sealing member to the annular filter medium, whereby the fluid flows circumferentially around the annular filter medium and through the medium to be cleaned.

[0070] Filter element 200a may be provided as an alternative to the canister filter system 100a just described, and will be constructed similarly or identically as previously discussed. Figures 1 to 7 The described filter element 200, except as per the reference... Figures 9 to 12 The following descriptions are inconsistent with or otherwise described.

[0071] First, the filter element 200a includes an integral sealing member 300a connected to the filter element 200a, and includes a sealing portion 302a and a connecting portion 318a. The sealing portion 302a is disposed at least radially away from the annular filter medium 202 and may be axially located between the top opening end 220a and the bottom end. The connecting portion 318a extends axially and radially away from the filter element 200a to the sealing portion 302a. More specifically, the connecting portion 318a of the integral sealing member 300a extends axially downward and radially outward from the top opening end 220a of the filter element 200a.

[0072] In other embodiments, it is conceivable that the sealing portion and the connecting portion may be arranged axially even with the top or bottom end of the filter element. Other configurations are also possible, and so on.

[0073] As mentioned earlier in this document, the connecting portion 318a of the integral sealing member 300a at least partially defines a plurality of flow channels 356. More specifically, the connecting portion 318a may include an axially extending skirt 358 defining a bottom portion 359, and a plurality of flanges 316a extending axially downward and radially outward from the bottom portion 359 of the skirt 358 to the sealing portion 302a, forming a plurality of flow channels 356. These channels may be shaped as a plurality of circumferentially extending slits (see...). Figure 11 In the form of a plurality of flanges 316a, these slits are circumferentially defined by a pair of flanges 316a and radially defined by a sealing portion 302a and an axially extending skirt 358.

[0074] In other embodiments, the flange may extend from other parts of the integral sealing member, such as from the circumferential surface of the mounting ring or skirt.

[0075] See Figures 10 to 12 The integral sealing member 300a includes a top mounting ring 324b that at least partially defines a central bore 360 ​​and a bottom surface 362.

[0076] like Figure 12 As best shown, the sealing portion 302a of the integral sealing member 300a includes an upward-facing arrow portion 332a and an at least partially downward-facing undulating portion 334a. The integral sealing member 300a may also include an annular wall 364 extending downward from the top mounting ring 324b, forming a central hole 360 ​​(at least partially). The annular wall 364 may also include a radially inward-facing surface 366 (e.g., a rotating surface such as a cylindrical or conical surface) and a sealing weld bead 368 disposed on the radially inward-facing surface 366. Furthermore, a plurality of press-fit nut studs 370 may extend axially downward from the bottom surface 362 of the top mounting ring 324b. This configuration allows the integral sealing member 300a to function as a potting material mold. Each of the plurality of press-fit nut studs includes a cylinder extending axially downward from the bottom surface of the top mounting ring or a helical extending rib connected to the bottom surface of the top mounting ring. Of course, in other embodiments, other suitable shapes for the press-fit nut studs may be used as needed or desired.

[0077] Now we will focus on Figures 10 to 12 Another embodiment of the integral sealing member 300a described above, which can be provided as a replacement component, is also described. The integral sealing member 300a may include at least a partially annular body defining a longitudinal axis 216a, a radial direction 218a, and a circumferential direction 217. The sealing member 300a may include a top annular mounting portion 324c, which includes a top mounting ring 324b having a bottom surface 362 and a plurality of press-fit nut studs 370 extending axially downward from the bottom surface 362. The top mounting ring 324b may also at least partially define a central bore 360, and the sealing portion 302a includes at least one top sealing feature 343 and at least one bottom sealing feature 336. A connecting portion 318a may extend axially downward and radially outward from the top annular mounting portion 324c to the sealing portion 302a.

[0078] The connecting portion 318a may include a radially outer skirt 358 extending axially downward from the top mounting ring 324b, and the top annular mounting portion 324c may further include a radially inner annular wall 364a extending axially downward from the top mounting ring 324b, the radially inner annular wall 364a at least partially forming the central hole 360. A sealing weld bead 368 may be disposed on the radially inner annular wall 364a, radially inward and extending circumferentially from the radially inner annular wall 364a.

[0079] As previously described, the connecting portion 318a may include a plurality of flanges 316a extending axially downward and radially outward from the radially outer skirt 358 to the sealing portion 302a.

[0080] As in Figure 11 and 12 As best seen, at least one top sealing feature 343 of the sealing portion 302a may include a top convex arcuate sealing surface 344, and at least one bottom sealing feature 336 of the sealing portion 302a includes a radially innermost convex arcuate sealing surface 372 and a radially outermost convex arcuate sealing surface 348a, the radially outermost convex arcuate sealing surface 348a being arranged radially outward to be adjacent to the radially innermost convex arcuate sealing surface 372, wherein a concave arcuate transition surface 350a is placed therebetween.

[0081] Furthermore, the top convex arcuate sealing surface 344 is at least partially radially inserted between the outermost radially convex arcuate sealing surface 348a and the innermost radially convex arcuate sealing surface 372. Additionally, the sealing portion 302a may include a radially inner tapered surface 308a extending from the top convex arcuate sealing surface 344, and a plurality of flanges 316a are connected to the radially inner tapered surface 308a. This may not be the case in other embodiments of the invention.

[0082] The integral sealing member 300a can be configured to function as a mold. For this purpose, the top mounting ring 324b may not have any through-holes communicating with the central bore 360, the radially outer skirt 358 may not have any through-holes, and the radially inner annular wall 364a may not have any through-holes communicating with the central bore 360. This allows the integral sealing member 300a to contain any potting material injected therein. The radially inner annular wall 364a may be disposed in the central tube 206, wherein the sealing weld bead 368 is disposed in the central bore 360, which can contact the annular wall of the base (e.g., Figure 9 (As shown).

[0083] In such Figure 11 and 12 In some embodiments shown, each of the plurality of flanges 316a includes a radially extending leg 374 and a curved portion 376 connecting the radially extending leg 374 to a radially outer skirt 358. The radially extending leg 374 may be connected to a radially inner tapered surface 308a of the sealing portion 302a. In other embodiments of the invention, these flanges may be constructed differently and otherwise attached to the sealing portion.

[0084] exist Figure 12 In this configuration, the innermost radially convex arcuate sealing surface 372 and the outermost radially convex arcuate sealing surface 348a may define a fully radially extending common tangent 378. This may not be the case in other embodiments of the invention.

[0085] The integral sealing component can be constructed using any suitable materials and manufacturing processes. For example, it can be injection molded using a polyurethane material with a hardness of 20 to 95 Shore A (e.g., 60 Shore A). In other embodiments, any suitable flexible material, such as polyurethane, elastomers, rubber, and foam, can be used.

[0086] Any of the foregoing features, components, or assemblies may be structurally varied to differ from those specifically shown and described herein in other embodiments of the invention.

[0087] Industrial applicability

[0088] In practice, filter elements, integral sealing components, or canister filter systems according to any embodiment disclosed herein may be available or supplied in an OEM (Original Equipment Manufacturer) or aftermarket context. The various features previously discussed can be used to provide sealing redundancy while also simplifying assembly.

[0089] for Figures 1 to 7 In the illustrated embodiment, the mesh form of the integrated seal can be completely encapsulated within the potted filter end cap. Furthermore, the potting material can form a seal with the base to separate clean fluid from dirty fluid, and vice versa.

[0090] on the other hand, Figures 9 to 12 The illustrated embodiment provides a cup-shaped, integral seal intended to serve as a mold for potting material. Potting material can be injected into the seal, and chemical and physical bonding to the potting material is required. Furthermore, undercuts or other physical bonding aids can be provided between the end cap and the potting material. These undercuts will be located inside the end cap, where they engage with the potting material. Additionally, the integral seal has an integral sealing weld bead that contacts the base, thereby separating clean fluid from dirty fluid.

[0091] The connection point between the sealing section and the flexible leg (also known as the flange or bridging section) has been moved from the lower third to the upper third of the sealing section to accommodate the movement of the sealing groove from the filter base to the filter housing (also known as the canister).

[0092] In view of the foregoing, various embodiments of this application, such as Figures 1 to 7 and Figures 9 to 12 The assembly method of the canister filter system shown is as follows: Figure 8 As shown, this method allows for assembly in three or fewer steps while also providing sealing redundancy.

[0093] Method 400 may include inserting a filter element into one of a base and a canister until a seal contacts a radially inner portion of the base and one of the canisters, and until another seal contacts a radially outer portion of the base and one of the canisters (step 402). For example, the sealing contact at the radially inner portion of the base is... Figure 1 As shown in 402a, the sealing contact at the radially inner portion of the canister is... Figure 1 It is shown as 402b. Similarly, the sealing contact in the radially outer portion of the base is... Figure 1 As shown in 402c, the sealing contact is located on the radially outer portion of the canister. Figure 1 It is shown as 402d in the middle.

[0094] Next, the method may further include inserting the filter element into the other of the base and the canister until one seal contacts the other of the radially inner portion of the base and the canister, and until the other seal contacts the other of the radially outer portion of the base and the canister (step 404).

[0095] For example, step 402 may include inserting the filter element into the canister, simultaneously or virtually simultaneously creating sealing contacts 402b and 402d, such as Figure 1 As shown, step 404 may include inserting the filter element into the base to create a sealing contact at 402a and 402c, and vice versa. Steps 402 and 404 may be performed simultaneously or at different times.

[0096] The base and the canister can be connected to each other by threads, clamps, other fasteners, etc. (step 406). Step 406 can be completed after or during steps 402 and 404.

[0097] The method may also include Figure 8 Steps 401 and 401a. Step 401 may include manufacturing a filter element by forming an integral seal by completely encapsulating the seal within a potted filter end cap, while step 401a may include manufacturing a filter element by chemically and physically bonding the seal to the potting material by infusing the seal with encapsulating material.

[0098] It is also conceivable that an integral sealing member may be connected to the bottom of the filter element (e.g., at the bottom end cap) and extend along a portion of the bottom and / or side wall of the canister, terminating at a sealing portion near the sealing flange of the canister, and so on.

[0099] It should be understood that the foregoing description provides examples of the disclosed components and techniques. However, it is conceivable that other embodiments of the invention may differ in detail from the foregoing examples. All references to the invention or examples thereof are intended to refer to the specific examples discussed at that point and are not intended to imply any limitation on the scope of the invention more generally. All language used to distinguish and derogatoryly describe certain features is intended to lack preference for those features, but unless otherwise indicated, does not completely exclude them from the scope of the invention.

[0100] Unless otherwise stated herein, the description of numerical ranges herein is intended only as a shorthand for individually referring to each individual value falling within the range, and each individual value is incorporated into the specification as if it were described separately herein.

[0101] It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the apparatus and assembly methods discussed herein without departing from the scope or spirit of the invention. Other embodiments of the invention will be apparent to those skilled in the art in light of the description and practice of the various embodiments disclosed herein. For example, the construction and function of some devices may differ from those described herein, and certain steps of any method may be omitted, performed in a different order than specifically mentioned, or in some cases performed simultaneously or as sub-steps. Furthermore, variations or modifications may be made to certain aspects or features of the various embodiments to produce other embodiments, and features and aspects of the various embodiments may be added to or substituted for other features or aspects of other embodiments to provide other embodiments.

[0102] Therefore, this invention includes all modifications and equivalents of the subject matter described in the appended claims as permitted by applicable law. Furthermore, unless otherwise stated herein or clearly contradicted by the context, the foregoing elements are covered by this invention in all possible combinations of their variations.

Claims

1. A filter element comprising at least one partially annular configuration defining a longitudinal axis, a radial direction, and a circumferential direction, the filter element comprising: Annular filter media that defines the central channel; A central tube is disposed in the central channel of the annular filter medium, the central channel defining a central reservoir, and the annular filter medium surrounds the central tube and the central reservoir. A top opening end is connected to the central tube arranged along the longitudinal axis, the top opening end including an opening that allows fluid to flow from the central reservoir to the outside of the filter element; The bottom end is connected to the central tube opposite to the top open end, and the top open end is arranged along the longitudinal axis; as well as An integral sealing member is attached to the filter element and includes a sealing portion and a connecting portion. The sealing portion is arranged radially away from the annular filter medium, and the connecting portion extends at least radially away from the filter element to the sealing portion. The integral sealing member includes a top mounting ring that at least partially defines a central hole, and a bottom surface, and The sealing portion of the integral sealing member includes an upward-facing arrow portion and at least partially downward-facing undulating portions, and also includes an annular wall extending downward from the top mounting ring forming the central hole, the annular wall including a radially inward-facing surface and a sealing weld bead disposed on the radially inward-facing surface, and a plurality of press-fit nut studs extending axially downward from the bottom surface of the top mounting ring.

2. The filter element according to claim 1, wherein, The connecting portion of the integral sealing member extends axially downward and radially outward from the top opening end of the filter element, such that the sealing portion is axially located between the top opening end and the bottom end.

3. The filter element according to claim 1, wherein, The connecting portion of the integral sealing member at least partially defines a plurality of flow channels.

4. The filter element according to claim 3, wherein, The connecting portion includes an axially extending skirt that defines a bottom portion, and a plurality of flanges that extend axially downward and radially outward from the bottom portion of the skirt to the sealing portion, forming a plurality of flow channels in the form of a plurality of circumferentially extending slits that are circumferentially defined by a pair of the plurality of flanges and radially pass through the sealing portion and the axially extending skirt.

5. An integral sealing component, comprising: A body at least partially annular, the at least partially annular body defining a longitudinal axis, a radial direction, and a circumferential direction, the at least partially annular body comprising... The top annular mounting portion includes a top mounting ring having a bottom surface and a plurality of press-fit nut studs extending axially downward from the bottom surface. The top mounting ring also at least partially defines a central hole. The top annular mounting portion further includes a radially inner annular wall extending axially downward from the top mounting ring. The radially inner annular wall at least partially forms the central hole and includes a sealing weld bead disposed on the radially inner annular wall. The sealing portion includes an upward-facing arrow portion formed by at least one top sealing feature and an undulating portion at least partially facing downward formed by at least one bottom sealing feature; as well as The connecting portion extends radially outward from the top annular mounting portion to the sealing portion.

6. The integral sealing member according to claim 5, wherein, The connecting portion includes a radially outer skirt extending axially downward from the top mounting ring, and the sealing weld faces radially inward toward the radially inner annular wall and extends circumferentially from the radially inner annular wall. The top mounting ring has no through-hole communicating with the central hole, the radially outer skirt has no through-hole, and the radially inner annular wall has no through-hole.

7. The integral sealing member according to claim 6, wherein, The connecting portion includes a plurality of flanges extending axially downward and radially outward from the radial outer skirt to the sealing portion, and each of the plurality of press-fit nut studs includes a cylinder extending axially downward from the bottom surface of the top mounting ring or a helical extending rib attached to the bottom surface of the top mounting ring, each of the plurality of flanges including a radially extending leg and a curved portion connecting the radially extending leg to the radial outer skirt, and the integral sealing member is made of polyurethane having a Shore A hardness of 20 to 95, thereby allowing the integral sealing member to be used as a potting mold.

8. The integral sealing member according to claim 7, wherein, The at least one top sealing feature of the sealing portion includes a top convex arcuate sealing surface, and the at least one bottom sealing feature of the sealing portion includes a radially innermost convex arcuate sealing surface and a radially outermost convex arcuate sealing surface, the radially outermost convex arcuate sealing surface being radially outwardly disposed adjacent to the radially innermost convex arcuate sealing surface, and a concave arcuate transition surface being inserted therebetween, and the top convex arcuate sealing surface being at least partially radially inserted between the radially outermost convex arcuate sealing surface and the radially innermost convex arcuate sealing surface, and the sealing portion including a radially inner conical surface extending from the top convex arcuate sealing surface, the plurality of flanges being attached to the radially inner conical surface, and the radially innermost convex arcuate sealing surface and the radially outermost convex arcuate sealing surface defining a fully radially extending common tangent.

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