FILTER WITH SHIELD FEATURES

Abstract

In an embodiment, a filter media support frame for supporting first and second panels of filter media in a spaced apart relation is provided. The filter media support frame includes a first panel support, a second panel support and a connection portion. The first panel support has a first inner side and a first outer side. The second panel support has a second inner side and a second outer side. The second inner side faces the first panel support. The first connection portion hingedly connects to the first panel support by a first hinge portion and hingedly connects to the second panel support by a second hinge portion. Filter elements including the filter media support road filter media are provided.

Claims

1. A filter element comprising: a frame including a panel support portion having opposed first and second panel supports and a first end positioned between the first and second panel supports and a filter media pack having: a first portion of filter media positioned against the first panel support; a second portion of filter media positioned against the second panel support; and a connection region of filter media connecting the first and second portions of filter media, the connection portion extending across the first end.

2. The filter element of claim 1, further comprising a handle, the handle extending across the connection region of filter media with the connection region of filter media positioned between the handle and the first end of the frame.

3. The filter element of claim 1, wherein the filter media pack is pleated filter media having a plurality of pleat folds forming a plurality of pleat panels, the pleat folds extending generally parallel to the first end of the frame.

4. The filter element of claim 1, wherein the first portion of filter media forms a first panel of pleated filter media having a first inner face and the second portion of filter media forms a second panel of pleated filter media having a second inner face, the first and second panel supports are angled relative to one another such that the first and second inner faces are non-parallel to one another and form a cavity therebetween.

5. A filter media support frame for supporting first and second panels of filter media in a spaced apart relation, the filter media support frame comprising: a first panel support having a first inner side and a first outer side; a second panel support having a second inner side and a second outer side, the second inner side facing the first panel support, the second outer side facing away from the first panel support; a first connection portion connecting the first panel support to the second panel support, the first connection portion hingedly connected to the first panel support by a first hinge portion and hingedly connected to the second panel support by a second hinge portion.

6. The filter media support frame of claim 5, wherein the first and second hinge portions are living hinges and the first panel support, second panel support and the first connection portion are formed as a single continuous piece of material.

7. The filter media support frame of claim 5, wherein: the first panel support has a first end proximate the first connection portion and a second end spaced apart from the first end, the first panel support having a first engagement region positioned between the first end and second end, the first engagement region spaced away from the first connection portion; the second panel support has a first end proximate the first connection portion and a second end spaced apart from the first end, the second panel support having a second engagement region positioned between the first end and second end, the second engagement region spaced away from the first connection portion, the second engagement region engaging the first engagement region.

8. The filter media support frame of claim 7, wherein engagement between the first and second engagement regions inhibits movement of the first and second panel supports relative to the connection portion via the first and second hinge portions.

9. The filter media support frame of claim 6, wherein the living hinges are provided by reduced thickness regions.

10. The filter media support frame of claim 7, wherein the first and second engagement regions snap engage one another, are adhesively bonded to one another, are frictionally engaged with one another, are engaged with an interference fit or are ultrasonically welded to one another.

11. The filter media support frame of claim 6, wherein: the first hinge portion has a first hinge region connecting the first connection portion to the first panel support, the first hinge region being proximate a first end of the first connection portion, the first hinge portion has a second hinge region connecting the first connection portion to the first panel support, a first slot is formed between the first and second hinge regions of the first hinge portion and between the first connection portion and the first panel support; and the second hinge portion has a first hinge region connecting the first connection portion to the second panel support, the first hinge region being proximate the first end of the first connection portion, the second hinge portion has a second hinge region connecting the first connection portion to the second panel support, a second slot is formed between the first and second hinge regions of the second hinge portion and between the first connection portion and the second panel support.

12. The filter media support frame of claim 5, further comprising: an annular base frame having opposed first and second sidewalls and opposed third and fourth sidewalls extending between the opposed first and second sidewalls, the first, second, third and fourth sidewalls surround an opening through the base frame, the first, second, third and fourth sidewalls defining a continuous groove; a first end cap being cup shaped having a panel portion and an annular wall extending outward from the panel portion defining a first well, the first well of the first end cap receiving a first end of the first panel support, a first end of the second panel support, and a first end of the first connection portion; a second end cap being cup shaped having a panel portion and an annular wall extending outward from the panel portion defining a second well, the second well of the second end cap receiving a second end of the first panel support, a second end of the second panel support, and a second end of the first connection portion; a continuous sealant material located within the continuous groove and extending around the opening, the sealant material sealing the annular wall of the first end cap to the first sidewall of the base frame, the sealant material sealing the annular sidewall of the second end cap to the second sidewall of the base frame.

13. The filter media support frame of claim 12, wherein: the first end cap includes a first attachment flange that extends into a portion of the continuous groove provided by the first sidewall of the base frame, the sealant material engaging the first attachment flange; and the second end cap includes a second attachment flange that extends into a portion of the continuous groove provided by the second sidewall of the base frame, the sealant material engaging the second attachment flange.

14. The filter media support frame of claim 13, wherein: the first attachment flange includes at least one aperture, the sealant material extending through the at least one aperture or the first attachment flange; the second attachment flange includes at least one aperture, the sealant material extending through the at least one aperture of the second attachment flange.

15. The filter media support frame of claim 12, further including a first snap connection arrangement between the first endcap and the base frame and a second snap connection arrangement between the second endcap and the base frame.

16. The filter media support flame of claim 12, further including a handle having, a first end received in the first end cap and a second end received in the second end cap, the handle being adjacent the first connection portion, the handle having a gripping portion, a first alignment projection between the first end and the gripping portion and a second alignment projection between the second end and the gripping portion; wherein: the first end cap includes a first alignment groove that receives the first alignment projection when the first end of the handle is received in the first end cap; and the second end cap includes a second alignment groove that receives the second alignment projection when the second end of the handle is received in the second end cap.

17. The filter media support frame of claim 7, wherein the first engagement region defines a channel and the second engagement region is received within the channel.

18. A filter element comprising: a filter media support frame of claim 5; a filter media portion supported against the first panel support; and a second filter media portion supported against the second panel support, the first and second panel supports being positioned between the first and second filter media portions.

19. The filter element of 18, further including a connection region of filter media connecting the first and second portions of filter media, the first and second filter media portions and connection region of filter media are formed from a continuous piece of filter media, the connection region of filter media extending across the first connection portion of the filter media support frame.

20. The filter element of claim 19, further including: a first end cap structure secured to a first end of the first filter media portion, a first end of the second filter media portion, a first end of the filter media support frame and a first end of the connection region of the filter media; and a second end cap structure secured to a second end of the first filter media portion, a second end of the second filter media portion, a second end of the filter media support frame and a second end of the connection region of the filter media; and the first and second filter media portions, filter media support frame and connection region of filter media being positioned between the first and second end cap structures.

21. The filter element of claim 20, further including a base frame adhesively secured to the first and second filter media portions and the first and second end cap structures by a continuous piece of adhesive.

22. The filter element of claim 21, wherein the continuous piece of adhesive also provides a seal for sealing with a filter housing.

23. The filter element of claim 22, wherein the continuous piece of adhesive is formed by a foamed urethane.

24. A filter element comprising: a filter media support frame of claim 12; a first filter media portion supported against the first panel support, the first filter media portion having: a first end received in the first end cap; a second end received in the second end cap; a third end adjacent the first connection portion; a fourth end sealed to the third sidewall of the base frame by the sealant material; and a second filter media portion supported against the second panel support, the first and second panel supports being positioned between the first and second filter media portions, the second filter media portion having: a first end received in the first end cap; a second end received in the second end cap; a third end adjacent the first connection portion; and a fourth end sealed to the fourth sidewall of the base frame by the sealant material.

25. A method of making the filter element of claim 18 comprising: forming the filter media support frame; folding the first panel support relative to the first connection portion about the first hinge portion; folding the second panel support relative to the first connection portion about the second hinge portion; and locating the filter media support frame between the first and second of filter media portions.

26. The method of claim 25, wherein the first and second portions of filter media are formed from a continuous piece of filter media and are connected to one another by a connection region of filter media, the connection region of filter media extends across the first connection portion of the filter media support frame.

27. The method of claim 26, further comprising: attaching a first end cap structure to a first end of the first filter media portion, a first end of the second filter media portion, a first end of the filter media support frame and a first end of the connection region of the filter media; and attaching a second end cap structure to a second end of the first filter media portion, a second end of the second filter media portion, a second end of the filter media support frame and a second end of the connection region of the filter media, such that the first and second filter media portions, filter media support frame and connection region of filter media being positioned between the first and second end cap structures.

28. The method of claim 27, further comprising using an adhesive to adhesively seal the first and second end caps and first and second portions of filter media to a base frame that defines a base frame opening that is in fluid communication with a cavity formed between the first and second portions of filter media.

29. The method of claim 28, wherein the adhesive is a foamed urethane.

30. The method of claim 28, wherein the adhesive forms a filter housing seal that surrounds the base frame opening.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0111] The accompanying drawings incorporated in and forming a part of the specification, together with the description, serve to explain the principles of the disclosure. In the drawings:

[0112] FIG. 1 is a perspective illustration of a first embodiment of a filter element;

[0113] FIG. 2 is a partial perspective illustration of the filter element of FIG. 1;

[0114] FIG. 3 is an exploded illustration of the filter element of FIG. 1;

[0115] FIG. 4 partial perspective illustration of the filter element of FIG. 1;

[0116] FIG. 5 is an enlarged partial illustration of the filter element of FIG. 1;

[0117] FIG. 6 is an enlarged partial illustration of the filter element of FIG. 1;

[0118] FIG. 7 is partial cross-sectional illustration of the filter element of FIG. 1;

[0119] FIG. 8 is an enlarged partial cross-sectional illustration of the filter element of FIG. 1;

[0120] FIG. 9 is a partial perspective illustration of another embodiment of a filter element;

[0121] FIG. 10 is a partial perspective illustration of the filter element of FIG. 9;

[0122] FIG. 11 is a perspective illustration of another embodiment of a filter element;

[0123] FIG. 12 illustrates the base frame of the filter element of FIG. 1;

[0124] FIG. 13 illustrates the support frame of the filter element of FIG. 1;

[0125] FIG. 14 is a partial perspective illustration of an alternative embodiment of a filter element;

[0126] FIG. 15 is a partial perspective illustration of an alternative embodiment of a filter element;

[0127] FIG. 16 is a perspective illustration of a filter assembly according to an embodiment;

[0128] FIG. 17 is a cross-section of the filter as of FIG. 16;

[0129] FIG. 18 is a perspective illustration of the filter element of the filter assembly of FIG. 16;

[0130] FIG. 19 is an exploded illustration of the filter element of FIG. 18;

[0131] FIG. 20 is a cross-section of the filter assembly of FIG. 16;

[0132] FIG. 21 is a perspective illustration of a further filter assembly according to an embodiment;

[0133] FIG. 22 is a cross-section of the filter assembly of FIG. 21;

[0134] FIG. 23 is a cross-section of the filter assembly of FIG. 20 with the housing lid removed;

[0135] FIG. 24 is a perspective illustration of the filter element of the filter assembly of FIG. 21;

[0136] FIG. 25 is an exploded illustration of the filter element of FIG. 24;

[0137] FIG. 26 is a perspective illustration of another embodiment of a filter element;

[0138] FIG. 27 is a partial exploded illustration of the filter element of FIG. 26;

[0139] FIG. 28 is a cross-sectional, partial exploded illustration of the filter element of 26;

[0140] FIG. 29 is a perspective illustration of another embodiment of a filter element;

[0141] FIG. 30 is a perspective illustration of the filter element of FIG. 29 with one end cap structure removed;

[0142] FIG. 31 is an exploded illustration of the filter element of FIG. 29;

[0143] FIG. 32 is a partial illustration of the frame members of the filter element of FIG. 29;

[0144] FIG. 33 is a perspective illustration of a support frame of the filter element of FIG. 29;

[0145] FIG. 34 is a partial cross-sectional illustration of the filter element of FIG. 29;

[0146] FIG. a cross-section and exploded illustration of the filter element of FIG. 29;

[0147] FIG. 36 is a perspective illustration of an end cap of the filter element of FIG. 29;

[0148] FIG. 37 is a cross-sectional illustration of the filter element of FIG. 29 with the filter media thereof removed;

[0149] FIG. 38 is a further cross-sectional illustration and exploded illustration of the filter element of FIG. 29 with the filter media thereof removed;

[0150] FIG. 39 is a perspective illustration of the base frame and some adhesive of the filter element of FIG. 29;

[0151] FIG. 40 is a further cross-sectional illustration of the filter element of FIG. 29;

[0152] FIG. 41 is a perspective illustration of another embodiment of a filter element;

[0153] FIG. 42 is an exploded illustration of the filter element of FIG. 41;

[0154] FIG. 43 is a partial, cross-sectional illustration of the filter element of FIG. 41 with the filter media thereof removed; and

[0155] FIG. 44 is a perspective illustration of a support frame of the filter element of FIG. 41.

[0156] While the invention will be described in connection with certain preferred embodiments, there is not intent to limit it to those embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.

DETAILED DESCRIPTION OF THE INVENTION

[0157] FIG. 1 is a perspective illustration of an embodiment of a filter element 100 for filtering air. The filter element 100 will filter fluid such as an as it is passed therethrough to remove particulates and impurities carried by the fluid being filtered.

[0158] The filter element 100 includes a pair of filter media panels 102, 104 through which the fluid passes that performs the filtering. The filter media panels 102, 104 may be formed from various different types of filter media and in one embodiment the filter media panels 102, 104 are provided by pleated filter media. The pleated filter media is formed by a plurality of adjacent pleat panels connected to one another at a plurality of alternating folds in an accordion fashion.

[0159] With reference to FIG. 2, the filter media panels 102, 104 are mounted to a multi-component holding assembly and oriented such that the filter media panels extend at an angle relative to one another. Due at least to the angle a between the filter media panels 102, 104, the filter media panels 102, 104 firm a cavity 106 therebetween.

[0160] With reference to FIG. 3, the filter media panels 102, 104 each have a generally rectangular periphery including a first side 112, 114, a second side 116, 118, a third side 120, 122 and a fourth side 124, 126. The filter media panels 102, 104 also include inner faces 128, 130 that face one another when assembled and outer faces 132, 134 that face away from one another when assembled. The faces are bounded by the first 112, 114, second 116, 118, third 120, 122 and fourth 124, 126 sides. The inner and outer faces 128, 130, 132, 134 may be considered flow faces as the primary fluid flow through the filter media panels 102, 104 is through these faces 128, 130, 132, 134.

[0161] The multi-component holding assembly 140 is configured to mount the filter media panels 102, 104 in the desired orientation. The multi-component holding assembly 140 of the illustrated embodiment generally includes a support frame 142, a base frame 144, first and second end cap structures 146, 148 and a second side support structure 178.

[0162] The support frame 142 generally maintains the first and second filter media panels in the desired spaced orientation such that cavity 106 (FIG. 2) is formed. In the illustrated embodiment, the spaced orientation is angled at angle as indicated previously. In this configuration, the interior faces 128, 130 are maintained in a non-parallel, non-perpendicular orientation with the first sides 112, 114 of the first and second filter media panels 102, 104 spaced apart from one another a greater distance than the second sides 116, 118. This orientation gives cavity 106 a wedge shape.

[0163] With additional reference to FIG. 13, the support frame 142 generally defines first, second, third and fourth sides 152, 154, 156, 158. The first and second sides 152, 154 are generally offset from one another and extend between the third and fourth sides 156, 158. With additional reference to FIG. 4 (which has filter media panel 102 and end cap structure 146 removed for clarity, in the assembled state, the first side 152 of the support frame 142 is adjacent the first sides 112, 114 of the filter media panels 102, 104, the second side 154 of the support frame 142 is adjacent the second sides 116, 118 of the filter media panels 102, 104, the third side 156 of the support frame 142 is adjacent the third sides 120, 122 of the filter media panels 102, 104 and the fourth side 158 of the support frame 142 is adjacent the fourth sides 124, 126 of the filter media panels 102, 104.

[0164] In this embodiment, the first side 152 of the support frame 142 defines a first side opening 160 through which fluid flows during the filtering process to exit cavity 160 between the filter media panels 102, 104. The first, second, third and fourth sides 152, 154, 156, 158 of the support frame 142 also bound first and second flow openings 162, 164 that are adjacent to filter media panels 102, 104, respectively, when assembled, through which fluid flows prior to or after passing through corresponding filter media panels 102, 104 depending on if the filter element 100 is configured for inside-out or outside-in fluid flow.

[0165] The support frame 142, in the illustrated embodiment, includes an overlap portion 166 that has opposite first and second flange portions 168, 170 that extend laterally outward in opposite directions. The first and second flange portions 168, 170 extend laterally outward. such that the overlap portion 166 overlaps at least a portion of each of the second sides 116, 118 of the first and second filter media panels 102, 104. The bottom surfaces of the flange portions 168, 170 adjacent the filter media panels 102, 104 may be angled relative to a central bisecting plane 172 of the support frame 142 at an angle equivalent to angle /2 plus ninety degrees.

[0166] The support frame 142 is operably connected to the base frame 144. The support frame 142 in the illustrated embodiment includes snap structures 174 that snap engage corresponding snap structures 176 of the base frame 144. In the illustrated embodiment, snap structures 174 are provided by apertures formed in a portion of the support frame 142 proximate the intersection of the first side 152 with the third and fourth sides 156, 158. Snap structures 176 are outward extending projections sized and positioned to extend into the apertures provided by snap structures 174. The projections provided by the snap structures 176 may have tapers or ramps to facilitate connecting the support frame 142 to the base frame 144. Engagement of the snap structures 174 with snap structures 176 is illustrated in FIG. 5.

[0167] In alternative embodiments, the snap structures could be reversed and other cooperating snap structures are contemplated. The snap engagement facilitates initial assembly of the multi-component holding assembly 140 prior to mounting of the filter media panels 102, 104.

[0168] A second side support structure 178 is operably connected to the second side 154 of the support frame 142. The second side support structure 178 includes connection elements 180 that extend into recesses 182 (also referred to as receptacles) formed in the support frame 142. Preferably, the fit between the connection elements 180 and the recesses provides a snap engagement. The second side support structure 178 extends between opposed first and second ends 184, 186 with a connection element 180 at each end. The cooperating catch arrangement of the connection elements 180 and recesses 182 may include catches or undercuts to form an improved connection between the support frame 142 and the second side support structure 178 such as illustrated in FIG. 7.

[0169] The second side support structure 178 overlaps the flange portions 168, 170 of the support frame 142. With additional reference to FIG. 8, in one embodiment where the filter media panels 102, 104 are formed from pleated media with the folds 185 (see FIG. 1) of the pleated media extending perpendicularly between the third and fourth sides 120, 122, 124, 126 of the filter media panels, at least one panel 187 of each filter media panel 102, 104 is pinched between a top surface of the corresponding flange portion 102, 104 and a bottom surface of the second side support structure 178. A seal material 188, such as a glue bead or adhesive is applied to seal the portion of the pleated media between the second side support structure 178 and the second side 154, e.g. flange portions 168, 170, to seal the filter media panels 102, 104 along the second sides 116, 118 thereof. The seal material 188 will also help secure the second side support structure to the second side 154 of the support frame 142. The support frame 142 defines a second side stop 179 that extends between the third and fourth sides 156, 158 against which the inner faces 128, 130 of the first and second filter media panels 102, 104 proximate the second sides 116, 118 thereof rest when in an assembled state.

[0170] The second side support structure 178 (also referred to as a handle member) includes a handle 189 including a gripping portion configured to be grasped by a user to remove the filter element 100 at maintenance intervals. The handle 189 is located axially between the opposed first and second ends 184, 186 of the second side support structure 178.

[0171] With reference to FIG. 13, in the illustrated embodiment, the third and fourth sides 156, 158 are formed from frame segments including a pair of converging elongated segments 190, 192 and a cross-brace segment 194 that extends between the elongated segments 190, 192. The pair of converging elongated segments 190, 192 for the third and fourth sides 156, 158 converge proximate the second side 154. The snap structures 174 are formed as part of the cross brace segments 194.

[0172] The first side 152 of the support frame is defined by the cross-brace segments 194 and a pair of first side elongated segments 196, 198 that extend generally parallel to one another between the third and fourth sides 156, 158 in a spaced apart relation.

[0173] The support frame opening is defined by the cross-brace segments 194 and the pair of first side elongated segments 196, 198.

[0174] When assembled, the inner faces 128, 130 of the first and second filter media panels may rest against the elongated segments 190, 192 and 196, 198.

[0175] The base frame 144 cooperates with the support frame 142 to support the filter media panels 102, 104. The base frame 144 supports a first side 112, 114 of the filter media panels 102, 104.

[0176] With reference to FIG. 3 and primary reference to FIG. 12, the base frame 144 defines a base frame opening 200 through which dirty fluid enters or dean fluid exits the filter element based on the flow direction of the fluid through the filter element. More than one base frame opening may be provided if multiple sets of filter media panels are mounted to a single base frame 144.

[0177] In the illustrated embodiment, the base frame 144 includes a pair of opposed captured portions in the form of first and second outward extending flanges 202, 204. The outward extending flanges 202, 204 extend away from one another on opposite sides of the base frame opening 200 and form under cuts 206, 208.

[0178] Locating surfaces 210, 212, 214, 216 of the outward extending Ranges 202, 204 support opposed ends of the first sides 112, 114 of the filter media panels 102, 104. In the illustrated embodiment, the locating surfaces 210, 212, 214, 216 are tapered relative to central plane 172 at angle of 90 minus angle /2. As such, the locating surfaces are generally perpendicular to the planes 220, 222 (see FIG. 2) defined by the first, second, third and fourth sides 152, 154, 156, 158 of the support frame 142 against which the first and second filter media panels 102, 104 rest when assembled. Locating surfaces 210, 214 that support the first filter media panel 102 are generally parallel to flange portion 168 of the support frame 142 as well as the first side 112 of the filter media panel 102 while locating surfaces 212, 216 support the first side 114 of filter media panel 104 and are general parallel to flange portion 170 of the support frame 142 as well as the first side 114 of filter media panel 104. The tapered locating surfaces are generally perpendicular to the inner and outer faces 128, 130, 132, 134 of the filter media panels 102, 104. Locating surfaces 210, 212 of the first flange 202 extend at a non-parallel non-perpendicular angle relative to one another as well as bisecting central plane 172. Locating surfaces 214, 216 of the first flange 204 extend at a non-parallel non-perpendicular angle relative to one another as well as bisecting central plane 172.

[0179] Flanges 202, 204 each define a corresponding elevated segment 224, 226 positioned between corresponding tapered locating surfaces 210, 212 and 214, 216. The elevated segments 224, 226 define snap structures 176 that cooperate with snap structures 174 as described above. The elevated segments 224, 226 are straddled by segments 196, 198 when assembled to assist in locating the support frame 142 relative to the base frame 144.

[0180] The base frame 144 includes support members 228 that have tapered surfaces 230, 232 similar to tapered locating surfaces 210, 212, 214, 216 and that facilitate support of the first sides 112, 114 of the filter media panels 102, 104 as well as elevated projections 234 (also referred to as tabs) for locating the elongated segments 196, 198. The support members 228 extend across base frame opening 200 between parallel extending side member portions 236, 238

[0181] The base frame 144 carries a sealing gasket 240 used to seal the filter element 100 to a filter housing (not shown). The sealing gasket 240 in the illustrated embodiment is a continuous piece of D-style rope stock. The sealing gasket 240 is carried in an annular groove 242 that circumscribes the base frame 144. In the illustrated embodiment, the sealing gasket 240 defines a radial seal. However, other embodiments could define an axial seal.

[0182] The first and second end cap structures 146, 148 assist in operably sealing the filter media panels 102, 104 to the support frame 142 and/or base frame 144 to prevent fluid from bypassing the filter media panels 102, 104.

[0183] The first end cap structure 146 operably seals the third sides 120, 122 of thee filter media panels 102, 104 and the second end cap structure 148 operably seals the fourth sides 124, 126.

[0184] The first outward extending flange 202 of the base thane 144 is captured in the first end cap structure 146 while the second outward extending flange 204 of the base frame 144 is captured in the second end cap structure 148. Not only are the first and second outward extending flanges 202, 204 captured by the first and second end cap structures 146, 148, but the third side 156 of the support frame 142 is captures by the first end cap structure 146 while the fourth side 158 of the support frame 142 is captured by the second end cap structure 148.

[0185] In an embodiment, the first and second end cap structures 146, 148 are composite structures with each including a cupped end cap 250, 252 and adhesive within the cupped end cap 250, 252. The cupped end caps 250, 252 form wells for holding the adhesive. The adhesive may be a foamed urethane or known potting material. Other materials include hot melt, plastisol, epoxy, non-foamed urethane, etc. The adhesive of the first end cap structure 146 captures the third sides 120, 122 of the filter media panels 102, 104, the first outward extending flange 202, the third side 156 of the support frame 142 and the first end 184 of the second side support structure 178. The adhesive of the second end cap structure 148 captures the fourth sides 124, 126 of the filter media panels 102, 104, the second outward extending flange 204, the fourth side 158 of the support frame 142 and the second end 186 of the second side support structure 178.

[0186] The cupped end caps 250, 252 also each include outward extending mounting flanges 254, 256 for assisting in mounting the filter element 100 in a filter housing (not shown).

[0187] In addition to the adhesive of the end cap structures 146, 148, sealant beads may be applied between the first skies 112, 114 of the filter media panels 102, 104 and the base frame 144 to sealingly secure the filter media panels 102, 104 to the base frame 144. To further support the filter media panels 102, 104, adhesive may be applied to the tapered surfaces 230, 232 of the support members 228 as well as to the top surfaces of side members 236, 238. Further yet, adhesive is applied to the second sides 116, 118 of the filter media panels 102, 104 and the second side 154 of the support frame 142 as described above.

[0188] In FIG. 3, an optional support screens 290 are illustrated that will be positioned between the first and second filter media panels 102, 104 and the support frame 142 and the base frame 144 as will be described in more detail with regard to the embodiment of FIG. 9 described below. The support screens 290 are formed from an expanded metal to form the through apertures and include embossed rib structures 292. The rib structures 292 are pressed into the support screens 290 to provide increased support for the filter media panels 102, 104. While illustrated as being horizontal rib structures 292 that extend longitudinally between the third and fourth sides 120, 122, 124, 126 of the filter media panels 102, 104 when assembled, the rib structures 292 could have other orientations and shapes. For instance they could extend vertically, e.g. between first and second sides 112, 114, 116, 118 or could be diagonal or form an X-shape. Preferably, the rib structures 292 extend inward and away from the corresponding media panels 102, 104 so that the rib structures 292 do not interfere with mounting or locating of the filter media panels 102, 104.

[0189] This embodiment is also illustrated with optional pleat stabilizers mounted on the inner and outer faces of the filter media panels. The pleat stabilizers may be in the form of molded components mounted to the filter media panels or could be hot melt or urethane beads applied to the filter media panels in a direction extending generally transverse to the edges/tips of the pleats when pleated media is used.

[0190] The features of the aforementioned support screens 290 and pleat stabilizers can be equally applied to all embodiments herein, where appropriate and not directly contradicted.

[0191] FIG. 9 illustrates a further embodiment of a filter element 300 according to the teachings of the present invention. This embodiment is substantially similar to the prior embodiment and only the primary differences will be described. Where not contradicted by context, the features of this embodiment may be used with the structure of the prior embodiment. One of the filter media panels and end cap structures has been removed for ease of understanding.

[0192] This filter element 300 is generally designed for an outside-in flow. As such, fluid will flow through the outer faces 334 of the filter media panels 304 (only one is shown) first and then exit the filter element 300 through base from opening 400 formed in the bottom of the base frame 344.

[0193] To provide improved support of the filter media panels 304, first and second support screens 305 are provided. Only one of the support screens 305 is readily visible. This support screen 305 would support the filter media panel that has been removed. However, a similar support screen 305 supports filter media panel 304 that is illustrated.

[0194] The support screens 305 are positioned between the support frame 342 and base frame 344 and the filter media panels 304. The support frame 342 and base frame 344 support the support screens 305. In the illustrated embodiment, the support screens 305 are generally L-shaped having a first side portion 307 and an inner face portion 309. The first side portion 307 is positioned adjacent the first sides 314 of the filter media panels 304 as well as the outward extending flanges 402, 404 and support members 428. The inner face portion 309 is positioned adjacent the inner faces 130 of the filter media panels 304.

[0195] In some embodiments, the first side portion 307 and inner face portion 309 of the support screens are formed from a single piece of material bent to correspond to the L-shape formed by the connected support frame 342 and base frame 344. In alternative embodiments, the first side portion 307 and inner face portion 309 may be formed from separate pieces of screen. Preferably, the support screens are formed from embossed expanded screen material.

[0196] With additional reference to FIG. 10, this embodiment also utilizes pleat stabilizers 472 when the filter media panels are formed from pleated filter media. The pleat stabilizers 472 provide support to the filter media due to a pressure drop across the filter media panels. The pleat stabilizers 472 may also maintain a desired spacing of the adjacent pleats.

[0197] While the end cap structures of the prior embodiments are described as multi-component end caps, other embodiments may utilize one-piece end caps. For instance, the end cap could be formed from a single piece of rigid urethane that is formed around the various components that are to be captured by the end cap structures discussed previously.

[0198] FIG. 11 illustrates a further embodiment of a filter element 500. This embodiment is similar to and can include substantially all of the features of the prior embodiments. However, this embodiment utilizes two banks of filter media panels 502A, 504A and 502B, 504B mounted to a single base frame 544.

[0199] FIG. 14 is a partial perspective illustration of a further embodiment of a filter element 100. This embodiment is similar to and can include substantially all of the features of the prior embodiments. The filter element 100 has an alternative handle 189 having first and second curved portions 191, 193. The filter element 100 has pleat stabilizers 472 extending the entire length of the filter media panels 102,104. In addition, the filter element 100 has intermediate cross-braces 195 that extend between the converging elongated segments 190, 192 that provide additional structural support to the support frame 142. It will be readily understood that the handle 189, pleat stabilizers 472 and cross-braces 195 can be used individually or in combination with any of the embodiments disclosed herein.

[0200] FIG. 15 is a partial perspective illustration of a further embodiment of a filter element 100. This embodiment is similar to and can include substantially all of the features of the prior embodiments. The filter element 100 has an alternative handle 189 having first and second handle base flanges 197, 199. The filter element 100 has pleat stabilizers 472 extending the entire length of the filter media panels 102, 104. In addition, the filter element 100 has intermediate cross-braces 195 that extend between the converging elongated segments 190, 192 that provide additional structural support to the support frame 142. It will be readily understood that the handle 189, the first and second handle base flanges 197, 199, pleat stabilizers 472 and cross-braces 195 can be used individually or in combination with any of the embodiments disclosed herein.

[0201] FIGS. 16 and 17 illustrate a filter assembly 701 in accordance with an embodiment of the invention. The filter assembly 701 includes a filter housing 703 that houses a filter element 700 (see FIG. 17) for filtering a flow of fluid (typically air) that flows from an unfiltered inlet 709 to a clean air outlet 711 while passing through the filter element 700.

[0202] The filter housing 703 generally includes a housing base 705 and a housing lid 707 that define a central cavity 708 interposed between the inlet 709 and the outlet 711. The housing base 705 may be made from multiple components connected together. The housing lid 707 is removable to provide access to the central cavity 708 to provide access to the filter element 700 for replacement of the filter element 700 when it becomes spent.

[0203] A pre-cleaner arrangement 713 is positioned proximate the inlet 709 and is upstream of the filter element 700 to help filter larger impurities prior to the air reaching the filter element 700.

[0204] The filter element can include most features and structures of the prior filter elements described in FIGS. 1-15. More particularly, the filter element 700 includes a pair of filter media panels 702, 704 (also referred to as media packs) and a multi-component holding assembly configured to mount the filter media panels 702, 704 in the desired orientation. The multi-component holding assembly is similar to those described previously and generally includes a support frame 742 (see FIG. 19), a base frame 744, first and second end cap structures 746, 748 and a second side support structure 778. As illustrated in prior embodiments, the filter media panels 702, 704 the multi-component holding assembly is configured such the filter media panels 702, 704 are canted relative to one another such that the filter media packs converge proximate second sides 716, 718 and diverge, i.e. are spaced apart, proximate sides 712, 714. Here a clean air cavity is formed between inner faces of the filter media panels 702, 704.

[0205] The second side support structure 778 is connected to the filter media panels 702, 704 as described above with reference to FIGS. 7 and 8. The second side support structure 778 may also be referred to as a handle frame as it supports handle 789. The second side support structure 778 bridges any gap formed between the adjacent second sides 716, 718 of the filter media panels 702, 704.

[0206] The base frame 744 carries a sealing gasket 840 used to seal the filter element 700 to a filter housing 703 (see FIG. 17). The sealing gasket 840 in the illustrated embodiment is a continuous piece of D-style rope stock. In this embodiment, the sealing gasket 840 defines a radially directed seal with a radially inner surface of the housing base 705. However, axial seals could be provided. The seal provided by sealing gasket 840 prevents dirty air from bypassing the filter element 700 as it flows from inlet 709 to outlet 711. The sealing gasket 840 alone or in combination with other components such as base frame 714 may be considered a housing seal system.

[0207] With reference to FIG. 17, in the illustrated embodiment, the housing lid 707 includes an inward extending tubular projection 715. Among other things, the tubular projection 715 can be used to make sure that the filter element 700 is axially inserted far enough into the filter housing 703.

[0208] The second side support structure 778 of this embodiment is configured to provide improved protection of the filter media of the filter media panels 702, 704, particularly during installation of the filter element 700 into the filter housing. The second side support structure 778 includes a central bridge element that spans the region between the second sides 716, 718 of the filter media panels 702 704. A plurality of shield elements in the form of wing panels 777, 781 and 783 project laterally from the bridge element 775 out over the second sides 716, 718 for protecting the filter media defining second sides 716, 718 of the filter media panels 702, 704. The shield elements extend over the end region, e.g. second sides 716, 178 of the filter media packs. The shield elements, e.g. wing panels 777, 781, 783 provide a location where a riser directly or indirectly (e.g. via projection 715) can apply axial pressure to the filter element 700 to press the filter element 700 into the filter housing 703 through the opening of the filter housing 703 covered by housing lid 707.

[0209] These wing panels 777, 781, 783 are beneficial when filter media panels 702, 704 are formed from pleated filter media with the pleat panels extending generally parallel to second sides 716, 718, i.e. oriented such as illustrated in FIG. 8. The pleat panels, and corresponding folds (also illustrated in FIG. 8), of the filter media panels 702, 704 extend laterally between the third and fourth sides 720, 722 and 724, 726 and corresponding end cap structures 746, 748. With the pleat panels oriented in this manner, if a user applies pressure to the pleat panel direction to push the filter element into the filter housing 703 tearing of the filter media proximate the end cap structures 746, 748 can occur as there is limited axial support for the filter media pleat panels. Further, wing panel 783 helps prevent projection 715 from pressing directly on the pleat panel.

[0210] In this embodiment, the wing panels 777, 781, 783 extend on both sides of bridge element 775. However, other embodiments could have wing panels that are formed on only a single side of the bridge element 775. Further, in the illustrated embodiment, the second side support structure 778 including the bridge element 775 and wing panels 777, 781 and 783 are formed from a single molded plastic component and then operably secured to the rest of the frame components as further described with regard to prior embodiments.

[0211] With reference to FIGS. 18 and 19, the second sides 716, 718 of filter media panels 702, 704 define a width W1 between opposed outer faces 732, 734. Wing panels 777, 781, 783 have widths W2-W4. Widths W1-W4 are transverse to a length L1 of the filter media panels 702, 704 proximate second sides 716, 718, which define an end of the filter element. In an embodiment, the widths W2-W4 are at least 40% the width W1 defined by the filter media panels 702, 704. More preferably, the widths W2-W4 are at least 75% the width W1 and more preferably at least 90% of width W1. In some embodiments, the wing panels 777, 781, 783 could have widths W2-W4 that are equal to or greater than width W1.

[0212] In some embodiments, width W1 is between 3 and 5 inches and more preferably between 3.5 and 4.5 inches. In some embodiments, widths W2 and W3 are between 2.5 inches and 5 inches and more preferably between 3.5 and 4.5 inches. In some embodiments, width W4 is between 2.5 and 5 inches and more preferably between 3 and 4 inches.

[0213] Further, the length L1 is measured between third sides 720, 722 and fourth sides 724, 726. The wing panel 777, 781, 783 have lengths L2-L4 measured parallel to length L1. Preferably, lengths L2-L4 are at least 5% of length L1. In some embodiments, length L4 is at least 10% of length L1 in a representative example, length L1 is between 10 and 20 inches and more preferably between 13 and 17 inches. Preferably, lengths L2 and L3 are at least 0.5 inches and more preferably at least 0.75 inches and more preferably at least 0.85 inches. Length L4 is preferably at least 2 inches and more preferably at least 2.5 inches and more preferably at least 3 inches.

[0214] To improve strength, wing panels 777 and 781 have a tapering length when moving towards bridge element 775. More particularly, the portion of the wing panels 777, 781 furthest from the bridge element 775 have a smaller length than the portion of the wing panels 777, 781 proximate the bridge element 775 where the wing panels 777, 781 transition into the bridge element 775. For instance, in some embodiments, the length proximate the bridge element may be between 0.75 and 1.5 inches and more preferably between 1.15 inches and 1.35 inches.

[0215] In the illustrated embodiment, the end cap structures 746, 748 are cup shaped including a panel section and an outward extending annular wall that define a cavity. The outer most edges of the wing panels 777, 781 extend into the cavity formed by the annular wall of end cap structures 746, 748 such that opposed ends of the second side support structure 778 are received in the correspondence end cap structures 746, 748. Due to this configuration, a portion of wing panels 777, 781 are hidden within the end cap structures 746, 748 while another portion is exterior of the end cap structures 746, 748 and exposed. As discussed above, this allows for proper sealing of the filter media panels 702, 704 to prevent undesirable fluid bypass. Preferably, a greater extent of the lengths L2, L3 of the wing panels 777, 781 extends out of the end cap structures 746, 748 than is received and hidden therein. In a preferred embodiment, the annular wall of the end cap that overlaps the wing panels 777, 781 overlap the wing panels 777, 781 by less than 0.5 inches and at least 0.25 inches. In a preferred embodiment, the exposed portion of lengths L2, L3 of the wing panels 777, 781 is at least 0.4 inches and more preferably at least 0.5 inches.

[0216] In some embodiments, the shield elements could cover the entire length L1 and width W1 of second sides 716, 718 of the filter media panels 702, 704. However, this arrangement would increase flow restriction.

[0217] A handle 789 is spaced away from the wing panel 783 and is used for removing the filter element 700 from the housing 703 at maintenance intervals. As illustrated in FIG. 17, handle 789 is received within an open free end of tubular projection 715 when installed within housing 703.

[0218] The filter assembly 701 further includes a safety filter 721 downstream from filter element 700 and upstream from the outlet 711 of the filter housing 703. The safety filter 721 assists in protecting any downstream systems in the event of a failure of the filter element 700. Filter element 700 may also be referred to as a primary filter element.

[0219] Safety filter 721 includes a frame 723 that carries a seal element 725 for sealing with filter housing 703. The frame 723 is downstream from and supports filter media 727. Filter media 727 may take many forms but is most typically a panel of pleated filter media.

[0220] As illustrated in FIG. 20, the outer perimeter of tubular projection 715 is smaller than wing panel 783. More particularly, the diameter D1 of the outer perimeter of tubular projection 715 is smaller than or equal to the width W4 of wing panel 783. This relative relationship prevents the free end of the tubular projection 715 from coming into contact with the outer most panel(s) of the media pack and damaging the integrity of the filter media. The inner periphery of the tubular projection 715 is sized to receive the handle 789.

[0221] FIGS. 21-25 illustrate a filter assembly 901 according to another embodiment. The filter assembly 901 is similar in many respects to filter assembly 701 except it includes a filter element 900 (see e.g. FIGS. 22-25) that is similar to filter element 500. More particularly, the filter element 900 of this embodiment utilizes two banks of filter media panels 902A, 904A and 902B, 904B mounted to a single base frame 944.

[0222] The filter housing 903 includes a housing base 905 and a housing lid 907. The filter housing 903 include inlet 909 and outlet 911.

[0223] With principle reference to FIGS. 24 and 25, the filter element 900 includes a pair of banks of filter media panels 902A, 904A and 902B, 904B (also referred to as media packs) and a multi-component holding assembly configured to mount the filter media panels 902A, 904A and 902B, 904B in the desired orientation. The multi-component holding assembly is similar to those described previously and generally includes a pair of support frames 942A, 942B (see FIG. 19), a base frame 944, first and second end cap structures 946A, 948A and 946B, 948B and a pair of second side support structures 978A, 978B. As illustrated in prior embodiments, the multi-component holding assembly is configured such that the filter media panels 902A, 904A and 902B, 904B of each bank are canted relative to one another such that the filter media packs converge proximate second sides and diverge, are spaced apart, proximate the opposed sides. Here a clean, air cavity is formed between inner faces of the corresponding sets of filter media panels 902A, 904A and 902B, 904B, respectively.

[0224] The second side support structures 978A, 978B are connected to the corresponding banks of filter media panels 902A, 904A and 902B, 904B as described above. The second side support structures 978A, 978B may also be referred to as a handle frame as it supports handles 989A, 989B. The second side support structures 978A and 978B bridge any gap formed between the adjacent second sides of the corresponding filter media panels 902A, 904A and 902B, 904B of the corresponding bank of filter media panels. More particularly, each second side support structure 978A, 978B includes a central bridge element 975A, 975B. Each second side support structure 978A, 978B also includes A plurality of shield elements in the form of wing panels 977A, 981A, 983A, 977B, 981B, 983B that project laterally from the bridge elements 975A, 975B.

[0225] With reference to FIG. 22, the housing lid 907 includes a pair of tubular projections 915A, 915B that cooperate with the corresponding handles of the second side support structures 978A, 978B.

[0226] The dimensions described above for filter element 700 apply to each bank of filter media panels of filter element 900.

[0227] FIGS. 26-28 illustrate a further feature of some embodiments. While prior embodiments illustrate the use of preformed sealing gaskets (e.g. sealing gasket 840), the sealing gasket of filter element 1100 is a sealing gasket 1240 molded directly to the base frame 1144. The base frame 1144 of this embodiment includes a plurality of openings 1145 that allow material of the sealing gasket 1240 to extend therethrough for securing the sealing gasket 1240 to the base frame 1144. The portions of the sealing gasket 1240 extending through the openings 1145 seal the openings 1145 to prevent fluid bypass. The openings are formed between adjacent leg segments 1147. The leg segments 1147 are connected at distal ends by an annular bottom segment 1149.

[0228] The rest of the construction of filter element 1100 can be according to the features described above for the other filter elements.

[0229] FIG. 29 is a perspective illustration of a filter element 1200 for filtering fluid such as air according to a further embodiment. The filter element 1200 is similar in many respects to the prior embodiments and the differences thereof will be focused on below.

[0230] With additional reference to the exploded illustration of FIG. 31, the filter element 1200 includes a pair of filter media portions 1202, 1204 that take the form of filter media panel portions, similar to the filter media panels discussed above (e.g. filter media panels 102, 104, 304, 502, 504, etc.). However, in this embodiment, the filter media portions 1202, 1204 are formed from a single continuous piece of filter media. In particular, a connection region of filter media 1203 extends between and interconnects filter media portion 1202 with filter media portion 1204.

[0231] In a particular embodiment, the filter media portions 1202, 1204 are formed from pleated filter media. However, other filter media is contemplated (e.g. non-pleated block portions of filter media). Filter media portions 1202, 1204 and interconnection region of filter media 1203, in some embodiments, are formed from a single continuous sheet of filter media. This sheet of media can be folded to form the pleated configuration of each filter media portion 1202, 1204 and then folded to provide connection region 1203.

[0232] Much like the prior embodiments, the filter media portions 1202, 1204 are mounted to a multi-component holding assembly 1240 and oriented such that the filter media portions 1202, 1204 extend at angle relative to one another similar to angle described above, for example, with regard to filter element 100.

[0233] Each of filter media portion 1202 and 1204 could be considered to be a filter media panel portion and in general have the same general rectangular periphery and inner and outer faces 1228, 1232, which, again, may be considered flow faces as the primary fluid flow through the filter media portions 1202, 1204 is through these faces.

[0234] The multi-component holding assembly 1240 supports the filter media panel portions 1202, 1204 in the desired orientation. The angle orientation mentioned above helps define cavity 1206 between the inner faces 1232 of the filter media panel portions 1202, 1204. Due to the angled orientation, this cavity is generally wedge shaped and the faces 1228, 1232 of the filter media portion 1202 are generally non-parallel and non-perpendicular to the faces 1228, 1232 of the filter media portion 1204. However, the faces 1228, 1232 of filter media portion 1202 are generally parallel to one another and the faces 1228, 1232 of filter media portion 1204 are generally parallel to one another.

[0235] The multi-component holding assembly 1240 generally includes a support frame 1242, a base frame 1244 and first and second end cap structures 1246, 1248. A support member 1278 may be provided that can include a handle 1289 similar to prior embodiments.

[0236] With reference to FIGS. 32 and 33, the support frame 1242 of this embodiment includes a first panel support 1250, a second panel support 1252 and a connection portion 1254 that extends between and connects the first and second panel supports 1250, 1252. In one embodiment, the connection portion 1254 is hingedly connected to first panel support 1250 by hinge 1255 and the connection portion 1254 is hingedly connected to second panel support 1252 by hinge 1256. This allows the support frame 1242 to be formed in a substantially flat orientation and then folded to the A-shaped orientation as illustrated in FIG. 33. The hinges 1255, 1256 in the illustrated embodiment are formed by living hinges. In such an embodiment, the first and second panel supports 1250, 1252 and connection portion 1254 can be formed by a single body formed from a single continuous piece of material, e.g. a single molded body.

[0237] The living hinges may be provided by reduced strength hinge regions 1257. The reduced strength hinge regions 1257 can be provided by reduced thickness. The reduced thickness could be intermittent along the corresponding hinges 1255, 1256 in some embodiments.

[0238] To further facilitate locating the bending between the panel supports 1250, 1252 and connection portion 1254, slits 1258 may extend along the hinges 1255, 1256 between adjacent hinge regions 1257 that connect the connection portion 1254 to first and second panel supports 1250, 1252.

[0239] In the illustrated embodiment, the panel supports 1250, 1252 include a pair of elongated segments 1260, 1262 that are generally spaced apart from another with a plurality of interconnection elongated segments 1264, 1265 1266 extending therebetween. The outer surfaces of these elongated segments 1260, 1262, 1264, 1265, 1266 provide support for the inner faces 1232 of the filter media portions 1202, 1204 (see FIG. 34).

[0240] The first panel support 1250 includes a first engagement region 1270 that cooperates with a second engagement region 1271 of the second panel support 1252. In this embodiment, the first and second engagement regions 1270, 1271 abut one another in a face-to-face orientation. While not necessary, in some embodiments, the engagement regions 1270, 1271 can be affixed to one another, such as by way of ultrasonic bonding, adhesive boding, snap engagement, and friction and/or interference fits. In one embodiment, such as illustrated in the embodiment described below, one engagement region defines a slit in which a portion of the other engagement region is received to help maintain engagement and proper orientation during assembly.

[0241] In this embodiment, the engagement regions are only provided by the center elongated segments 1265 of each of the panel supports 1250, 1252. In other embodiments, the engagement regions could be provided by other ones of the elongated segments 1260, 1262, 1264, 1266 in the alternative or inclusive of center elongated segments 1265.

[0242] Elongated segment 1262 may include a shelf configuration provided by an outwardly extending flange 1272. A side of the filter media panel portions 1202, 1204 can rest on this flange 1272 to properly locate the filter media panel portions 1202, 1204.

[0243] FIG. 35 illustrates the filter element 1200 in cross-section and in partially exploded form but further illustrates the flange portion 1272 as well as the engagement regions 1270, 1271.

[0244] FIGS. 34 and 35 illustrate filter media connection region 1203 sandwiched between support member 1278 and connection portion 1254. This avoids the need to provide sealant between the media and the support frame 1240 to prevent leak paths as in prior embodiments discussed above where only a portion of a pleat of each individual filter media panel is sandwiched between the support member and the support frame. Thus, providing the filter media connection region 1203 eliminates one potential leak path.

[0245] When using pleated filter media, the pleat folds of the filter media will typically be oriented similar to that as illustrated in FIG. 1 and FIG. 8 illustrated for prior filter elements, e.g. the pleat fold will extend between the end cap structures 1246, 1248.

[0246] The base frame 1244 is an annular member that defines a base frame opening 1300 through which fluid flows. For an outside-in flow, the base frame opening 1300 is downstream from the filter media provided by media portions 1202, 1204 such that dirty fluid will pass through the filter media portions 1202, 1204 and then clean fluid will exit cavity 1206 through base frame opening 1300. In an outside-in flow, the dirty fluid will flow through base frame opening 1300 and then pass through the filter media portions 1202, 1204 such that clean fluid will exit through outer faces 1232 of the filter media portions 1202, 1204.

[0247] In this example, the base frame 1244 is generally annular and includes a plurality of sidewalls that bound the base frame opening 1300. The base frame 1244 is generally rectangular shaped and includes and generally includes first, second, third and fourth sidewalls with the first and second sidewalls being parallel and spaced apart with the third and fourth sidewalls being parallel, spaced apart and extending between the first and second sidewalk.

[0248] A seal gasket 1241 is mounted to and extends around the base frame 1244. The seal gasket 1244 is used to seal the filter element 1200 and particularly the base frame 1244 to a filter housing, such as illustrated with regard to FIG. 17 for prior embodiments. In this embodiment, the seal gasket 1241 is mounted in a groove formed in the outer periphery of the base frame 1244 and provides a radially outward directed seal surface. However, axial seals are contemplated. The seal gasket 1241 may be a preformed section of sealing gasket that is wrapped around the base frame 1244 (with or without an adhesive between the base frame 1244 and the sealing gasket 1241) or could be a mold in place seal gasket.

[0249] The first and second end cap structures 1246, 1248 are attached to and seal opposed ends of the filter media portions 1202, 1204. The end cap structures 1246, 1248 assist in sealing the filter media portions 1202, 1204 to the base frame 1244 to prevent fluid from bypassing the filter media portions 1202, 1204 in use.

[0250] The first and second end cap structures 1246, 1248 could take numerous forms. For example, the first and second end cap structures 1246, 1248 could be composite structures, mold in place structures or single body structures in which the filter media and various other components are embedded therein (e.g. after heating thereof).

[0251] In the illustrated embodiment, the end cap structures 1246, 1248 are composite structures with each including a cupped end cap 1268 and an adhesive within the cupped end cap 1268. FIG. 36 illustrates the cupped end cap 1268. The cupped end cap 1268 forms well 1269 for holding the adhesive. The adhesive may be a foamed urethane or known potting material. Other materials include hot melt, plastisol, epoxy, non-foamed urethane, etc.

[0252] With reference to FIGS. 31 and 36, the well 1269 is generally V-shaped with one portion 1280 receiving an end of the first filter media portion 1202, another portion 1282 receiving an end of the second filter media portion 1204. A connection region 1284 of the well 1269 connects the first and second portions 1280, 1282 and accommodates an end of the support member 1278, an end of the connection portion 1254 of the support frame 1242, and the connection region of the filter media 1203. In addition to the end of the connection portion 1254 of the support frame 1242, ends of the first and second panel supports 1250, 1252 are also received in first and second portions 1280, 1282, respectively of the well 1269.

[0253] The cup shaped end cap 1268 generally has a flat panel from which a sidewall projects to form the V-shaped well 1269 and define the various portions thereof. Again, the well 1269 would be filled with an adhesive material to seal the ends of the filter media to the end cap structure and prevent fluid bypass. The adhesive also secures the end cap structures 1246, 1248 to the support frame 1242.

[0254] The ends of the support frame 1242 are stepped in various locations to facilitate locating the support frame 1242 within the wells 1269 of the end cap structures 1246, 1248. For example, with additional reference to FIGS. 33 and 36, the outer elongated segments 1266, 1264 are stepped such as at region 1286 to abut the inner edge of wall portions 1288 of the cupped end cap 1286. Similarly, the support frame 1242 is stepped at region 1290 such that the ends of flanges 1272 abut wall portion 1292 of the cupped end cap 1286.

[0255] In the illustrated embodiment, and with reference to FIG. 37, the flange 1272 is preferably flush with wall portion 1292 when assembled so as to provide for a good seating and support of the filter media portions 1202, 1204.

[0256] The base frame 1244 also includes locating abutments 1294 that abut wall portion 1292 of the cupped end cap 1286 to assist in proper positioning of the end caps 1286 during assembly.

[0257] With reference to FIGS. 38-40, the base frame 1244 defines an annular groove 1296 (identified with a dashed arrow in FIG. 39 as the groove 1296 is filled with an adhesive 1298) for holding adhesive 1298. The groove 1296 is continuous and extends within all of the four sidewalls of the base frame 1244. Thus, adhesive 1298 also forms a continuous bead of adhesive that extends around the base frame opening 1300.

[0258] The adhesive 1298 seals the ends cap structures 1246, 1248 to the base frame 1244 and particularly cooperates with an outer surface of wall portion 1292 that faces the base flame 1244.

[0259] With reference to FIG. 40, in addition to sealing the end cap structures 1246, 1248 to the base frame, the adhesive 1298 seals the filter media portions 1202, 1204 to the base frame 1244. As illustrated, the adhesive 1298 engages ends 1302 of the lifter media portions 1202, 1204, which rest on the upper surface of the sidewalls of the base frame 1244.

[0260] Thus, the filter media is sealed to end caps 1246, 1248 and base frame 1244 to prevent dirty fluid bypass.

[0261] With reference to FIG. 38, end caps 1286 also include securement tabs 1306 for increasing the connection between the end caps 1286 and the base frame 1244. The securement tabs 1306 extend into the groove 1296 and into adhesive 1298 once assembled. The securement tabs 1306 include apertures 1308 through Which the adhesive 1298 extends to further increase strength of the connection therebetween.

[0262] In addition to securement tabs 1306, the end caps 1286 snap engage with base frame 1244. This can facilitate securing the two components while adhesive 1298 cures. In this embodiment, snap structure 1276 engages snap structure 1274. Snap structure 1276 is a tab that has an outward extending head that engages snap structure 1274 which is in the form of a shelf formed into the base frame 1244 (see e.g. FIGS. 37, 38 and 40).

[0263] FIG. 41 illustrates a further filter element 1400. The filter element 1400 is similar to the prior titter elements in many respects and the discussion of filter element 1400 will be focused on the differences thereof.

[0264] Filter element 1400 includes filter media portions 1402, 1404 that are connected to one another by a connection region 1403 (see FIG. 42) such that filter media portions 1402, 1404 are formed from a single continuous piece of filter media similar to filter media portions 1202, 1204.

[0265] Endcap structures 1446, 1448 include an alignment member 1447 to assist in assembly as well as to provide additional rigidity to the resulting filter element 1400 post assembly.

[0266] Each alignment member 1447 includes a slot 1449 that receives projection 1451 of the support member 1478. Slot 1449 is formed between legs 1453 that are formed with end caps 1468. In the illustrated embodiment, the legs 1453 are formed as a projection extending from the sidewall portion that defines the well 1469 of the end cap structures 1446, 1448.

[0267] In addition, the end caps 1468 include vertically extending projections 1455 that extend from legs 1453. These vertically extending projections 1455 are laterally spaced and straddle the projection 1451. These projections 1455 are used to locate the filter element 1400 on an inner periphery of a corresponding filter housing in which the filter element 1400 is to be installed.

[0268] In this example, the snap structures 1474, 1476 have been reversed from the prior example. In filter element 1400, the base frame 1444 snap structure 1476 that is in the form of an axially extending projection that includes a laterally extending head portion. The end cap 1468 provide snap structure 1474 that are engaged by the head portion of snap structure 1476.

[0269] With additional reference to FIG. 43, in this example, the base frame 1444 provides annular groove 1496. However, in this embodiment, the groove 1496 has pockets 1497 that extend entirely axially through the sidewalls forming the base frame 1444. The groove 1496 and included pockets 1497 allow a portion 1498 of gasket member 1441 to be molded to the base frame 1444. In a preferred example, the gasket member 1441 is molded directly to base frame 1444 after the rest of the filter element 1400 has generally been assembled.

[0270] More particularly, portion 1498 of gasket member 1441 will extend through pockets 1497 and within groove 1496. This portion 1498 will seal the end caps 1468 to the base frame 1444 as well as seal ends 1502 of the filter media portions 1402, 1404 to the base frame 1444. Thus, in this embodiment, the gasket member 1441 provides a housing seal, seals the filter media, at least in part, to the base frame 1444 and seals end cap structures 1446, 1448 to the base frame.

[0271] Support frame 1442 is substantially similar to support frame 1242 discussed previously. Preferably, the support frame 1442 is formed in a more fiat orientation and then folded into the A-shaped orientation of FIG. 44.

[0272] The first panel support 1450 includes a first engagement region 1470 that cooperates with a second engagement region 1471 of the second panel support 1452. In this example, the first and second engagement regions 1470, 1471 have a male-female configuration where engagement region 1470 is a female receiver that receives the male second engagement region 1471. The first engagement region includes side portions 1473 that form a slot that receives second engagement region 1471.

[0273] Adhesive, friction, welding, mechanically engaging nibs and slots or other means can be used to secure the second engagement region 1471 within the slot of the first engagement region 1470.

[0274] Again, while these engagement regions 1470, 1471 are provided by the central elongated segments 1465, they could be provided on more or different ones of the elongated segments

[0275] All references, including publications, patent applications, and patents cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein.

[0276] The use of the terms a and an and the and similar referents in the context of describing the invention (especially in the context of the following claims) is to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms comprising, having, including, and containing are to be construed as open-ended terms (i.e., meaning including, but not limited to,) unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., such as) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

[0277] Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.