WO2012067729A1 - Pleated filter element with tapering bend lines - Google Patents

Pleated filter element with tapering bend lines Download PDF

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Publication number
WO2012067729A1
WO2012067729A1 PCT/US2011/054924 US2011054924W WO2012067729A1 WO 2012067729 A1 WO2012067729 A1 WO 2012067729A1 US 2011054924 W US2011054924 W US 2011054924W WO 2012067729 A1 WO2012067729 A1 WO 2012067729A1
Authority
WO
WIPO (PCT)
Prior art keywords
channels
bend lines
filter element
subset
element according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2011/054924
Other languages
French (fr)
Inventor
Jerald J. Moy
Eric A. Janikowski
Kenneth M. Tofsland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cummins Filtration IP Inc
Original Assignee
Cummins Filtration IP Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cummins Filtration IP Inc filed Critical Cummins Filtration IP Inc
Priority to DE112011103785.6T priority Critical patent/DE112011103785B4/en
Priority to BR112012008427A priority patent/BR112012008427A2/en
Priority to CN201180005320.0A priority patent/CN102762270B/en
Priority to US13/273,551 priority patent/US8397920B2/en
Publication of WO2012067729A1 publication Critical patent/WO2012067729A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/001—Making filtering elements not provided for elsewhere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/22—Cell-type filters
    • B01D25/24—Cell-type roll filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/22—Cell-type filters
    • B01D25/26—Cell-type stack filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/012—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/522—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with specific folds, e.g. having different lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/525—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/12—Pleated filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/60—Shape of non-cylindrical filtering elements
    • B01D2201/602—Oval

Definitions

  • the invention relates to pleated filter elements.
  • Pleated filter elements are known in the prior art.
  • Filter media is pleated along a plurality of bend lines extending axially along an axial direction between an upstream inlet and a downstream outlet.
  • a plurality of wall segments extend in serpentine manner between the bend lines and define axial flow channels therebetween.
  • the channels have a height along a transverse direction which is perpendicular to the axial direction.
  • the channels have a lateral width along a lateral direction which is perpendicular to the axial direction and perpendicular to the transverse direction. Fluid is filtered by passing through the filter media wall segments from one channel to another.
  • FIG. 1 is a perspective view of a pleated filter element in accordance with the disclosure.
  • FIG. 2 is an enlarged perspective view of a pleated filter element in accordance with the disclosure.
  • Fig. 3 is like Fig. 1 and shows further construction of the pleated filter element from the inlet end.
  • Fig. 4 is like Fig. 1 and shows further construction of the pleated filter element from the outlet end.
  • FIG. 5 is an exploded perspective view showing a portion of a pleated filter element in accordance with the disclosure.
  • FIG. 6 is an enlarged perspective view showing a portion of a pleated filter element in accordance with the disclosure.
  • Fig. 7 is like Fig. 5 and is a view from the opposite end.
  • Fig. 8 is a perspective view showing one implementation of a pleated filter element in accordance with the disclosure.
  • FIG. 9 is a perspective view showing another implementation of a pleated filter element in accordance with the disclosure.
  • Fig. 10 is an end view showing another implementation of a pleated filter element in accordance with the disclosure.
  • Figs. 1-4 show a filter element 20 having an upstream inlet 22 receiving incoming dirty fluid as shown at arrows 23, and having a downstream outlet 24 discharging clean filtered fluid as shown at arrows 25.
  • the filter element is composed of filter media and is pleated along a plurality of bend lines 26.
  • the bend lines extend axially along an axial direction 28, Figs. 2-4, and include a first set of bend lines 30 extending from upstream inlet 22 towards downstream outlet 24, and a second set of bend lines 32 extending from downstream outlet 24 axially towards upstream inlet 22.
  • the filter element has a plurality of filter media wall segments 34 extending in serpentine manner between the bend lines.
  • the wall segments extend axially and define axial flow channels 36 therebetween.
  • the channels have a height 38 along a transverse direction 40, which transverse direction 40 is perpendicular to axial direction 28, Fig. 2.
  • the channels have a lateral width 42 along a lateral direction 44, which lateral direction 44 is perpendicular to axial direction 28 and perpendicular to transverse direction 40.
  • At least some of the noted bend lines taper in the noted transverse direction as they extend axially in the noted axial direction, to be described.
  • the wall segments include a first set of wall segments 46, Figs. 2, 3, alternately sealed to each other at upstream inlet 22, e.g. by adhesive 48 or the like, to define a first set of channels 50 having open upstream ends, and a second set of channels 52 interdigitated with the first set of channels and having closed upstream ends.
  • the wall segments include a second set of wall segments 54, Figs. 3, 4, alternately sealed to each other at downstream outlet 24, e.g. by adhesive 56 or the like, to define a third set of channels 58 having closed downstream ends, and a fourth set of channels 60, Fig. 4, having open downstream ends.
  • the first set of bend lines 30 includes a first subset of bend lines 62 defining the first set of channels 50, and a second subset of bend lines 64 defining the second set of channels 52.
  • the second subset of bend lines 64 taper in transverse direction 40 as they extend from upstream inlet 22 axially towards downstream outlet 24, Figs. 5-7.
  • the second set of bend lines 32 includes a third subset of bend lines 66 defining the third set of channels 58, and a fourth subset of bend lines 68 defining the fourth set of channels 60.
  • the fourth subset of bend lines 68 taper in the transverse direction 40 as they extend from downstream outlet 24 axially towards upstream inlet 22, Figs. 5-7.
  • the second set of channels 52 have a decreasing transverse channel height 38 along transverse direction 40 as the second set of channels 52 extend axially along axial direction 28 towards downstream outlet 24.
  • the tapering of the second subset of bend lines 64 in the transverse direction 40 provides the decreasing transverse channel height 38 of the second set of channels 52.
  • the fourth set of channels 60 have a decreasing transverse channel height along transverse direction 40 as the fourth set of channels 60 extend axially along axial direction 28 towards upstream inlet 22.
  • the tapering of the fourth subset of bend lines 68 in the transverse direction 40 provides the decreasing transverse channel height 38 of the fourth set of channels 60.
  • Incoming dirty fluid 23 to be filtered flows along axial direction 28 into open channels 50 at upstream inlet 22 and passes laterally and/or transversely through the filter media wall segments of the pleated filter element and then flows axially along axial direction 28 as clean filtered fluid 25 through open channels 60 at downstream outlet 24.
  • Second subset of bend lines 64 provides lateral cross-flow thereacross along lateral direction 44 between respective channels downstream of upstream inlet 22.
  • Fourth subset of bend lines 68 provides lateral cross- flow thereacross along lateral direction 44 between respective channels upstream of downstream outlet 24.
  • Second and fourth subsets of bend lines 64 and 68 have axially overlapping sections 70, and the noted lateral cross-flow is provided at least at axially overlapping sections 70.
  • the second subset of bend lines 64 taper to respective termination points 72, Figs. 5-7, providing at such temiination points the minimum transverse channel height 38 of the second set of channels 52.
  • the fourth subset of bend lines 68 taper to respective termination points 74 providing at such termination points the minimum transverse channel height 38 of the fourth set of channels 60.
  • Termination points 72 of second subset of bend lines 64 are axially downstream of termination points 74 of fourth subset of bend lines 68. This provides the noted axially overlapping sections 70.
  • Termination points 72 of second subset of bend lines 64 are at downstream outlet 24 in one embodiment, and in other embodiments are axially upstream of downstream outlet 24.
  • Termination points 74 of fourth subset of bend lines 68 are at upstream inlet 22 in one embodiment, and in other embodiments are axially downstream of upstream inlet 22.
  • First set of wall segments 46 alternately sealed to each other at adhesive 48 at upstream inlet 22 define a first set of tetrahedron channels 50 having open upstream ends, and a second set of tetrahedron channels 52 interdigitated with the first set of tetrahedron channels 50 and having closed upstream ends.
  • Second set of wall segments 54 alternately sealed to each other at adhesive 56 at downstream outlet 24 define a third set of tetrahedron channels 58 having closed downstream ends, and a fourth set of tetrahedron channels 60 interdigitated with the third set of tetrahedron channels 58 and having open downstream ends.
  • the first set of bend lines 30 includes the first subset of bend lines 62 defining the first set of tetrahedron channels 50, and the second subset of bend lines 64 defining the second set of tetrahedron channels 52.
  • the second subset of bend lines 64 taper in the transverse direction 40 as they extend from upstream inlet 22 axially towards downstream outlet 24.
  • the second set of bend lines 32 includes the third subset of bend lines 66 defining the third set of tetrahedron channels 58, and the fourth subset of bend lines 68 defining the fourth set of tetrahedron channels 60.
  • the fourth subset of bend lines 68 taper in the transverse direction 40 as they extend from downstream outlet 24 axially towards upstream inlet 22.
  • Each of the tetrahedron channels 50, 52, 58, 60 is elongated in the axial direction 28.
  • Each of the tetrahedron channels has a cross-sectional area along a cross-sectional plane defined by the transverse and lateral directions 40 and 44.
  • the cross-sectional areas of the first and second sets of tetrahedron channels 50 and 52 decrease as the first and second sets of tetrahedron channels 50 and 52 extend along axial direction 28 from upstream inlet 22 toward downstream outlet 24.
  • cross- sectional areas of third and fourth sets of tetrahedron channels 58 and 60 decrease as the third and fourth sets of tetrahedron channels 58 and 60 extend along axial direction 28 from downstream outlet 24 toward upstream inlet 22.
  • bend lines 26 are bent at a sharp pointed angle, as shown at 80, Fig. 2. In other embodiments, the bend lines are rounded along a given radius, as shown in dashed line at 82, Fig. 2.
  • the filter element is further provided with a substantially fiat sheet 84 extending laterally across the bend lines.
  • the sheet is formed of filter media material, which may be the same filter media material as the pleated filter element including wall segments 34.
  • Sheet 84 extends axially along the full axial length along axial direction 28 between upstream inlet 22 and downstream outlet 24, and extends laterally along the full lateral width along lateral direction 44 across and sealing the channels to prevent bypass of dirty upstream air to clean downstream air without passing through and being filtered by a wall segment 34.
  • sheet 84 is rectiplanar along a plane defined by axial direction 28 and lateral direction 44.
  • sheet 84 is slightly corrugated, as shown in dashed line at 86, Fig.
  • sheet 84 is rolled with the filter element into a closed loop, and in various embodiments the closed loop has a shape selected from the group of circular, Fig. 8, racetrack, Fig. 9, oval, oblong, and other closed-loop shapes.
  • a plurality of pleated filter elements and sheets are stacked upon each other in a stacked panel arrangement, Figs. 10-12. Spacer strips or embossments such as 88 may be used as needed for spacing and support between stacked elements.
  • Figs. 13-15 show a further embodiment eliminating sheet 84 and are like Figs. 5-7 and use like reference numerals from above where appropriate to facilitate understanding.
  • the filter element of Figs. 13-15 has an upstream inlet 22 receiving incoming dirty fluid, and a downstream outlet 24 discharging clean filtered fluid.
  • the wall segments are alternately sealed to each other at upstream inlet 22 as above, e.g. by adhesive or a section of filter media at 48, to define the noted first set of channels 50 having open upstream ends, and the noted second set of channels 52 interdigitated with the first set of channels and having closed upstream ends.
  • the wall segments are alternately sealed to each other at downstream outlet 24, e.g.
  • the bend lines include the noted first subset of bend lines 62 defining the first set of channels 50, and the noted second subset of bend lines 64 defining the noted second set of channels 52, and the noted third subset of bend lines 66 defining the third set of channels 58, and the noted fourth subset of bend lines 68 defining the noted fourth set of channels 60.
  • the elongated tetrahedron channels allow for cross-flow between adjacent channels. In air filter implementations, this cross-flow allows for more even dust loading on the upstream side of the media.
  • the elongated tetrahedron channels are shaped to purposely allow for more upstream void volume than downstream void volume, to increase filter capacity.
  • Various fluids may be filtered, including air or other gases, and including liquids.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A pleated filter element extends axially between an upstream inlet and a downstream outlet along a plurality of axially extending bend lines forming axial flow channels. The bend lines taper in a transverse direction and define a plurality of axially elongated tetrahedron channels facing oppositely to each other.

Description

PLEATED FILTER ELEMENT WITH TAPERING BEND LINES
Inventorship: Jerald J. Moy
Eric A. Janikowski
Kenneth M. Tofsland
Atty. Docket: 4191-00771
Address for Correspondence:
ANDRUS, SCEALES, STARKE & SAWALL 100 East Wisconsin Avenue, Suite 1100 Milwaukee, WI 53202
Phone: (414) 271-7590
Fax: (414) 271-5770 PLEATED FILTER ELEMENT WITH TAPERING BEND LINES
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] This application claims the benefit of and priority from Provisional U.S. Patent Application No. 61/414,235, filed November 16, 2010, incorporated herein by reference.
BACKGROUND AND SUMMARY
[0002] The invention relates to pleated filter elements.
[0003] Pleated filter elements are known in the prior art. Filter media is pleated along a plurality of bend lines extending axially along an axial direction between an upstream inlet and a downstream outlet. A plurality of wall segments extend in serpentine manner between the bend lines and define axial flow channels therebetween. The channels have a height along a transverse direction which is perpendicular to the axial direction. The channels have a lateral width along a lateral direction which is perpendicular to the axial direction and perpendicular to the transverse direction. Fluid is filtered by passing through the filter media wall segments from one channel to another.
[0004] The present disclosure arose during continuing development efforts in the above technology.
.ΙΜ Ι Γ i k v_ ivi r 1 1 ν . ν r ι π π υι Α νν ιι\ ν_κ->
[0005] Fig. 1 is a perspective view of a pleated filter element in accordance with the disclosure.
[0006] Fig. 2 is an enlarged perspective view of a pleated filter element in accordance with the disclosure.
[0007] Fig. 3 is like Fig. 1 and shows further construction of the pleated filter element from the inlet end.
[0008] Fig. 4 is like Fig. 1 and shows further construction of the pleated filter element from the outlet end.
[0009] Fig. 5 is an exploded perspective view showing a portion of a pleated filter element in accordance with the disclosure.
[0010] Fig. 6 is an enlarged perspective view showing a portion of a pleated filter element in accordance with the disclosure.
[0011] Fig. 7 is like Fig. 5 and is a view from the opposite end.
[0012] Fig. 8 is a perspective view showing one implementation of a pleated filter element in accordance with the disclosure.
[0013] Fig. 9 is a perspective view showing another implementation of a pleated filter element in accordance with the disclosure.
[0014] Fig. 10 is an end view showing another implementation of a pleated filter element in accordance with the disclosure.
[0015] Fig,
[0016] Fig,
[0017] Fig,
[0018] Fig,
[0019] Fig.
DETAILED DESCRIPTION
[0020] Figs. 1-4 show a filter element 20 having an upstream inlet 22 receiving incoming dirty fluid as shown at arrows 23, and having a downstream outlet 24 discharging clean filtered fluid as shown at arrows 25. The filter element is composed of filter media and is pleated along a plurality of bend lines 26. The bend lines extend axially along an axial direction 28, Figs. 2-4, and include a first set of bend lines 30 extending from upstream inlet 22 towards downstream outlet 24, and a second set of bend lines 32 extending from downstream outlet 24 axially towards upstream inlet 22. The filter element has a plurality of filter media wall segments 34 extending in serpentine manner between the bend lines. The wall segments extend axially and define axial flow channels 36 therebetween. The channels have a height 38 along a transverse direction 40, which transverse direction 40 is perpendicular to axial direction 28, Fig. 2. The channels have a lateral width 42 along a lateral direction 44, which lateral direction 44 is perpendicular to axial direction 28 and perpendicular to transverse direction 40. At least some of the noted bend lines taper in the noted transverse direction as they extend axially in the noted axial direction, to be described.
[0021] The wall segments include a first set of wall segments 46, Figs. 2, 3, alternately sealed to each other at upstream inlet 22, e.g. by adhesive 48 or the like, to define a first set of channels 50 having open upstream ends, and a second set of channels 52 interdigitated with the first set of channels and having closed upstream ends. The wall segments include a second set of wall segments 54, Figs. 3, 4, alternately sealed to each other at downstream outlet 24, e.g. by adhesive 56 or the like, to define a third set of channels 58 having closed downstream ends, and a fourth set of channels 60, Fig. 4, having open downstream ends. The first set of bend lines 30 includes a first subset of bend lines 62 defining the first set of channels 50, and a second subset of bend lines 64 defining the second set of channels 52. The second subset of bend lines 64 taper in transverse direction 40 as they extend from upstream inlet 22 axially towards downstream outlet 24, Figs. 5-7. The second set of bend lines 32 includes a third subset of bend lines 66 defining the third set of channels 58, and a fourth subset of bend lines 68 defining the fourth set of channels 60. The fourth subset of bend lines 68 taper in the transverse direction 40 as they extend from downstream outlet 24 axially towards upstream inlet 22, Figs. 5-7. The second set of channels 52 have a decreasing transverse channel height 38 along transverse direction 40 as the second set of channels 52 extend axially along axial direction 28 towards downstream outlet 24. The tapering of the second subset of bend lines 64 in the transverse direction 40 provides the decreasing transverse channel height 38 of the second set of channels 52. The fourth set of channels 60 have a decreasing transverse channel height along transverse direction 40 as the fourth set of channels 60 extend axially along axial direction 28 towards upstream inlet 22. The tapering of the fourth subset of bend lines 68 in the transverse direction 40 provides the decreasing transverse channel height 38 of the fourth set of channels 60.
[0022] Incoming dirty fluid 23 to be filtered flows along axial direction 28 into open channels 50 at upstream inlet 22 and passes laterally and/or transversely through the filter media wall segments of the pleated filter element and then flows axially along axial direction 28 as clean filtered fluid 25 through open channels 60 at downstream outlet 24. Second subset of bend lines 64 provides lateral cross-flow thereacross along lateral direction 44 between respective channels downstream of upstream inlet 22. Fourth subset of bend lines 68 provides lateral cross- flow thereacross along lateral direction 44 between respective channels upstream of downstream outlet 24. Second and fourth subsets of bend lines 64 and 68 have axially overlapping sections 70, and the noted lateral cross-flow is provided at least at axially overlapping sections 70.
[0023] The second subset of bend lines 64 taper to respective termination points 72, Figs. 5-7, providing at such temiination points the minimum transverse channel height 38 of the second set of channels 52. The fourth subset of bend lines 68 taper to respective termination points 74 providing at such termination points the minimum transverse channel height 38 of the fourth set of channels 60. Termination points 72 of second subset of bend lines 64 are axially downstream of termination points 74 of fourth subset of bend lines 68. This provides the noted axially overlapping sections 70. Termination points 72 of second subset of bend lines 64 are at downstream outlet 24 in one embodiment, and in other embodiments are axially upstream of downstream outlet 24. Termination points 74 of fourth subset of bend lines 68 are at upstream inlet 22 in one embodiment, and in other embodiments are axially downstream of upstream inlet 22.
[0024] First set of wall segments 46 alternately sealed to each other at adhesive 48 at upstream inlet 22 define a first set of tetrahedron channels 50 having open upstream ends, and a second set of tetrahedron channels 52 interdigitated with the first set of tetrahedron channels 50 and having closed upstream ends. Second set of wall segments 54 alternately sealed to each other at adhesive 56 at downstream outlet 24 define a third set of tetrahedron channels 58 having closed downstream ends, and a fourth set of tetrahedron channels 60 interdigitated with the third set of tetrahedron channels 58 and having open downstream ends. The first set of bend lines 30 includes the first subset of bend lines 62 defining the first set of tetrahedron channels 50, and the second subset of bend lines 64 defining the second set of tetrahedron channels 52. The second subset of bend lines 64 taper in the transverse direction 40 as they extend from upstream inlet 22 axially towards downstream outlet 24. The second set of bend lines 32 includes the third subset of bend lines 66 defining the third set of tetrahedron channels 58, and the fourth subset of bend lines 68 defining the fourth set of tetrahedron channels 60. The fourth subset of bend lines 68 taper in the transverse direction 40 as they extend from downstream outlet 24 axially towards upstream inlet 22.
[0025] First and second sets of tetrahedron channels 50 and 52, Figs. 3-7, face oppositely to third and fourth sets of tetrahedron channels 58 and 60. Each of the tetrahedron channels 50, 52, 58, 60 is elongated in the axial direction 28. Each of the tetrahedron channels has a cross-sectional area along a cross-sectional plane defined by the transverse and lateral directions 40 and 44. The cross-sectional areas of the first and second sets of tetrahedron channels 50 and 52 decrease as the first and second sets of tetrahedron channels 50 and 52 extend along axial direction 28 from upstream inlet 22 toward downstream outlet 24. The cross- sectional areas of third and fourth sets of tetrahedron channels 58 and 60 decrease as the third and fourth sets of tetrahedron channels 58 and 60 extend along axial direction 28 from downstream outlet 24 toward upstream inlet 22. In one embodiment, bend lines 26 are bent at a sharp pointed angle, as shown at 80, Fig. 2. In other embodiments, the bend lines are rounded along a given radius, as shown in dashed line at 82, Fig. 2.
[0026] The filter element is further provided with a substantially fiat sheet 84 extending laterally across the bend lines. In one embodiment, the sheet is formed of filter media material, which may be the same filter media material as the pleated filter element including wall segments 34. Sheet 84 extends axially along the full axial length along axial direction 28 between upstream inlet 22 and downstream outlet 24, and extends laterally along the full lateral width along lateral direction 44 across and sealing the channels to prevent bypass of dirty upstream air to clean downstream air without passing through and being filtered by a wall segment 34. In one embodiment, sheet 84 is rectiplanar along a plane defined by axial direction 28 and lateral direction 44. In another embodiment, sheet 84 is slightly corrugated, as shown in dashed line at 86, Fig. 5. In one implementation, sheet 84 is rolled with the filter element into a closed loop, and in various embodiments the closed loop has a shape selected from the group of circular, Fig. 8, racetrack, Fig. 9, oval, oblong, and other closed-loop shapes. In other embodiments, a plurality of pleated filter elements and sheets are stacked upon each other in a stacked panel arrangement, Figs. 10-12. Spacer strips or embossments such as 88 may be used as needed for spacing and support between stacked elements.
[0027] Figs. 13-15 show a further embodiment eliminating sheet 84 and are like Figs. 5-7 and use like reference numerals from above where appropriate to facilitate understanding. The filter element of Figs. 13-15 has an upstream inlet 22 receiving incoming dirty fluid, and a downstream outlet 24 discharging clean filtered fluid. The wall segments are alternately sealed to each other at upstream inlet 22 as above, e.g. by adhesive or a section of filter media at 48, to define the noted first set of channels 50 having open upstream ends, and the noted second set of channels 52 interdigitated with the first set of channels and having closed upstream ends. The wall segments are alternately sealed to each other at downstream outlet 24, e.g. by adhesive or a section of filter media at 56, to define the noted third set of channels 58 having closed downstream ends, and the noted fourth set of channels 60 having open downstream ends. The bend lines include the noted first subset of bend lines 62 defining the first set of channels 50, and the noted second subset of bend lines 64 defining the noted second set of channels 52, and the noted third subset of bend lines 66 defining the third set of channels 58, and the noted fourth subset of bend lines 68 defining the noted fourth set of channels 60.
[0028] The elongated tetrahedron channels allow for cross-flow between adjacent channels. In air filter implementations, this cross-flow allows for more even dust loading on the upstream side of the media. In one embodiment, the elongated tetrahedron channels are shaped to purposely allow for more upstream void volume than downstream void volume, to increase filter capacity. Various fluids may be filtered, including air or other gases, and including liquids.
[0029] In the foregoing description, certain terms have been used for brevity, clearness, and understanding. No unnecessary limitations are to be inferred therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed. The different configurations, systems, and method steps described herein may be used alone or in combination with other configurations, systems and method steps. It is to be expected that various equivalents, alternatives and modifications are possible within the scope of the appended claims. Each limitation in the appended claims is intended to invoke interpretation under 35 U.S.C. §1 12, sixth paragraph, only if the terms "means for" or "step for" are explicitly recited in the respective limitation.

Claims

CLAIMS What is claimed is:
1. A filter element having an upstream inlet and a downstream outlet and pleated along a plurality of bend lines, said bend lines extending axially along an axial direction and comprising a first set of bend lines extending from said upstream inlet axially towards said downstream outlet, and a second set of bend lines extending from said downstream outlet axially towards said upstream inlet, said filter element having a plurality of wall segments extending in serpentine manner between said bend lines, said wall segments extending axially and defining axial channels therebetween, said channels having a height along a transverse direction, said transverse direction being perpendicular to said axial direction, said channels having a lateral width along a lateral direction, said lateral direction being perpendicular to said axial direction and perpendicular to said transverse direction, at least some of said bend lines tapering in said transverse direction as they extend axially in said axial direction.
2. The filter element according to claim 1 wherein said wall segments comprise a first set of wall segments alternately sealed to each other at said upstream inlet to define a first set of channels having open upstream ends, and a second set of channels interdigitated with said first set of channels and having closed upstream ends, said wall segments comprise a second set of wall segments alternately sealed to each other at said downstream outlet to define a third set of channels having closed downstream ends, and a fourth set of channels interdigitated with said third set of channels and having open downstream ends, said first set of bend lines comprising a first subset of bend lines defining said first set of channels, and a second subset of bend lines defining said second set of channels, said second subset of bend lines tapering in said transverse direction as they extend from said upstream inlet axially towards said downstream outlet, said second set of bend lines comprising a third subset of bend lines defining said third set of channels, and a fourth subset of bend lines defining said fourth set of channels, said fourth subset of bend lines tapering in said transverse direction as they extend from said downstream outlet axially towards said upstream inlet.
3. The filter element according to claim 2 wherein:
said second set of channels have a decreasing transverse channel height along said transverse direction as said second set of channels extend axially towards said downstream outlet;
said tapering of said second subset of bend lines in said transverse direction provides said decreasing transverse channel height of said second set of channels;
said fourth set of channels have a decreasing transverse channel height along said transverse direction as said fourth set of channels extend axially towards said upstream inlet;
said tapering of said fourth subset of bend lines in said transverse direction provides said decreasing transverse channel height of said fourth set of channels.
4. The filter element according to claim 3 wherein said second subset of bend lines provides lateral cross-flow thereacross along said lateral direction between respective charmels downstream of said upstream inlet.
5. The filter element according to claim 3 wherein said fourth subset of bend lines provides lateral cross-flow thereacross along said lateral direction between respective channels upstream of said downstream outlet.
6. The filter element according to claim 3 wherein said second and fourth subsets of bend lines provide lateral cross-flow thereacross along said lateral direction between respective channels downstream of said upstream inlet and upstream of said downstream outlet.
7. The filter element according to claim 6 wherein said second and fourth subsets of bend lines have axially overlapping sections, and wherein said lateral cross-flow is provided at least at said axially overlapping sections.
8. The filter element according to claim 3 wherein:
said second subset of bend lines taper to respective termination points providing minimum transverse channel height of said second set of channels;
said fourth subset of bend lines taper to respective termination points providing minimum transverse channel height of said fourth set of channels;
said termination points of said second subset of bend lines are axially downstream of said termination points of said fourth subset of bend lines.
9. The filter element according to claim 8 wherein:
said termination points of said second subset of bend lines are at or axially upstream of said downstream outlet;
said termination points of said fourth subset of bend lines are at or axially downstream of said upstream inlet.
10. A filter element having an upstream inlet and a downstream outlet and pleated along a plurality of bend lines, said bend lines extending axially along an axial direction and comprising a first set of bend lines extending from said upstream inlet axially towards said downstream outlet, and a second set of bend lines extending from said downstream outlet axially towards said upstream inlet, said filter element having a plurality of wall segments extending in serpentine manner between said bend lines, said wall segments extending axially and defining axial channels therebetween, said channels having a height along a transverse direction, said transverse direction being perpendicular to said axial direction, said channels having a lateral width along a lateral direction, said lateral direction being perpendicular to said axial direction and perpendicular to said transverse direction, at least some of said bend lines tapering in said transverse direction as they extend axially in said axial direction, said wall segments comprising a first set of wall segments alternately sealed to each other at said upstream inlet to define a first set of tetrahedron channels having open upstream ends, and a second set of tetrahedron channels interdigitated with said first set of tetrahedron channels and having closed upstream ends, said wall segments comprising a second set of wall segments alternately sealed to each other at said downstream outlet to define a third set of tetrahedron channels having closed downstream ends, and a fourth set of tetrahedron channels interdigitated with said third set of tetrahedron channels and having open downstream ends, said first set of bend lines comprising a first subset of bend lines defining said first set of tetrahedron channels, and a second subset of bend lines defining said second set of tetrahedron channels, said second subset of bend lines tapering in said transverse direction as they extend from said upstream inlet axially towards said downstream outlet, said second set of bend lines comprising a third subset of bend lines defining said third set of tetrahedron channels, and a fourth subset of bend lines defining said fourth set of tetrahedron channels, said fourth subset of bend lines tapering in said transverse direction as they extend from said downstream outlet axially towards said upstream inlet.
1 1. The filter element according to claim 10 wherein said first and second sets of tetrahedrons channels face oppositely to said third and fourth sets of tetrahedron channels.
12. The filter element according to claim 1 1 wherein each of said tetrahedron channels is elongated in said axial direction.
13. The filter element according to claim 12 wherein each of said tetrahedron channels has a cross-sectional area along a cross-sectional plane defined by said transverse and lateral directions, and wherein:
the cross-sectional areas of said first and second sets of tetrahedron channels decrease as said first and second sets of tetrahedron channels extend along said axial direction from said upstream inlet toward said downstream outlet;
the cross-sectional areas of said third and fourth sets of tetrahedron channels decrease as said third and fourth sets of tetrahedron channels extend along said axial direction from said downstream outlet toward said upstream inlet.
14. The filter element according to claim 10 wherein said bend lines are bent at a sharp pointed angle.
15. The filter element according to claim 10 wherein said bend lines are rounded along a given radius.
16. The filter element according to claim 10 further comprising a substantially flat sheet extending laterally across said bend lines.
17. The filter element according to claim 16 wherein said sheet is composed of filter material.
18. The filter element according to claim 17 wherein said wall segments and said sheet are composed of the same filter material.
19. The filter element according to claim 16 wherein said sheet extends axially along the full axial length between said upstream inlet and said downstream outlet.
20. The filter element according to claim 19 wherein said sheet is rectiplanar.
21. The filter element according to claim 19 wherein said sheet is slightly corrugated.
22. The filter element according to claim 16 wherein said sheet is rolled with said filter element into a closed loop.
23. The filter element according to claim 22 wherein said closed loop has a shape selected from the group consisting of circular, racetrack, oval, oblong.
24. The filter element according to claim 16 comprising a plurality of said pleated filter elements and sheets stacked upon each other in a stacked panel arrangement.
PCT/US2011/054924 2010-11-16 2011-10-05 Pleated filter element with tapering bend lines Ceased WO2012067729A1 (en)

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DE112011103785.6T DE112011103785B4 (en) 2010-11-16 2011-10-05 Pleated filter elements with tapered bending lines
BR112012008427A BR112012008427A2 (en) 2010-11-16 2011-10-05 filter elements
CN201180005320.0A CN102762270B (en) 2010-11-16 2011-10-05 Pleated filter elements with gradually inclined bend lines
US13/273,551 US8397920B2 (en) 2010-11-16 2011-10-14 Pleated filter element with tapering bend lines

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US41423510P 2010-11-16 2010-11-16
US61/414,235 2010-11-16
US201113240088A 2011-09-22 2011-09-22
US13/240,088 2011-09-22

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9084957B2 (en) 2008-07-25 2015-07-21 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
EP2528675B1 (en) * 2010-01-25 2018-04-18 Donaldson Company, Inc. Pleated filtration media having tapered flutes
EP3529111A4 (en) * 2016-10-20 2020-08-19 Cummins Filtration IP, Inc. INTERRUPTED DIRECTIONAL EMBOSSING OF FLAT SHEET
US11298645B2 (en) 2007-06-26 2022-04-12 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US11376541B2 (en) 2016-12-15 2022-07-05 Cummins Filtration Ip, Inc. Tetrahedral filter media
US11612845B2 (en) 2007-02-02 2023-03-28 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US12569797B2 (en) 2019-12-09 2026-03-10 Cummins Filtration Inc. Formed filter media

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7396376B2 (en) 2003-12-22 2008-07-08 Donaldson Company, Inc. Seal arrangement for filter element; filter element assembly; and, methods
EP1748831B1 (en) 2004-04-30 2012-06-13 Donaldson Company, Inc. Filter assemblies and method
EP2243536B1 (en) 2004-06-14 2013-11-20 Donaldson Company, Inc. Air filter arrangement and cartridge
WO2006017790A1 (en) 2004-08-06 2006-02-16 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
EP1838414B1 (en) 2005-01-13 2012-03-07 Donaldson Company, Inc. Air filter arrangement
WO2007044677A1 (en) 2005-10-11 2007-04-19 Donaldson Company, Inc. Air filter arrangement; assembly; and, methods
EP2134444B1 (en) 2007-02-26 2018-06-20 Donaldson Company, Inc. Air filter cartridge
MX2010008530A (en) 2008-02-04 2010-08-30 Donaldson Co Inc Method and apparatus for forming fluted filtration media.
JP5711230B2 (en) 2009-08-03 2015-04-30 ドナルドソン カンパニー，インコーポレイティド Method and apparatus for forming fluted filtration media having tapered flutes
DE112015004116B4 (en) * 2014-09-09 2024-02-01 Cummins Filtration Ip, Inc. Axial flow air filter element, filter system and filter system maintenance procedures
US10315147B2 (en) 2014-09-15 2019-06-11 Donaldson Company, Inc. Filter cartridges; air cleaner assemblies; housings; features; components; and, methods
US9752541B2 (en) * 2014-12-05 2017-09-05 Caterpillar Inc. Filter media
DE112016004052T5 (en) 2015-10-12 2018-05-24 Cummins Filtration Ip, Inc. Tangentialluftreiniger with wound filter cartridge
USRE50860E1 (en) 2015-12-11 2026-04-14 Atmus Filtration IP Inc. Filter with variable cross-section axial seal
WO2017106295A1 (en) 2015-12-15 2017-06-22 Cummins Filtration Sarl Filter element with endcap having rigid reinforcing member
CN109069956A (en) 2016-04-18 2018-12-21 康明斯过滤Ip公司 Nanofiber Filtration Media for High Performance Applications
US11141687B2 (en) 2016-05-02 2021-10-12 Cummins Filtration Ip, Inc. Filter with interlocking housing interface
CN109414640B (en) * 2016-07-13 2021-10-08 康明斯过滤Ip公司 Filter element with tapered perimeter
CN106593255B (en) * 2017-01-11 2018-05-08 显利(珠海)造船有限公司 Dedusting shutter peculiar to vessel
US11446598B2 (en) 2017-06-20 2022-09-20 Cummins Filtration Ip, Inc. Axial flow centrifugal separator
US11192055B2 (en) 2017-08-30 2021-12-07 Cummins Filtration Ip, Inc. Interlock for genuine filter recognition
WO2019060904A2 (en) 2017-09-25 2019-03-28 Donaldson Company, Inc. FILTER SET
US11498022B2 (en) 2017-12-08 2022-11-15 Cummins Filtration Ip, Inc. Oval seal with stabilization contour
FR3078490B1 (en) 2018-03-05 2022-10-14 Cummins Filtration Sarl FILTERING ELEMENT AND HOUSING HAVING NON-CIRCULAR CROSS-SECTIONS
US10918978B2 (en) 2018-05-08 2021-02-16 Cummins Filtration Ip, Inc. Oval filter with exterior elliptical radial seal and internal support structure
USD884866S1 (en) 2018-05-08 2020-05-19 Cummins Filtration Ip, Inc. Filter element
CN116272183B (en) 2018-06-11 2025-06-27 唐纳森公司 Filter medium, filter medium pack and filter element
WO2020112536A1 (en) 2018-11-28 2020-06-04 Cummins Filtration Ip, Inc. Curved seal on filter element and protective seal mold
CN113329804B (en) 2018-11-29 2023-01-17 康明斯滤清系统知识产权公司 Improved hierarchical filter framework
CN116785856A (en) 2019-03-27 2023-09-22 唐纳森公司 Particle separator filter with axially extending flow surfaces
WO2020231769A1 (en) 2019-05-14 2020-11-19 Cummins Filtration Ip, Inc. Curved lobed seal lock air filter system
CN114007717B (en) * 2019-06-28 2024-04-26 康明斯滤清系统知识产权公司 Utilizes full cross-section filter components
CN114222618B (en) 2019-08-23 2024-05-24 康明斯滤清系统知识产权公司 Filter assemblies and elements using multi-layer and spiral wound filter media
EP4031264A4 (en) 2019-09-20 2023-11-01 Cummins Filtration IP, Inc. FILTER ELEMENT WITH AUTONOMOUS ELECTROSTATIC ACCUMULATION PROTECTION
WO2021127130A1 (en) 2019-12-18 2021-06-24 Cummins Filtration Inc. Protuberant compressible filter seal design utilizing undercuts
CN114845794B (en) 2019-12-26 2024-07-12 康明斯过滤股份有限公司 Filter element with flow-conducting permeable layer
USD969289S1 (en) 2020-03-05 2022-11-08 Cummins Filtration Inc. Filter element
US20230264130A1 (en) 2020-07-27 2023-08-24 Cummins Filtration Inc. Filter assembly with reuleaux sealing interface
CN116194186B (en) 2020-10-06 2026-03-31 安美世滤清系统公司 Filter components with unique shapes
CN112220462A (en) * 2020-10-23 2021-01-15 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 A neonatal incubator
US20220134259A1 (en) * 2020-11-04 2022-05-05 Fluid Handling Llc Coalescing media for hydronic air and sediment separation device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3293833A (en) * 1963-02-28 1966-12-27 Cambridge Filter Corp Pleated filter
US3921432A (en) * 1975-03-24 1975-11-25 American Air Filter Co Method of forming a tapered pleated filter pleat fold separator and a separator formed thereby
US4925561A (en) * 1988-03-31 1990-05-15 Tsuchiya Mfg. Co., Ltd. Composite planar and triangularly pleated filter element
US5814117A (en) * 1995-10-30 1998-09-29 Going Tokyo Co., Ltd. Filter element for air cleaner for engine
US6238561B1 (en) * 1999-09-24 2001-05-29 Nelson Industries, Inc. Corrugated axial filter with simple fold pattern and method of making it
US7488365B2 (en) * 2001-12-03 2009-02-10 Donaldson Company, Inc. Filter element using corrugated media sheet

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410062A (en) 1966-09-12 1968-11-12 Cambridge Filter Corp Filter
GB2131717A (en) 1982-11-15 1984-06-27 Atomic Energy Authority Uk Air filter
DE69512713T2 (en) 1994-07-12 2000-03-09 Nittetsu Mining Co. Ltd. Reinforced filter element
US6000685A (en) 1998-06-29 1999-12-14 Catalytic Distillation Technologies Gas/liquid contact structure
US6391076B1 (en) 1999-01-29 2002-05-21 Nelson Industries, Inc. Full flow filter
US6273938B1 (en) 1999-08-13 2001-08-14 3M Innovative Properties Company Channel flow filter
US6544310B2 (en) 2001-05-24 2003-04-08 Fleetguard, Inc. Exhaust aftertreatment filter with particulate distribution pattern
US7323105B1 (en) 2004-08-11 2008-01-29 Fleetguard, Inc. High capacity direct flow filter with maintained channel width
US20060272305A1 (en) 2005-06-06 2006-12-07 Morgan Jeffrey S Channel filter
US20080011673A1 (en) 2005-09-01 2008-01-17 Janikowski Eric A Modified Direct Flow Filter
US7323106B2 (en) 2005-09-01 2008-01-29 Fleetguard, Inc. Multi-element filter with multiple pleat channel height
US7314558B1 (en) 2005-09-01 2008-01-01 Fleetguard, Inc. Pleated panel fluid filter
US7648546B2 (en) 2006-01-06 2010-01-19 Cummins Filtration Ip Inc. Filter with variable pleat depth
US7588619B2 (en) 2006-11-28 2009-09-15 Wix Filtration Corp. Cross-flow filter media and filter assembly
CA2787822A1 (en) 2010-01-25 2011-07-28 Donaldson Company, Inc. Pleated filtration media having tapered flutes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3293833A (en) * 1963-02-28 1966-12-27 Cambridge Filter Corp Pleated filter
US3921432A (en) * 1975-03-24 1975-11-25 American Air Filter Co Method of forming a tapered pleated filter pleat fold separator and a separator formed thereby
US4925561A (en) * 1988-03-31 1990-05-15 Tsuchiya Mfg. Co., Ltd. Composite planar and triangularly pleated filter element
US5814117A (en) * 1995-10-30 1998-09-29 Going Tokyo Co., Ltd. Filter element for air cleaner for engine
US6238561B1 (en) * 1999-09-24 2001-05-29 Nelson Industries, Inc. Corrugated axial filter with simple fold pattern and method of making it
US7488365B2 (en) * 2001-12-03 2009-02-10 Donaldson Company, Inc. Filter element using corrugated media sheet

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11612845B2 (en) 2007-02-02 2023-03-28 Donaldson Company, Inc. Air filtration media pack, filter element, air filtration media, and methods
US11298645B2 (en) 2007-06-26 2022-04-12 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US12017177B2 (en) 2007-06-26 2024-06-25 Donaldson Company, Inc. Filtration media pack, filter element, and methods
US9084957B2 (en) 2008-07-25 2015-07-21 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
US12048888B2 (en) 2008-07-25 2024-07-30 Donaldson Company, Inc. Pleated filtration media, media packs, filter elements, and methods for filtering fluids
EP2528675B1 (en) * 2010-01-25 2018-04-18 Donaldson Company, Inc. Pleated filtration media having tapered flutes
US10058812B2 (en) 2010-01-25 2018-08-28 Donaldson Company, Inc. Pleated filtration media having tapered flutes
US11413563B2 (en) 2010-01-25 2022-08-16 Donaldson Company, Inc. Pleated filtration media having tapered flutes
EP3529111A4 (en) * 2016-10-20 2020-08-19 Cummins Filtration IP, Inc. INTERRUPTED DIRECTIONAL EMBOSSING OF FLAT SHEET
US11865488B2 (en) 2016-10-20 2024-01-09 Cummins Filtration Ip, Inc. Interrupted, directional emboss of flat sheet
US11439943B2 (en) 2016-10-20 2022-09-13 Cummins Filtration Ip, Inc. Interrupted, directional emboss of flat sheet
US11376541B2 (en) 2016-12-15 2022-07-05 Cummins Filtration Ip, Inc. Tetrahedral filter media
US12569797B2 (en) 2019-12-09 2026-03-10 Cummins Filtration Inc. Formed filter media

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US20120118814A1 (en) 2012-05-17
CN102762270B (en) 2015-01-14
DE112011103785T5 (en) 2013-08-22
CN104689616B (en) 2016-08-24
CN102762270A (en) 2012-10-31
DE112011103785B4 (en) 2022-06-23
CN104689616A (en) 2015-06-10
BR112012008427A2 (en) 2018-06-05
US8397920B2 (en) 2013-03-19

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