WO1999022841A1 - Disposable filter element - Google Patents
Disposable filter element Download PDFInfo
- Publication number
- WO1999022841A1 WO1999022841A1 PCT/US1998/023374 US9823374W WO9922841A1 WO 1999022841 A1 WO1999022841 A1 WO 1999022841A1 US 9823374 W US9823374 W US 9823374W WO 9922841 A1 WO9922841 A1 WO 9922841A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter element
- permanent
- tube
- filter
- media
- Prior art date
Links
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000004743 Polypropylene Substances 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229920002457 flexible plastic Polymers 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
- B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
-
- 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
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
Definitions
- Most hydraulic filters comprise a housing that can withstand the pressures in the hydraulic system with a filter element of the pleated media type inserted within the housing.
- Filter elements must be designed to resist collapse under the pressure drop that develops across them as the filter media becomes contaminated. Since most hydraulic filter elements are tubular with flow of fluid passing radially inward to a central outlet passage, they are provided with a perforated tubular steel core to support the media from collapse.
- the filter elements have typically been supplied as a canister with the pleated filter media positioned around the tubular steel center tube. Once the media has become contaminated beyond use, the entire canister is replaced in the housing.
- Another type of filter system has a permanent perforated tubular core so that the filter element may be "coreless". See, for example, U.S. Patents Nos . 4,218,324 and 5,476,585.
- the advantage of this system is that the filter element can be easily disposed of by crushing or burning .
- a filter element for use with a permanent perforated core .
- the filter element comprises a rigid resin mesh tube having a thickness of at least 0.050 inch with an inner diameter enabling a sliding fit over the permanent core, a pleated filter media folded in a tubular shape abutting the rigid resin mesh tubing, an exterior mesh wrapped about the pleated filter media, end caps secured to the axial ends of the rigid resin mesh tube and the pleated media, and means for sealing the end caps to the permanent perforated core.
- Fig. 1 is a section view of a filter element according to this invention
- Fig. 2 is an end view of a filter element according to this invention.
- Fig. 3 is a graph illustrating the forces needed to remove prior art filter elements and filter elements according to this invention from permanent perforated cores .
- the 10 is provided with a rigid mesh tube 16 that has a thickness of .063 inch and an open area of about 36 percent.
- the tube is made of polypropylene as the primary resin. Other resins may be included, for example, PE, HDPE, LDPE, LLDPE and EVA.
- the tube may be easily crushed when compacted across a diameter and would have insufficient strength to support the filter media m the absence of the permanent perforated core.
- the tube has a plurality of circumferential strands that lie in a plane that is perpendicular to the axis of the tube.
- the pleated filter media 12 may be paper or glass fiber sheets sandwiched between flexible plastic mesh.
- the exterior of the filter element is wrapped with a flexible plastic net 14 which may be secured by a hot melt plastic bead laid over the exterior surface of the filter element in a helical pattern.
- an end piece 18, 20 is Attached to one end piece.
- One end piece has an annular groove on the inside diameter for receiving an 0-r ⁇ ng 24 that enables sealing to the permanent core.
- the test was conducted by placing a filter element on a permanent perforated core, passing hydraulic fluid through the element at a given pressure drop, and then measuring the force required to remove the filter element once the flow was stopped through the element .
- Two filter elements according to the prior art and two filter elements according to this invention were tested with pressure drops ranging up to 30 psid. The results are presented graphically on Fig. 3. As can be seen with the prior art filters, the greater the terminal pressure drop across the filter element the more force that is required to remove the filter element from the permanent core. On the other hand, the increase in terminal pressure drop across the filter element according to this invention does not increase the force required to remove the filter element.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU13767/99A AU1376799A (en) | 1997-11-04 | 1998-11-03 | Disposable filter element |
GB0012027A GB2347361B (en) | 1997-11-04 | 1998-11-03 | Disposable filter element |
DE19882784T DE19882784B4 (en) | 1997-11-04 | 1998-11-03 | Disposable filter element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US96417497A | 1997-11-04 | 1997-11-04 | |
US08/964,174 | 1997-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999022841A1 true WO1999022841A1 (en) | 1999-05-14 |
Family
ID=25508215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/023374 WO1999022841A1 (en) | 1997-11-04 | 1998-11-03 | Disposable filter element |
Country Status (5)
Country | Link |
---|---|
AU (1) | AU1376799A (en) |
DE (1) | DE19882784B4 (en) |
GB (1) | GB2347361B (en) |
TW (1) | TW391887B (en) |
WO (1) | WO1999022841A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19964180C2 (en) * | 1999-03-26 | 2002-11-14 | Argo Gmbh Fuer Fluidtechnik | filter element |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3592767A (en) * | 1970-04-23 | 1971-07-13 | Pall Corp | Laminated filter sheets and filter elements and process for making the same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3570675A (en) * | 1967-01-05 | 1971-03-16 | Pall Corp | Back pressure resistant filter element |
-
1998
- 1998-11-03 AU AU13767/99A patent/AU1376799A/en not_active Abandoned
- 1998-11-03 DE DE19882784T patent/DE19882784B4/en not_active Expired - Lifetime
- 1998-11-03 WO PCT/US1998/023374 patent/WO1999022841A1/en active Application Filing
- 1998-11-03 GB GB0012027A patent/GB2347361B/en not_active Expired - Fee Related
- 1998-11-04 TW TW087118372A patent/TW391887B/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3592767A (en) * | 1970-04-23 | 1971-07-13 | Pall Corp | Laminated filter sheets and filter elements and process for making the same |
Non-Patent Citations (1)
Title |
---|
"DISCOVERY SERIES ECO-PAK CORELESS FILTER ELEMENTS", VICKERS SALES BROCHURE, XX, XX, 1 January 1996 (1996-01-01), XX, pages 01 - 04, XP002916242 * |
Also Published As
Publication number | Publication date |
---|---|
GB0012027D0 (en) | 2000-07-05 |
DE19882784T1 (en) | 2000-10-26 |
TW391887B (en) | 2000-06-01 |
GB2347361B (en) | 2001-11-21 |
AU1376799A (en) | 1999-05-24 |
GB2347361A (en) | 2000-09-06 |
DE19882784B4 (en) | 2011-03-17 |
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