WO2001085301A1 - Filter element with foam girdle to secure pleats - Google Patents
Filter element with foam girdle to secure pleats Download PDFInfo
- Publication number
- WO2001085301A1 WO2001085301A1 PCT/US2001/014352 US0114352W WO0185301A1 WO 2001085301 A1 WO2001085301 A1 WO 2001085301A1 US 0114352 W US0114352 W US 0114352W WO 0185301 A1 WO0185301 A1 WO 0185301A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter media
- external
- peaks
- sleeve
- pleats
- Prior art date
Links
- 239000006260 foam Substances 0.000 title claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 4
- 239000012530 fluid Substances 0.000 description 9
- 238000001914 filtration Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000011800 void material 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
- B01D29/11—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
- B01D29/23—Supported filter elements arranged for outward flow filtration
- B01D29/232—Supported filter elements arranged for outward 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
- B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
- B01D29/56—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 multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—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 multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/04—Supports for the filtering elements
- B01D2201/0407—Perforated supports on both sides of the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/18—Filters characterised by the openings or pores
- B01D2201/188—Multiple filtering elements having filtering areas of different size
Definitions
- the present invention relates to filter elements and, more particularly, to standard and coreless filter elements having pleated filters.
- Fluid systems often include an in-line filtration system for filtering out particles or other impurities in the fluid.
- the in-line filtration systems generally include a housing forming a hollow center chamber, a fluid inlet port, and a fluid outlet port.
- a replaceable filter element usually forming a plurality of pleats, is positioned inside the hollow center chamber of the housing.
- An example of such a pleated element is disclosed in United States Patent No. 3,552,553 to Redding.
- the fluid enters the inlet port of the filter, which is generally positioned at an outer edge of the housing, flows through the replaceable filter element, and exits the outlet port which is usually positioned adjacent a center portion of the housing.
- the present invention provides a filter element generally including a pleated filter media forming an external media surface comprised of the external pleat peaks with each filter pleat being fixed spaced apart from a neighboring pleat.
- a filter media sleeve is positioned adjacent the external media surface of the filter media, wherein the filter media sleeve is in contact with the external filter media surface to maintain the separation between each pleat.
- the filter element according to the present invention may be manufactured by positioning the filter media sleeve adjacent to the external filter media surface and then compressing the filter media sleeve partially into indentations formed between each pleat of the filter media.
- the filter media sleeves can be preformed with ridges and valleys that correspond to opposing ridges and valleys in the external filter media surface of the filter media.
- Fig. 1 is an exploded view of one embodiment of the present invention.
- FIG. 1 The preferred embodiment of the present invention is generally shown in Fig. 1 showing a filter 10 having a first end 12 and a second end 14.
- a first end cap 16 is positioned adjacent the first end 12 of the filter 10.
- the first end cap 16 is provided with a groove 18 in the interior surface of hollow cylindrical cavity 20.
- An O- ring 22 is received in the groove 18 of the first end cap 16.
- a filter assembly 24 is positioned adjacent the first end cap 16.
- the filter assembly 24 generally includes a hollow perforated tube 26 with perforations 28 formed therethrough, an internal tubing surface, an external tubing surface 32, and a pleated filter media 34.
- the tube 26 is preferably formed from polypropylene, nylon, or other suitable material.
- the pleated filter media 34 having an internal filter media surface 36 comprising internal pleat peaks and an external filter media surface 38 comprising external pleat peaks, is positioned with the internal media surface 36 adjacent the external tube surface 32 of the tube 26.
- the internal filter media surface 36 and the external filter media surface 38 bound a plurality of individual pleats 40.
- the peaks of each pleat 40 are preferably spaced from peaks of a neighboring pleat 40 by a uniform distance.
- the pleated filter media 34 is preferably formed from cellulose, glass, or other suitable material.
- a filter media sleeve 42 having an internal sleeve surface 44 and an external sleeve surface 46, is positioned adjacent the external filter media surface 38 of the pleated filter media 34.
- the filter media sleeve 42 is preferably formed from reticulated flexible ether foam, approximately 0.16 cm to 2.5 cm thick T. However, the thickness can be increased or decreased depending on the size or application of the filter 10.
- One such foam is sold under the SIF trademark and is available commercially from Foamex International Inc., 1000 Columbia Avenue, Linwood, Pennsylvania 19061. It is a reticulated flexible polyurethane foam, characterized by a three-dimensional skeletal structure of strands which provide void space. With controlled pore sizes ranging from 1 pore per linear cm to 50 pores per linear cm, it offers uniformity.
- the internal sleeve surface 44 of the filter media sleeve 42 is in direct physical contact with the external filter media surface 38 of the pleated filter media 34.
- a support sleeve 48 preferably formed from polypropylene, nylon, or other suitable material, may be used to hold the filter media sleeve 42 in constant contact with the external filter media surface 38 of pleated filter media 34.
- the support sleeve 48 is provided with a plurality of orifices 50 and an internal support sleeve surface 52.
- a second end cap 54 is positioned adjacent the second end 14 of the filter 10 with the second end cap 54 provided with a groove 56 in the interior cylindrical surface in the hollow cylindrical cavity 58, wherein an O-ring 60 is received in the groove 56.
- the O-rings 22, 60 are preferably formed from rubber, synthetic rubber, nylon, or other suitable material.
- a handle 62 is attached to the second end cap 54 by pins 66.
- the filter media sleeve 42 can be preformed with ridges and indentations that correspond to the external peaks of the pleats 40 of the pleated filter media 34.
- the filter media sleeve 42 can be wrapped around or positioned adjacent pleated filter media 34 and compressed by the support sleeve 48 partially into the spaces formed between the pleats 40.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtration Of Liquid (AREA)
Abstract
A filter element (10) comprises a pleated filter media (34) having spaced apart pleats (40) and an external filter media surface (38) comprising the external peaks of the pleats (40) and a flexible foam filter media sleeve (42) in contact with the external filter media surface (38). The filter media sleeve (42) maintains the spacing between the external peaks of the pleats (40) of the pleated filter media (34).
Description
FILTER ELEMENT WITH FOAM GLRDLE TO SECURE PLEATS BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to filter elements and, more particularly, to standard and coreless filter elements having pleated filters.
2. Brief Description of the Prior Art
[0002] Fluid systems often include an in-line filtration system for filtering out particles or other impurities in the fluid. The in-line filtration systems generally include a housing forming a hollow center chamber, a fluid inlet port, and a fluid outlet port. A replaceable filter element, usually forming a plurality of pleats, is positioned inside the hollow center chamber of the housing. An example of such a pleated element is disclosed in United States Patent No. 3,552,553 to Redding. The fluid enters the inlet port of the filter, which is generally positioned at an outer edge of the housing, flows through the replaceable filter element, and exits the outlet port which is usually positioned adjacent a center portion of the housing.
[0003] One drawback of filters having pleated filtering elements is that the spacing of each individual pleat can vary as the differential pressure of the fluid passing through the pleats is increased. Upon filtration of high viscosity oil, for example at cold start-up, the pleats may move toward one another causing bunching which restricts the flow of fluid flowing through the filter and also decreases the effectiveness of the filter.
[0004] One approach to overcoming this problem is disclosed in PCT application WO 97/31695. That application discloses using a spun-bonded support disposed within a cylindrical, internal cavity formed by a pleated filter element. Internal peaks of the filter element, formed by the pleats, are glued to the support wrap to increase the stability of the filter element and maintain separation of the pleats. One drawback of that approach is the manufacturing and material costs associated with accurately fixing the internal peaks of the pleats to the support wrap such that the pleats are evenly spaced.
SUMMARY OF THE INVENTION
[0005] The present invention provides a filter element generally including a pleated filter media forming an external media surface comprised of the external pleat peaks with each filter pleat being fixed spaced apart from a neighboring pleat. A filter media sleeve is positioned adjacent the external media surface of the filter
media, wherein the filter media sleeve is in contact with the external filter media surface to maintain the separation between each pleat.
[0006] The filter element according to the present invention may be manufactured by positioning the filter media sleeve adjacent to the external filter media surface and then compressing the filter media sleeve partially into indentations formed between each pleat of the filter media. Alternatively, the filter media sleeves can be preformed with ridges and valleys that correspond to opposing ridges and valleys in the external filter media surface of the filter media.
[0007] These and other advantages of the present invention will be clarified in the description of the preferred embodiment taken together with the attached drawing.
BRIEF DESCRIPTION OF THE DRAWING
[0008] Fig. 1 is an exploded view of one embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0009] The preferred embodiment of the present invention is generally shown in Fig. 1 showing a filter 10 having a first end 12 and a second end 14. A first end cap 16 is positioned adjacent the first end 12 of the filter 10. The first end cap 16 is provided with a groove 18 in the interior surface of hollow cylindrical cavity 20. An O- ring 22 is received in the groove 18 of the first end cap 16.
[0010] A filter assembly 24 is positioned adjacent the first end cap 16. The filter assembly 24 generally includes a hollow perforated tube 26 with perforations 28 formed therethrough, an internal tubing surface, an external tubing surface 32, and a pleated filter media 34. The tube 26 is preferably formed from polypropylene, nylon, or other suitable material. The pleated filter media 34, having an internal filter media surface 36 comprising internal pleat peaks and an external filter media surface 38 comprising external pleat peaks, is positioned with the internal media surface 36 adjacent the external tube surface 32 of the tube 26. The internal filter media surface 36 and the external filter media surface 38 bound a plurality of individual pleats 40. The peaks of each pleat 40 are preferably spaced from peaks of a neighboring pleat 40 by a uniform distance. The pleated filter media 34 is preferably formed from cellulose, glass, or other suitable material.
[0011] A filter media sleeve 42, having an internal sleeve surface 44 and an external sleeve surface 46, is positioned adjacent the external filter media surface 38 of the pleated filter media 34. The filter media sleeve 42 is preferably formed from reticulated flexible ether foam, approximately 0.16 cm to 2.5 cm thick T. However, the thickness can be increased or decreased depending on the size or application of the filter 10. One such foam is sold under the SIF trademark and is available commercially from Foamex International Inc., 1000 Columbia Avenue, Linwood, Pennsylvania 19061. It is a reticulated flexible polyurethane foam, characterized by a three-dimensional skeletal structure of strands which provide void space. With controlled pore sizes ranging from 1 pore per linear cm to 50 pores per linear cm, it offers uniformity.
[0012] The internal sleeve surface 44 of the filter media sleeve 42 is in direct physical contact with the external filter media surface 38 of the pleated filter media 34. A support sleeve 48, preferably formed from polypropylene, nylon, or other suitable material, may be used to hold the filter media sleeve 42 in constant contact with the external filter media surface 38 of pleated filter media 34. The support sleeve 48 is provided with a plurality of orifices 50 and an internal support sleeve surface 52.
[0013] A second end cap 54 is positioned adjacent the second end 14 of the filter 10 with the second end cap 54 provided with a groove 56 in the interior cylindrical surface in the hollow cylindrical cavity 58, wherein an O-ring 60 is received in the groove 56. The O-rings 22, 60 are preferably formed from rubber, synthetic rubber, nylon, or other suitable material. A handle 62 is attached to the second end cap 54 by pins 66.
[0014] The filter media sleeve 42 can be preformed with ridges and indentations that correspond to the external peaks of the pleats 40 of the pleated filter media 34. Alternatively, the filter media sleeve 42 can be wrapped around or positioned adjacent pleated filter media 34 and compressed by the support sleeve 48 partially into the spaces formed between the pleats 40.
[0015] It has been found that positioning the filter media sleeve 42 in direct contact with the external surface of the pleated filter media 34, without adhesive, keeps the pleats 40 from bunching together during flow of a fluid through the pleated filter media 34. This antibunching effect helps prevent flow resistance exerted on the fluid during movement through the pleated filter media 34.
[0016] Having thus described our invention with the detail and particularity required by the Patent Laws, what is desired protected by Letters Patent is set forth in the following claims.
Claims
1. A filter element comprising: pleated filter media having spaced apart pleats and an external filter media surface comprising the external peaks of the pleats; and a flexible foam filter media sleeve in contact with the external filter media surface, wherein the filter media sleeve maintains the spacing between the external peaks of the pleats of the filter media.
2. A method of producing a filter as described in claim 1, comprising: preforming a filter media sleeve with ridges that correspond to external peaks of the filter media surface.
3. A method of producing a filter as described in claim 1, further comprising the step of: positioning a filter media sleeve adjacent the external peaks at the external filter media surface of a pleated filter media, wherein the filter media sleeve maintains the spacing between each of the external peaks.
4. A method of making a pleated filter element comprising: arranging a pleated filter media into a cylindrical shape having external pleat peaks and internal pleat peaks; and placing a foam filter media sleeve in contact with the external pleat peaks.
5. The method of claim 4, comprising : preforming a filter media sleeve with ridges that correspond to external peaks of the filter media surface.
6. The method of claim 4, comprising: positioning a filter media sleeve adjacent the external peaks at the external filter media surface of a pleated filter media, wherein the filter media sleeve maintains the spacing between each of the external peaks.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/043,904 US6986842B2 (en) | 2000-05-11 | 2005-01-26 | Filter element with foam girdle to secure pleats and method of forming same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20355300P | 2000-05-11 | 2000-05-11 | |
US60/203,553 | 2000-05-11 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/043,904 Continuation-In-Part US6986842B2 (en) | 2000-05-11 | 2005-01-26 | Filter element with foam girdle to secure pleats and method of forming same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001085301A1 true WO2001085301A1 (en) | 2001-11-15 |
Family
ID=22754454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/014352 WO2001085301A1 (en) | 2000-05-11 | 2001-05-03 | Filter element with foam girdle to secure pleats |
Country Status (2)
Country | Link |
---|---|
TW (1) | TW515725B (en) |
WO (1) | WO2001085301A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005014360A1 (en) * | 2005-03-30 | 2006-10-05 | Hydac Filtertechnik Gmbh | filter element |
WO2009065609A2 (en) * | 2007-11-23 | 2009-05-28 | Services Petroliers Schlumberger | Filter cartridge, and device and method for cleaning a filter cartridge |
WO2012096583A2 (en) | 2011-01-11 | 2012-07-19 | Secura-Nova Spółka Z Ograniczoną Odpowiedzialnością | Pleated filter and a method for manufacturing of pleated filters |
CN107635638A (en) * | 2015-06-18 | 2018-01-26 | 雅玛信过滤器株式会社 | Suction filter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3552553A (en) * | 1967-10-06 | 1971-01-05 | Torite Enterprises Inc | Dual media filtration cartridge |
-
2001
- 2001-05-03 WO PCT/US2001/014352 patent/WO2001085301A1/en active Application Filing
- 2001-05-10 TW TW090111153A patent/TW515725B/en active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3552553A (en) * | 1967-10-06 | 1971-01-05 | Torite Enterprises Inc | Dual media filtration cartridge |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005014360A1 (en) * | 2005-03-30 | 2006-10-05 | Hydac Filtertechnik Gmbh | filter element |
WO2006102966A1 (en) | 2005-03-30 | 2006-10-05 | Hydac Filtertechnik Gmbh | Filter element |
US8225940B2 (en) | 2005-03-30 | 2012-07-24 | Hydac Filtertechnik Gmbh | Filter element |
WO2009065609A2 (en) * | 2007-11-23 | 2009-05-28 | Services Petroliers Schlumberger | Filter cartridge, and device and method for cleaning a filter cartridge |
WO2009065609A3 (en) * | 2007-11-23 | 2010-02-18 | Services Petroliers Schlumberger | Filter cartridge, and device and method for cleaning a filter cartridge |
WO2012096583A2 (en) | 2011-01-11 | 2012-07-19 | Secura-Nova Spółka Z Ograniczoną Odpowiedzialnością | Pleated filter and a method for manufacturing of pleated filters |
CN107635638A (en) * | 2015-06-18 | 2018-01-26 | 雅玛信过滤器株式会社 | Suction filter |
Also Published As
Publication number | Publication date |
---|---|
TW515725B (en) | 2003-01-01 |
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