US Patent No: 6,113,784
Number of patents in Portfolio can not be more than 2000
Filter
Stats
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Sep 5, 2000
Issued date -
Aug 3, 1998
filing date -
09/127,778
serial no -
In Force
status
Importance
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Abstract
A filter includes a cylindrical pleated filter element having a longitudinal axis, an inner and outer periphery, first and second end surfaces, and a plurality of longitudinal pleats. First and second end elements are sealingly arranged with the first and second end surfaces, wherein at least one of the end elements is an open end element. The filter element is a pleated composite that includes a filter medium, an upstream drainage medium and a downstream drainage medium. Each pleat includes a crown, a root, and a pair of legs. The legs of each pleat are joined to one another at the crown of the pleat and are joined to the legs of adjacent pleats at the root of the pleat. Each pleat leg abuts an adjacent pleat leg along the inner periphery of the filter element and the pleats extend from the inner periphery in a curved, an arcuate, an angled, or a straight nonradial direction to the outer periphery. The height of each pleat, measured in a direction along the legs and extending from the inner periphery at the root of the filter element to the outer periphery at the crown of the filter element is greater than (D-d)/2 and less than (D.sup.2 -d.sup.2)/[4(d+2t)], where D and d are the outer diameter and the inner diameter of the filter element and t is the thickness of each leg.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,252,591 Corrugating apparatus and process | 32 | 1979 | |
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| 4,402,830 Corrugated filter element with external spiral tape support | 145 | 1982 | |
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| 4,797,259 Well-type diagnostic plate device | 85 | 1986 | |
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| 5,084,178 Corrugated filter arrangement with support layer and flow channels | 87 | 1989 | |
| 5,039,413 Spiral wrapped fluid treatment element | 51 | 1989 | |
| 5,130,023 Filter cartridge with end densification ring | 21 | 1989 | |
| 5,126,054 Venting means | 50 | 1990 | |
| 5,266,219 Device and method for separating plasma from blood | 30 | 1991 | |
| 5,275,743 Filter and filtration method | 38 | 1991 | |
| 5,480,554 Integrity-testable wet-dry-reversible ultrafiltration membranes and method for testing same | 17 | 1992 | |
| 5,393,101 Connector assembly | 33 | 1992 | |
| 5,451,321 Venting system | 48 | 1992 | |
| 5,403,482 Self-supporting, pleated, spirally wound filter and the corresponding process of making | 28 | 1993 | |
| 5,543,047 Filter with over-laid pleats in intimate contact | 47 | 1993 | |
| 5,489,379 Apparatus for filtering solution | 6 | 1994 | |
| 5,490,868 In-line filter for tubing | 10 | 1994 | |
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| 5,622,620 Apparatus for treating fountain solution | 9 | 1995 | |
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| D374476 Cylindrical cage for a filter | 14 | 1995 | |
| 5,685,991 Integrity-testable wet-dry-reversible ultrafiltration membranes and method for testing same | 8 | 1995 | |
| 5,652,050 Fibrous web for processing a fluid | 19 | 1996 | |
| 5,690,765 Methods of assembling a filter | 26 | 1996 | |
| 5,725,784 Filtering method | 12 | 1996 | |
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| 4,802,982 Spiral-wound membrane with improved permeate carrier | 16 | 1987 | |
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| 4,836,931 Reinforced filter tube and method of making the same | 14 | 1986 | |
| 4,814,033 Method of making a reinforced filter tube | 15 | 1987 | |
| 5,250,179 Compactable filter and compactable filter mounting means | 58 | 1992 | |
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| 5,362,522 Process for the production of a membrane | 23 | 1993 | |
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| 5,605,631 Membranes | 10 | 1995 | |
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| 5,290,502 Method of making a rigidized fiber filter element | 5 | 1992 | |
| 5,456,836 High-efficiency, self-supporting filter element made from fibers | 10 | 1994 | |
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| 4,201,119 Filter pleating machine | 16 | 1978 | |
| 4,615,804 High density pleat spacing and scoring tool and filter made therewith | 17 | 1984 | |
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| 4,293,414 Slotted sheet filter element | 18 | 1979 | |
| 4,405,466 Backwash method and apparatus | 26 | 1982 | |
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| 5,387,344 Process for treating waste water oxidation ponds to abate malodors | 11 | 1992 | |
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| 4,963,325 Swab expressor immunoassay device | 43 | 1988 | |
| 5,084,245 Assay device for swab borne analytes | 15 | 1990 | |
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| 5,598,643 Capillary dewatering method and apparatus | 66 | 1994 | |
| 5,701,682 Capillary dewatering method and apparatus | 53 | 1996 | |
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| 4,501,663 Filter cartridges and methods and components for making them | 27 | 1981 | |
| 5,114,582 Filter element and spiral-wound membrane cartridge containing same | 42 | 1991 | |
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| 4,842,739 High surface area filter cartridge | 45 | 1987 | |
| 4,828,698 Filtering apparatus | 69 | 1988 | |
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| 4,321,288 Process of making an improved filter media | 28 | 1979 | |
| 4,617,128 Particulate filter aid, filter bed and process | 27 | 1981 | |
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| 4,655,921 Filter element | 13 | 1985 | |
| 4,673,503 Variant length pleated filter element | 26 | 1985 | |
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| 4,877,527 Liquid filter of spiral wound construction with alternate layers of a surface area media and a depth media | 33 | 1987 | |
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| 4,765,893 Coiled membrane filter cartridge | 14 | 1986 | |
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| 5,517,709 Apparatus for selectively metering dressing onto a bowling lane surface | 10 | 1994 | |
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| 5,419,833 Apparatus for treatment of wastewater | 3 | 1993 | |
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| 4,223,597 Method of the production of cigarette filters | 9 | 1977 | |
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| 5,460,974 Method of assaying whole blood for HDL cholesterol | 20 | 1992 | |
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| 4,422,861 Aerosol filter cartridge | 21 | 1982 | |
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| 5,071,555 Filter folded in a zig-zag configuration | 35 | 1990 | |
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| 4,692,196 Apparatus and method for wrapping an external tape support about a filter element assembly | 14 | 1985 | |
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| 5,104,540 Coated molten metal filters | 15 | 1990 | |
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| 5,028,465 Hydroentangled composite filter element | 11 | 1989 | |
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| 5,096,584 Spiral-wound membrane separation device with feed and permeate/sweep fluid flow control | 29 | 1990 | |
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| 4,500,426 Semipermeable membrane elements | 34 | 1981 | |
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| 5,591,338 Fluid filter | 23 | 1995 | |
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| 4,564,376 Filter element and method of making a filter element | 15 | 1983 | |
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| 4,443,346 Method of cleaning filter elements | 14 | 1982 | |
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| 5,448,419 Apparatus and method for anhysteretically recording from master drum to slave web | 6 | 1993 | |
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| 5,421,977 Filter press electrolyzer | 5 | 1993 | |
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| 4,944,887 Regenerative diatomaceous earth filter | 10 | 1989 | |
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| 5,376,278 Filter and a method for separating charged particles from a liquid stream | 23 | 1993 | |
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| 4,650,102 Apparatus for forming apertures in pleats | 7 | 1986 | |
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| 5,174,896 Filtering system utilizing rotational flow and angled pleated filter media and method for making slanted pleated filter media | 26 | 1991 | |
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| 4,206,050 Membrane unit and apparatus for removing metabolite contaminants from blood | 26 | 1977 | |
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| 4,865,637 Filter cartridge | 17 | 1988 | |
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| 4,855,058 High recovery spiral wound membrane element | 41 | 1988 | |
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| 5,166,051 Membranes, membrane overlays for exclusion of erythrocytes, and method for immunoassay of whole blood analytes | 39 | 1990 | |
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| 5,256,372 Dipstick test device including a removable filter assembly | 34 | 1989 | |
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| 4,526,688 Pressure filter with vibratory impactor | 31 | 1981 | |
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| 5,092,990 Filter device | 25 | 1990 | |
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| 5,147,541 Spiral filtration module with strengthened membrane leaves and method of constructing same | 37 | 1991 | |
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| 5,149,449 Method and device for filturing of suspensions | 12 | 1991 | |
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| 4,752,396 Multi-strand wound filter with variant cross sectional density | 11 | 1985 | |
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| 5,468,397 Gas backwash of pleated filters | 32 | 1993 | |
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| 5,841,021 Solid state gas sensor and filter assembly | 32 | 1995 | |
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| 4,872,990 Membrane module for hyperfiltration or ultrafiltration of containating liquid flows | 20 | 1988 | |
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| 5,120,296 Method and apparatus for forming filter element | 21 | 1990 | |
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| 4,839,037 Tapered, spirally wound filter cartridge and method of making same | 43 | 1987 | |
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| 5,252,207 Wrap member having openings | 68 | 1991 | |
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| 4,660,779 Multilayer precision wound filter cartridge | 26 | 1986 | |
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| 5,204,002 Curved channel membrane filtration | 14 | 1992 | |
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| 5,296,134 Filtration structure for fluid flow radially through cylindrical configuration defined by stack of serrated wafers | 10 | 1992 | |
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| 4,543,112 Sorbent type filter assembly for a respirator and method of making same | 34 | 1984 | |
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| 5,028,329 Process for preparing reverse-osmosis membrane, and membrane obtained with the process | 12 | 1989 | |
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| 4,421,646 Filtering device | 13 | 1979 | |
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| 4,940,500 Filter medium forming system and process | 55 | 1988 | |
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| 5,419,870 Antibody testing system | 5 | 1992 | |
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| 4,214,612 Tube of non woven material for reversed osmosis | 18 | 1975 | |
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| 5,664,628 Filter for subterranean wells | 64 | 1994 | |
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| 4,767,426 Membrane filter tube and method of preparation | 30 | 1987 | |
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| 4,181,070 Method of making variable pleat paper | 12 | 1977 | |
| 4,519,531 Pleating machine for pleating cloth with mutually converging folds | 8 | 1984 | |
| 5,114,508 Filter element and its production | 10 | 1987 | |
| 5,096,591 Spirally, wound filter cartridge, apparatus system and method of manufacture and use | 20 | 1990 | |