BR9707730A - Elemento de filtragem n o metálico sem núcleo - Google Patents

Elemento de filtragem n o metálico sem núcleo

Info

Publication number
BR9707730A
BR9707730A BR9707730A BR9707730A BR9707730A BR 9707730 A BR9707730 A BR 9707730A BR 9707730 A BR9707730 A BR 9707730A BR 9707730 A BR9707730 A BR 9707730A BR 9707730 A BR9707730 A BR 9707730A
Authority
BR
Brazil
Prior art keywords
filter
filter media
filter element
wrap
media
Prior art date
Application number
BR9707730A
Other languages
English (en)
Inventor
Albert F Cella
Donald J Gembolis
Bruce E Shane
Original Assignee
Parker Hannifin Corp
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 Parker Hannifin Corp filed Critical Parker Hannifin Corp
Publication of BR9707730A publication Critical patent/BR9707730A/pt

Links

Classifications

    • 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
    • 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
    • B01D29/111—Making filtering elements
    • 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
    • B01D29/50—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
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B01D39/202—Glass or glassy material the material being filamentary or fibrous sintered or bonded by inorganic agents
    • 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
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • 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
    • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/06—Details of supporting structures for filtering material, e.g. cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/10—Multiple layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geometry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
  • Thermistors And Varistors (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Filters And Equalizers (AREA)
  • Filtration Of Liquid (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
BR9707730A 1996-03-01 1997-02-20 Elemento de filtragem n o metálico sem núcleo BR9707730A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1358096P 1996-03-01 1996-03-01
PCT/US1997/002308 WO1997031695A1 (en) 1996-03-01 1997-02-20 Coreless non-metallic filter element

Publications (1)

Publication Number Publication Date
BR9707730A true BR9707730A (pt) 1999-07-27

Family

ID=21760678

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9707730A BR9707730A (pt) 1996-03-01 1997-02-20 Elemento de filtragem n o metálico sem núcleo

Country Status (9)

Country Link
US (1) US6099729A (pt)
EP (1) EP0883429B1 (pt)
AT (1) ATE337059T1 (pt)
BR (1) BR9707730A (pt)
CA (1) CA2247957C (pt)
DE (1) DE69736548T2 (pt)
DK (1) DK0883429T3 (pt)
ES (1) ES2268725T3 (pt)
WO (1) WO1997031695A1 (pt)

Families Citing this family (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5985411A (en) * 1994-03-14 1999-11-16 Upf Corporation Self-supporting pleated filter composite
US5795369A (en) * 1996-03-06 1998-08-18 Ceco Filters, Inc. Fluted filter media for a fiber bed mist eliminator
US6238552B1 (en) * 1998-09-04 2001-05-29 Roy T. Shannon Universal insert for a water purifier
JP4673973B2 (ja) * 1998-09-09 2011-04-20 ポール・コーポレーション 流体処理要素、流体処理要素を掃除する方法、および流体を処理する方法
US6830686B2 (en) * 2000-01-12 2004-12-14 Rct Technologies, Llc Filter cartridge support
JP2002011311A (ja) * 2000-04-28 2002-01-15 Toyoda Spinning & Weaving Co Ltd 濾過材の製造方法及び濾過材
US20020108896A1 (en) * 2001-02-09 2002-08-15 Edward Malkin Filtration device and method of manufacturing the same
US7182856B2 (en) * 2001-02-26 2007-02-27 Pank Thomas E Stormwater treatment train
US6869528B2 (en) 2001-02-26 2005-03-22 Thomas E. Pank Filtering system for runoff water
JP4670166B2 (ja) * 2001-03-21 2011-04-13 トヨタ紡織株式会社 フィルタの製造方法
JP2002282626A (ja) * 2001-03-29 2002-10-02 Kyosan Denki Co Ltd 液体用濾過体
US7438812B2 (en) * 2001-04-10 2008-10-21 Parker-Hannifin Corporation Filter element and method of making
US20030094408A1 (en) * 2001-11-19 2003-05-22 Schuyler Charles C. Length-adjustable filter cartridges
US6991112B2 (en) * 2002-03-05 2006-01-31 Romanow Enterprises, Inc. Disposable filter cartridge
US7473360B2 (en) * 2002-03-26 2009-01-06 Pall Corporation Length-adjustable filter cartridge end caps, filter cartridges employing, and methods of making, the same
US6857525B2 (en) * 2002-06-18 2005-02-22 B.D.H. Industries, Inc. Filtration cartridges with metallic end members and method of manufacturing
US7258781B2 (en) * 2002-09-09 2007-08-21 Clarity Filters Llc Single-use long-life faucet-mounted water filtration devices
US20040050767A1 (en) * 2002-09-13 2004-03-18 O'hern Patrick S. Retaining ring cap filter
DK174840B1 (da) * 2002-10-30 2003-12-15 Nordic Air Filtration As Filterelement samt et fastgørelsessystem til et filterelement.
US20050063412A1 (en) * 2003-09-19 2005-03-24 Adnan Osmani Data communication facilitating
US20050178719A1 (en) * 2004-02-12 2005-08-18 Pank Thomas E. Filter in the form of a roll and the method of making the same
MXPA06011808A (es) 2004-04-13 2006-12-15 Donaldson Co Inc Cartucho de filtro para filtracion de liquidos.
US7404838B1 (en) * 2004-07-09 2008-07-29 Pathak Pinakin Y Support for an air filter
WO2006078587A2 (en) * 2005-01-18 2006-07-27 Donaldson Company, Inc. Fluid filter
US7981189B2 (en) * 2005-08-29 2011-07-19 Greenlees Filter Llc Captive tooless fastener for securing an engine intake air filter and clamp assembly for air filter housing
DE102005045012A1 (de) * 2005-09-21 2007-04-05 Hydac Filtertechnik Gmbh Filtervorrichtung
EP2340883B1 (en) * 2005-11-15 2018-01-10 Donaldson Company, Inc. Liquid filter arrangement
ATE503544T1 (de) 2006-02-13 2011-04-15 Donaldson Co Inc Filtergewebe, das feine fasern und reaktive, adsorptive oder absorptive partikel umfasst
WO2009042641A2 (en) * 2007-09-24 2009-04-02 Parker-Hannifin Corporation Surface modified filtration media
BRPI0817499A2 (pt) * 2007-10-02 2015-07-14 Donaldson Co Inc Cartucho de filtro de líquidos e arranjo de filtro de líquidos
WO2009109435A1 (en) * 2008-03-07 2009-09-11 Bekaert Advanced Filtration Sa An elongate mesh pack for use as part of a filter candle
US8590712B2 (en) * 2008-10-08 2013-11-26 Cummins Filtration Ip Inc. Modular filter elements for use in a filter-in-filter cartridge
US8517185B2 (en) * 2008-10-08 2013-08-27 Cummins Filtration Ip, Inc. Two stage fuel water separator and particulate filter utilizing pleated nanofiber filter material
US8950587B2 (en) 2009-04-03 2015-02-10 Hollingsworth & Vose Company Filter media suitable for hydraulic applications
US8951420B2 (en) 2009-04-03 2015-02-10 Hollingsworth & Vose Company Filter media suitable for hydraulic applications
DE112010002027B4 (de) * 2009-05-15 2021-12-09 Cummins Filtration Ip, Inc. Koaleszenzabscheider und Verwendung eines Koaleszenzabscheiders in einem Koaleszenzsystem
US8431021B2 (en) * 2009-09-15 2013-04-30 Watkins Manufacturing Corporation Exchangeable media filter
US8535524B2 (en) * 2009-09-15 2013-09-17 Watkins Manufacturing Corporation Exchangeable media filter
US8679218B2 (en) 2010-04-27 2014-03-25 Hollingsworth & Vose Company Filter media with a multi-layer structure
US20130042589A1 (en) * 2010-08-20 2013-02-21 Michael J. Chanak Filter including a hot melt coated continuous substrate
US9358485B2 (en) 2011-08-19 2016-06-07 Baldwin Filters, Inc. Hydraulic spin-on filter cartridge having base plate supporting radially directed seal
US10058808B2 (en) 2012-10-22 2018-08-28 Cummins Filtration Ip, Inc. Composite filter media utilizing bicomponent fibers
US9694306B2 (en) 2013-05-24 2017-07-04 Hollingsworth & Vose Company Filter media including polymer compositions and blends
US20160228794A1 (en) * 2013-09-17 2016-08-11 Parker-Hannifin Corporation High flow coalescer
CN105658303B (zh) * 2013-10-24 2018-01-26 唐纳森公司 用于褶状过滤介质的支撑结构和方法
US10653979B2 (en) * 2014-04-10 2020-05-19 Donaldson Company, Inc. Pleated fluid filter element and methods
DE102014010196A1 (de) * 2014-07-10 2016-01-14 Rt-Filtertechnik Gmbh Filterelement
US10343095B2 (en) 2014-12-19 2019-07-09 Hollingsworth & Vose Company Filter media comprising a pre-filter layer
EP3286135B1 (en) 2015-04-21 2021-11-24 Donaldson Company, Inc. Filter assembly and methods
CN111643990B (zh) * 2015-06-08 2022-08-26 美国圣戈班性能塑料公司 滤筒组件
MX2018010429A (es) 2016-03-02 2019-06-12 Donaldson Co Inc Elemento de filtro que tiene soporte interno y metodos.
EP3474967A4 (en) * 2016-06-24 2020-02-12 K & N Engineering, Inc. AIR FILTER COMPONENT
DE112017002974T5 (de) 2016-07-19 2019-03-07 Cummins Filtration Ip, Inc. Koaleszer mit perforierter schicht
CN106422791A (zh) * 2016-08-31 2017-02-22 成都美富特膜科技有限公司 膜过滤单元以及膜组件
CN111214898B (zh) * 2018-11-23 2022-09-30 株式会社 Unilok 复合过滤器
US20210170311A1 (en) * 2019-12-09 2021-06-10 Pall Corporation Filter element, filter, filter device, and method of use
CN213049884U (zh) * 2020-06-17 2021-04-27 广州市华滤环保设备有限公司 一种除尘滤筒
DE102020213388A1 (de) * 2020-10-23 2022-04-28 Filtration Group Gmbh Ringfilterelement und zugehöriges Herstellungsverfahren sowie geeignete Filtereinrichtung

Family Cites Families (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2726184A (en) * 1952-11-01 1955-12-06 Purolator Products Inc Method of providing seals for filters
US2771156A (en) * 1953-10-22 1956-11-20 Bendix Aviat Corp Filter
US3174625A (en) * 1961-12-12 1965-03-23 Stone Filter Corp Filter
US3189179A (en) * 1962-07-18 1965-06-15 Gen Motors Corp Replaceable filter cartridge for a dry cleaner
US3306794A (en) * 1963-02-12 1967-02-28 Wix Corp Method of making a filter element
US3417870A (en) * 1965-03-22 1968-12-24 Gulf General Atomic Inc Reverse osmosis purification apparatus
US3386583A (en) * 1965-06-11 1968-06-04 Gulf General Atomic Inc Reverse osmosis membrane module
US3457339A (en) * 1965-12-08 1969-07-22 Pall Corp Process for making end capped filter elements
US3570675A (en) * 1967-01-05 1971-03-16 Pall Corp Back pressure resistant filter element
US4046697A (en) * 1968-02-27 1977-09-06 Briggs Southwick W Pleated paper filter
US3520417A (en) * 1969-07-02 1970-07-14 Carborundum Co Pleated paper filter and method of making same
US3675776A (en) * 1970-12-16 1972-07-11 Philip Campo Filter device
US3752321A (en) * 1971-06-03 1973-08-14 Tenneco Inc Pleat deformation control for pleated fluid treatment media
US4033881A (en) * 1975-01-06 1977-07-05 Pall Corporation Multilayer paper sheet filter cartridges
GB1518554A (en) * 1975-11-20 1978-07-19 Evans Adlard & Co Disposable filter element
US4186099A (en) * 1977-02-11 1980-01-29 All Services Enterprises, Inc. Filter assembly with paper cartridge
US4184966A (en) * 1977-09-29 1980-01-22 Pall David B Tubular filter elements with improved side seam seal
US4154688A (en) * 1978-01-27 1979-05-15 Pall Corporation Collapse-resistant corrugated filter element
US4211543A (en) * 1978-04-24 1980-07-08 Donaldson Company, Inc. Air cleaner with replaceable filter element
US4402830A (en) * 1982-01-13 1983-09-06 Pall Corporation Corrugated filter element with external spiral tape support
US4726901A (en) * 1984-01-06 1988-02-23 Pall Corporation Cylindrical fibrous structures with graded pore size
US4826597A (en) * 1986-07-25 1989-05-02 Pall Corporation Filter assembly with removable sheet
JPH0671536B2 (ja) * 1986-08-27 1994-09-14 倉敷紡績株式会社 フツ素樹脂製プリ−ツ状フイルタ−部材
JPH01164416A (ja) * 1987-12-18 1989-06-28 Takeshi Kimura フィルターの製造法
US4882056A (en) * 1988-04-01 1989-11-21 Pall Corporation Fluid filter element with an overlapped wrap
US5084178A (en) * 1988-06-15 1992-01-28 Pall Corporation Corrugated filter arrangement with support layer and flow channels
US5252207A (en) * 1988-06-15 1993-10-12 Pall Corporation Wrap member having openings
GB8829647D0 (en) * 1988-12-20 1989-02-15 Pall Corp Filter element assembly
US5130023A (en) * 1989-04-03 1992-07-14 Pall Corporation Filter cartridge with end densification ring
DE3925277A1 (de) * 1989-07-31 1991-02-07 Mann & Hummel Filter Filtereinsatz fuer in staubreichem betrieb eingesetzten luftfilter
US5171342A (en) * 1989-07-31 1992-12-15 Filterwerk Mann & Hummel Gmbh Filter insert for air filters used in a dust-filled environment
US5015375A (en) * 1989-08-16 1991-05-14 Mcf Systems, Inc. Rechargeable filter assembly
GB2274604B (en) * 1990-07-30 1995-02-22 Pall Corp A filter
US5211846A (en) * 1990-07-30 1993-05-18 Pleatco Electronic & Filter Corp. Replacement filter cartridge assembly
GB9019855D0 (en) * 1990-09-11 1990-10-24 Pall Corp Depth filter media
DE59208594D1 (de) * 1991-03-28 1997-07-10 Knecht Filterwerke Gmbh Flüssigkeitsfilter
US5250179A (en) * 1992-03-27 1993-10-05 Porous Media Corporation Compactable filter and compactable filter mounting means
US5427597A (en) * 1992-07-07 1995-06-27 Donaldson Company, Inc. Layered air filter medium having improved efficiency and pleatability
US5340479A (en) * 1992-08-20 1994-08-23 Osmonics, Inc. Depth filter cartridge and method and apparatus for making same
US5476585A (en) * 1993-02-24 1995-12-19 Pall Corporation Removably mounted hollow filter element and core
US5399264A (en) * 1993-03-22 1995-03-21 Cuno, Incorporated Compressible differential pressure energized seals for filter elements and the like
US5423984A (en) * 1993-04-13 1995-06-13 Facet International, Inc. Fluid filter
US5409642A (en) * 1993-10-06 1995-04-25 Exxon Chemical Patents Inc. Melt blowing of tubular filters
US5443721A (en) * 1994-02-10 1995-08-22 Basf Corporation Filter cartridge mounting assembly
US5632791A (en) * 1994-12-06 1997-05-27 Bha Group, Inc. Unitary filter cartridge
US5536290A (en) * 1995-02-17 1996-07-16 W. L. Gore & Associates, Inc. Pleated cartridge filter attachment for top loading filter assemblies
US5653831A (en) * 1995-10-17 1997-08-05 Sta-Rite Industries, Inc. Method and apparatus for making a filter module
US5681461A (en) * 1996-01-31 1997-10-28 Caterpillar Inc. Fluid filter having a reusable filter housing and central core and a replaceable coreless filter element
US5868932A (en) * 1996-07-20 1999-02-09 Fleetguard, Inc. Fiber with reusable shell and center tube

Also Published As

Publication number Publication date
DE69736548D1 (de) 2006-10-05
CA2247957A1 (en) 1997-09-04
EP0883429B1 (en) 2006-08-23
WO1997031695A1 (en) 1997-09-04
DE69736548T2 (de) 2007-09-13
US6099729A (en) 2000-08-08
DK0883429T3 (da) 2006-12-11
EP0883429A1 (en) 1998-12-16
ATE337059T1 (de) 2006-09-15
CA2247957C (en) 2006-06-06
ES2268725T3 (es) 2007-03-16

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]
B21A Patent or certificate of addition expired [chapter 21.1 patent gazette]

Free format text: PATENTE EXTINTA EM 20/02/2017