[go: up one dir, main page]

WO1997022395A9 - Filtre possedant des elements magnetiques et son procede de fabrication - Google Patents

Filtre possedant des elements magnetiques et son procede de fabrication

Info

Publication number
WO1997022395A9
WO1997022395A9 PCT/US1996/020691 US9620691W WO9722395A9 WO 1997022395 A9 WO1997022395 A9 WO 1997022395A9 US 9620691 W US9620691 W US 9620691W WO 9722395 A9 WO9722395 A9 WO 9722395A9
Authority
WO
WIPO (PCT)
Prior art keywords
filter
filter medium
polymer
magnetic
magnetic material
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/US1996/020691
Other languages
English (en)
Other versions
WO1997022395A1 (fr
Filing date
Publication date
Application filed filed Critical
Priority to AU13522/97A priority Critical patent/AU1352297A/en
Priority to BR9612087A priority patent/BR9612087A/pt
Priority to EP96945066A priority patent/EP0956135A4/fr
Priority to JP09523075A priority patent/JP2000502284A/ja
Publication of WO1997022395A1 publication Critical patent/WO1997022395A1/fr
Publication of WO1997022395A9 publication Critical patent/WO1997022395A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Definitions

  • This invention relates generally to fluid filters, and more particularly to fluid filters equipped with a magnetic component that acts to trap and remove contaminants from the fluid being filtered.
  • Fluid filters are generally capable of removing contaminants having particle sizes above a given minimum size, while smaller particles pass through the filter medium. A balance must be struck between the lower size limit of retained particles and the flow rate allowed by the filter, because as the filter medium is constructed to retain smaller particles, the speed with which fluid flows through the medium is reduced. Therefore, it is simply not possible to remove all contaminants at practical rates of flow.
  • Metallic contaminants cause particular concern, because they may be very small, yet cause damage to the mechanism the filter is intended to protect. In, for example, an automotive engine, it is very important to remove minute metallic contaminants from the circulating lubricating oil to prevent damage to the internal engine components. Additionally, normal engine operation continually causes the production of additional metallic contaminants. The filter medium necessary to retain such metallic contaminants would cause excessive back pressure, and therefore, these fine metallic contaminants must be removed by another means.
  • One alternative means of removing fine metallic particles from the fluid passing through the filter is to include a magnetic element in the filter that attracts and traps the metallic contaminants that exhibit magnetic attraction, such as iron and steel, either before or after they pass through the filter medium.
  • Various attempts have been made to incorporate a magnetic component in a filter.
  • Prior art magnetic filters that have included a magnetic element have generally done so by including some type of a bar magnet inside the filter assembly.
  • U.S. Patent No. 3,279,607 issued October 18, 1966 to Michaelson discloses an automotive oil filter having one or more bar magnets disposed in one or more folds of the filter material, spaced equally around the circumference of the filter housing.
  • U.S. Patent No. 4,501,660, issued February 26, 1985 to Hebert relates to an oil filter having a magnetized helical coil disposed in the central core of the filter assembly.
  • An externally-attached magnetic element is disclosed by U.S. Patent No. 5,282,963, issued February 1, 1994 to Hull, et al .
  • a magnetic element sized to fit over the end of an oil filter housing is attached to the filter housing by magnetic attraction to metallic elements of the housing and filter.
  • U.S. Patent No. 5,354,462 issued October 11, 1994 to Perritt relates to a strap that fastens around the outside of an oil filter housing to hold in place magnetic elements.
  • U.S. Patent No. 2,893,561, issued March 7, 1958 to Duzich relates to sheets of filter element material having small particles of magnetic material dispersed throughout the material or attached to the surface by impregnating the sheet with a polyvinyl acetate bonding agent .
  • the instant invention overcomes the problems of the prior art by strategically placing the magnetic elements directly in the fluid flow path through the filter, and they are simple to manufacture.
  • the filter element of the invention may be enclosed within a disposable or reusable housing, or it may simply fit into a recess provided in the apparatus through which the fluid is circulated, for example an engine block.
  • the filter comprises : a) a filter housing having an inlet and outlet defining a fluid flow path; b) a filter medium located in the fluid flow path between the inlet and outlet; and c) a polymer-bonded magnetic material comprising at least one compounded magnetic filler and at least one polymeric binder, said polymer-bonded magnetic material molded onto a surface of the filter medium, such that a fluid passing through the filter is directed over the magnetic material.
  • Preferred embodiments include a series of "dots" of magnetic material placed on the surface of the filter medium in a pattern that covers a portion of the surface, or a grid pattern that acts to stiffen and support the filter medium, in addition to the magnetic contaminant removal function.
  • the polymer-bonded magnetic material may act as a spacer between two or more layers of filter material .
  • the polymer-bonded magnetic material may extend through the filter medium. Numerous other possibilities exist for the size and shape of the polymer bonded magnetic material, within the scope of the present invention.
  • the filter comprises : a) a thermoplastic filter housing having an inner wall, the inner wall of the housing impregnated with a compounded magnetic filler, and an inlet and an outlet defining a fluid flow path through the filter; and b) a filter medium disposed between the inlet and outlet such that a fluid flowing therethrough passes through the filter medium, and such that fluid is in communication with the housing inner wall.
  • a filter element comprises : a) a filter medium; b) the filter medium retained and supported by a molded thermoplastic frame impregnated with at least one compounded magnetic filler, such that the polymer-bonded magnetic material is placed in the fluid flow path.
  • the filter element comprises : a) a substantially cone-shaped frame, having an open base and a vertex; b) a filter medium supported by a plurality of ribs connecting the vertex and the open base; and c) a polymer-bonded magnetic cap over-molded to the vertex of the cone-shaped frame.
  • filter element examples include a flat, disk- shaped element, a cylinder shape, or any other shape required by a given application.
  • the filter includes a magnetic " anti-drain-back valve" to prevent the fluid being filtered from draining back out of the filter when the fluid is no longer under pressure, i.e. "reverse-flow.
  • the anti- drain-back valve consists of a flap constructed from neoprene, or another suitable material, that covers the filter inlet on the inside of the filter housing.
  • the flap When the fluid is under pressure, i.e., being forced through the filter, the flap is lifted by the force exerted by the fluid, allowing the fluid to flow into the filter.
  • the flap seals the inlet from the inside of the housing, preventing reverse-flow of the unfiltered fluid.
  • the flap is impregnated with a compounded magnetic filler, rendering the flap magnetic.
  • the method of manufacturing the filters of the claimed invention comprises using insert injection molding techniques and equipment to deposit molten thermoplastic resin material impregnated with at least one compounded magnetic filler on the filter medium in a designated pattern or to create the thermoplastic resin frame, cap or other magnetic- impregnated element.
  • the magnetic filler may then be magnetized and magnetically oriented during the molding process, before or after the thermoplastic resin has set, according to methods well-known to those in the art.
  • FIG. 1 is a cross-sectional view of a filter having polymer- bonded magnetic material molded to the surface of the filter medium.
  • FIG. 2 is a plan view of a transmission filter medium and grid framework comprising a polymer-bonded magnetic material.
  • FIG. 2A is cross-section of the transmission filter medium and grid framework of FIG. 2 in a folded, operational relationship .
  • FIG. 3 is a cross-sectional view of a filter having a thermoplastic housing, the wall of which is impregnated with a compounded magnetic filler.
  • FIG. 4 is a cross-sectional view of a filter having a housing, the inner wall of which is coated with a polymer-bonded magnetic material.
  • FIG. 5 is cross-sectional view of a cone-shaped filter element having a magnetic frame.
  • FIG. 6 is a cross-sectional view of a cone-shaped filter element having a magnetic cap affixed to the frame.
  • FIG. 7 is a plan view of a disk-shaped filter element with a magnetic frame .
  • FIG. 8 is a plan view of a disk-shaped filter element having a magnetic cap affixed to the frame.
  • FIG. 9 is a cross-sectional view of a filter including an anti-drain-back valve.
  • FIG. 10 is a plan view of a cylindrical filter element having a magnetic frame. DETAILED DESCRIPTION OF THE DRAWINGS
  • FIGS. 1-10 show ten different embodiments of filters and/or filter elements embodying the present invention.
  • the filter 10 of one preferred embodiment of the invention is comprised of a housing 12, having an inlet 14 and an outlet 16, the inlet 14 and outlet 16 defining a fluid flow path through the filter 10, and a filter medium 18 located in the fluid flow path.
  • Fluid flowing in through the inlet 14 is directed through the filter medium 18.
  • Molded directly to the surface of the filter medium 18 is a polymer-bonded magnetic material 20 positioned such that a fluid flowing through the filter 10 is directed over the polymer- bonded magnetic material 20.
  • the polymer-bonded magnetic material 20 is in the shape of a circular deposit, although other forms are contemplated within the scope of the invention, including a series of such deposits spaced at intervals across the surface of the filter medium 18.
  • the transmission filter includes a housing (not shown) and a filter medium 17 which folds to form an envelope 19.
  • An inlet hole 21 is cut in the filter medium 17, which is adjacent an inlet in the housing (not shown) .
  • a polymer-bonded magnetic material 23 placed within the envelope 19 of the filter medium 17 is a polymer-bonded magnetic material 23 in the shape of a grid pattern 23 that acts to support the filter medium 17 and prevent the collapse of the envelope 19.
  • the grid 23 will also attract and trap magnetically-attractive contaminants as the fluid flowing through the filter passes over the polymer- bonded magnetic material.
  • the filter 30 includes a housing 32 with an inner wall 33, an inlet 34, and an outlet 36, the inlet 34 and the outlet 36 defining a fluid flow path through the filter 30, such that a fluid flowing through the filter 30 is in communication with the inner wall 33, and a filter medium 38 located in the fluid flow path.
  • the inner wall 33 of the housing 32 is impregnated with a compounded magnetic filler, rendering the inner wall 33 magnetic.
  • FIG. 4 An alternative form of this embodiment is depicted in Fig. 4, wherein the filter 40 includes a housing 42 with an inner wall 43, an inlet 44 and an outlet 46 defining a fluid flow path through the housing 42, and a filter medium 48 located in the fluid flow path.
  • the inner wall 43 is coated with a polymer-bonded magnetic material 45. Fluid flowing through the filter 40 is in communication with the inner wall 43 and, thus, with the polymer-bonded magnetic material 45 coating the inner wall 43.
  • a fifth embodiment of the filter 50 includes a cone-shaped frame 52, having a base ring 53, a vertex 54 and ribs 55 connecting the base ring 53 with the vertex 54 and supporting a filter medium 56.
  • the frame 52 is constructed from a molded thermoplastic resin impregnated with a compounded magnetic filler. The fluid passing through the filter medium 56 is directed over the frame 52, and any magnetically-attractive contaminants are removed by contact with the magnetic filler- impregnated frame.
  • the frame 62 is not impregnated with a magnetic filler, but instead, a cap 64 constructed from a polymer-bonded magnetic material is affixed to the vertex 66 of the frame 62 placing the cap 64 in the fluid flow path through the filter. Fluid flowing through the filter passes over the cap 64, thereby removing magnetically-attractive contaminants from the filter.
  • a seventh embodiment of the present invention comprising a filter element 70, generally in the shape of a disc, having a ring- shaped frame 72, a hub 73 and ribs 74 connecting the frame 72 with the hub 73.
  • a filter medium 76 is supported by the frame 72, the hub 73, and the ribs 74.
  • At least a portion of the frame 72, ribs 73 and/or hub 74 are constructed from a molded thermoplastic resin impregnated with a compounded magnetic filler, rendering that portion of the structure magnetic.
  • Fluid passing through the filter is directed over the frame 72, ribs 74 and/or hub 73, thereby trapping and retaining magnetically-attractive contaminants.
  • An alternative is depicted in Fig. 8, where the frame 82 is not impregnated with the magnetic compound, but a cap 84 molded to the hub 86 is impregnated with a compounded magnetic filler. Fluid flowing through the filter is directed over the magnetic cap 84, removing magnetically-attractive contaminants from the fluid as the fluid passes over the cap 86.
  • Fig. 9 depicts a ninth embodiment of the invention, wherein the filter 90 incorporates an anti-drain-back valve 92.
  • the anti-drain-back valve 92 comprises a polymeric flap impregnated with a compounded magnetic filler, positioned so as to cover the inner opening of the filter inlet 95. As the fluid enters the inlet 95, the fluid passes over the magnetic- impregnated polymeric flap 92, thus removing and retaining magnetically-attractive contaminants .
  • Fig. 10 depicts a tenth embodiment of the invention, wherein the filter 100 includes a cylindrical frame 102, the frame 102 defining an inlet 104 and an outlet 106.
  • the frame 102 is molded from a polymeric material impregnated with a compounded magnetic filler. Fluid passing through the filter 100 contacts the frame 102, and any magnetically-attractive contaminants are removed from the fluid by contact with the magnetic filler-impregnated frame 102.
  • the filter medium may comprise any type of known filter medium, such as woven materials and non-woven materials.
  • suitable materials include polyester felt; phenolic resin-impregnated polyester felt; a woven screen made from nylon, polyester, or polypropylene; filter membrane material; paper; and phenolic resin-impregnated paper .
  • the polymer-bonded magnetic materials used in the invention consist of a compounded magnetic filler and a polymeric binder.
  • Exemplary magnetic materials include barium ferrite, strontium ferrite, isotropic neodymium-iron-boron, anisotropic neodymium-iron-boron, samarium-cobalt and hybrid materials formed from mixtures of the foregoing.
  • Exemplary polymeric binders include Nylon 6, Nylon 4/6, Nylon 6/6, Nylon 6/10, Nylon 12, polyphenylene sulfide, polypropylene, polyethylene and nitrile rubber.

Abstract

Filtre (10) composé d'un carter (12) pourvu d'une entrée (14) et d'une sortie (16), qui définissent un trajet d'écoulement de liquide à travers le filtre (10), ainsi que d'un milieu filtrant (18) situé dans ledit trajet d'écoulement. Le liquide pénétrant à travers l'entrée (14) est dirigé à travers le milieu filtrant (18). Un matériau magnétique (20) fixé à un polymère est moulé directement sur la surface du milieu filtrant et est placé de telle façon que le liquide circulant à travers le filtre (10) est dirigé sur le matériau magnétique (20) fixé au polymère.
PCT/US1996/020691 1995-12-19 1996-12-19 Filtre possedant des elements magnetiques et son procede de fabrication Ceased WO1997022395A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU13522/97A AU1352297A (en) 1995-12-19 1996-12-19 Filter having magnetic components and method of manufacturing same
BR9612087A BR9612087A (pt) 1995-12-19 1996-12-19 Filtro tendo componentes magnéticos e método para fabricação do mesmo
EP96945066A EP0956135A4 (fr) 1995-12-19 1996-12-19 Filtre possedant des elements magnetiques et son procede de fabrication
JP09523075A JP2000502284A (ja) 1995-12-19 1996-12-19 磁石成分を有するフィルターとその製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US885195P 1995-12-19 1995-12-19
US60/008,851 1995-12-19

Publications (2)

Publication Number Publication Date
WO1997022395A1 WO1997022395A1 (fr) 1997-06-26
WO1997022395A9 true WO1997022395A9 (fr) 1998-05-14

Family

ID=21734066

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/020691 Ceased WO1997022395A1 (fr) 1995-12-19 1996-12-19 Filtre possedant des elements magnetiques et son procede de fabrication

Country Status (6)

Country Link
EP (1) EP0956135A4 (fr)
JP (1) JP2000502284A (fr)
AU (1) AU1352297A (fr)
BR (1) BR9612087A (fr)
CA (1) CA2241029A1 (fr)
WO (1) WO1997022395A1 (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6210572B1 (en) 1999-10-18 2001-04-03 Technology Commercialization Corp. Filter and method for purifying liquids containing magnetic particles
WO2001045888A1 (fr) * 1999-12-20 2001-06-28 The Gleason Works Melangeur de composes abrasifs et filtre pour machine a roder
US6461504B1 (en) * 2000-05-09 2002-10-08 Honeywell International Inc. Contaminant filter with magnetic filtration capabilities
US8784336B2 (en) 2005-08-24 2014-07-22 C. R. Bard, Inc. Stylet apparatuses and methods of manufacture
KR100848068B1 (ko) * 2006-10-31 2008-07-23 현대 파워텍 주식회사 자동변속기의 오일필터
US8388541B2 (en) 2007-11-26 2013-03-05 C. R. Bard, Inc. Integrated system for intravascular placement of a catheter
US9521961B2 (en) 2007-11-26 2016-12-20 C. R. Bard, Inc. Systems and methods for guiding a medical instrument
US9649048B2 (en) 2007-11-26 2017-05-16 C. R. Bard, Inc. Systems and methods for breaching a sterile field for intravascular placement of a catheter
US8781555B2 (en) 2007-11-26 2014-07-15 C. R. Bard, Inc. System for placement of a catheter including a signal-generating stylet
US10751509B2 (en) 2007-11-26 2020-08-25 C. R. Bard, Inc. Iconic representations for guidance of an indwelling medical device
WO2010022370A1 (fr) 2008-08-22 2010-02-25 C.R. Bard, Inc. Ensemble cathéter comprenant un capteur d'électrocardiogramme et ensembles magnétiques
US9532724B2 (en) 2009-06-12 2017-01-03 Bard Access Systems, Inc. Apparatus and method for catheter navigation using endovascular energy mapping
EP2464407A4 (fr) 2009-08-10 2014-04-02 Bard Access Systems Inc Dispositifs et procédés pour électrographie endovasculaire
CN102821679B (zh) 2010-02-02 2016-04-27 C·R·巴德股份有限公司 用于导管导航和末端定位的装置和方法
JP5980201B2 (ja) 2010-05-28 2016-08-31 シー・アール・バード・インコーポレーテッドＣ Ｒ Ｂａｒｄ Ｉｎｃｏｒｐｏｒａｔｅｄ 針および医療用コンポーネントのための挿入誘導システム
WO2011150376A1 (fr) 2010-05-28 2011-12-01 C.R. Bard, Inc. Appareil convenant à une utilisation avec un système de guidage d'insertion d'aiguille
DE102010035981A1 (de) * 2010-09-01 2012-03-01 Hydac Filtertechnik Gmbh Bauteil für eine Filtereinheit zur Filtration von Fluiden und Verfahren zur Herstellung eines derartigen Bauteils
DE102011117163B4 (de) * 2011-10-28 2015-03-05 Ibs Filtran Kunststoff-/ Metallerzeugnisse Gmbh Filteranordnung
DE102011119464A1 (de) * 2011-11-25 2013-05-29 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät und Saugkopf zur Verbindung mit der Kraftstoffleitung in einem handgeführten Arbeitsgerät
DE102013225529B4 (de) * 2013-12-11 2015-10-01 Eberspächer Climate Control Systems GmbH & Co. KG Fahrzeugkühlmittelfilteranordnung
ES2811323T3 (es) 2014-02-06 2021-03-11 Bard Inc C R Sistemas para el guiado y la colocación de un dispositivo intravascular
DE102014217493A1 (de) 2014-09-02 2016-03-03 Volkswagen Aktiengesellschaft Filter
US10973584B2 (en) 2015-01-19 2021-04-13 Bard Access Systems, Inc. Device and method for vascular access
WO2016210325A1 (fr) 2015-06-26 2016-12-29 C.R. Bard, Inc. Interface de raccord pour système de positionnement de cathéter basé sur ecg
US11000207B2 (en) 2016-01-29 2021-05-11 C. R. Bard, Inc. Multiple coil system for tracking a medical device
EP3311901B1 (fr) * 2016-10-19 2021-04-21 Hydac Filtertechnik GmbH Élément filtrant avec un film magnétique permanent et cassette filtrante correspondante
ES2811359T3 (es) * 2016-12-14 2021-03-11 Bard Inc C R Agujas para su uso con sistemas para guiar un instrumento médico
JP2019063728A (ja) * 2017-09-29 2019-04-25 エイケン工業株式会社 オイルフィルタ
EP3852622B1 (fr) 2018-10-16 2025-04-02 Bard Access Systems, Inc. Systèmes de connexion équipés de sécurité et leurs procédés d'établissement de connexions électriques
CN114345011A (zh) * 2022-02-12 2022-04-15 济南江翔流体科技有限公司 一种供热循环水除污过滤装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3051988A (en) * 1957-02-09 1962-09-04 Baermann Max Material with permanent magnetic properties
US2893561A (en) * 1958-03-07 1959-07-07 Fram Corp Magnetic filter elements
JPS56105717A (en) * 1980-01-24 1981-08-22 Toshiba Corp Magnetic filter
US5354462A (en) * 1992-04-10 1994-10-11 Shane Marie Owen Magnetic filter strap
US5468529A (en) * 1992-08-28 1995-11-21 Korea Institute Of Science And Technology Magnetic filter material comprising a self-bonding nonwoven fabric of continuous thermoplastic fibers and magnetic particulate within the fibers
US5556540A (en) * 1994-06-30 1996-09-17 Brunsting; William J. Magnetic assembly for a closed pressurized flow path of lubricating oil

Similar Documents

Publication Publication Date Title
WO1997022395A9 (fr) Filtre possedant des elements magnetiques et son procede de fabrication
WO1997022395A1 (fr) Filtre possedant des elements magnetiques et son procede de fabrication
US4067810A (en) Fluid filter magnet assembly
US5085768A (en) Welded fuel tank
US4446019A (en) Magnetic filtration in a spin-on fluid filter
HUT76505A (en) Magnetic filter assembly
CA1156938A (fr) Organe de filtration a cuvette avec decollement et de resserrement a l'endroit de l'assise
US5556540A (en) Magnetic assembly for a closed pressurized flow path of lubricating oil
US5643467A (en) Filter cartridge having gasket seal employing pressure ridges to prevent leakage
US6210572B1 (en) Filter and method for purifying liquids containing magnetic particles
EP0662696A1 (fr) Procédé de fabrication d'un dispositif à solénoide pour values électromagnétiques
JP2013096412A (ja) フィルター配置
US4464186A (en) Pneumatic filter and liquid evaporator
AU2002367177B2 (en) Magnetic fluid filter adapter
EP0770467B1 (fr) Dispositif pour fixer une matrice dans un moule métallique
KR960038217A (ko) 밸브의 필터링 유동장치 및 방법
US5389252A (en) Magnetic filter aid
JPS6344003B2 (fr)
CA1062170A (fr) Element de filtrage magnetique
US4773990A (en) Axial flow filter having entry and exit filtration stages and flow distribution means
US3042205A (en) Magnetic separator with magnetic rubber element
US20020134719A1 (en) Magnetic assembly to applied against an oil filter
US6413421B1 (en) Filter device with magnetic member
JP2001104822A (ja) 磁性体粉除去装置
JPH09220417A (ja) 磁気フィルターおよび磁気マスク