WO1997026977A1 - Magnetic filter assembly - Google Patents

Magnetic filter assembly Download PDF

Info

Publication number
WO1997026977A1
WO1997026977A1 PCT/US1997/000772 US9700772W WO9726977A1 WO 1997026977 A1 WO1997026977 A1 WO 1997026977A1 US 9700772 W US9700772 W US 9700772W WO 9726977 A1 WO9726977 A1 WO 9726977A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
housing
band
filter
filter assembly
Prior art date
Application number
PCT/US1997/000772
Other languages
French (fr)
Inventor
Carlton R. Williamson
Original Assignee
Williamson Carlton R
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 Williamson Carlton R filed Critical Williamson Carlton R
Priority to AU22436/97A priority Critical patent/AU2243697A/en
Publication of WO1997026977A1 publication Critical patent/WO1997026977A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/28Magnetic plugs and dipsticks
    • B03C1/288Magnetic plugs and dipsticks disposed at the outer circumference of a recipient
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06Filters making use of electricity or magnetism

Definitions

  • the present invention relates to devices for filtering particulate matter from the fluid lubricant of an engine, and more particularly concerns the use of magnetic forces in hindering the movement of particulate matter which is magnetically attractive through such filtering devices.
  • FIG. 1 is a side elevational view of a preferred embodiment of a magnetic filter housing according to the present invention
  • FIG. 2 is an enlarged partial cross section view of the embodiment of FIG. 1 , along line 2 - 2;
  • FIG. 3 is an enlarged planar view of a portion of the cross section of FIG. 2.
  • the present invention comprises an improved removable magnetic filter assembly for use in a fluid lubrication system, said assembly having an internal filter element through which a lubricant flows, such as those fibrous particulate filter elements which are typically used with combustion engines, and further including a substantially cylindrical magnetic filter housing having a side wall, a closed first end and a partially open second end.
  • the second end of he filter housing includes connective conduit means by which the filter assembly is attached to a lubrication system, and through which a lubricant may flow from said lubrication system into the filter housing, and out of the filter housing back into said lubrication system.
  • the filter assembly further includes magnetic flow-restriction means affixed to the inside surface of the housing for magnetically attracting metallic particles from the fluid flow within the filter.
  • FIG's 1 , 2 and 3 illustrate an embodiment of a magnetic filter assembly 10 according to the present invention, for use with a fluid lubrication system (not shown).
  • the filter assembly 10 comprises a filter housing 12 which includes a hollow cylindrical side wall 14, a closed end 16 and a semi-open end 18.
  • the semi-open end 18 includes connective conduit means 20 by which the filter assembly 10 is attached to a lubrication system (not shown).
  • the connective conduit means 20 further includes a plurality of intake conduits 22 through which a lubricant may flow from said lubrication system into the filter housing 12, and at least one exhaust conduit 24 through which said lubricant may flow out of the filter housing 12 back into said lubrication system.
  • a hollow cylindrical fibrous particulate filter 26 is further affixed inside the filter housing and in communication with the exhaust conduit 24. As a fluid lubricant flows through the intake conduits 22, it is directed around the fibrous particulate filter 26, toward the interior surface of the cylindrical wall 14 (FIG. 1).
  • the filter housing 12 of the present invention further includes at least one magnetic-band engaging channel 28 which circumscribes the interior surface of the wall 14, and in which a magnetic band 30 is affixed.
  • Each channel 28 is formed in the side wall 14 via means which are known, and includes upper and lower flanges 32 connecting the side wall 14 to a substantially flat interior wall 34 of said channel 28.
  • the housing 12 diameter in each channel 28 is greater than the housing 12 diameter between non-channeled portions of the wall 14.
  • Each magnetic band 30 is affixed along an outside surface 36 of said band to the interior wall 34 of the corresponding channel 28. It is preferred that the width of each band 30 is substantially equal to the width of the interior wall 34 of the corresponding channel 28.
  • each band 30 is preferably greater than the depth of the corresponding channel 28, such that a diameter of the housing 12 drawn between interior surfaces 37 of said band 30 is less than the diameter of the housing 12 which is drawn between non-channeled portions of the wall 14.
  • each band 30 creates upper and lower magnetic shelves 38 along the interior surface of the side wall 14, around which lubricating fluid flowing through the filter assembly 10 must pass as it flows between the wall 14 and the porous particulate filter 26 (FIG. 3).

Abstract

A removable magnetic filter assembly for use in a fluid lubrication system is disclosed herein. The assembly includes a substantially cylindrical magnetic filter housing (12) having a side wall (14). The filter assembly further includes magnetic band (30) affixed within a magnetic band engaging channel (28) in the housing for magnetically attracting metallic particles from fluid flow through the filter assembly.

Description

MAGNETIC FILTER ASSEMBLY
RELATED DISCLOSURE
This application is a continuation-in-part of an application which was originally filed in the United States Patent and Trademark Office on 24 January 1996 (24.01.96) and entitled Magnetic Filter ASSEMBLY, and having serial number 60/010,537.
BACKGROUND OF THE INVENTION
The present invention relates to devices for filtering particulate matter from the fluid lubricant of an engine, and more particularly concerns the use of magnetic forces in hindering the movement of particulate matter which is magnetically attractive through such filtering devices.
Many magnetic filtering devices have been proposed in the prior art for hindering the movement of particulate matter which is magnetically attractive through an engine lubrication system. Examples of such devices can be found in the following U S Letters Patent: Nbr. 5,282,963 by Hull et al; Nbr. 5,273,648 by Caiozza; Nbr. 5,228,990 by Chiang; Nbr. 5,089,129 by Brigman; Nbr. 5,078,871 by McCready; Nbr.'s
5,009,779, 4,642,183 and 4,501,660 by Hebert; Nbr. 4,894,153 by Sirdavant; Nbr. 4,839,044 by Tomita; Nbr. 4,826,592 by Taylor; Nbr. 4,629,558 by Garritty; Nbr. 4,613,435 by Shoemaker; Nbr. 4,450,075 by Krow; Nbr. 4,446,019 by Robinson; Nbr. 4,218,320 by Liaw; Nbr. 4,067,810 by Sullivan; Nbr. 4,052,312 by King; Nbr. 3,887,469 by Hayashi; and Nbr. 3,480,145 by Gladden. While these devices may be suitable for a particular purpose to which they address, it will be apparent to those skilled in the art that said devices would not be as suitable for the purposes of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description. Such description makes reference to the appended drawings, wherein:
FIG. 1 is a side elevational view of a preferred embodiment of a magnetic filter housing according to the present invention;
FIG. 2 is an enlarged partial cross section view of the embodiment of FIG. 1 , along line 2 - 2; and
FIG. 3 is an enlarged planar view of a portion of the cross section of FIG. 2.
DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS
The present invention comprises an improved removable magnetic filter assembly for use in a fluid lubrication system, said assembly having an internal filter element through which a lubricant flows, such as those fibrous particulate filter elements which are typically used with combustion engines, and further including a substantially cylindrical magnetic filter housing having a side wall, a closed first end and a partially open second end. The second end of he filter housing includes connective conduit means by which the filter assembly is attached to a lubrication system, and through which a lubricant may flow from said lubrication system into the filter housing, and out of the filter housing back into said lubrication system. The filter assembly further includes magnetic flow-restriction means affixed to the inside surface of the housing for magnetically attracting metallic particles from the fluid flow within the filter. One embodiment of the instant invention is illustrated in the appended drawings and described in greater detail, below. (All like numerical designations in the figures represent the same element.) FIG's 1 , 2 and 3 illustrate an embodiment of a magnetic filter assembly 10 according to the present invention, for use with a fluid lubrication system (not shown). The filter assembly 10 comprises a filter housing 12 which includes a hollow cylindrical side wall 14, a closed end 16 and a semi-open end 18. The semi-open end 18 includes connective conduit means 20 by which the filter assembly 10 is attached to a lubrication system (not shown). The connective conduit means 20 further includes a plurality of intake conduits 22 through which a lubricant may flow from said lubrication system into the filter housing 12, and at least one exhaust conduit 24 through which said lubricant may flow out of the filter housing 12 back into said lubrication system. A hollow cylindrical fibrous particulate filter 26 is further affixed inside the filter housing and in communication with the exhaust conduit 24. As a fluid lubricant flows through the intake conduits 22, it is directed around the fibrous particulate filter 26, toward the interior surface of the cylindrical wall 14 (FIG. 1). As the lubricating fluid flows adjacent the wall 14, it is drawn into and through the fibrous particulate filter 26 by a vacuum force generated by the portion of the lubricating system which is in communication with the exhaust conduit 24. After the lubricating fluid flows through the fibrous particulate filter 26, it is then drawn toward and through the exhaust conduit 26. (See the dotted- line arrows in FIG. 1.) Thus far, the description of the instant invention parallels that of typical cylindrical fluid lubrication filters of the prior art.
The filter housing 12 of the present invention, however, further includes at least one magnetic-band engaging channel 28 which circumscribes the interior surface of the wall 14, and in which a magnetic band 30 is affixed. Each channel 28 is formed in the side wall 14 via means which are known, and includes upper and lower flanges 32 connecting the side wall 14 to a substantially flat interior wall 34 of said channel 28. The housing 12 diameter in each channel 28 is greater than the housing 12 diameter between non-channeled portions of the wall 14. Each magnetic band 30 is affixed along an outside surface 36 of said band to the interior wall 34 of the corresponding channel 28. It is preferred that the width of each band 30 is substantially equal to the width of the interior wall 34 of the corresponding channel 28. The depth of each band 30, however, is preferably greater than the depth of the corresponding channel 28, such that a diameter of the housing 12 drawn between interior surfaces 37 of said band 30 is less than the diameter of the housing 12 which is drawn between non-channeled portions of the wall 14. Thus, each band 30 creates upper and lower magnetic shelves 38 along the interior surface of the side wall 14, around which lubricating fluid flowing through the filter assembly 10 must pass as it flows between the wall 14 and the porous particulate filter 26 (FIG. 3).
As said lubricating fluid passes around the magnetic shelves 38, magnetically attractive particulate matter 39 is drawn from said fluid into contact with the band 30. It is believed that as greater amounts of such magnetically attractive particles 39 are thus pulled from said lubricating fluid, that such particles will build up in spaces 40 between the flanges 32 of the channels 28 and the magnetic shelves 38 of the bands 30, as such spaces 40 are somewhat out of the main flow path of the lubricating fluid around the magnetic band 30. Particles 39 which are in such magnetic contact with the magnetic band 30, are thereby protected from fluid forces which may be in said main fluid flow path.
The inventor has given a non-limiting description of a preferred embodiment of the present invention, to which many changes may be made without deviating from the spirit of the invention. While this invention has been described with reference to an illustrative embodiment, this description is not intended to be construed in a limiting sense. Various modifications and combinations of the preferred embodiment, as well as other embodiments of this invention, will be apparent to a person skilled in the art upon reference to this description. It is therefore contemplated that the appended claims cover any such modifications and/or embodiments that fall within the true scope of the present invention.

Claims

CLAIMSWhat is claimed is:
1. A removable magnetic filter assembly for use in a fluid lubrication system, said assembly comprising: a filter housing including a hollow cylindrical side wall, a closed end and a semi-open end; said semi-open end including connective conduit means by which the filter assembly is attached to a lubrication system; said connective conduit means further including a plurality of intake conduits through which a lubricant may flow from said lubrication system into the filter housing, and at least one exhaust conduit through which said lubricant may flow out of the filter housing back into said lubrication system; a hollow cylindrical fibrous particulate filter is further affixed inside the filter housing and in communication with the exhaust conduit; at least one magnetic-band engaging channel circumscribing the interior surface of the housing wall; and a magnetic band affixed within said at least one magnetic-band engaging channel.
2. The magnetic filter assembly as recited in claim 1 , wherein each engaging channel is formed in the housing side wall and includes upper and lower flanges connecting the housing side wall to a substantially flat interior wall of said channel.
3. The magnetic filter assembly as recited in claim 2, wherein the housing diameter at each engaging channel is greater than the housing diameter between non-channeled portions of the housing wall.
4. The magnetic filter assembly as recited in claim 2, wherein said magnetic band is affixed along an outside surface of the band to the interior wall of each engaging channel.
5. The magnetic filter assembly as recited in claim 4, wherein the width of each magnetic band is substantially equal to the width of the interior wall of the engaging channel in which said band is affixed.
6. The magnetic fitter assembly as recited in claim 5, further wherein the depth of each magnetic band is greater than the depth of the engaging channel in which said band is affixed, such that a diameter of the housing drawn between interior surfaces of said magnetic band is less than the diameter of the housing which is drawn between non-channeled portions of the wall.
PCT/US1997/000772 1996-01-24 1997-01-24 Magnetic filter assembly WO1997026977A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22436/97A AU2243697A (en) 1996-01-24 1997-01-24 Magnetic filter assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1053796P 1996-01-24 1996-01-24
US60/010,537 1996-01-24

Publications (1)

Publication Number Publication Date
WO1997026977A1 true WO1997026977A1 (en) 1997-07-31

Family

ID=21746213

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/000772 WO1997026977A1 (en) 1996-01-24 1997-01-24 Magnetic filter assembly

Country Status (2)

Country Link
AU (1) AU2243697A (en)
WO (1) WO1997026977A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007006817A1 (en) 2005-07-12 2007-01-18 Centro De Investigación De Rotación Y Torque Aplicada, S.L. C.I.F. B83987073 Filter for capturing polluting emissions

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556540A (en) * 1994-06-30 1996-09-17 Brunsting; William J. Magnetic assembly for a closed pressurized flow path of lubricating oil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556540A (en) * 1994-06-30 1996-09-17 Brunsting; William J. Magnetic assembly for a closed pressurized flow path of lubricating oil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007006817A1 (en) 2005-07-12 2007-01-18 Centro De Investigación De Rotación Y Torque Aplicada, S.L. C.I.F. B83987073 Filter for capturing polluting emissions

Also Published As

Publication number Publication date
AU2243697A (en) 1997-08-20

Similar Documents

Publication Publication Date Title
US4067810A (en) Fluid filter magnet assembly
US3800914A (en) Magnetic filter for lubricants
CA2468507A1 (en) Filter cartridge assemblies and methods of filtering fluids
US5032259A (en) Friction-reducing lubricating-oil filter for internal combustion engine
CA1311427C (en) Integrated separator for solid and gaseous contaminants in a fluid
EP1158144B1 (en) Space efficient exhaust aftertreatment filter
US3890232A (en) Fluid filter
US4292179A (en) Spin-on filter coalescer unit with flow reversing baffle assembly
ATE206630T1 (en) FILTER, ESPECIALLY FOR FILTRING THE LUBRICANT OIL OF AN INTERNAL COMBUSTION ENGINE
WO1993003266A1 (en) Combination in line air-filter/air-oil separator/air-silencer
CA2244272A1 (en) Filter element for oil pans and filter element/oil pan combination
US5935281A (en) Filter apparatus
KR960013425A (en) Filters, especially for filtering intake air from internal combustion engines
US4894153A (en) Magnetic attachment for a filter
CA2192769A1 (en) Self-Cleaning Air Filter Assembly
US6207050B1 (en) Magnetic core for an oil filter
JP2001503323A (en) Filter insert
US3279607A (en) Oil filter cartridge
WO1997026977A1 (en) Magnetic filter assembly
US5679244A (en) Spin-on liquid filter with unique straight through flow path
US4889037A (en) Chamber equipped with a breather opening to the atmosphere
DE59104371D1 (en) Valve, in particular for the lubricating oil filter of an internal combustion engine.
WO1990003836A1 (en) Disposable air filter
WO2020064204A1 (en) Air de-oiling insert for an air de-oiling device and air de-oiling device
KR19980080029A (en) Separator

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BR CA CN CZ DE DK ES FI GB GE HU JP KR LU NO NZ PL PT RO RU SE UA US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
122 Ep: pct application non-entry in european phase
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642