WO1989001815A1 - Liquid filter - Google Patents

Liquid filter Download PDF

Info

Publication number
WO1989001815A1
WO1989001815A1 PCT/US1987/003324 US8703324W WO8901815A1 WO 1989001815 A1 WO1989001815 A1 WO 1989001815A1 US 8703324 W US8703324 W US 8703324W WO 8901815 A1 WO8901815 A1 WO 8901815A1
Authority
WO
WIPO (PCT)
Prior art keywords
circumferentially extending
housing
cylinder
wall
liquid filter
Prior art date
Application number
PCT/US1987/003324
Other languages
French (fr)
Inventor
Donald Irving Thornton
Richard Harding Peyton
Original Assignee
Allied Corporation
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 Allied Corporation filed Critical Allied Corporation
Publication of WO1989001815A1 publication Critical patent/WO1989001815A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D27/00—Cartridge filters of the throw-away type
    • B01D27/08—Construction of the casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D27/00—Cartridge filters of the throw-away type
    • B01D27/10—Safety devices, e.g. by-passes
    • B01D27/103—Bypass or safety valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D27/00—Cartridge filters of the throw-away type
    • B01D27/10—Safety devices, e.g. by-passes
    • B01D27/106—Anti-leakage or anti-return valves

Definitions

  • This invention relates to a liquid filter for filtering, for example, the lubricating oil of an internal combustion engine.
  • Liquid filters particularly those used to filter the lubricating oil of an internal combustion engine, are designed to facilitate removal of the old filter and installation of a new filter when the engine is serviced.
  • filters are normally of the so-called "spin on” type, which include a filtering media located within a pressure vessel. Since the pressure vessel must be sufficiently strong to withstand the relatively high hydraulic pressures generated in an internal combustion engine, the pressure vessels used in prior art automotive liquid filters have generally been made out of metal.
  • the present invention proposes a liquid filter which may be used, for example, for filtering the lubricating oil of an internal combustion engine, but which uses a pressure vessel or housing which is made out of plastic instead of metal.
  • the filter has been designed so that it is capable of withstanding the high hydraulic pressures involved in internal combustion engines, even though plastic is inherently weaker than the prior art metal containers.
  • Figure 1 is a longitudinal cross-sectional view of a liquid filter made pursuant to the teaching of the present invention.
  • Figure 2 is a plan view of the bottom of the filter illustrated in Figure 1.
  • a liquid filter generally indicated by the numeral 10 includes a housing generally indicated by the numeral 12.
  • the housing 12 includes a pair of body members 14, 16.
  • Body member 14 includes an outer circumferentially extending wall 18 and an upper end wall 20.
  • Upper end wall 20 includes a depressed, concave, dome portion 22.
  • Body member 16 includes a perforated tube 24 and a lower end wall 26.
  • the body member 14 includes a circumferentially extending, projecting portion 28 which projects towards the end wall 26 from the domed portion 22 of the end wall 20.
  • Projecting portion 28 terminates in a circumferentially extending engagement surface 30, which engages a corresponding engagement surface on the end of the tube 24.
  • the end wall 26 includes a circumferentially extending portion 32 which defines a circumferentially extending engagement surface 34 which engages a corresponding engagement surface on the end of the circumferentially extending wall 18. Accordingly, when the body members are assembled as illustrated in Figure 1, the tube 24 acts as a structural link which interconnects the upper end wall 20 with the lower end wall 26, thereby providing the filter 10 with the necessary structural rigidity to withstand the hydraulic pressures involved in an internal combustion engine. When the housing 12 is assembled, the tube 24 cooperates with the circumferentially extending wall 18 to define an annular chamber 36 therebetween.
  • a filtering media is installed in the chamber 36 before the body members 14, 16 are assembled.
  • the media 38 may be conventional pleated paper, consisting of a circumferentially extending array of radially tapered pleats generally indicated by the numeral 40 which are closed by upper and lower end caps 42, 44 which are glued to the upper and lower edges of the pleats. Since the filtering media 38 is conventional, it will not be discussed in detail herein.
  • the tube 24 is substantially cylinderical, defining a cavity 46 therein.
  • the cavity 46 communicates with the annular chamber 36 through the apertures 48, and also communicates with an outlet opening 49 which is carried by the lower end wall 26.
  • the outlet opening 49 is threaded as at 50 so that the filter 10 may be screwed upon the conventional post carried by the internal combustion engine.
  • a spring retainer generally indicated by the numeral 52 is mounted in the cavity 46.
  • a spring 54 extends between the retainer 52 and a bypass valve element 56 which extends circumferentially around the cavity 46 and is adapted to sealing engage circumferentially spaced bypass ports 58.
  • the lower end wall 26 is also provided with a circumferentially extending resilient seal 60 which is adapted to sealing engage a corresponding portion of the engine when the outlet opening 48 is mounted upon the aforementioned mounting post (not shown) .
  • Circumferentially spaced inlet openings generally indicated by the numeral 62 located radially inwardly of the seal 60 communicate the liquid filtrate into the annular chamber 36.
  • a resilient, annular, circumferentially extending, frustoconical, antidrainback valve 64 is mounted in the annular chamber 36 and circumscribes that portion of the lower end wall 26 through which the openings 62 extend. The resiliency of the member 64 permits the antidrainback valve 64 to deflect to permit liquid to flow into the chamber 36.
  • Circumferentially spaced ribs 66 are interposed between adjacent openings 62 and serve to strengthen and rigidify the lower end wall 26.
  • the media 38 - is installed within the body member 14.
  • the two body members 14, 16 are then joined at their engagement surfaces 30 and 32 by spin bonding, that is, one of the body members 14 or 16 is rotated relative to the other body member until sufficient heat is generated at the engagement surfaces 30 and 32 to partially melt the plastic of which the body members 14, 16 are molded, thus causing the two body members to fuse together at the engagement surfaces 30, 32.
  • the housing 12 is much better able to withstand deformation due to the hydraulic pressures of the oil pumped by the engine upon which the filter 10 is mounted. Accordingly, even though the body housing 12 is preferably made out of plastic, which is inherently weaker than steel and thus less able to withstand hydraulic forces, the reinforcement provided by the structural link of the tube 24 between the two end walls provides sufficient rigidity and strength to the housing 12 to enable the latter to withstand the hydraulic pressures normally generated in the oil lubricating system of an internal combustion engine.
  • the liquid filter 10 is used in the same way that a conventional liquid oil filter is used on current internal combustion engines; that is, the outlet opening 48 is screwed onto the aforementioned mounting post which extends from the mounting adapter of the -internal combustion engine on which the filter 10 is used.
  • the housing 12 is then tightened until the seal 60 sealing engages the corresponding surface on the vehicle engine.
  • oil is forced through the inlet openings 62, the media 38, and the openings 48 in the tube 24. Lubricating fluid then enters the cavity 46, whereupon it enters the engine through the outlet opening 48.
  • the filtering media 38 becomes clogged, the increased pressure differential between the chamber 36 and the cavity 46 overcomes the force of the spring 54, thereby permitting the high pressure fluid to open the bypass valve member 56 to permit fluid to flow directly to the outlet opening member 48 through the bypass ports 58.
  • the antidrainback valve member 64 deflects to prevent fluid from draining from the annular chamber 36 when the vehicle engine is turned off.

Abstract

A liquid filter for an internal combustion engine includes a housing having a pair of opposite end walls and a circumferentially extending side wall interconnecting the end walls. A centertube extends through the housing interconnecting the end walls and cooperates with the side wall to define an annular chamber which receives the filtering media. The centertube defines a rigid link interconnecting the end walls to reinforce the side wall, thereby permitting the housing to withstand relatively high hydraulic forces.

Description

LIQUID FILTER
This invention relates to a liquid filter for filtering, for example, the lubricating oil of an internal combustion engine.
Liquid filters, particularly those used to filter the lubricating oil of an internal combustion engine, are designed to facilitate removal of the old filter and installation of a new filter when the engine is serviced.
These filters are normally of the so-called "spin on" type, which include a filtering media located within a pressure vessel. Since the pressure vessel must be sufficiently strong to withstand the relatively high hydraulic pressures generated in an internal combustion engine, the pressure vessels used in prior art automotive liquid filters have generally been made out of metal. The present invention proposes a liquid filter which may be used, for example, for filtering the lubricating oil of an internal combustion engine, but which uses a pressure vessel or housing which is made out of plastic instead of metal. The filter has been designed so that it is capable of withstanding the high hydraulic pressures involved in internal combustion engines, even though plastic is inherently weaker than the prior art metal containers.
Use of the plastic housing simplifies and reduces the cost of the filter.
These and other advantages of the present invention will become apparent from the following description, with reference to the accompanying drawings, in which:
Figure 1 is a longitudinal cross-sectional view of a liquid filter made pursuant to the teaching of the present invention; and
Figure 2 is a plan view of the bottom of the filter illustrated in Figure 1.
Referring now to the drawings, a liquid filter generally indicated by the numeral 10 includes a housing generally indicated by the numeral 12. The housing 12 includes a pair of body members 14, 16. Body member 14 includes an outer circumferentially extending wall 18 and an upper end wall 20. Upper end wall 20 includes a depressed, concave, dome portion 22. Body member 16 includes a perforated tube 24 and a lower end wall 26. The body member 14 includes a circumferentially extending, projecting portion 28 which projects towards the end wall 26 from the domed portion 22 of the end wall 20.
Projecting portion 28 terminates in a circumferentially extending engagement surface 30, which engages a corresponding engagement surface on the end of the tube 24. The end wall 26 includes a circumferentially extending portion 32 which defines a circumferentially extending engagement surface 34 which engages a corresponding engagement surface on the end of the circumferentially extending wall 18. Accordingly, when the body members are assembled as illustrated in Figure 1, the tube 24 acts as a structural link which interconnects the upper end wall 20 with the lower end wall 26, thereby providing the filter 10 with the necessary structural rigidity to withstand the hydraulic pressures involved in an internal combustion engine. When the housing 12 is assembled, the tube 24 cooperates with the circumferentially extending wall 18 to define an annular chamber 36 therebetween. A filtering media, generally indicated by the numeral 38, is installed in the chamber 36 before the body members 14, 16 are assembled. The media 38 may be conventional pleated paper, consisting of a circumferentially extending array of radially tapered pleats generally indicated by the numeral 40 which are closed by upper and lower end caps 42, 44 which are glued to the upper and lower edges of the pleats. Since the filtering media 38 is conventional, it will not be discussed in detail herein.
The tube 24 is substantially cylinderical, defining a cavity 46 therein. The cavity 46 communicates with the annular chamber 36 through the apertures 48, and also communicates with an outlet opening 49 which is carried by the lower end wall 26. The outlet opening 49 is threaded as at 50 so that the filter 10 may be screwed upon the conventional post carried by the internal combustion engine. A spring retainer generally indicated by the numeral 52 is mounted in the cavity 46. A spring 54 extends between the retainer 52 and a bypass valve element 56 which extends circumferentially around the cavity 46 and is adapted to sealing engage circumferentially spaced bypass ports 58.
The lower end wall 26 is also provided with a circumferentially extending resilient seal 60 which is adapted to sealing engage a corresponding portion of the engine when the outlet opening 48 is mounted upon the aforementioned mounting post (not shown) . Circumferentially spaced inlet openings generally indicated by the numeral 62 located radially inwardly of the seal 60 communicate the liquid filtrate into the annular chamber 36. A resilient, annular, circumferentially extending, frustoconical, antidrainback valve 64 is mounted in the annular chamber 36 and circumscribes that portion of the lower end wall 26 through which the openings 62 extend. The resiliency of the member 64 permits the antidrainback valve 64 to deflect to permit liquid to flow into the chamber 36. through the openings 62, but prevents flow of liquid,in the reverse direction when the engine is shut off, thereby retaining the oil in the chamber 36. Circumferentially spaced ribs 66 are interposed between adjacent openings 62 and serve to strengthen and rigidify the lower end wall 26.
Upon assembly of the liquid filter 10, the media 38 -is installed within the body member 14. The two body members 14, 16 are then joined at their engagement surfaces 30 and 32 by spin bonding, that is, one of the body members 14 or 16 is rotated relative to the other body member until sufficient heat is generated at the engagement surfaces 30 and 32 to partially melt the plastic of which the body members 14, 16 are molded, thus causing the two body members to fuse together at the engagement surfaces 30, 32. Accordingly, the tube 24, since it is then an integral part of both the upper end wall 20 and the bottom end wall 26, serves as a rigid structural link between the two end walls thereby supplementing the structural link provided by the outer circumferentially extending wall 18. Accordingly, due to the structural stiffness provided by the tube 24, the housing 12 is much better able to withstand deformation due to the hydraulic pressures of the oil pumped by the engine upon which the filter 10 is mounted. Accordingly, even though the body housing 12 is preferably made out of plastic, which is inherently weaker than steel and thus less able to withstand hydraulic forces, the reinforcement provided by the structural link of the tube 24 between the two end walls provides sufficient rigidity and strength to the housing 12 to enable the latter to withstand the hydraulic pressures normally generated in the oil lubricating system of an internal combustion engine.
The liquid filter 10 is used in the same way that a conventional liquid oil filter is used on current internal combustion engines; that is, the outlet opening 48 is screwed onto the aforementioned mounting post which extends from the mounting adapter of the -internal combustion engine on which the filter 10 is used. The housing 12 is then tightened until the seal 60 sealing engages the corresponding surface on the vehicle engine. When the engine is then started, oil is forced through the inlet openings 62, the media 38, and the openings 48 in the tube 24. Lubricating fluid then enters the cavity 46, whereupon it enters the engine through the outlet opening 48. In the event the filtering media 38 becomes clogged, the increased pressure differential between the chamber 36 and the cavity 46 overcomes the force of the spring 54, thereby permitting the high pressure fluid to open the bypass valve member 56 to permit fluid to flow directly to the outlet opening member 48 through the bypass ports 58. The antidrainback valve member 64, as explained above, deflects to prevent fluid from draining from the annular chamber 36 when the vehicle engine is turned off.

Claims

CLAIMS 1. Liquid filter comprising a housing (12) defining a chamber (36) therewithin, said housing (12) including a circumferentially extending wall (18) and a pair of opposite end walls (20,26) closing the ends defined by said circumferentially extending wall (18), a filtering media (38) located in said chamber (36), and inlet means (62) and outlet means (50) carried by said housing (12) for communicating a liquid filtrate through said media (38) characterized in that said housing (12) includes structural means (24) extending through said chamber (36) defining a structural link separate from the circumferentially extending wall for interconnecting said end walls (20,26) for reinforcing and strengthening said housing (12) to permit the latter to withstand hydraulic pressures greater than that which the housing is capable of withstanding in the absence of said structural means (24).
2. Liquid filter as claimed in Claim 1, further characterized in that said structural means (24) is a member projecting though said chamber and cooperating with said circumferentially extending wall (18) to define an annular cavity therebetween, said filtering media (38) being located in said annular cavity.
3. Liquid filter as claimed in Claim 2, further characterized in that said structural means (24) is a cylinder extending through said chamber (36) and cooperating with said circumferentially extending wall (18) to define said annular cavity therebetween.
4. Liquid filter as claimed in Claim 3, further characterized in that said cylinder (24) defines a cavity (46) therewithin, said cylinder having perforations to permit the liquid filtrate to communicate through said perforations into the cavity defined within the cylinder, said outlet means (50) communicating with said cavity (46) defined within the cylinder (24).
5. Liquid filter as claimed in Claim 4, further characterized in that said media (38) is pleated to define an annular array of radially tapering pleats, said array circumscribing said cylinder (24).
6. Liquid filter as claimed in Claim 4, further characterized in that said outlet means (50) is an opening in one of said end walls (26) communicating with said cavity defined within said cylinder (24) and said inlet means (62) is a series of circumferentially spaced apertures in said one end wall (26) circumscribing said opening (50) in said one end wall, and circumferentially spaced radially extending ribs (66) between said apertures to strengthen said one end wall.
7. Liquid filter as claimed in Claim 4, further characterized in that said housing (12) comprises a pair of body members (14,16), one of said body members (16) including one of said end walls (26) and at least a portion of said cylinder projecting from said one end wall, the other body member (14) including the other end wall (20) and at least a portion of said circumferentially extending wall (18) projecting from said other end wall, said cylinder portion terminating in a circumferentially extending engagement surface (30) for engagement with a corresponding engagement surface on the other body member (20), said portion of said circumferentially extending wall (18) terminating in a circumferentially extending area (34) for engagement with a corresponding area on said one body member.
8. Liquid filter as claimed in Claim 1, further characterized in that said housing (12) comprises a pair of body members (14,16), one of said body members (16) including one of said end walls (26) and at least a portion of said structural link (24) projecting from said one end wall (26), the other body member (14) including the other end wall (20) and at least a portion of said circumferentially extending wall (18) projecting from said other end wall, said structural link terminating in a circumferentially extending engagement surface (30) for engagement with a corresponding engagement surface on the other body member (14), said portion of said circumferentially extending wall (18) terminating in a circumferentially extending area (34) for engagement with a corresponding area on said one body member.
PCT/US1987/003324 1987-08-26 1987-12-15 Liquid filter WO1989001815A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8971387A 1987-08-26 1987-08-26
US089,713 1987-08-26

Publications (1)

Publication Number Publication Date
WO1989001815A1 true WO1989001815A1 (en) 1989-03-09

Family

ID=22219223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1987/003324 WO1989001815A1 (en) 1987-08-26 1987-12-15 Liquid filter

Country Status (2)

Country Link
AU (1) AU1109288A (en)
WO (1) WO1989001815A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5549821A (en) * 1993-09-29 1996-08-27 Fleetguard, Inc. Fluid filter assembly for vehicles
US5556542A (en) * 1993-09-29 1996-09-17 Fleetguard, Inc. Fluid filter assembly
US6221242B1 (en) * 1996-12-17 2001-04-24 Dei-Tec Corporation Renewable filter with a bypass valve
DE19781179B4 (en) * 1996-11-08 2004-06-24 Champion Laboratories Inc., West Salem Non-metallic, replaceable filter
DE202005014690U1 (en) * 2005-09-16 2007-02-01 Mann + Hummel Gmbh Filter element for industrial liquid filtration without using containment housing has fluted filter element inside cylindrical injection molded, perforated, plastics support
DE102009036475A1 (en) * 2009-08-07 2011-02-10 Mahle International Gmbh Filter device and wound filter element

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1374947A (en) * 1963-11-23 1964-10-09 Knecht Filterwerke Gmbh Lubricating oil filter, especially for internal combustion engines
FR2108619A5 (en) * 1969-02-27 1972-05-19 Eberle John
GB1355832A (en) * 1971-03-30 1974-06-05 Automotive Prod Co Ltd Filters for liquids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1374947A (en) * 1963-11-23 1964-10-09 Knecht Filterwerke Gmbh Lubricating oil filter, especially for internal combustion engines
FR2108619A5 (en) * 1969-02-27 1972-05-19 Eberle John
GB1355832A (en) * 1971-03-30 1974-06-05 Automotive Prod Co Ltd Filters for liquids

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5549821A (en) * 1993-09-29 1996-08-27 Fleetguard, Inc. Fluid filter assembly for vehicles
US5556542A (en) * 1993-09-29 1996-09-17 Fleetguard, Inc. Fluid filter assembly
DE19781179B4 (en) * 1996-11-08 2004-06-24 Champion Laboratories Inc., West Salem Non-metallic, replaceable filter
US6221242B1 (en) * 1996-12-17 2001-04-24 Dei-Tec Corporation Renewable filter with a bypass valve
US6568539B1 (en) 1996-12-17 2003-05-27 Dei-Tec Corporation Renewable filter with a bypass valve
US6716361B2 (en) * 1996-12-17 2004-04-06 Dei-Tec Corporation Renewable filter
DE202005014690U1 (en) * 2005-09-16 2007-02-01 Mann + Hummel Gmbh Filter element for industrial liquid filtration without using containment housing has fluted filter element inside cylindrical injection molded, perforated, plastics support
DE102009036475A1 (en) * 2009-08-07 2011-02-10 Mahle International Gmbh Filter device and wound filter element

Also Published As

Publication number Publication date
AU1109288A (en) 1989-03-31

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