GB2191959A - Fluid filter element - Google Patents

Fluid filter element Download PDF

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Publication number
GB2191959A
GB2191959A GB08714740A GB8714740A GB2191959A GB 2191959 A GB2191959 A GB 2191959A GB 08714740 A GB08714740 A GB 08714740A GB 8714740 A GB8714740 A GB 8714740A GB 2191959 A GB2191959 A GB 2191959A
Authority
GB
United Kingdom
Prior art keywords
sealing member
outer peripheral
sealing
annular
groove
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.)
Granted
Application number
GB08714740A
Other versions
GB2191959B (en
GB8714740D0 (en
Inventor
Dennis Albert George Marshall
Ralph Hart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MACH CONTROL Ltd
Original Assignee
MACH CONTROL Ltd
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 MACH CONTROL Ltd filed Critical MACH CONTROL Ltd
Publication of GB8714740D0 publication Critical patent/GB8714740D0/en
Publication of GB2191959A publication Critical patent/GB2191959A/en
Application granted granted Critical
Publication of GB2191959B publication Critical patent/GB2191959B/en
Expired legal-status Critical Current

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
    • 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
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • 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
    • B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/34—Seals or gaskets for filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2271/02—Gaskets, sealings
    • B01D2271/027—Radial sealings

Abstract

A fluid filter element (12, 14) has a cylindrical casing which receives the inner peripheral portion of a flat annular sealing member (30) made of a soft-flexible sealing material, for example, neoprene, with the radially-projecting outer peripheral portion of the sealing member being partially shielded on both sides by rigid surfaces such as spaced ridges (32, 34) or the sides of a groove of arcuate section wherein the member (30) is located (Figure 2). Member 30 seals against a duct wherein the element is mounted, and the rigid surfaces protect and support the member. <IMAGE>

Description

SPECIFICATION Fluid filter element This invention relates to fluid filter elements and is especially concerned with filter elements comprising a generally cylindrical casing adapted to be plugged into a wall or located in a cylindrical ortubular holder.
In EP-A-0132095 in the name of D.A.G. Marshall and published on 23rd January 1985, there is described and illustrated a fluid filter element having a casing, flange, ring or equivalent part which is adapted for insertion in a wall or other holder and which is provided with at least one annular sealing member of softflexible sealing material, for example, neoprene, having its inner peripheral portion rooted in the casing or equivalent partand its outer peripheral portion projecting radially therefrom, the cross-section of the sealing member being of substantially rectangularform with a width greaterthan its thickness so that the sealing member asawholeresemblesathinannulardiscwiththe outer peripheral portion of the sealing member being easilyflexedunderpressureoutofitsradial disposition.
The present invention is concerned with an improvement in thatform offluid filter element and has as its aim the provision of means which allowthe sealing membertofunction more efficiently and to last longer.
With this aim in view, the portion of the annu lar sealing member projecting from the casing or equivalent part is partially shielded on either side by a rigid surface.
The two rigid surfaces which partially shield both sides of the sealing member can be formd by two spaced-apart annular ridges- one on each side ofthe sealing member- or by an annular groove in the casing or equivalent part which is of arcuate or semi-circular section with the root portion of the sealing member being securely rooted in a narrow section groove at the base ofthe arcuate groove.
Examples offluid filter elements in accordance with the invention are shown in the accompanying drawing, in which Figure l is a section through a cylindrical holder within which are located two juxta-posed flu id filter elements each having two sealing members which are shielded in the manner described above; Figure 2 is an enlarged sectional view of any one of the said sealing members to illustrate the way in which each sealing member is shielded on either side by a support surface; and Figure3 is a view similar to Figure 2to illustrate a modification.
Figure 1 shows a cylindrical support or duct 10 within which are located two fluid filter elements 12 and 14. The fluid filter element 12 is one provided with cellular layers 1 6 the cells of which arefilled with activated carbon particles to remove noxious substancesfrom air or other gaseous streams. As for the filter element 14,this is in the form of a so-called high-efficencyfilterhaving a pleated filtering medium 18 which is able to filter out all butthevery smallest particles in an air or other gaseous stream passed through it. It is however to be understood that the filtering media used in the two filters is not relevant as far as the present invention is concerned.
The end portions of each filter comprise respective annular flanges or rings 20,22. On the outer peripheral portions of all four rings or flanges 20and 22 there is an annular groove 24 of arcuate or semi-circular section as shown in Figure 2. At the deepest part ofthisgroovethere is afurther narrow groove 26 which receives the inner peripheral portion 28 of a respective annular sealing member 30. This sealing member has all the characteristics of those shown in EP-A-01 32095 in that it is made of a soft, flexible sealing material, for example, neoprene, with the outer peripheral portion ofthe sealing member projecting radially from the ring or flange 20 or 22 to which it is secured.The cross-section of the sealing member 30 is of substantially rectangularform with its width being greaterthan its thickness so that the sealing member as a whole comprises a thin annular disc with the outer peripheral portion being easily flexed under pressure out of its radial disposition when the respectivefilterelement is inserted axially in the cylindrical holder or duct 10.
It will therefore be seen that, in contrast to the construction shown in EP-A-0132095,the portion of each annular sealing member 30 prnjecting from the narrow groove 26 is shielded on either side by a curved supporting surface formed by the arcuate or semi-circular section groove 24. The curved surface of that groove on either side of its respective annular sealing member 30therefore serves to restrict lateral flexing movement of the sealing member and to support it when it is flexed beyond a certain point.
This therefore gives protection forthe seal against undue flexing which might otherwise damage it, and it also increases the life of the seal.
It will be seen that the outer peripheral extremity of each ring or flange 20, 22 approaches very close to the inner cylindrical surface of the holder 10. This meansthat only the outer peripheral extremity of each sealing member30 projects radially beyond the outer peripheral extremity of the respective ring or flange 20,22. This again ensures that the four sealing members 30 are not subjected to undue stresses which might otherwise damage them.
A modification of the above-described construction is shown in Figure 3 where the sealing member 30 is shielded bytwo spaced-apart annular ridges 32 and 34- one on each side of the sealing member which project radially outwards from the outer cylindrical surfaces of either the filter element 12 orthe filter element 14. The function ofthesetwo ridges is the same as that of the two curved surfaces of the semi-circular section groove 24 on either side ofthe sealing member shown in Figure 2.
1. Afluid filter element comprising a generally cylindrical casing adapted to be plugged into a wall or located in a cylindrical ortubular holder, the casing being provided with at least one annular
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Fluid filter element This invention relates to fluid filter elements and is especially concerned with filter elements comprising a generally cylindrical casing adapted to be plugged into a wall or located in a cylindrical ortubular holder. In EP-A-0132095 in the name of D.A.G. Marshall and published on 23rd January 1985, there is described and illustrated a fluid filter element having a casing, flange, ring or equivalent part which is adapted for insertion in a wall or other holder and which is provided with at least one annular sealing member of softflexible sealing material, for example, neoprene, having its inner peripheral portion rooted in the casing or equivalent partand its outer peripheral portion projecting radially therefrom, the cross-section of the sealing member being of substantially rectangularform with a width greaterthan its thickness so that the sealing member asawholeresemblesathinannulardiscwiththe outer peripheral portion of the sealing member being easilyflexedunderpressureoutofitsradial disposition. The present invention is concerned with an improvement in thatform offluid filter element and has as its aim the provision of means which allowthe sealing membertofunction more efficiently and to last longer. With this aim in view, the portion of the annu lar sealing member projecting from the casing or equivalent part is partially shielded on either side by a rigid surface. The two rigid surfaces which partially shield both sides of the sealing member can be formd by two spaced-apart annular ridges- one on each side ofthe sealing member- or by an annular groove in the casing or equivalent part which is of arcuate or semi-circular section with the root portion of the sealing member being securely rooted in a narrow section groove at the base ofthe arcuate groove. Examples offluid filter elements in accordance with the invention are shown in the accompanying drawing, in which Figure l is a section through a cylindrical holder within which are located two juxta-posed flu id filter elements each having two sealing members which are shielded in the manner described above; Figure 2 is an enlarged sectional view of any one of the said sealing members to illustrate the way in which each sealing member is shielded on either side by a support surface; and Figure3 is a view similar to Figure 2to illustrate a modification. Figure 1 shows a cylindrical support or duct 10 within which are located two fluid filter elements 12 and 14. The fluid filter element 12 is one provided with cellular layers 1 6 the cells of which arefilled with activated carbon particles to remove noxious substancesfrom air or other gaseous streams. As for the filter element 14,this is in the form of a so-called high-efficencyfilterhaving a pleated filtering medium 18 which is able to filter out all butthevery smallest particles in an air or other gaseous stream passed through it. It is however to be understood that the filtering media used in the two filters is not relevant as far as the present invention is concerned. The end portions of each filter comprise respective annular flanges or rings 20,22. On the outer peripheral portions of all four rings or flanges 20and 22 there is an annular groove 24 of arcuate or semi-circular section as shown in Figure 2. At the deepest part ofthisgroovethere is afurther narrow groove 26 which receives the inner peripheral portion 28 of a respective annular sealing member 30. This sealing member has all the characteristics of those shown in EP-A-01 32095 in that it is made of a soft, flexible sealing material, for example, neoprene, with the outer peripheral portion ofthe sealing member projecting radially from the ring or flange 20 or 22 to which it is secured.The cross-section of the sealing member 30 is of substantially rectangularform with its width being greaterthan its thickness so that the sealing member as a whole comprises a thin annular disc with the outer peripheral portion being easily flexed under pressure out of its radial disposition when the respectivefilterelement is inserted axially in the cylindrical holder or duct 10. It will therefore be seen that, in contrast to the construction shown in EP-A-0132095,the portion of each annular sealing member 30 prnjecting from the narrow groove 26 is shielded on either side by a curved supporting surface formed by the arcuate or semi-circular section groove 24. The curved surface of that groove on either side of its respective annular sealing member 30therefore serves to restrict lateral flexing movement of the sealing member and to support it when it is flexed beyond a certain point. This therefore gives protection forthe seal against undue flexing which might otherwise damage it, and it also increases the life of the seal. It will be seen that the outer peripheral extremity of each ring or flange 20, 22 approaches very close to the inner cylindrical surface of the holder 10. This meansthat only the outer peripheral extremity of each sealing member30 projects radially beyond the outer peripheral extremity of the respective ring or flange 20,22. This again ensures that the four sealing members 30 are not subjected to undue stresses which might otherwise damage them. A modification of the above-described construction is shown in Figure 3 where the sealing member 30 is shielded bytwo spaced-apart annular ridges 32 and 34- one on each side of the sealing member which project radially outwards from the outer cylindrical surfaces of either the filter element 12 orthe filter element 14. The function ofthesetwo ridges is the same as that of the two curved surfaces of the semi-circular section groove 24 on either side ofthe sealing member shown in Figure 2. CLAIMS
1. Afluid filter element comprising a generally cylindrical casing adapted to be plugged into a wall or located in a cylindrical ortubular holder, the casing being provided with at least one annular sealing member of neoprene orothersoftflexible sealing material having its inner peripheral portion rooted in the casing ora partthereon and its outer peripheral portion projecting radially therefrom, the cross-section ofthe sealing member being of substantially rectangularform with a width greater than its thickness so that the sealing member as a whole resembles a thin annular dise with the outer peripheral portion of the sealing member being easilyflexed under pressure out ot its radial disposition, in which, to allowthe sealing memberto function more efficiently and to last longer than it would otherwise, the portion of the annular sealing memberprojectingfromthecasingora partthereon is partially shielded on either side by a rigid surface.
2. Afilter element according to claim 1, in which the two rigid surfaces partially shielding the sealing member are formed bytwo spaced-apart annular ridges- one on each side ofthe sealing member.
3. Afilter element according to claim 1, in which the two rigid surfaces partially shielding the sealing memberareformed by an annular groove in the casing or a part thereon which is of arcuate or semi-circularsection with the root portion ofthe sealing member being securely rooted in a narrow section groove at the base ofthe arcuate groove.
4. Afilter element according to any one of claims 1-3, in which the radially outer peripheral extremity of each rigid surface is adapted to approach very close to the inner cylindrical surfaces of the holderso thatonlythe radially-outer peripheral extremity of the sealing member projects radially beyond the radially-outer peripheral extremities of the rigid surfaces.
5. Afilter element according to claim 1 substantially as described herein with reference to Figures 1 and 2, or as modified by Figure 3, of the accompanying drawing.
GB8714740A 1986-06-26 1987-06-24 Fluid filter element Expired GB2191959B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868615672A GB8615672D0 (en) 1986-06-26 1986-06-26 Fluid filter element

Publications (3)

Publication Number Publication Date
GB8714740D0 GB8714740D0 (en) 1987-07-29
GB2191959A true GB2191959A (en) 1987-12-31
GB2191959B GB2191959B (en) 1989-12-13

Family

ID=10600163

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868615672A Pending GB8615672D0 (en) 1986-06-26 1986-06-26 Fluid filter element
GB8714740A Expired GB2191959B (en) 1986-06-26 1987-06-24 Fluid filter element

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868615672A Pending GB8615672D0 (en) 1986-06-26 1986-06-26 Fluid filter element

Country Status (1)

Country Link
GB (2) GB8615672D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19527843A1 (en) * 1995-07-29 1997-01-30 Knecht Filterwerke Gmbh Filter element and tightly fitting, detachable internal support having conical mating surfaces - subjected to inward flow under pressure yet easily sepd. for replacement and held coaxially in filter casing lid with sealing by soft oversized end covers on filter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132095A2 (en) * 1983-07-15 1985-01-23 United Kingdom Atomic Energy Authority Fluid filter element

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132095A2 (en) * 1983-07-15 1985-01-23 United Kingdom Atomic Energy Authority Fluid filter element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19527843A1 (en) * 1995-07-29 1997-01-30 Knecht Filterwerke Gmbh Filter element and tightly fitting, detachable internal support having conical mating surfaces - subjected to inward flow under pressure yet easily sepd. for replacement and held coaxially in filter casing lid with sealing by soft oversized end covers on filter
DE19527843B4 (en) * 1995-07-29 2008-05-08 Mahle Filtersysteme Gmbh Oil or fuel filter device of an internal combustion engine

Also Published As

Publication number Publication date
GB2191959B (en) 1989-12-13
GB8615672D0 (en) 1986-07-30
GB8714740D0 (en) 1987-07-29

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20070623