GB2227430A - Air filter - Google Patents
Air filter Download PDFInfo
- Publication number
- GB2227430A GB2227430A GB8827971A GB8827971A GB2227430A GB 2227430 A GB2227430 A GB 2227430A GB 8827971 A GB8827971 A GB 8827971A GB 8827971 A GB8827971 A GB 8827971A GB 2227430 A GB2227430 A GB 2227430A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wall
- fluid
- filtering element
- annular
- filtering
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 3
- 230000001413 cellular effect Effects 0.000 claims abstract description 3
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims description 34
- 239000012530 fluid Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 206010037660 Pyrexia Diseases 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 239000000565 sealant Substances 0.000 claims description 2
- 239000003566 sealing material Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000011347 resin Substances 0.000 abstract 2
- 229920005989 resin Polymers 0.000 abstract 2
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
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
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
An air filter element comprises a tubular wall 12 with a filter medium 18 extending completely across its interior and an annular wall 24 at one end having an inner soil flexible sealing ring 30 of flat cross-section designed to seal round a spigot 34 in the enclosing housing. Filter medium 18 may be pleated paper, polyurethane foam or cellular layers containing active carbon. Wall 12 may be spun-moulded resin 14 in a metal shell 16, and wall 24 may be resin. Cover 34 is removable for changing the filter element. <IMAGE>
Description
Fluid Filter
This invention relates to fluid filters, and is especially concerned with air-filtering elements comprising a part adapted to be fitted onto a cylindrical or tubular spigot in a casing or duct.
The aim of the invention is to provide a filtering element with an effective annular sealing member which fits over the spigot so as to provide a fluid-tight seal between the filtering element and the part of the casing supporting the spigot.
With this aim in view, the invention is directed to a fluid filtering element comprising a tubular outer wall having a filtering medium extending completely across the cross-section so that no fluid can pass through the element without passing through the filtering medium, the tubular wall being provided at or near one of its ends with an inwardly-directed annular end wall provided on its inner periphery with an annular sealing member of soft flexible sealing material such as neoprene, the outer peripheral portion of the sealing member being received and held by bonding in an annular slot in the said inner periphery of the end wall and having an inner peripheral portion projecting radially inwards therefrom, the sealing member as a whole being in the form of a thin annular disc with its inner projecting portion being easily flexible out of its radial disposition when the end wall is pushed over a spigot in a casing adapted to contain the filtering element.
An example of a fluid filtering element in accordance with the invention is shown in the accompanying drawing which illustrates the element in a filter casing as seen in cross-section.
The drawing shows an air-filtering element 10 having a cylindrical wall 12 composed of a spun-moulded inner lining 14 of a mouldable material such as epoxy resin, polyester resin, polyurethane resin and/or a hightemperature resistant sealant and an outer shell 16 of metal such as stainless steel, galvanised steel or other suitable metal. However, the metal outer shell 16 may not be necessary in all instances. In other words, the element could be moulded entirely of one of the nonmetallic materials mentioned above. Extending across the entire inner cross-section of the cylindrical wall 12 is an air-filtering medium 18 which here takes the form of pleated air-filtering paper. It is to be understood, however, that some other air filtering medium can be used instead, such as a plurality of cellular layers with the cells thereof containing granules or other particles of activated carbon.Or, one or more layers of foamed synthetic plastics material such as polyurethane foam can be used as a filtering medium.
The lower end 20 of the filtering medium 18 stops short of the lower end of the cylindrical wall 12 so that a space 22 is formed within the cylindrical wall. This space 22 is partially bounded at its lower end by an annular end wall 24 which is secured to the lower end of the cylindrical wall 12. The end wall 24 extends radially inwards from its connection with the cylindrical wall 12 and is preferably made of a mouldable material such as epoxy resin so that it can be sealed onto the cylindrical wall 12.
The inner periphery 26 of the end wall is provided with an annular slot 28 which receives the outer peripheral portion of a thin disc-like annular sealing member 30 which is firmly secured in the slot 28 by bonding. This means that, when the filtering element 10 is inserted into the filter casing 32 after the top cover 34 of the latter has been removed, the sealing member 30 can make fluid-tight sealing engagement with the outer surface of a tubular spigot 34 after the end wall 24 has been pushed over the spigot. As will be seen, the spigot 34 is supported on an annular wall 36 in the filter casing 32 so that the end wall 24 of the filtering element can rest on the wall 36 of the casing.
Air or other fluid to be filtered by the illustrated filtering element 10 enters the filter casing 32 through an inlet 38 formed in one portion of the cylindrical wall of the casing 32 and then passes downwardly through the filtering medium 18, through the spigot 34, and out of the casing 32 through an outlet 40 which is likewise formed in the cylindrical wall of the casing 32.
Claims (8)
1. A fluid filtering element comprising a tubular outer wall having a filtering medium extending completely across its cross-section so that no fluid can pass through the element without passing through the filtering medium, the tubular wall being provided at or near one of its ends with an inwardly-directed annular end wall which is provided on its inner periphery with an annular sealing member of soft flexible sealing material such as neoprene, the outer peripheral portion of the sealing member being received and held by bonding in an annular slot in the said inner periphery of the end wall and having an inner peripheral portion projecting radially inwards therefrom, the sealing member as a whole being in the form of a thin annular disc with its inner projecting portion being easily flexible out of its radial disposition when the end wall is pushed over a spigot in a casing adapted to contain the filtering element.
2. A fluid filtering element according to claim 1, in which the tubular outer wall is composed of a spun-moulded inner lining of a mouldable material such as epoxy resin, polyester resin, polyurethane resin and/or a hightemperature resistant sealant, and an outer shell of metal such as stainless steel or galvanised steel.
3. A fluid filtering element according to claim 1 or claim 2, in which the filtering medium comprises pleated air-filtering paper, or a plurality of cellular layers with the cells thereof containing granules or other particles of activated carbon, or one or more layers of foamed synthetic plastics material such as polyurethane foam.
4. A fluid filtering element according to any one of claims 1-3, in which that end of the filtering medium nearer the annular end wall stops short of the respective end of the tubular outer wall so that a space is formed within the tubular outer wall.
5. A fluid filtering element according to any preceding claim, in which the annular end wall extends radially inwards from its connection with the tubular outer wall and is made of a mouldable material such as an epoxy resin so as to be sealed onto the tubular outer wall.
6. A fluid filtering element according to claim 1 substantially as described herein with reference to the accompanying drawing.
7. A fluid filter provided with a fluid filtering element as claimed in any preceding claim, in which the filtering element is located within a casing of the filter after a cover of the latter has been removed, the sealing member of the filtering element being in fluid-tight sealing engagement with the outer surface of a tubular spigot supported on an annular wall in the filter casing so that the annular end wall of the filtering element rests on the annular wall of the casing.
8. A fluid filter according to claim 7, substantially as described herein with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8827971A GB2227430B (en) | 1988-11-30 | 1988-11-30 | Fluid filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8827971A GB2227430B (en) | 1988-11-30 | 1988-11-30 | Fluid filter |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8827971D0 GB8827971D0 (en) | 1989-01-05 |
| GB2227430A true GB2227430A (en) | 1990-08-01 |
| GB2227430B GB2227430B (en) | 1992-08-12 |
Family
ID=10647727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8827971A Expired - Lifetime GB2227430B (en) | 1988-11-30 | 1988-11-30 | Fluid filter |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2227430B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252922A (en) * | 1991-02-19 | 1992-08-26 | Toyo Roki Seizo Kk | Pleated filter elements |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2150461A (en) * | 1983-12-01 | 1985-07-03 | Marshall D A G | Air filter |
| GB2163368A (en) * | 1984-08-20 | 1986-02-26 | Marshall D A G | Filter Element |
-
1988
- 1988-11-30 GB GB8827971A patent/GB2227430B/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2150461A (en) * | 1983-12-01 | 1985-07-03 | Marshall D A G | Air filter |
| GB2163368A (en) * | 1984-08-20 | 1986-02-26 | Marshall D A G | Filter Element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252922A (en) * | 1991-02-19 | 1992-08-26 | Toyo Roki Seizo Kk | Pleated filter elements |
| GB2252922B (en) * | 1991-02-19 | 1995-06-07 | Toyo Roki Seizo Kk | Filter element |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2227430B (en) | 1992-08-12 |
| GB8827971D0 (en) | 1989-01-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20081129 |