GB2061122A - Fluid strainer or filter - Google Patents
Fluid strainer or filter Download PDFInfo
- Publication number
- GB2061122A GB2061122A GB7936658A GB7936658A GB2061122A GB 2061122 A GB2061122 A GB 2061122A GB 7936658 A GB7936658 A GB 7936658A GB 7936658 A GB7936658 A GB 7936658A GB 2061122 A GB2061122 A GB 2061122A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- strainer
- filter
- filter element
- closure member
- 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
- 239000012530 fluid Substances 0.000 title claims description 7
- 230000000717 retained effect Effects 0.000 description 2
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering 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
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/153—Anti-leakage or anti-return valves
Description
1 GB 2 061 122 A 1
SPECIFICATION
Fluid strainer or filter This invention relates to a fluid strainer or filter.
The term strainer will be used hereinafter but is intended to encompass a filter or a strainer.
Filters are known which consist of a casing with an 70 inlet and outlet forfluid and a filter member inserted into the casing against spring bias.
It is also known to have such filters in which, when the filter is removed the inlet and outlet port can be closed.
An object of this invention is to provide a simp lified construction of filter which automatically oper ates to ensure that shutters move to close the inlet and outlet ports on removal of the filter element.
According to the present invention a strainer or filter comprises a strainer or filter element remov ably located in a casing, inlet and outlet apertures in the wall of the casing, a first spring biased shutter adapted to open and close the inlet aperture to the casing, a second spring biased shutter adapted to open and close the outlet aperture of the casing, the 85 two shutters being separate and both being held open against spring bias by the strainer orfilter ele ment when in its normal operative position in the casing, but automatically moving to their closed pos itions on removal of the element whereby flow of 90 fluid through the casing is prevented during removal of the filter element.
The filter element is preferably supported within the casing by a ring at each end which can be removed with the filter element. Preferably the ring 95 at the outer end of the casing is adapted to abut a closure member for the casing so that when the closure member is screwed into its fully closed posi tion it moves the filter element together with its upper and lower rings down against spring bias 100 thereby opening both shutters simultaneously.
Preferably the closure member is in the form of a cap with a quick start thread which engages a cor responding thread on the upper ring supporting the filter element. 105 The closure member may be held in position by a bolt or screw and may include removable locking means to prevent inadventent removal of the closure member.
The casing preferably includes stop members to 110 prevent the shutters from moving beyond a pre determined distance when the filter element is removed from the casing.
In the accompanying drawing, Fig. 1 is a vertical section through a strainer or filter embodying the present invention; and Fig. 2 is a plan view of the same strainer.
The strainer shown in Fig. 1 is of the type shown as an oil suction strainer which is adapted to be immersed in the oil or other liquid to be strainer and to suck the oil through the inlet aperture in the cas ing, through the filter element, and out through the outlet aperture.
The strainer comprises a casing 10 which has inlet apertures 11 and outlet apertures 12. Clearly there could be a row of such apertures all round the 65 exterior of the casing.
Within the.casing is a filter element 13 supported at one end by a ring 15 and atthe other end by an elongated ring structure 16.
A shutter 17 of annular form is provided to open and close the apertures 11 and is biased towards the closing position by a spring 18. As shown in Fig. 1, the shutter is in the open position leaving the apertures 11 clear. Movement of the shutter 17 is limited by a ring 19 let into groove 20 in the wall of the 75 casing 10.
There is a second shutter 21 which is biased by spring 22 towards its closing position in which it closes the ring of apertures 12. The spring 22 is retained in position by a ring 23 let into the wall of 80 the casing 10.
The filter 13 is retained in the position shown by an end closure cap 24 which is screwed into a mounting flange 25 welded to the top end of the casing 10.
The closure member 24 is attached to the mounting flange 25 by a quick start thread 26 and is sealed against egress of fluid by sealing rings 27 and 28, The closure member 24 is held in place by a hexagon headed bolt 29 and the mounting flange 25 is attached to fixed structure 32 by a row of bolts 30. The closure member 24 had a handle 31 to enable it to be removed from the filter casing.
When the filter 13 is to be removed for cleaning or replacement the bolt 29 is undone and the closure member 24 lifted out by means of handle 31 so that the filtertogether with the members 16 and 17 can be withdrawn. This withdrawal allows the springs 18 and 22 to move shutters 17 and 21 to positions where they close respective inlet and outlet apertures 11 and 12. Thus as the closure member 24 is removed and the filter element withdrawn the shut ters automatically close off the inlet and outlet to the casing.
Claims (4)
1. A strainer or filter comprises a strainer or filter element removably located in a casing, inlet and outlet apertures in the wall of the casing, a first spring biased shutter adapted to open and close the inlet aperture to the casing, a second spring biased shutted adapted to open and close the outlet aperture of the casing, the two shutters being separate and both being held open against spring bias by the strainer or filter element when in its normal operative position in the casing, but automatically moving to their closed positions on removal of the element whereby flow of fluid through the casing is prevented during removal of the filter element.
2. A strainer or filter according to claim 1 and in which the filter element is supported within the casing by a ring at each end which can be removed with the filter element.
The drawings originally filed were informal and the print here reproduced is taken from a laterfiled formal copy.
2 GB 2 061 122 A 2 3. A strainer or filter according to claim 1 or claim 2 and in which the ring atthe outer end of the casing is adapted to abut a closure memberforthe casing so that when the closure member is screwed into its fully closed position it moves the filter element together with its upper and lower rings down against spring bias thereby opening both shutters simultaneously.
4. A strainer or filter according to any preceding claim and in which the closure member is in the form of a cap with a quick start thread which engages a corresponding thread on the upper ring supporting the filter element.
5. A strainer or filter according to any preceding claim and in which there are two separate springs providing spring bias forthe respective shutters.
6. A suction strainer substantially as hereinbefore particularly described and as illustrated in the accompanying drawing.
Superseded claims 1 to 4 New or amended claims:- 1. A strainer or filter comprising a strainer or filter element removably located in a casing, inlet and outlet apertures in the wall of the casing, a first spring-biased shutter adapted to open and close the inlet aperture to the casing, a second spring-biased shutter adapted to open and close the outlet aperture of the casing, the two shutters being separate and both being held open against spring bias by the strainer or filter element when in its normal operative position in the casing, but automatically moving to their closed positions on removal of the element whereby flow of fluid through the casing is prevented during removal of the filter element.
2. A strainer or filter according to claim land in which the filter element is supported within the casing by a ring at each end of the filter element which can be removed with the filter element.
3. A strainer or filter according to claim 2 and in which one of the rings is adapted to abut a closure member forthe casing so that when the closure member is screwed into its fully closed position the closure member moves the filter element together with its rings against spring-bias thereby opening both shutters simultaneously. _
4. A strainer or filter according to claim 3 and in which the closure member is in the form of a cap with a quick start thread which engages a corresponding thread on one of the rings supporting the filterelement.
Printed for Her Majesty's Stationery Office by The Tweeddale Press Ltd., Berwick-upon-Tweed, 1981. Published atthe Patent Office,25 Southampton Buildings, London,WC2A lAY, from which copies may be obtained.
p 2
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7936658A GB2061122B (en) | 1979-10-23 | 1979-10-23 | Fluid strainer or filter |
| EP19800303600 EP0031195A1 (en) | 1979-10-23 | 1980-10-13 | Fluid strainer or filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7936658A GB2061122B (en) | 1979-10-23 | 1979-10-23 | Fluid strainer or filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2061122A true GB2061122A (en) | 1981-05-13 |
| GB2061122B GB2061122B (en) | 1983-08-24 |
Family
ID=10508703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7936658A Expired GB2061122B (en) | 1979-10-23 | 1979-10-23 | Fluid strainer or filter |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0031195A1 (en) |
| GB (1) | GB2061122B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD492753S1 (en) | 2003-04-25 | 2004-07-06 | Procter & Gamble | Fluidic cartridge end piece |
| USD494654S1 (en) | 2003-04-25 | 2004-08-17 | Procter & Gamble Co. | Fluidic cartridge fittings |
| US10525387B2 (en) | 2017-04-06 | 2020-01-07 | Whirlpool Corporation | Filter cartridge |
| US10584040B2 (en) | 2017-10-06 | 2020-03-10 | Whirlpool Corporation | Filter cartridge |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6639016B2 (en) | 2000-12-31 | 2003-10-28 | Basf Corporation | Method of making a graft polymer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3926806A (en) * | 1974-06-10 | 1975-12-16 | Schroeder Brothers | No-bypass filter system |
-
1979
- 1979-10-23 GB GB7936658A patent/GB2061122B/en not_active Expired
-
1980
- 1980-10-13 EP EP19800303600 patent/EP0031195A1/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD492753S1 (en) | 2003-04-25 | 2004-07-06 | Procter & Gamble | Fluidic cartridge end piece |
| USD494654S1 (en) | 2003-04-25 | 2004-08-17 | Procter & Gamble Co. | Fluidic cartridge fittings |
| US10525387B2 (en) | 2017-04-06 | 2020-01-07 | Whirlpool Corporation | Filter cartridge |
| US10967313B2 (en) | 2017-04-06 | 2021-04-06 | Whirlpool Corporation | Filter cartridge |
| US10584040B2 (en) | 2017-10-06 | 2020-03-10 | Whirlpool Corporation | Filter cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0031195A1 (en) | 1981-07-01 |
| GB2061122B (en) | 1983-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941023 |