WO1989001360A1 - Mechanism for removing solid particles from a liquid-circulating system - Google Patents

Mechanism for removing solid particles from a liquid-circulating system Download PDF

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Publication number
WO1989001360A1
WO1989001360A1 PCT/AU1988/000299 AU8800299W WO8901360A1 WO 1989001360 A1 WO1989001360 A1 WO 1989001360A1 AU 8800299 W AU8800299 W AU 8800299W WO 8901360 A1 WO8901360 A1 WO 8901360A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtering device
depositary
valve
solid particles
valve means
Prior art date
Application number
PCT/AU1988/000299
Other languages
French (fr)
Inventor
Greg Warner
Original Assignee
Warner, Bernice, Helen
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 Warner, Bernice, Helen filed Critical Warner, Bernice, Helen
Publication of WO1989001360A1 publication Critical patent/WO1989001360A1/en

Links

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
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/904—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding directing the mixture to be filtered on the filtering element in a manner to clean the filter continuously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes

Definitions

  • the invention relates to the removal of solid particles from fluids circulation systems. More particularly the invention provides a filtering device to allow removal of solid particles from a flow of fluids without deleterious disruption to the flow of fluids.
  • the radiator usually consists of a number of fine tubes and cool air is forced about the engine by either use of fans or by the movement of the engine relative to air.
  • these tubes are usually of a narrow eliptical design and consequently any solid particles in the water may singularly or cumulatively cause a restriction or blockage of many of these Q tubes. This reduces the cooling efficiency of the radiator and gives rise to overheating of the engine.
  • US Patent Nos. 3372807 and 3834539 propose a filter unit for installation in the cooling system of an engine 0in an automotive vehicle consisting in essence of a chamber through which the water passes.
  • a screen inclined or obliquely orientated is placed in close proximity to a sump allowing solid particles prevented from passing through the screen to gravitate towards the sump.
  • the sump is provided with a
  • a filter unit which consists of a bag-like filter deposed within the coolant circuit so that the coolant passes through the filter and any solid lOparticles are collected by the bag-like material. This suffers from the same disadvantages as those previously discussed as it requires that the flow of fluid through the coolant circuit be interrupted in order to empty the bag. The system may also interfere with the circulation rate of the coolant if deposits
  • the present invention provides a filtering device for removing solid particles from a fluids stream comprising a hollow body having an inlet and an outlet for the fluids stream and a depositary to receive at least a portion of the solid particles, a. filter means disposed in the hollow body adjacent to the depositary to inhibit solid particles entrained in the fluids material passing there through, and a valve means disposed in an aperture in the depository and movable between a first position in sealing engagement with the depositary, and a second position in which the valve is spaced from the depositary.
  • This filtering device enables particles to be periodically removed from the fluids stream by operation of the valve means. The solid particles flow through the aperture and only small amounts of fluids stream are lost.
  • the filtering device includes means to bias the valve means into the required sealing engagement with the depository. This ensures that when not in use the valve does not inadvertently allow fluids to escape by leaking through the aperture.
  • these means are resilient and the use of a spring is the most readily available and preferred.
  • the filtering device includes actuation means communicating with the valve
  • ⁇ ' " ! — means to move the valve means between the first position and second the position.
  • This actuation means is typically an arm which is connected to the valve means and allows the arm to be moved externally of the 5 depository and consequently cause the movement of the valve between the positions mentioned.
  • This arrangement is particularly useful if a sliding gate valve means is employed which involves the side ways movement of the sealing portions of the valve relative to the aperture.
  • the actuation means may be a lever pivotally connected to the filtering device and which lever by pivotal movement causes the movement of the valve means between the first and second positions.
  • the filtering device may be used in --close proximity to an engine and thus heated surfaces, and it is therefore preferred for safety reasons, to have means to remotely actuate the valve means movement.
  • this may be a pull wire, ring pull or pull rod which ensures the operator does not have his hands in close proximity to heated surfaces or 20the portion of the hot fluids stream which is exhausted from the filtering device upon movement of the valve means.
  • the depositary is a distinctly separable member and not merely an area in the hollow body itself.
  • the depository may be 5threadingly engaged to the.hollow body.
  • the valve means should be located in the lowest portion of the depository as the solid material will accumulate there.
  • the filter means is a screen mesh extending substantially entirely across the fluids stream and inclined in a direction opposite to the direction of the fluids stream. This arrangement has two distinct advantages.
  • the first is the presentation to the oncoming fluids stream of a larger area of impact than the cross-sectional area of the hollow body.
  • the fluids stream encounters the screen it is slowed down which would normally cause some back pressure at the screen surface and a low pressure area immediately adjacent to the downstream side of the screen. If the screen becomes partly blocked, this pressure differential increases and can damage the filtering device. Consequently by angling the screen so that the liquid has a larger area of impact with the screen, this pressure differential may be minimized.
  • the second, advantage is the migration of the solid particles downwardly under gravity towards the depository to thereby enhance the effectiveness of solid particle removal from the fluids stream.
  • the filtering device may be made of any suitable material and will depend upon the function and environment in which it is to be used. For example when applying the filtering device to engines, it is important to appreciate that the considerable ho working environment will make certain materials unsuitable. DESCRIPTION OF THE DRAWINGS
  • Fig. 1 is a cross-sectional assembly drawing of a filtering device according to the invention.
  • Fig. 2 is a side view of an assembled filtering device according to Fig. 1.
  • Fig. 3 is a cross sectional assembly drawing of an alternate form of a filtering device according to the invention.
  • a filtering device 1 is shown in Figures 1 and 2 which comprises a hollow body 2 of generally cylindrical shape.
  • a screen mesh 3 is disposed in the hollow body 2 and engages rim 4 to prevent screen mesh 3 moving in the left-hand direction.
  • a holding sleeve 5 is inserted in the hollow body 2 and sandwiches screen mesh 3 into place against the hollow body 2.
  • Both ends of the hollow body 2 have recesses 6 to receive closure members 7 and 8.
  • a neck 9 with barb 10 is provided on closure members 7 and 8.
  • the necks 9 will be of a diameter suitable for connection with a hose (not shown) .
  • the barbs 10 help to securely fit the hose.
  • Hollow member 2 is also provided with a well 11 which is positioned near the screen mesh 3 on the upstream side. The lower end of well 11 is threaded to connect to valve assembly 12. Accordingly, a fluids stream with solid particles
  • Valve assembly 12 includes a threaded inner surface 13 which engages the threaded lower end of well 11.
  • a chamber 14 has an 0 aperture or opening 15 in which a valve 16 is situated.
  • Va-Lve 16 and the aperture 15 have seating surfaces enabling the valve 16 and aperture 15 to sealingly engage thereby preventing the fluids stream from escaping.
  • valve 16 extends exteriorly and engages a 5 surface on pivot arm 18.
  • Pivot arm 18 is pivoted about point 19 which moves lower end 17 and thus valve 16 upward.
  • a biasing spring 21 is positioned about lower end 17 between the pivot arm 18 and the housing 22 of valve assembly 12. Flushed solid particles travel via channel 20 to tube (not shown) or are exhausted directly to the surrounding area.
  • a wire 23 at one of its ends is attached to pivot arm 18 and runs through a stop 24 and is attached to a ring 25.
  • valve 16 When ring 25 is pulled upwardly one end of pivot arm 18 is lifted against biasing spring 21 thereby causing valve 16 to lift.
  • Valve assembly 26 is still provided with an internally threaded surface 13 and chamber 14. However at the base of the threaded surface 13 a retaining member 27 is situated which is held into position when the valve assembly 26 is screwed onto the well 11.
  • a valve 28 is situated in an aperture 29 of chamber 14 for sealing engagement therewith.
  • Valve 28 has a shaft 30 located in an opening 31 of an actuation rod 32 which actuation rod extends outside the valve assembly 26.
  • One end of actuation rod 32 has a retaining pin 33 and a flange 34 at its other end.
  • a biasing spring 35 is interposed between the flange 34 and housing 36.
  • valve 28 is caused to move in the same direction unseating it from aperture 29. Because of the angled underface 37 of valve 28, this sideway movement causes the valve 28 to rise thereby increasing the opening through which solid particles may pass to channel 20. The ensure valve 28 resumes a proper sealing relationship with aperture 29, a biasing spring 30 is interposed between valve 28 and retaining member 27. This biasing
  • the flushed solid particles can be channelled to any convenient location.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A filtering device for removing solid particles from a fluids stream (1) comprising a hollow body having an inlet and an outlet for the fluid stream and (2) a depositary to receive at least a portion of the solid particles, (3) filter means disposed in the hollow body adjacent to the depositary to inhibit the solid particles entrained in the fluids stream passing therethrough and (4) valve means disposed in an aperture in the depositary and movable between a first position in sealing engagement with the depositary and a second position in which the valve is spaced from the depositary.

Description

MECHANISM FOR REMOVING SOLID PARTICLES FROM A LIQUID-CIRCULATING
SYSTEM
FIELD OF THE INVENTION
The invention relates to the removal of solid particles from fluids circulation systems. More particularly the invention provides a filtering device to allow removal of solid particles from a flow of fluids without deleterious disruption to the flow of fluids.
Whilst the invention is explained with reference to the application of a device in treating the fluids flowing in water cooling systems of engines (eg. internal combination engines), it is not so limited. It will be readily apparent to those skilled that the device is applicable to any fluids flow in which the presence of solid particles can have a deleterious effect eg. bore water.
DESCRIPTION OF THE PRIOR ART
In engines it is usual to achieve temperature control of the engine block by circulating water within the block in heat exchange with the engine and passing the warmed water into a radiator for forced air cooling. Over considerable periods of time or shorter times if the engine is in a dusty environment, solid particles may enter the circulation system. Further, the materials from which engines and radiators are fabricated permit the formation of deposits such as rust particles, alloy scale and mineral deposits which may be dislodged and enter the circulating water.
The radiator usually consists of a number of fine tubes and cool air is forced about the engine by either use of fans or by the movement of the engine relative to air. As maximum heat exchange is desirable to efficiently cool the water in the tubes, these tubes are usually of a narrow eliptical design and consequently any solid particles in the water may singularly or cumulatively cause a restriction or blockage of many of these Q tubes. This reduces the cooling efficiency of the radiator and gives rise to overheating of the engine.
In an effort to reduce this, a number of devices have been proposed to permit periodic removal of some or all of the water and to permit the flushing of the radiator. An alternate 5 approach has been to insert a screening device into the water flow entering the radiator, with an associated sump into which separated solid particles may collect.
In particular, US Patent Nos. 3372807 and 3834539 propose a filter unit for installation in the cooling system of an engine 0in an automotive vehicle consisting in essence of a chamber through which the water passes. A screen inclined or obliquely orientated is placed in close proximity to a sump allowing solid particles prevented from passing through the screen to gravitate towards the sump. In each instance the sump is provided with a
25sump plug and it is necessary to remove this plug by unscrewing it and removal from the sump. As this is a dangerous exercise at normal engine temperatures, the engine has to be cooled. Further, if the sump plug is removed whilst water is still circulating, the water would be pumped out of the system via the sump plug hole.
5 Another approach to ensuring that unwanted solid particles do not enter the coolant system is disclosed in Australian Patent Application No. 58700/86. A filter unit is provided which consists of a bag-like filter deposed within the coolant circuit so that the coolant passes through the filter and any solid lOparticles are collected by the bag-like material. This suffers from the same disadvantages as those previously discussed as it requires that the flow of fluid through the coolant circuit be interrupted in order to empty the bag. The system may also interfere with the circulation rate of the coolant if deposits
15build up restricting the flow of coolant through the coolant system.
Accordingly, it is an object of the invention to provide a new filtering device for removing solid particles from fluids that is simple in operation, easy to install, and inexpensive to 20manufacture. It is a further object of the invention to provide a filtering device which permits solid particles to be removed easily from the fluids even whilst fluid is flowing at operating temperatures and pressures. DESCRIPTION OF THE INVENTION
The present invention provides a filtering device for removing solid particles from a fluids stream comprising a hollow body having an inlet and an outlet for the fluids stream and a depositary to receive at least a portion of the solid particles, a. filter means disposed in the hollow body adjacent to the depositary to inhibit solid particles entrained in the fluids material passing there through, and a valve means disposed in an aperture in the depository and movable between a first position in sealing engagement with the depositary, and a second position in which the valve is spaced from the depositary.
This filtering device enables particles to be periodically removed from the fluids stream by operation of the valve means. The solid particles flow through the aperture and only small amounts of fluids stream are lost.
In a first preferred embodiment of the invention, the filtering device includes means to bias the valve means into the required sealing engagement with the depository. This ensures that when not in use the valve does not inadvertently allow fluids to escape by leaking through the aperture. Typically these means are resilient and the use of a spring is the most readily available and preferred.
In another preferred embodiment of the invention, the filtering device includes actuation means communicating with the valve
~'"! — means to move the valve means between the first position and second the position.
This actuation means is typically an arm which is connected to the valve means and allows the arm to be moved externally of the 5 depository and consequently cause the movement of the valve between the positions mentioned. This arrangement is particularly useful if a sliding gate valve means is employed which involves the side ways movement of the sealing portions of the valve relative to the aperture.
L0Alternatively, the actuation means may be a lever pivotally connected to the filtering device and which lever by pivotal movement causes the movement of the valve means between the first and second positions.
Tt will be appreciated that the filtering device may be used in --close proximity to an engine and thus heated surfaces, and it is therefore preferred for safety reasons, to have means to remotely actuate the valve means movement. Typically this may be a pull wire, ring pull or pull rod which ensures the operator does not have his hands in close proximity to heated surfaces or 20the portion of the hot fluids stream which is exhausted from the filtering device upon movement of the valve means.
In a further preferred embodiment, the depositary is a distinctly separable member and not merely an area in the hollow body itself. In this arrangement the depository may be 5threadingly engaged to the.hollow body. For convenience the valve means should be located in the lowest portion of the depository as the solid material will accumulate there.
In another preferred embodiment, the filter means is a screen mesh extending substantially entirely across the fluids stream and inclined in a direction opposite to the direction of the fluids stream. This arrangement has two distinct advantages.
The first is the presentation to the oncoming fluids stream of a larger area of impact than the cross-sectional area of the hollow body. As the fluids stream encounters the screen it is slowed down which would normally cause some back pressure at the screen surface and a low pressure area immediately adjacent to the downstream side of the screen. If the screen becomes partly blocked, this pressure differential increases and can damage the filtering device. Consequently by angling the screen so that the liquid has a larger area of impact with the screen, this pressure differential may be minimized.
The second, advantage is the migration of the solid particles downwardly under gravity towards the depository to thereby enhance the effectiveness of solid particle removal from the fluids stream.
The filtering device may be made of any suitable material and will depend upon the function and environment in which it is to be used. For example when applying the filtering device to engines, it is important to appreciate that the considerable ho working environment will make certain materials unsuitable. DESCRIPTION OF THE DRAWINGS
The invention will now be illustrated by reference to the accompanying drawings in which:
Fig. 1 is a cross-sectional assembly drawing of a filtering device according to the invention.
Fig. 2 is a side view of an assembled filtering device according to Fig. 1.
Fig. 3 is a cross sectional assembly drawing of an alternate form of a filtering device according to the invention.
A filtering device 1 is shown in Figures 1 and 2 which comprises a hollow body 2 of generally cylindrical shape. A screen mesh 3 is disposed in the hollow body 2 and engages rim 4 to prevent screen mesh 3 moving in the left-hand direction. A holding sleeve 5 is inserted in the hollow body 2 and sandwiches screen mesh 3 into place against the hollow body 2.
Both ends of the hollow body 2 have recesses 6 to receive closure members 7 and 8. A neck 9 with barb 10 is provided on closure members 7 and 8. The necks 9 will be of a diameter suitable for connection with a hose (not shown) . The barbs 10 help to securely fit the hose. Hollow member 2 is also provided with a well 11 which is positioned near the screen mesh 3 on the upstream side. The lower end of well 11 is threaded to connect to valve assembly 12. Accordingly, a fluids stream with solid particles
5 encounters screen mesh 3 and some of the solid particles are prevented from passing through screen mesh 3. Such solid particles gravitate into well 11 and valve assembly 12.
Valve assembly 12 includes a threaded inner surface 13 which engages the threaded lower end of well 11. A chamber 14 has an 0 aperture or opening 15 in which a valve 16 is situated.
Va-Lve 16 and the aperture 15 have seating surfaces enabling the valve 16 and aperture 15 to sealingly engage thereby preventing the fluids stream from escaping.
The lower end 17 of valve 16 extends exteriorly and engages a 5 surface on pivot arm 18. Pivot arm 18 is pivoted about point 19 which moves lower end 17 and thus valve 16 upward.
This upward movement forces the seats of the valve 16 and aperture 15 apart and solids particles in chamber 14 and well 11 are flushed into channel 20. To ensure valve 16 reseals with Z.0 aperture 15, a biasing spring 21 is positioned about lower end 17 between the pivot arm 18 and the housing 22 of valve assembly 12. Flushed solid particles travel via channel 20 to tube (not shown) or are exhausted directly to the surrounding area. To enable pivot arm 18 to more conveniently actuate the valve assembly 12 a wire 23 at one of its ends is attached to pivot arm 18 and runs through a stop 24 and is attached to a ring 25.
When ring 25 is pulled upwardly one end of pivot arm 18 is lifted against biasing spring 21 thereby causing valve 16 to lift.
An alternate illustration of the invention is depicted in Figure 3 in which like items to those in Figures 1 and 2 are given the same reference numerals.
The basic variation of this embodiment from that of Fig. 1 and 2 is in the valve assembly. Valve assembly 26 is still provided with an internally threaded surface 13 and chamber 14. However at the base of the threaded surface 13 a retaining member 27 is situated which is held into position when the valve assembly 26 is screwed onto the well 11. A valve 28 is situated in an aperture 29 of chamber 14 for sealing engagement therewith. Valve 28 has a shaft 30 located in an opening 31 of an actuation rod 32 which actuation rod extends outside the valve assembly 26. One end of actuation rod 32 has a retaining pin 33 and a flange 34 at its other end. A biasing spring 35 is interposed between the flange 34 and housing 36.
To flush solid particles from chamber 14, actuation rod 32 is moved to the left compressing biasing spring 35. Valve 28 is caused to move in the same direction unseating it from aperture 29. Because of the angled underface 37 of valve 28, this sideway movement causes the valve 28 to rise thereby increasing the opening through which solid particles may pass to channel 20. The ensure valve 28 resumes a proper sealing relationship with aperture 29, a biasing spring 30 is interposed between valve 28 and retaining member 27. This biasing
S7 spring 30 compresses as valve 28 rises.
As with the arrangement shown in Figs. 1 and 2 the flushed solid particles can be channelled to any convenient location.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A filtering device for removing solid particles from in fluids stream comprising a hollow body having an inlet and an outlet for the fluids stream and a depositary to receive at least a portion of the solid particles, filte means disposed in the hollow body adjacent to the depositary to inhibit the solids particles entrained in the fluids stream passing there through, and valve means disposed in an aperture in the depositary and moveable between a first position in sealing engagement with the depositary and a second position in which the valve is spaced from the depositary.
2. A filtering device according to claim 1 including means to bias the valve means into the sealing engagement with the depositary.
3. A filtering device according to claim 1 including means to resiliently bias the valve means into the sealing engagement with the depositary.
4. A filtering device according to either claims 1 or 2 wherein the means to bias is a spring.
5. A filtering device according to claim 1 including actuation means communicating with the valve means to move the valve means between the first position and second position.
6. A filtering device according to claim 5 wherein the actuation means includes means to remotely actuate the valve means to move between the first position and second position.
7. A filtering device according to claim 5 wherein the actuation means comprises an arm connected to the valve means.
8. A filtering device according to claim 5 wherein the actuation means comprises a lever pivotally connected to the filtering device and having a surface engagable with the valve means.
9. A filtering device according to claim 1 wherein the depository is detachable from the hollow body.
10. A filtering device according to claim 1 wherein the filter means comprises a screen mesh extending substantially entirely across the fluids stream and inclined in a direction opposite to the direction of the fluids stream.
11. A filtering device substantially as hereinbefore described with reference to the drawings.
PCT/AU1988/000299 1987-08-19 1988-08-11 Mechanism for removing solid particles from a liquid-circulating system WO1989001360A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPI382687 1987-08-19
AUPI3826 1987-08-19

Publications (1)

Publication Number Publication Date
WO1989001360A1 true WO1989001360A1 (en) 1989-02-23

Family

ID=3772395

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1988/000299 WO1989001360A1 (en) 1987-08-19 1988-08-11 Mechanism for removing solid particles from a liquid-circulating system

Country Status (2)

Country Link
WO (1) WO1989001360A1 (en)
ZA (1) ZA886019B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0731723A1 (en) * 1993-12-02 1996-09-18 Virgil Alexandru Comanescu Filter device

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB133497A (en) * 1918-11-04 1919-10-16 Edwin Charles Procter Improvements in or relating to Liquid Filtering Devices.
US1590128A (en) * 1923-05-05 1926-06-22 Earle I Staples Self-cleaning oil strainer
US1630287A (en) * 1924-09-25 1927-05-31 Taylor Instrument Co Filter
US1632960A (en) * 1926-07-20 1927-06-21 Otto E Giese Filter
US1977601A (en) * 1932-06-02 1934-10-16 Fred Huettmann Fluid strainer
US2125532A (en) * 1936-01-22 1938-08-02 Wells Herbert James Clement Continuous flow strainer
AU280366A (en) * 1966-03-11 1972-01-26 Rockwell-Standard Corporation Fluid strainers
US3823831A (en) * 1971-11-19 1974-07-16 H Leblanc Strainer device for liquids
AU5118173A (en) * 1972-01-21 1974-07-18 Siemens Aktiengesellschaft Improvements in or relating to strainers
US3834539A (en) * 1972-12-26 1974-09-10 C Thompson Trap for removing solid particles from a liquid circulating system
AU7190374A (en) * 1973-08-02 1976-02-05 Legras, B.L. a FILTER ESPECIALLY INTENDED FOR FILTERING NATURAL WATER FORTHE IRRIGATION OF CULTIVATED FIELDS
AU7971975A (en) * 1974-03-29 1976-10-07 Goldie Ronald Filter
US4051042A (en) * 1975-12-15 1977-09-27 Tullier Leo D Fluid flow filtering arrangement
AU1388576A (en) * 1975-12-31 1977-11-17 American Defibrator Inc. Discharge device for fibrous material
US4207181A (en) * 1977-02-11 1980-06-10 Mordeki Drori Self-cleaning filters
AU2521884A (en) * 1983-03-05 1984-09-06 Joh. A. Benckiser Wassertechnik G.m.b.H. Filter cleanout device with reverse flow

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB133497A (en) * 1918-11-04 1919-10-16 Edwin Charles Procter Improvements in or relating to Liquid Filtering Devices.
US1590128A (en) * 1923-05-05 1926-06-22 Earle I Staples Self-cleaning oil strainer
US1630287A (en) * 1924-09-25 1927-05-31 Taylor Instrument Co Filter
US1632960A (en) * 1926-07-20 1927-06-21 Otto E Giese Filter
US1977601A (en) * 1932-06-02 1934-10-16 Fred Huettmann Fluid strainer
US2125532A (en) * 1936-01-22 1938-08-02 Wells Herbert James Clement Continuous flow strainer
AU280366A (en) * 1966-03-11 1972-01-26 Rockwell-Standard Corporation Fluid strainers
US3823831A (en) * 1971-11-19 1974-07-16 H Leblanc Strainer device for liquids
AU5118173A (en) * 1972-01-21 1974-07-18 Siemens Aktiengesellschaft Improvements in or relating to strainers
US3834539A (en) * 1972-12-26 1974-09-10 C Thompson Trap for removing solid particles from a liquid circulating system
AU7190374A (en) * 1973-08-02 1976-02-05 Legras, B.L. a FILTER ESPECIALLY INTENDED FOR FILTERING NATURAL WATER FORTHE IRRIGATION OF CULTIVATED FIELDS
AU7971975A (en) * 1974-03-29 1976-10-07 Goldie Ronald Filter
US4051042A (en) * 1975-12-15 1977-09-27 Tullier Leo D Fluid flow filtering arrangement
AU1388576A (en) * 1975-12-31 1977-11-17 American Defibrator Inc. Discharge device for fibrous material
US4207181A (en) * 1977-02-11 1980-06-10 Mordeki Drori Self-cleaning filters
AU2521884A (en) * 1983-03-05 1984-09-06 Joh. A. Benckiser Wassertechnik G.m.b.H. Filter cleanout device with reverse flow

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0731723A1 (en) * 1993-12-02 1996-09-18 Virgil Alexandru Comanescu Filter device
EP0731723A4 (en) * 1993-12-02 1998-01-07 Virgil Alexandru Comanescu Filter device

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ZA886019B (en) 1989-05-30

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