CA2001500A1 - Filter cartridge for use in a device for filtering liquid in particular drinking water - Google Patents
Filter cartridge for use in a device for filtering liquid in particular drinking waterInfo
- Publication number
- CA2001500A1 CA2001500A1 CA 2001500 CA2001500A CA2001500A1 CA 2001500 A1 CA2001500 A1 CA 2001500A1 CA 2001500 CA2001500 CA 2001500 CA 2001500 A CA2001500 A CA 2001500A CA 2001500 A1 CA2001500 A1 CA 2001500A1
- Authority
- CA
- Canada
- Prior art keywords
- cap
- filter cartridge
- sieve
- filter
- venting
- 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.)
- Abandoned
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 title claims abstract description 6
- 239000003651 drinking water Substances 0.000 title claims abstract description 4
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000013022 venting Methods 0.000 claims description 30
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A filter cartridge (1) for use in a device for filtering liquids, in particular drinking water, comprises a beakerlike container (2) with a removable cap (3) and flow openings (4) and flow openings (9) disposed in the bottom (6) of the container, a granular filter composition (5) introduced into the container (2), and one sieve (7, 8) each disposed between the cap (3) and the filter composition (5), and between the bottom (6) and filter composition (5). The cap is embodied as a cone tapering toward the top (flat cone) and the sieve (7) associated with the cap is embodied corresponding to the cap (3) as a conical sieve, and its encompassing rim is welded to the cap (3). The sieve (3) associated with the bottom is embodied by an intrinsically flat disk and is welded with its encompassing rim to the bottom (6).
A filter cartridge (1) for use in a device for filtering liquids, in particular drinking water, comprises a beakerlike container (2) with a removable cap (3) and flow openings (4) and flow openings (9) disposed in the bottom (6) of the container, a granular filter composition (5) introduced into the container (2), and one sieve (7, 8) each disposed between the cap (3) and the filter composition (5), and between the bottom (6) and filter composition (5). The cap is embodied as a cone tapering toward the top (flat cone) and the sieve (7) associated with the cap is embodied corresponding to the cap (3) as a conical sieve, and its encompassing rim is welded to the cap (3). The sieve (3) associated with the bottom is embodied by an intrinsically flat disk and is welded with its encompassing rim to the bottom (6).
Description
20~L5a~
FILTER CARTRIDGE FOR USE IN A DEVICE FOR FILTERING
LIQUID IN PARTICULAR DRINKING ~YATER
FIELD OF THE INVENTION
The invention relates to a filter cartridge for use in a device for filtering liquids, in particular drinking water, comprising a beakerlike container having a removable lid with flowthrough openings, and flowthrough openings disposed in the bottom of the container, a granular filter composition introduced into the container and ~ith a first sieve disposed between the cap and the filter compositio~ and a second sieve between the bottom and the filter composition.
BACKGROUND OF THE INVENTION ;.
Such a filter cartridge is known for instance from US
Patent 2,630,227 and German Utility Model 7 017 889. There the two sieves rest loosely on or under the filter composition, so that shifting of the sieve from movement of the water and air is not precluded, which makes the retention action of the sieve inadequate in terms of preventing the granular filter composition from escaping.
Another disadvantage in the known filter cartridges is that venting is uncontrolled, so that the flow speed of the water is not controlled but instead proceeds unevenly and in fits and starts, so that the dwell time is varied and the dwell time required for optimal filtering is frequently not achieved.
SUMMARY OF THE INVENTION
It is an object o~ the invention to overcome deficien-cies in the prior art, such as indicated above.
It is another object of the invention to improve the filter cartridge, having the general design of the type described above, to provide a secure positional fixation of the sieve to assure optimal retention action, and simultaneously to enable ;~ . , ' ;'~`' ': : ~' .. ~ - . .
- ~ :. , ., , ~.
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automatic control and stabili~atlon of the flow of the water to be filtered, in combination with venting.
According to this invention these objects are attained by providing a beakerlike container having a removable lid or cap with flowthrough openings, and 10wthrough openings disposed in the bottom of the container, a granular filter composition introduced into the container and one sieve each disposed between the cap and the filter composition and between the bottom and the filter composition, wherein the cap is embodied as a cone tapering toward the top (flat or truncated cone) and the top sieve associated with the cap is embodied as a conical sieve corresponding to the shape of the cap, and its encompassing rim is welded to the cap, and the bottom sieve associated with the bottom is embodied by an intrinsically flat disk and is welded with its encompassing rim to the bottom of the container, and in combination with the venting slits these characteristics result in optimal filtering action.
Advantageous further objects, features and the nature of the invention will be more apparent from the following descrip-tion. The subject of the invention extends not only to the characteristics of the various individual aspects but also to their combination.
The filter cartridge according to the invention has a si~ple and inexpensive design, is easy to handle, and because of the welded connection of the sieves to the cartridge cap and cartridge bottom has very good and reliable retention action to prevent any escape of the granular filter composition resulting from the quantity of air and water flowing through it.
The filter cartridge is also equipped in the vicinity of the cap with venting slits, which effect a controlled venting and flow-through of the water to be filtered, and which because of the ralation of the total of their cross sections determine the flow speed of the water and hence its dwell time for filtration, so that optimal cleaning of the water is assured.
With this filter cartridge, tap water is refined, and organic floating substances and other foreign substances are retained to the largest possible extent.
An exemplary embodiment of the invention will be described in detail below.
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BRIEF DESC~IPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a water ~iltering unit, comprising a collecting vessel holding the ~iltered water, a filter holder mounted removably on it and holding the water to be filtered, the filter holder having a removable cap and a filter cartridge removably retained in the bottom of the filter holder and protruding into the collecting vessel;
Fig. 2 is a longitudinal section through the filter cartridge;
Fig. 3 is an exploded perspective view of the filter cartridge;
Fig. 4 is a side view of the removable cap of the filter cartridge; and Fig. 5 is a cross section through the dome of the cap taken along the line A-A of Fig. 4.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Noting Fig. 2, the filter cartridge 1 for use in a unit or device for filtering liquids, in particular water, comprises a beakerlike container 2 with a removable cap 3 and flow openings 4, a granular filter composition 5 introduced into the container 2, a first or upper sieve 7 disposed between the cap 3 and the filter composition 5, and a second or lower sieve 8 between the container bottom 6 and the filter composition 5; flow openings 9 are also provided in the container bottom 6. The sieve 8 associated with the ~ottom is embodied by an intrinsically flat disk and is welded with its encompassing rim to the bottom 6.
The cap 3 is embodied as a cone tapering toward the top (flat or truncated cone), and the sieve 7 associated with the cap 3 is similarly shaped as a conical sieve and is welded at its encompassing rim to the cap 3. The conical cap 3 has a hollow dome 10 rising from the cap 3 and which is formed onto the tip of the cone; the dome has at least one venting slit 11 formed in the dome jacket or sidewall 10a.
FILTER CARTRIDGE FOR USE IN A DEVICE FOR FILTERING
LIQUID IN PARTICULAR DRINKING ~YATER
FIELD OF THE INVENTION
The invention relates to a filter cartridge for use in a device for filtering liquids, in particular drinking water, comprising a beakerlike container having a removable lid with flowthrough openings, and flowthrough openings disposed in the bottom of the container, a granular filter composition introduced into the container and ~ith a first sieve disposed between the cap and the filter compositio~ and a second sieve between the bottom and the filter composition.
BACKGROUND OF THE INVENTION ;.
Such a filter cartridge is known for instance from US
Patent 2,630,227 and German Utility Model 7 017 889. There the two sieves rest loosely on or under the filter composition, so that shifting of the sieve from movement of the water and air is not precluded, which makes the retention action of the sieve inadequate in terms of preventing the granular filter composition from escaping.
Another disadvantage in the known filter cartridges is that venting is uncontrolled, so that the flow speed of the water is not controlled but instead proceeds unevenly and in fits and starts, so that the dwell time is varied and the dwell time required for optimal filtering is frequently not achieved.
SUMMARY OF THE INVENTION
It is an object o~ the invention to overcome deficien-cies in the prior art, such as indicated above.
It is another object of the invention to improve the filter cartridge, having the general design of the type described above, to provide a secure positional fixation of the sieve to assure optimal retention action, and simultaneously to enable ;~ . , ' ;'~`' ': : ~' .. ~ - . .
- ~ :. , ., , ~.
. , 2~ o~
automatic control and stabili~atlon of the flow of the water to be filtered, in combination with venting.
According to this invention these objects are attained by providing a beakerlike container having a removable lid or cap with flowthrough openings, and 10wthrough openings disposed in the bottom of the container, a granular filter composition introduced into the container and one sieve each disposed between the cap and the filter composition and between the bottom and the filter composition, wherein the cap is embodied as a cone tapering toward the top (flat or truncated cone) and the top sieve associated with the cap is embodied as a conical sieve corresponding to the shape of the cap, and its encompassing rim is welded to the cap, and the bottom sieve associated with the bottom is embodied by an intrinsically flat disk and is welded with its encompassing rim to the bottom of the container, and in combination with the venting slits these characteristics result in optimal filtering action.
Advantageous further objects, features and the nature of the invention will be more apparent from the following descrip-tion. The subject of the invention extends not only to the characteristics of the various individual aspects but also to their combination.
The filter cartridge according to the invention has a si~ple and inexpensive design, is easy to handle, and because of the welded connection of the sieves to the cartridge cap and cartridge bottom has very good and reliable retention action to prevent any escape of the granular filter composition resulting from the quantity of air and water flowing through it.
The filter cartridge is also equipped in the vicinity of the cap with venting slits, which effect a controlled venting and flow-through of the water to be filtered, and which because of the ralation of the total of their cross sections determine the flow speed of the water and hence its dwell time for filtration, so that optimal cleaning of the water is assured.
With this filter cartridge, tap water is refined, and organic floating substances and other foreign substances are retained to the largest possible extent.
An exemplary embodiment of the invention will be described in detail below.
;:
, ,~. : :,. : ' ~, :
~, :. ;. -: ..
. . ~. .
50~
BRIEF DESC~IPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a water ~iltering unit, comprising a collecting vessel holding the ~iltered water, a filter holder mounted removably on it and holding the water to be filtered, the filter holder having a removable cap and a filter cartridge removably retained in the bottom of the filter holder and protruding into the collecting vessel;
Fig. 2 is a longitudinal section through the filter cartridge;
Fig. 3 is an exploded perspective view of the filter cartridge;
Fig. 4 is a side view of the removable cap of the filter cartridge; and Fig. 5 is a cross section through the dome of the cap taken along the line A-A of Fig. 4.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Noting Fig. 2, the filter cartridge 1 for use in a unit or device for filtering liquids, in particular water, comprises a beakerlike container 2 with a removable cap 3 and flow openings 4, a granular filter composition 5 introduced into the container 2, a first or upper sieve 7 disposed between the cap 3 and the filter composition 5, and a second or lower sieve 8 between the container bottom 6 and the filter composition 5; flow openings 9 are also provided in the container bottom 6. The sieve 8 associated with the ~ottom is embodied by an intrinsically flat disk and is welded with its encompassing rim to the bottom 6.
The cap 3 is embodied as a cone tapering toward the top (flat or truncated cone), and the sieve 7 associated with the cap 3 is similarly shaped as a conical sieve and is welded at its encompassing rim to the cap 3. The conical cap 3 has a hollow dome 10 rising from the cap 3 and which is formed onto the tip of the cone; the dome has at least one venting slit 11 formed in the dome jacket or sidewall 10a.
: , son It is pr~ferable for a plurality of venting ~lits 11, for example four, to be recessed from the encompassing dome jac~et lOa and distributed uniformly over the circumference; each venting slit 11 extends over the entire height of the dome, spaced apart from the dome cap lOb and comes to an end inside of the conical cap 3. Each venting slit 11 has a cross section that tapers from the maximum inside outwardly through the wall thickness of the dome jacket lOa; the smallest cross-sectional width of each venting slit 11 is smaller than the particle size of the filter composition 5. Preferably, each venting slit 11 has a slit width X of approximately 0.8 mm on the inside and a slit width Y of approximately 0.3 mm on the outside Each venting slit 11 can have the same cross-sectional size over its entire height, as in Fig. 4, or may be embodied such that it tapers toward the top in cross section, as in Figs. 2 and 3.
The dimensions of the venting slit or slits 11 in terms of their total venting cross section are such that the water running through the filter cartridge 1 has a variable dwell time dictated in accordance with an absorption or reaction time of the filter composition 5, so that essentially the venting speed deter-mines the flow speed of the water through the filter composition 5, and the filter composition 5 itself affects the flow speed of the water. As a result of this kind of flow speed, approximately 95% of the harmful substances are removed from the water.
The sieve 7 associated with the cap has a hole 12 in the tip of the cone, corresponding to the dome 10, and the encom-passing rim 12a of the hole and the encompassing rim 7a of the sieve are joined on the inside to the cap 3 at the weld points 13, 14, or along circular seams. The disklike sieve 8 is joined with its encompassing disk rim 8a to the bottom 6 at one or more weld point 15, or along the circular seam. The two sieves 7, 8 comprise a felted non-woven material, preferably plastic fleece, such as polypropylene or the like.
With an encompassing retaining strip 3a, the cap 3 extends over an outwardly oriented detent edge 2a of the container 2 and is joined reliably and detachably to the container 2 by means of this detent connection. The cap 3 is of plastic, prefer-ably polyethylene or the like. The beakerlike container 2 , , - : ~ . .
.. .. : , : ~..., , ,,. ~',: ,:
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2a~
comprises plastic and can be made of polystyrene for filtering cold water and of stvrene acrylonitrile copolymer for filtering hot water.
The flow openings 4, 9 in the cap 3 and bottom 6 can be embodied by slits.
The filter composition 5 comprises a high-grade ion exchanger resin and special activated charcoal.
The filter unit can be seen in Fig. 1, and has a collecting vessel 16 holding the filtered water and a filter holder 17 removably disposed on the collecting vessel and holding the water to be filtered, and the ~ilter holder 17 also has a removable cap 18. The filter cartridge 1 is removably placed in the bottom of the filter holder 17, preferably in a formed-on necX
19, and the filter cartridge 1 protrudes into the collecting vessel 16.
The water to be filtered is introduced into the filter holder 17 and then runs through the slits 4 in the cap 3 of the filter cartridge 1 through the sieve 7 associated with the cap, through the ~ilter composition 5, through the sieve 8 associated with the bottom, and through the slits 9 in the container bottom 6; on passing through the filter composition 5, the water is cleaned by ion exchange and absorption processes, so that the filtered water is then caught in the collecting vessel 16. In this passage of water, the air located in the collecting vessel 16 is simultaneously positively displaced and flows upward through the filter cartridge 1 and emerges from the venting slits 11; this venting determines the flow speed of the water to be filtered.
The two sieves 7, 8 prevent particles of filter composition 5 from being able to escapè to the ouksid~ through the slits 9 in the bottom 6 or through the slits 4 in the cap 3.
After a certain water throughput, which depends on how hard the water is, the filter composition 5 is exhausted and must be replaced. To this end, the cartridge 1 is removed from the filter unit, its cap 3 is removed, and and the filter composition 5 is poured out and replaced with a new one.
once the cap 3 has been set in place, the cartridge 1 is inserted into the filter unit again and the unit is then ready for operation again.
~- :
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Z~500 The foregoing description of the specific embodiments will so fully reveal the general nature of the invention that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed em~odiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
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The dimensions of the venting slit or slits 11 in terms of their total venting cross section are such that the water running through the filter cartridge 1 has a variable dwell time dictated in accordance with an absorption or reaction time of the filter composition 5, so that essentially the venting speed deter-mines the flow speed of the water through the filter composition 5, and the filter composition 5 itself affects the flow speed of the water. As a result of this kind of flow speed, approximately 95% of the harmful substances are removed from the water.
The sieve 7 associated with the cap has a hole 12 in the tip of the cone, corresponding to the dome 10, and the encom-passing rim 12a of the hole and the encompassing rim 7a of the sieve are joined on the inside to the cap 3 at the weld points 13, 14, or along circular seams. The disklike sieve 8 is joined with its encompassing disk rim 8a to the bottom 6 at one or more weld point 15, or along the circular seam. The two sieves 7, 8 comprise a felted non-woven material, preferably plastic fleece, such as polypropylene or the like.
With an encompassing retaining strip 3a, the cap 3 extends over an outwardly oriented detent edge 2a of the container 2 and is joined reliably and detachably to the container 2 by means of this detent connection. The cap 3 is of plastic, prefer-ably polyethylene or the like. The beakerlike container 2 , , - : ~ . .
.. .. : , : ~..., , ,,. ~',: ,:
~: .. : . ~ .: , . ~ . :
2a~
comprises plastic and can be made of polystyrene for filtering cold water and of stvrene acrylonitrile copolymer for filtering hot water.
The flow openings 4, 9 in the cap 3 and bottom 6 can be embodied by slits.
The filter composition 5 comprises a high-grade ion exchanger resin and special activated charcoal.
The filter unit can be seen in Fig. 1, and has a collecting vessel 16 holding the filtered water and a filter holder 17 removably disposed on the collecting vessel and holding the water to be filtered, and the ~ilter holder 17 also has a removable cap 18. The filter cartridge 1 is removably placed in the bottom of the filter holder 17, preferably in a formed-on necX
19, and the filter cartridge 1 protrudes into the collecting vessel 16.
The water to be filtered is introduced into the filter holder 17 and then runs through the slits 4 in the cap 3 of the filter cartridge 1 through the sieve 7 associated with the cap, through the ~ilter composition 5, through the sieve 8 associated with the bottom, and through the slits 9 in the container bottom 6; on passing through the filter composition 5, the water is cleaned by ion exchange and absorption processes, so that the filtered water is then caught in the collecting vessel 16. In this passage of water, the air located in the collecting vessel 16 is simultaneously positively displaced and flows upward through the filter cartridge 1 and emerges from the venting slits 11; this venting determines the flow speed of the water to be filtered.
The two sieves 7, 8 prevent particles of filter composition 5 from being able to escapè to the ouksid~ through the slits 9 in the bottom 6 or through the slits 4 in the cap 3.
After a certain water throughput, which depends on how hard the water is, the filter composition 5 is exhausted and must be replaced. To this end, the cartridge 1 is removed from the filter unit, its cap 3 is removed, and and the filter composition 5 is poured out and replaced with a new one.
once the cap 3 has been set in place, the cartridge 1 is inserted into the filter unit again and the unit is then ready for operation again.
~- :
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Z~500 The foregoing description of the specific embodiments will so fully reveal the general nature of the invention that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed em~odiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
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Claims (16)
1. A filter cartridge for use in a device for filtering liquids, in particular drinking water, comprising a beakerlike container having a removable cap with flowthrough openings, and flowthrough openings disposed in a bottom of the container, a granular filter composition in the container, a first sieve disposed between the cap and the filter composition and a second sieve disposed between the bottom and the filter composition, wherein the cap (3) comprises a cone tapering toward the top and the first sieve (7) associated with the cap is embodied as a conical sieve corresponding generally to the shape of the cap (3), and its encompassing rim is welded to the cap (3), and the second sieve (8) associated with the bottom is embodied by an intrinsi-cally flat disk and is welded with its encompassing rim to the bottom (6).
2. The filter cartridge of claim 1, wherein the conical cap (3), in its conical tip, has a formed-on hollow dome (10) having a sidewall rising from the cap (3) and having at least one venting slit (11) recessed in the dome sidewall (10a).
3. The filter cartridge of claim 2, wherein the dome (10) has a plurality of said venting slits (11), disposed uniform-ly over the circumference of said sidewall.
4. The filter cartridge of claim 3, wherein each venting slit (11) extends in a spaced-apart manner, beginning at the dome cap (10b), over the entire dome height and comes to an end inside of the cap (3).
5. The filter cartridge of claim 3, wherein each venting slit (11) has a cross section tapering conically from the inside outward in the wall thickness of the sidewall (10a), and the smallest cross-sectional width is smaller than the particle size of the filter composition.
6. The filter cartridge of claim 3, wherein each venting slit (11) has a slit width X on the inside of approximate-ly 0.8 mm and a slit width Y on the outside of approximately 0.3 mm.
7. The filter cartridge of claim 2, wherein each venting slit is dimensioned in its total venting cross section in such a way that the water running through the filter cartridge (1) has a dwell time dictated in accordance with an absorption or reaction time of the filter composition (5), so that the venting speed essentially determines the flow speed of the water through the filter composition (5).
8. The filter cartridge of claim 2, wherein each said venting slit (11) has a cross-sectional width which over its entire vertical length taperes toward the top in its cross-sectional width.
9. The filter cartridge of claim 2, wherein the first sieve (7) associated with the cap has a hole (12) corresponding to the dome (10) in the vicinity of the conical tip, and both the encompassing rim (12a) of the hole and the encompassing rim (7a) of the sieve are joined each by one weld seam (13, 14) to the cap (3).
10. The filter cartridge of claim 2, wherein the second sieve (8) associated with the bottom is joined at its encompassing disk rim (8a) to the bottom (6) by means of a weld seam (15).
11. The filter cartridge of claim 1, wherein said sieves (7, 8) comprise a felted non-woven material, preferably plastic fleece, such as polypropylene.
12. The filter cartridge of claim 1, wherein the cap (3) comprises plastic, preferably polyethylene.
13. The filter cartridge of claim 1, characterized in that the beakerlike container (2) comprises plastic, and for filtering cold water comprises a plastic based on polystyrene and for filtering hot water comprises a plastic based on styrene acrylonitrile copolymer.
14. The filter cartridge of claim 3, wherein each venting slit is dimensioned in its total venting cross section in such a way that the water running through the filter cartridge (1) has a dwell time dictated in accordance with an absorption or reaction time of the filter composition (5), so that the venting speed essentially determines the flow speed of the water through the filter composition (5).
15. The filter cartridge of claim 14, wherein each said venting slit (11) has a cross-sectional width which over its entire vertical length taperes toward the top in its cross-sectional width.
16. The filter cartridge of claim 15, wherein the first sieve (7) associated with the cap has a hole (12) corresponding to the dome (10) in the vicinity of the conical tip, and both the encompassing rim (12a) of the hole and the encompassing rim (7a) of the sieve are joined each by one weld seam (13, 14) to the cap (3).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8813571U DE8813571U1 (en) | 1988-10-28 | 1988-10-28 | |
| DEG8813571.3 | 1988-10-28 | ||
| EP89118483A EP0365887B1 (en) | 1988-10-28 | 1989-10-05 | Filter cartridge for a liquid-filtration apparatus, especially for water filters |
| EP89118483.0 | 1989-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2001500A1 true CA2001500A1 (en) | 1990-04-28 |
Family
ID=25953701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2001500 Abandoned CA2001500A1 (en) | 1988-10-28 | 1989-10-25 | Filter cartridge for use in a device for filtering liquid in particular drinking water |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2001500A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012130329A1 (en) * | 2011-04-01 | 2012-10-04 | Aktiebolaget Electrolux | A filter unit and a water filtering device comprising a filter unit |
-
1989
- 1989-10-25 CA CA 2001500 patent/CA2001500A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012130329A1 (en) * | 2011-04-01 | 2012-10-04 | Aktiebolaget Electrolux | A filter unit and a water filtering device comprising a filter unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |