US20020005377A1 - Filter cartridge for gravity-fed water treatment devices - Google Patents
Filter cartridge for gravity-fed water treatment devices Download PDFInfo
- Publication number
- US20020005377A1 US20020005377A1 US09/957,429 US95742901A US2002005377A1 US 20020005377 A1 US20020005377 A1 US 20020005377A1 US 95742901 A US95742901 A US 95742901A US 2002005377 A1 US2002005377 A1 US 2002005377A1
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- United States
- Prior art keywords
- filter
- porous particulate
- particulate filter
- cartridge
- sidewalls
- 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.)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
- C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/006—Cartridges
Definitions
- the filter cartridge 20 described herein can be used in a variety of gravity-fed water treatment devices.
- this preferred embodiment of the filter cartridge 20 contains a porous particulate filter 24 with granular media 26 disposed within particulate filter 24 .
- Filter cartridge 20 also has a shell 22 which surrounds porous particulate filter 24 to provide mechanical support for the particulate filter.
- Shell 22 has a collar 36 which seals porous particulate filter 24 to cartridge 20 so that water flowing through the cartridge must pass through porous particulate filter 24 and is, thereby, treated.
- Granular media 26 is typically disposed within shell 22 to provide additional water purification. As shown in FIG. 2, granular media 26 is preferably disposed within porous particulate filter 24 . This configuration is advantageous because particulate filter 24 will prevent granular media 26 from coming out of filter cartridge 20 . In addition, granular media can be disposed within a separate granular media containment region 41 of shell 22 (see FIG. 2).
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- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Clinical Laboratory Science (AREA)
- Health & Medical Sciences (AREA)
- Water Treatment By Sorption (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
A filter cartridge for a gravity-fed water treatment device having a porous particulate filter disposed therein. The porous particulate filter has an open upper end, a closed lower end, and sidewalls therebetween. Water is treated as it flows through the sidewalls of the filter. The cartridge also contains granular media disposed within the porous particulate filter.
Description
- This invention relates to filter cartridges for use in gravity-fed water treatment systems. In particular, this invention relates to a filter cartridge having novel filter media.
- Domestic water treatment devices are known in the art. Among these devices are self-contained systems which process water in batches. Examples of batch devices are pitchers/carafes and larger reservoirs where treated water is poured, for example, from a spigot. These self-contained systems typically have upper and lower chambers separated by a filter cartridge. They rely on gravity to force water from the upper chamber, through the cartridge, and into the lower chamber, thereby producing treated water.
- The presence of unwanted and potentially harmful contaminants in water, especially drinking water, is of concern to many people. This concern creates a desire for water treatment devices in the home and elsewhere. Many water treatment devices and methods have been developed to remove or neutralize chemical and particulate contaminants. Some of these devices and methods incorporate chemically active materials to treat the water. For example, activated carbon is capable of removing the bad taste and odor from water as well as chlorine and other reactive chemicals. Ion exchange resins are useful for removing metal and other ions from water. However, no single material or chemical has been found that will remove all contaminants.
- In addition to chemical and particulate contaminants, water often contains biological contaminants. These contaminants often can not be entirely removed by activated carbon, ion exchange resins, or other chemically active water purifiers. The biological contaminants may be susceptible to harsher chemical treatment, but such chemicals are, typically, themselves contaminants or can not be easily incorporated in gravity-fed treatment devices, especially those for household use. In addition to being resistant to removal by standard chemical means, many of these biological contaminants, such as protozoan cysts like cryptosporidium, are only a few microns in size.
- Because of their small size and the relative unavailability of suitable chemical removal methods for these biological contaminants, a gravity-fed water treatment device which can remove protozoan cysts and still retain satisfactory flow rate has been very difficult to develop. Present devices which filter cysts out of water require pressurization, either from the tap or by manual pumping, to achieve a satisfactory flow rate. However, such devices are relatively complex and expensive, and in the case of manual pressurization systems, harder to operate. Thus, there is a need for a gravity-fed water treatment device that is capable of removing biological contaminants, including cysts like cryptosporidium, while providing an acceptable flow rate.
- According to the present invention, a filter cartridge for a gravity-fed water treatment is provided. In one aspect of the invention, the filter cartridge includes a porous particulate filter that has an open upper end, a closed lower end, and sidewalls between the two ends. The porous particulate filter is sealed to a portion of the filter cartridge by a connecting member. Water is treated as the water flows into the open upper end and through the sidewalls of the porous particulate filter. Air within the filter, that is displaced by incoming water, flows out of the open upper end of the filter.
- In another aspect of invention, the filter cartridge includes a porous particulate filter with sidewalls and an inlet. Granular media is contained within the sidewalls of the filter. Water is treated as it flows through the inlet of the filter, through the granular media, and radially outward through the sidewalls of the filter.
- In a further aspect of the invention, the filter cartridge includes a porous particulate filter which includes glass fibers and a hydrophilic binder. The porous particulate filter is sealed to a portion of the filter cartridge by a connecting member. Water that is treated by the filter cartridge has greater than 99.95% of 3-5 micron cysts particles removed.
- These and other advantages and features of novelty which characterize the invention are pointed out with particularity in the claims annexed hereto. However, for a better understanding of the invention and its advantages, reference should be made to the drawings which form a further part hereof, and to the accompanying descriptive matter in which there is illustrated and described a preferred embodiment of the invention.
- A preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein like reference numerals identify corresponding parts:
- FIG. 1 is an exploded perspective view of an embodiment of a filter cartridge according to the present invention; and
- FIG. 2 is a partial cross-sectional view of the filter cartridge shown in FIG. 1.
- The
filter cartridge 20 described herein can be used in a variety of gravity-fed water treatment devices. Referring to FIGS. 1 and 2, this preferred embodiment of thefilter cartridge 20 contains aporous particulate filter 24 withgranular media 26 disposed withinparticulate filter 24.Filter cartridge 20 also has ashell 22 which surroundsporous particulate filter 24 to provide mechanical support for the particulate filter.Shell 22 has acollar 36 which seals porousparticulate filter 24 tocartridge 20 so that water flowing through the cartridge must pass throughporous particulate filter 24 and is, thereby, treated. -
Porous particulate filter 24 mechanically filters particles and biological contaminants, such as protozoan cysts, out of the water. To effectively filter biological contaminants, porousparticulate filter 24 should have pores smaller than the size of the contaminants that are to be filtered. Biological cysts, such as cryptosporidium, are only a few microns in size. An effective cryptosporidium filter must have pores that are less than about 5 microns, and preferably less than about 2 microns, in diameter. Thus, porousparticulate filter 24 is, preferably, microporous, which means that the particulate filter has pores which are approximately 1-3 microns or smaller in size. - Preferably
porous particulate filter 24 removes greater than 99.95% of 3-4 micron cysts particles from water treated with the filter cartridge. The level of cyst filtration is determined using the protocols of NSF 53 §6.5 and 6.12, incorporated herein by reference. - Porous
particulate filter 24 is preferably formed in ashape having sidewalls 25 and an open upper end.Sidewalls 25 of porousparticulate filter 24 are substantially cylindrical. However, other shapes of the sidewalls are also included within the scope of the invention. Moreover,sidewalls 25 ofparticulate filter 24 may be flat or pleated, as shown in FIG. 1. Pleated sidewalls provide greater filter surface area than do flat sidewalls for an otherwise identical filter configuration. However, the pleats should not be closely spaced or the flow rate through the pleats will be decreased. - The upper end of
particulate filter 24 is at least partially open so that water can flow intoparticulate filter 24 and air withinparticulate filter 24 can escape as it is displaced by the water. The bottom end of porous particulate filter may be closed (not shown) or open (see FIGS. 1 and 2). If the bottom end is open thenporous particulate filter 24 should be attached to an object, such as abottom cap 29 ofshell 22, which will prevent the flow of water out of the open bottom end ofparticulate filter 24. -
Porous particulate filter 24 can be formed from a wide variety of materials. Preferably,sidewalls 25 ofporous particulate filter 24 are made from a hydrophilic, microporous filter media. Optionally, if the bottom end of porousparticulate filter 24 is closed, then the bottom can also be made from the hydrophilic, microporous filter media. One example of a suitable hydrophilic, microporous filter media is a carbon block which has been hollowed out to create sidewalls and a open upper end. - The preferred hydrophilic, microporous filter media for the construction of porous
particulate filter 24 is fibrous sheet filter media. The fibers of this sheet filter media can be either natural, such as fiber made of cellulose or cellulose derivatives, or synthetic, such as fibers made from polymers or glass. Preferably, the fibers are synthetic fibers, and more preferably, the fibers are glass microfibers. Often natural fibers, such as cellulose fibers, are thicker than synthetic fibers resulting in fewer pores and a correspondingly slower flow rate. - The flow rate of water through a given porous particulate filter is of critical importance in determining the acceptability of porous
particulate filter 24 for a gravity-fed water treatment device. Flow rate is typically determined by the size of the pores, the pressure applied to the water to push it through the pores, and the composition of the filter. In gravity-fed devices, such as carafes or household water storage containers, the pressure exerted on water to push it throughfilter cartridge 20 is due only to a gravitational force on the water itself. For household gravity-fed water treatment devices, such as carafes, the pressure exerted on the water is typically less than about 0.5 lb/in2. Consequently, the gravity-induced flow rate through a typical microporous particulate filter is very slow and not practical for a gravity-fed water treatment device. - To overcome this limitation, the preferred porous
particulate filters 24 of the invention contain hydrophilic material. Hydrophilic materials, as defined for purposes of the present invention, are those materials, which when dry, are quickly wetted (i.e., they absorb droplets of water quickly). The hydrophilicity of these materials is due to an attractive force between the hydrophilic material and water which is greater than the surface tension of the water at the water/filter interface (i.e. the attractive force between the individual water molecules at the interface). - The hydrophilicity of porous
particulate filter 24 may be a result of the hydrophilic nature of the fibers or other material of the porous particulate filter. Alternatively, the hydrophilicity of the filter may be due to an additive to the material of the filter. Such an additive may be capable of creating a hydrophilic particulate filter even if the filter contains non-hydrophilic or hydrophobic fibers. - A hydrophilic additive to the filter may also serve other functions within the filter material. One example of such an additive is a hydrophilic binder which is added to the media, not only to impart hydrophilicity to the binder, but also to bind the microfibers of the media together to form a sheet. Hydrophilic sheet filter media having these properties is available from Alhstrom, Mt. Holly Springs, Pa. (Grade 2194-235). Suitable hydrophilic binder for use in binding glass microfibers is available from Goodrich (Part No. 26450).
- Sheet filter media was obtained from the above-named source. The sheet filter media had an average pore size of about 1.2 μm and a thickness of about 0.024 in. The porous particulate filter was about 3 in. tall and had a 1.75 in. outer diameter. The porous particulate filter was pleated to give40 pleats uniformly spaced around the filter with a pleat depth of about 0.25 in., giving the filter an inner diameter of 1.25 in.
- To protect porous
particulate filter 24 from damage, ashell 22 may be disposed aroundfilter 24.Shell 22 has three connectable pieces, atop cap 28, abottom cap 29, and abody 30, as shown in FIGS. 1 and 2. This configuration allows for easy placement ofparticulate filter 24 infilter cartridge 20. Other shell configurations may be used and are included within the scope of the invention. -
Shell 22 also has one ormore inlet apertures 32 and one ormore outlet apertures 34 through which water enters and exits filtercartridge 20, respectively.Inlet apertures 32 are positioned in an upper portion ofshell 22 in either top cap 28 (see FIGS. 1 and 2) or an upper portion of body 30 (not shown). -
Outlet apertures 34 are typically located in thebottom cap 29, but could also be on the side ofbody 30.Inlet apertures 32 andoutlet apertures 34 are positioned withinshell 22 so that water flowing intoinlet apertures 32 goes throughgranular media 26 and porousparticulate filter 24 prior to exiting outoutlet apertures 34. - Porous
particulate filter 24 is adhesively connected tobottom cap 29 to provide a seal to prevent water from flowing around the bottom offilter 24.Bottom cap 29 also contains one or moreridged columns 31 which, whenbottom cap 29 is slid intobody 30, will contact a lip of anindentation 35 in the interior portion ofbody 30 to firmly holdcap 29 in place. There are spaces betweenridged columns 31 ofcap 29 to allow water to flow out offilter cartridge 20 throughoutlet apertures 34 inbottom cap 29. -
Shell 22 also has acollar 36 acting as a connecting member, which provides a seal between porousparticulate filter 24 andfilter cartridge 20 so that water flowing throughinlet apertures 32 must pass through porousparticulate filter 24 before exiting throughoutlet apertures 34.Collar 36 has an annular cup formed by acylinder 37 and abase 39. Porousparticulate filter 24 is adhesively attached within the annular cup formed bycylinder 37 andbase 39 to provide a water-tight connection tocollar 36. Other methods of sealing porousparticulate filter 24 tocartridge 20 are also included within the scope of the invention. -
Shell 22 is typically constructed of a plastic or polymeric material.Shell 22 is preferably made from a molded plastic. - The flow rate of water through porous
particulate filter 24 is often diminished by the presence of air adjacent to porousparticulate filter 24. Air trapped nearparticulate filter 24 forms an interface with the water inparticulate filter 24. There will be a surface tension associated with this interface. Unless there is enough pressure to break this surface tension, the water will not flow. Thus, it is desirable that there be a path for the escape of air as it is displaced by water flowing intofilter cartridge 20. One advantage of the filter configuration depicted in FIGS. 1 and 2 is that air in the interior of the shape formed by porousparticulate filter 24 can flow out the open upper end of porousparticulate filter 24 andexit filter cartridge 20 throughinlet apertures 32. - When
shell 22 is provided around porousparticulate filter 24, air may also be trapped ingap 38 betweenshell 22 andparticulate filter 24. The presence of trapped air may reduce the flow rate throughfilter 24 as the water level withingap 38 rises. -
Air outlet apertures 40 are provided inshell 22 so that the air can escape fromgap 38, especially when outlet apertures 34 are below the water level of the water treatment device.Air outlet apertures 40 are often provided near the upper end ofgap 38 which is proximate the sealed connection betweenshell 22 and porousparticulate filter 24. This configuration will allow most or all of the air to escape the cartridge as air will naturally rise to the highest possible level due to the buoyancy of air in water. In addition to providing an escape path for air,air outlet apertures 38 may also function as water outlet apertures. -
Granular media 26 is typically disposed withinshell 22 to provide additional water purification. As shown in FIG. 2,granular media 26 is preferably disposed within porousparticulate filter 24. This configuration is advantageous becauseparticulate filter 24 will preventgranular media 26 from coming out offilter cartridge 20. In addition, granular media can be disposed within a separate granularmedia containment region 41 of shell 22 (see FIG. 2). -
Granular media 26 comprises chemicals or materials that are suitable for treating water.Granular media 26 typically includes chemicals or other materials that are capable of removing, reducing, or deactivating one or more of the following elements: bad odor, bad taste, organic contaminants, chemical contaminants, and metal or other unwanted ions, such as chlorine. Suitablegranular media 26 includes carbon, zeolites, an ion exchange resin, or a combination thereof. A preferred form of carbon for use as granular media is granular activated carbon. A preferred granular media for use in the filter cartridges of the invention is a mixture of a weak-acid cation exchange resin and granular activated carbon. - In one embodiment of the invention, at least a portion of
granular media 26 is hydrophilic. Hydrophilic granular media includes granular activated carbon. A hydrophilic granular media disposed within porousparticulate filter 24 may facilitate the flow of water through porousparticulate filter 24. Hydrophilic granular media in contact with porousparticulate filter 24 may provide a less resistive flow path for water into and through the (preferably hydrophilic) sidewalls 25 of porousparticulate filter 24. - It should be understood that the present invention is not limited to the preferred embodiment described above, which is illustrative only. Changes may be made in detail, especially matters of shape, size, arrangement of parts, or materials of components within the principles of the invention to the full extent indicated by the broad general meanings of the terms in which the appended claims are expressed.
Claims (26)
1. A filter cartridge for a gravity-fed water treatment device, comprising:
a porous particulate filter having an open upper end, a closed lower end, and sidewalls therebetween; and
a connecting member sealing said porous particulate filter to a portion of the filter cartridge proximate said upper end of said filter;
wherein as water flows into said open upper end and through said sidewalls of said porous particulate filter, air is displaced out of said open upper end.
2. The filter cartridge of claim 1 , wherein the sidewalls of the porous particulate filter are substantially cylindrical.
3. The filter cartridge of claim 1 , wherein the porous particulate filter is microporous.
4. The filter cartridge of claim 1 , wherein the porous particulate filter comprises sheet filter media.
5. The filter cartridge of claim 1 , wherein the porous particulate filter is pleated.
6. The filter cartridge of claim 1 , wherein the porous particulate filter comprises hydrophilic material.
7. The filter cartridge of claim 1 , wherein the filter cartridge further comprises a shell having an inlet and an outlet, the shell being disposed around the porous particulate filter, wherein water is treated as it flows from the inlet of the shell, into the open upper end of the porous particulate filter, through the sidewalls of the filter, and out the outlet of the shell.
8. The filter cartridge of claim 7 , wherein the shell further comprises one or more air-outlet apertures so that, when water enters the cartridge through the inlet of the shell, air is also displaced out of the air-outlet apertures of the shell.
9. A filter for a gravity-fed water treatment device, comprising:
a porous particulate filter having sidewalls and an inlet; and
granular media contained within said sidewalls of said porous particulate filter;
said porous particulate filter and said granular media being constructed and arranged such that water flows into said inlet, through said granular media, and radially outward through said sidewalls of said porous particulate filter as it is treated.
10. The filter of claim 9 , wherein the porous particulate filter comprises sheet filter media.
11. The filter of claim 9 , wherein the sidewalls of the porous particulate filter are substantially cylindrical.
12. The filter of claim 9 , wherein the porous particulate filter is pleated.
13. The filter of claim 9 , wherein the porous particulate filter comprises hydrophilic material.
14. The filter of claim 9 , wherein the porous particulate filter comprises glass microfibers.
15. The filter of claim 14 , wherein the porous particulate filter further comprises a hydrophilic binder to hold the glass microfibers together.
16. The filter of claim 9 , wherein the porous particulate filter is capable of removing protozoan cysts.
17. The filter of claim 9 , wherein the porous particulate filter is microporous.
18. The filter of claim 9 , wherein the granular media is carbon, an ion exchange resin, or a combination thereof.
19. The filter of claim 18 , wherein the carbon in the granular media comprises granular activated carbon.
20. The filter of claim 9 , wherein the granular media is hydrophilic.
21. A filter cartridge for a gravity-fed water treatment device, comprising:
a porous particulate filter having glass fibers and a hydrophilic binder to bind the fibers together, the filter being capable of removing greater than 99.95% of 3-4 micron cyst particles from water; and
a connecting member sealing said porous particulate filter to a portion of the filter cartridge.
22. The filter cartridge of claim 21 , wherein the glass fibers comprise glass microfibers.
23. The filter cartridge of claim 21 , wherein the porous particulate filter has sidewalls.
24. The filter cartridge of claim 21 , wherein the porous particulate filter is substantially cylindrical.
25. The filter cartridge of claim 21 , wherein the porous particulate filter comprises sheet filter media.
26. The filter cartridge of claim 21 , wherein the porous particulate filter is pleated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US09/957,429 US20020005377A1 (en) | 1997-04-16 | 2001-09-19 | Filter cartridge for gravity-fed water treatment devices |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/843,458 US6290848B1 (en) | 1997-04-16 | 1997-04-16 | Filter cartridge for gravity-fed water treatment devices |
US09/957,429 US20020005377A1 (en) | 1997-04-16 | 2001-09-19 | Filter cartridge for gravity-fed water treatment devices |
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US08/843,458 Continuation US6290848B1 (en) | 1997-04-16 | 1997-04-16 | Filter cartridge for gravity-fed water treatment devices |
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US20020005377A1 true US20020005377A1 (en) | 2002-01-17 |
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US08/843,458 Expired - Lifetime US6290848B1 (en) | 1997-04-16 | 1997-04-16 | Filter cartridge for gravity-fed water treatment devices |
US09/957,429 Abandoned US20020005377A1 (en) | 1997-04-16 | 2001-09-19 | Filter cartridge for gravity-fed water treatment devices |
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US08/843,458 Expired - Lifetime US6290848B1 (en) | 1997-04-16 | 1997-04-16 | Filter cartridge for gravity-fed water treatment devices |
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US (2) | US6290848B1 (en) |
EP (1) | EP0975552B1 (en) |
JP (3) | JP2001520572A (en) |
KR (1) | KR100480372B1 (en) |
CN (1) | CN1252777A (en) |
AU (1) | AU6868798A (en) |
BR (1) | BR9809094A (en) |
CA (1) | CA2286223C (en) |
DE (1) | DE69837991T2 (en) |
RU (1) | RU2225744C2 (en) |
TW (1) | TW422715B (en) |
WO (1) | WO1998046534A1 (en) |
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US20060191824A1 (en) * | 2004-05-24 | 2006-08-31 | Arett Richard A | Fluid container having an additive dispensing system |
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US7390343B2 (en) * | 2005-09-12 | 2008-06-24 | Argonide Corporation | Drinking water filtration device |
EP1931441A1 (en) * | 2005-09-12 | 2008-06-18 | Argonide Corporation | Electrostatic air filter |
WO2007133834A1 (en) * | 2006-03-09 | 2007-11-22 | Fka Distributing Co. D/B/A Homedics, Inc. | Water purifier |
US7507338B2 (en) * | 2006-10-13 | 2009-03-24 | Filtrex Holdings Pte Ltd. | Universal water purifier unit assembly device |
DE102006058223A1 (en) * | 2006-12-01 | 2008-06-05 | Wp Engineering Ltd. | Method and device for enriching water with magnesium ions |
US8413694B2 (en) * | 2008-06-10 | 2013-04-09 | 3M Innovative Properties Company | Portable fluid treating and dispensing device, systems, articles, and methods |
WO2010024875A1 (en) * | 2008-08-26 | 2010-03-04 | Radio Systems Corporation | Gravity-induced automatic animal watering/feeding device |
US20110303618A1 (en) * | 2008-10-22 | 2011-12-15 | Glenn Cueman | Reusable water filter systems and methods |
KR100920943B1 (en) * | 2009-04-01 | 2009-10-09 | 선보공업주식회사 | Fluid filter for ship |
US8986544B2 (en) | 2009-10-21 | 2015-03-24 | Marmon Water (Singapore) Pte. Ltd. | Vented filter cartridge for water treatment device |
KR102028887B1 (en) | 2009-12-14 | 2019-10-08 | 헬렌 오브 트로이 리미티드 | FILTERS COMPRISING AN ACTIVATED CARBON PARTICLE COATED WITH pDADMAC AND METHODS OF MAKING SAME |
US8664150B2 (en) * | 2010-03-16 | 2014-03-04 | Battelle Energy Alliance, Llc | Methods of producing adsorption media including a metal oxide |
US20140144829A1 (en) * | 2010-05-18 | 2014-05-29 | Mitsubishi Rayon Cleansui Company, Limited | Gravity-Filtration Water Purifier |
JP5552947B2 (en) | 2010-07-30 | 2014-07-16 | ソニー株式会社 | Information processing apparatus, display control method, and display control program |
US9682335B2 (en) * | 2011-02-24 | 2017-06-20 | Saint-Gobain Performance Plastics Corporation | Modular filter capsule apparatus |
RU2555039C2 (en) * | 2011-04-01 | 2015-07-10 | Актиеболагет Электролюкс | Filter, water filtering assembly including said filter |
KR101330154B1 (en) | 2011-08-16 | 2013-11-15 | 김정용 | Apparatus of filtering water |
EP2791061B1 (en) | 2011-12-16 | 2022-06-15 | Helen of Troy Limited | Gravity filter |
KR101434183B1 (en) | 2011-12-29 | 2014-08-29 | 도레이케미칼 주식회사 | Activated Carbon Sheet, Filter Cartridge for Water Purification Using the Same and Manufacturing Method thereof |
KR101397479B1 (en) * | 2012-04-04 | 2014-05-20 | 김정용 | Apparatus of filtering water with a pump |
US9028690B2 (en) * | 2012-04-18 | 2015-05-12 | 3M Innovative Properties Company | Water treatment cartridge |
US9108968B2 (en) | 2012-04-25 | 2015-08-18 | Ppg Industries Ohio, Inc. | Methods for producing 1,5,7-triazabicyclo[4.4.0]dec-5-ene by reaction of a disubstituted carbodiimide and dipropylene triamine |
KR20150021564A (en) | 2012-06-27 | 2015-03-02 | 아고나이드 코포레이션 | Aluminized silicious sorbent and water purification device incorporating the same |
WO2015138888A2 (en) | 2014-03-14 | 2015-09-17 | Protect Plus, Llc | Reusable water filter cartridge device |
CN112870823B (en) * | 2014-12-16 | 2023-05-30 | 圣戈班生物高新材料(杭州)有限公司 | Modular filter capsule device |
MA41868A (en) | 2015-04-01 | 2018-02-06 | Spectrum Brands Inc | DELAY TABLET AND RELATED PROCESSES |
RU2617775C1 (en) * | 2016-05-20 | 2017-04-26 | Закрытое Акционерное Общество "Аквафор Продакшн" (Зао "Аквафор Продакшн") | Filtering module of liquid purification device |
KR102253737B1 (en) | 2018-12-24 | 2021-05-18 | 한국산업기술대학교산학협력단 | Remote monitoring and control system using wireless network |
JP7141350B2 (en) * | 2019-02-22 | 2022-09-22 | 三菱ケミカル・クリンスイ株式会社 | water purification cartridge |
RU2715155C1 (en) * | 2019-07-25 | 2020-02-25 | Акционерное общество "БВТ БАРЬЕР РУС" (АО "БВТ БАРЬЕР РУС") | Pressure filter mineralizing cartridge |
RU2708856C1 (en) * | 2019-07-25 | 2019-12-11 | Акционерное общество "БВТ БАРЬЕР РУС" (АО "БВТ БАРЬЕР РУС") | Gravity filter for purification and softening or mineralization of drinking water |
CN114314713B (en) * | 2022-01-20 | 2023-12-01 | 合肥亦威科技有限公司 | Lifting device of pure water generation system and use method |
Family Cites Families (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL296324A (en) * | 1962-08-06 | |||
US3327859A (en) * | 1963-12-30 | 1967-06-27 | Pall Corp | Portable unit for potable water |
GB1136615A (en) * | 1966-09-29 | 1968-12-11 | Gen Motors Ltd | Multi-media filter units |
CH547113A (en) | 1972-04-04 | 1974-03-29 | Hofer Charles Auguste | CARTRIDGE FILTERS FOR FILTRATION, DISINICIATION AND IMPROVEMENT OF WATER. |
JPS5038173A (en) * | 1973-08-10 | 1975-04-09 | ||
US3972694A (en) | 1974-11-14 | 1976-08-03 | Whatman Reeve Angel Limited | Filter tube |
US4026792A (en) | 1975-01-24 | 1977-05-31 | Herbert L. Kalbfleisch | Filter system and method of filtering animal processing wastes |
GB1566264A (en) * | 1976-04-23 | 1980-04-30 | Whatman Reeve Angel Ltd | Inside-to-outside flow filter tube and method of manufacturing same |
JPS52151478U (en) * | 1976-05-14 | 1977-11-16 | ||
JPS5513678U (en) * | 1978-07-12 | 1980-01-28 | ||
US4212743A (en) * | 1979-01-11 | 1980-07-15 | Universal Water Systems, Inc. | Filter |
US4523995A (en) * | 1981-10-19 | 1985-06-18 | Pall Corporation | Charge-modified microfiber filter sheets |
WO1984004050A1 (en) | 1983-03-16 | 1984-10-25 | Whatman Reeve Angel Plc | Filter cartridge with end caps |
JPS60100013U (en) * | 1983-12-15 | 1985-07-08 | 川野 肇 | filter |
JPH0227854Y2 (en) * | 1985-06-18 | 1990-07-26 | ||
JPS6210008U (en) * | 1985-06-29 | 1987-01-21 | ||
GB2187396B (en) | 1986-03-07 | 1990-03-21 | Pall Corp | Filtering apparatus |
US4828698A (en) * | 1986-03-07 | 1989-05-09 | Pall Corporation | Filtering apparatus |
US4753728A (en) * | 1986-04-07 | 1988-06-28 | Amway Corporation | Water filter |
DE3810441C2 (en) | 1988-03-26 | 1994-09-08 | Brita Wasserfilter | Water purification device with an inlet funnel |
DE68914722T2 (en) * | 1988-06-15 | 1994-08-04 | Pall Corp | Filter arrangement. |
JPH02133490U (en) * | 1989-04-05 | 1990-11-06 | ||
US5013438A (en) * | 1989-11-14 | 1991-05-07 | Lawrence Smith | Fluid filter medium including a tubular fabric member |
US5268093A (en) | 1990-04-05 | 1993-12-07 | Recovery Engineering, Inc. | Portable water purification system |
US5277802A (en) | 1990-04-06 | 1994-01-11 | Healthguard, Incorporated | Dual cartridge filter employing pH control |
US5106500A (en) | 1990-06-20 | 1992-04-21 | Recovery Engineering, Inc. | Portable water purification system including a filter cleaning mechanism |
ATE114992T1 (en) | 1990-07-05 | 1994-12-15 | Filtrox Werk Ag | DEEP BED FILTER, PROCESS FOR MANUFACTURING A FILTER LAYER AND FILTER MODULE. |
JPH04225890A (en) * | 1990-12-27 | 1992-08-14 | Suntory Ltd | Water purifier and method for packing formed fibrous activated carbon into the purifier |
US5139666A (en) | 1991-01-04 | 1992-08-18 | Domotechnica Canada, Inc. | Bottle and filter |
US5128034A (en) | 1991-03-21 | 1992-07-07 | Amway Corporation | Pressure vessel for housing a water filter |
US5731081A (en) * | 1991-10-16 | 1998-03-24 | Hollinee Corporation | Glass fiber evaporative cooler media with melamine formaldehyde binder |
US5225078A (en) | 1992-03-04 | 1993-07-06 | Ametek, Inc. Plymouth Products Division | Pour-through pitcher filter |
JPH06147709A (en) * | 1992-11-02 | 1994-05-27 | Matsushita Refrig Co Ltd | Water purifying device for electric refrigerator |
JPH06213544A (en) * | 1993-01-18 | 1994-08-02 | Hitachi Ltd | Water purifier refrigerator |
JPH079481U (en) * | 1993-07-21 | 1995-02-10 | クリタック株式会社 | Clean water pitcher |
US5579808A (en) * | 1994-04-11 | 1996-12-03 | Moen Incorporated | Permanent core plumbing product |
JPH0824636A (en) * | 1994-07-09 | 1996-01-30 | Toto Ltd | Production of adsorbent and water purifying apparatus using the same |
US5536394A (en) | 1994-11-17 | 1996-07-16 | Recovery Engineering, Inc. | End of life mechanism for water treatment cartridge |
US5612224A (en) * | 1995-02-21 | 1997-03-18 | 21St Century Companies, Inc. | Method for measuring the quantity of lead on the surface of a brass component |
KR100240047B1 (en) * | 1995-07-28 | 2000-01-15 | 오카메 히로무 | Filter element and fabrication method for the same |
US6182453B1 (en) * | 1996-04-08 | 2001-02-06 | Worldwide Water, Inc. | Portable, potable water recovery and dispensing apparatus |
US5895763A (en) * | 1997-04-16 | 1999-04-20 | H.E.R.C. Products Incorporated | Controlled carbonate removal from water conduit systems |
-
1997
- 1997-04-16 US US08/843,458 patent/US6290848B1/en not_active Expired - Lifetime
-
1998
- 1998-03-23 RU RU99123711/15A patent/RU2225744C2/en not_active IP Right Cessation
- 1998-03-23 KR KR10-1999-7009459A patent/KR100480372B1/en not_active IP Right Cessation
- 1998-03-23 DE DE69837991T patent/DE69837991T2/en not_active Expired - Lifetime
- 1998-03-23 JP JP54392298A patent/JP2001520572A/en active Pending
- 1998-03-23 CA CA002286223A patent/CA2286223C/en not_active Expired - Lifetime
- 1998-03-23 BR BR9809094-1A patent/BR9809094A/en not_active IP Right Cessation
- 1998-03-23 WO PCT/US1998/005766 patent/WO1998046534A1/en active IP Right Grant
- 1998-03-23 EP EP98914293A patent/EP0975552B1/en not_active Expired - Lifetime
- 1998-03-23 AU AU68687/98A patent/AU6868798A/en not_active Abandoned
- 1998-03-23 CN CN98804216A patent/CN1252777A/en active Pending
- 1998-03-31 TW TW087104816A patent/TW422715B/en not_active IP Right Cessation
-
2001
- 2001-09-19 US US09/957,429 patent/US20020005377A1/en not_active Abandoned
-
2009
- 2009-04-28 JP JP2009109111A patent/JP2009166042A/en active Pending
-
2010
- 2010-03-25 JP JP2010069839A patent/JP2010172893A/en active Pending
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US8167141B2 (en) | 2004-06-30 | 2012-05-01 | Brita Lp | Gravity flow filter |
US20110073551A1 (en) * | 2006-09-20 | 2011-03-31 | Omnipure Filter Company, Inc. | Filter modules for improved media utilization and use in generally cylindrical housing |
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USD647595S1 (en) | 2007-09-20 | 2011-10-25 | Omnipure Filter Company, Inc. | Filter block for liquid filtration |
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Also Published As
Publication number | Publication date |
---|---|
RU2225744C2 (en) | 2004-03-20 |
US6290848B1 (en) | 2001-09-18 |
TW422715B (en) | 2001-02-21 |
BR9809094A (en) | 2000-08-01 |
KR100480372B1 (en) | 2005-05-04 |
EP0975552B1 (en) | 2007-06-27 |
WO1998046534A1 (en) | 1998-10-22 |
CA2286223A1 (en) | 1998-10-22 |
AU6868798A (en) | 1998-11-11 |
KR20010049175A (en) | 2001-06-15 |
JP2009166042A (en) | 2009-07-30 |
JP2001520572A (en) | 2001-10-30 |
JP2010172893A (en) | 2010-08-12 |
CA2286223C (en) | 2007-05-08 |
EP0975552A1 (en) | 2000-02-02 |
CN1252777A (en) | 2000-05-10 |
DE69837991D1 (en) | 2007-08-09 |
DE69837991T2 (en) | 2008-02-28 |
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