WO2000009449A2 - Portable water filtration system - Google Patents
Portable water filtration system Download PDFInfo
- Publication number
- WO2000009449A2 WO2000009449A2 PCT/US1999/018409 US9918409W WO0009449A2 WO 2000009449 A2 WO2000009449 A2 WO 2000009449A2 US 9918409 W US9918409 W US 9918409W WO 0009449 A2 WO0009449 A2 WO 0009449A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- bladder
- flexible
- inlet housing
- ring
- Prior art date
Links
Classifications
-
- 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
- C02F1/002—Processes for the treatment of water whereby the filtration technique is of importance using small portable filters for producing potable water, e.g. personal travel or emergency equipment, survival kits, combat gear
Definitions
- This invention relates to water filtration and more particularly to an improved portable water filtration system.
- Filtration media is relatively expensive with the cost of replacement often surpassing the cost of the rest of the filtration system. To enhance filter media longevity, it is important to minimize the amount of impurities that reach the filter media and to filter only the volume of water that will actually be used. Much of the prior art filters specific quantities of water regardless of the amount used.
- Prior art portable water filtration systems have the filter media incorporated into the container which reduces the volume of water which can be held in the container and necessitates the incorporation of larger sized containers into the system. Since filter media commonly have an electric charge associated with them, placing the media in a water container allows an ongoing or passive purification to occur. Since this purification may be directed to water that is never used, the media is prematurely exhausted. Also, since most cartridges are not translucent, visual inspection of the condition of the seals, filters, filter media, etc. is not readily possible.
- an improved portable water filtration system wherein the filter media is located in-line with a tube that dispenses water from a collapsible bladder source. Typically only the volume of water actually being consumed at a particular moment is purified on demand.
- FIG. 1 is a perspective view of the water filtration system according to the present invention
- FIG. 2 is a perspective view of a filter cartridge housing according to the present invention
- FIG. 3 is a is a perspective view of a filter cartridge
- FIG. 4 is a cross sectional view of the preferred embodiment of the filter cartridge
- FIG. 5 is a cross sectional view of an alternate embodiment of the filter cartridge.
- FIG. 6 is a cross sectional view of another embodiment of the filter cartridge with a different style pre-filter.
- FIG. 1 a perspective view of the water filtration system according to the preferred embodiment, the general assembly of the components can be seen.
- the system has a flexibly resilient collapsible bladder 2 connected to a flexible delivery tube that has a filter cartridge 10 residing in-line.
- Collapsible bladder 2 is fabricated from a flexibly resilient thin walled polymer, having sealable filler neck 4 and bladder fitting 6 located at distal ends.
- Bladder 2 is connected to a dispensing tip 16 by two sections 8, 14 of a flexible delivery tubing which accommodate the in-line connection of filter cartridge 10.
- Opposite ends of flexible filter tube 8 are secured onto a barbed fitting of bladder 6 and a barbed fitting of filter cartridge 10, while one end of delivery tube 14 is secured onto the barbed fitting of filter cartridge 10 and the opposite end of tube 14 is connected to dispensing tip 16.
- a cover 18 releasably houses collapsible bladder 2 therewithin and is adapted to secure filter cartridge 10 onto the exterior surface of the cover 18 by use of releasable retention straps 20.
- Cover 18 also accommodates the attachment of carrying straps (not shown) onto loops 21 which are suitably mounted to left and right edges of the cover at the end nearest the filler neck.
- Filler neck 4 is suitably a cylindrically shaped opening into the interior of the bladder, and has threads formed on the exterior thereof.
- a threaded cap 22 is suitably configured to engage the threads of the filler neck to form a watertight seal. Cap 22 is prevented from accidentally being lost by connection to filler neck 4 via tether 24.
- a removable primary filter 26 is provided comprising of a screen filter securely affixed to a flexible O-ring 28, which is suitably sized to engage a circumferential groove 30 formed in the interior wall of filler neck 4. Groove 30 is spaced away somewhat from the end of the filler neck that is most distal from the bladder.
- filter cartridge housing 32 comprises two cylindrical dome-shaped housing halves, outlet housing 34 and inlet housing 36, and an O-ring 38.
- the housings are constructed out of a plastic or suitable polymer, and O-ring 38 is fabricated from a rubber or polymer with suitable flexibility characteristics.
- inlet housing 36 is translucent to allow visual inspection of the filter cartridge components.
- Inlet housing 36 has a wide, open end and a narrow, more closed end, and is threaded with threads 40 on the internal wall of the open end thereof.
- a circumferential land surface 42 is formed adjacent to the innermost thread so as to act as a seat for O-ring 38 to fit against.
- Outlet housing 34 is correspondingly shaped, and is threaded on the external wall of its open end, for engagement with the threads of the inlet housing.
- O-ring 38 compresses between land surface 42 and the leading edge of outlet housing 34, thereby forming a watertight seal.
- Outlet housing 34 has an outlet barb fitting 44 formed centrally of dome section 43 opposite the open end of the house, parallel to the longitudinal axis of the housing.
- Barb fitting 44 has a longitudinal outlet orifice 46 therethrough.
- Inlet housing 36 has corresponding inlet barb fitting 48 with inlet orifice 49 (FIG. 4) located centrally thereon on dome portion 45 opposite the open end of the housing.
- Outlet housing 34 has plural depressions 50 equally spaced circumferentially thereon, while inlet housing 36 carries plural longitudinal ribs 53 (see FIG. 1) spaced equally about the periphery of the housing, to enable a user to easily grasp the filter for disassembling the housing.
- ribs 53 are not shown in FIGs. 2 and 3.
- the inlet and outlet fittings are barbed, in alternate embodiments they may be of any configuration adaptable to the attachment of flexible tubing.
- the assembled filter cartridge 10 includes a filter media cone 52 and pre-filter 51 therewithin.
- the filter media cone is formed as an open ended bell-shaped configuration.
- Filter media cone 52 is frictionally engaged in outlet housing 34 between adhesion ring 60 formed inside the closed end of the housing and the inner surface of outlet housing 34, and is secured in this position by a suitable non-porous waterproof adhesive that resides at least in cavity 62 and bonds and seals all areas of contact between filter media cone 52, adhesion ring 60, and the inner surface of outlet housing 34. This manner of securement eliminates the possibility of any impure water bypassing filter media cone 52 and reaching the dispensing tip in an impure state.
- Pre-filter 51 is a substantially circular, dish- shaped 25 micron stainless steel screen 54 that has its peripheral edge molded into a sealing gasket 56. Sealing gasket 56 is fabricated from a suitably flexible polymer. The approximate central region of screen 54 has a secondary dish-shaped depression 58. When the filter cartridge 32 is assembled, pre-filter 51 is positioned in filter cartridge such that the external edge of sealing gasket 56 contacts the inner surface of inlet housing 36 thereby forming a watertight seal. As will be understood by reference to the figures, the effect of the two dished depressions is to impart a spring-like or resilient property to screen 54.
- filter media cone 52 contacts secondary dish- shaped depression 58 on the concave up face thereof, compressing screen 54 and exerting a force on sealing gasket 56 which ensures a continuous seal between inlet housing 36 and pre-filter 51.
- This design prevents the possibility of any water reaching filter media cone 52 without first passing through pre-filter 51.
- this seal is made at corner edge 64 of sealing gasket 56; however, in an al t ernate embodiment (FIG. 5) , inlet housing 36 has internal ring profile 68 that corresponds to side profile 66 of sealing gasket 56 so that the seal is made along side profile 66 of gasket 56.
- impure water is added into bladder 2 through filler neck 4 with cap 22 removed.
- the impure water passes through the screen of primary filter 26 which removes any gross impurities. If primary filter 26 clogs, it may be easily removed and backwashed or scrubbed. Removal of primary filter 26 for cleaning is accomplished by pulling on the flexible screen to deform O-ring 28 until it is no longer frictionally held in place in circumferential groove 30. (Installation or replacement of primary filter 26 after cleaning follows the reverse procedure.)
- cap 22 is threadably engaged onto filler neck 4 thereby sealing filler neck 4 watertight.
- the purification process is initiated by drawing a partial vacuum at dispensing tip 16, by manually pressurizing bladder 2 by squeezing, or through a combination of these two methods. Since bladder 2 is watertight, its flexibly resilient thin walls collapse as water is urged from it, thereby ensuring the system has an "on demand" delivery since there are no forces urging the flow of water unless initiated by the user. This type of system requires no backflow valves and only water which is to be used is purified. In operation, since this system purifies only the volume of water being used on demand, the life of the filter media is thereby prolonged. Additionally, the system will function regardless of the spatial orientation of bladder 2.
- Filter media cone 52 has a bell like configuration, with a substantially hollow interior formed therewithin, so as to maximize the filtration surface area available for the impure water to pass through. This reduces the pressure required to urge the flow of water through the system.
- the purification of water from bladder 2 can be initiated solely by suction applied from the human mouth on dispensing tip 16.
- filter media cone 52 is arranged in-line, and because the flow of water is "on demand" only, the filter media contacts a relatively small volume of water when no water is flowing, providing an advantage over filter media disposed inside water containers, because most filter media are electrically charged and have a limited number of absorption or adsorption sites thereon.
- a typical media constituent is an activated carbon, for example. These media continue to passively filter any volume of water that the media is placed within, thus prematurely and unnecessarily exhausting the filter media.
- the design of the filter cartridge of the present invention and its in-line placement minimizes this problem.
- the pre-filter in this embodiment is of different construction.
- the pre-filter comprises a disk, wafer or plug member 70 that is of substantially sufficient diameter and thickness to be wedged between the filter media 52 and the interior profile 68.
- the pre-filter 70 is suitably made of a spun polypropylene, a paper media, a polyester or the like. It is also suitably made of a woven metal or other synthetic.
- the pre- filter has openings therein in the range of 40 to 1 microns, with an average of about 19 microns.
- the pre-filter 70 is relatively thick, the thickness will vary depending on the substance from which the pre-filter is made. Such variations in thickness are accommodated by moving the profile 68 either closer or farther away from the filter media 52, so that the disk 70 is secured between the filter media and the profile 68 when the filter body halves are assembled.
- a spacer member may be positioned either between the profile 68 and the disk 70 or between the disk 70 and the filter media 52, to ensure a consistent seal and placement of the pre-filter.
- filter media cartridge 10 is capable of purifying a minimum of 750 liters of water from any freshwater source, removing substantially all inorganics, organics, radiological chemicals and microbiological impurities therein.
- the filter will remove Giardia, Cryptosporidium, E.Coli, household cleaning compounds, industrial and agricultural wastes, herbicides, pesticides and insecticides from the water, as well as a number of trace metals and turbidity.
- a disinfectant such as iodine may be added to the water.
- the filter media will remove the odor, color and taste of the disinfectant from the water, resulting in a pleasant tasting water even though iodine or the like had been added to treat for the possible presence of viruses.
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU56739/99A AU5673999A (en) | 1998-08-11 | 1999-08-11 | Portable water filtration system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9618998P | 1998-08-11 | 1998-08-11 | |
US60/096,189 | 1998-08-11 | ||
US37252399A | 1999-08-11 | 1999-08-11 | |
US09/372,523 | 1999-08-11 |
Publications (4)
Publication Number | Publication Date |
---|---|
WO2000009449A2 true WO2000009449A2 (en) | 2000-02-24 |
WO2000009449A3 WO2000009449A3 (en) | 2000-06-29 |
WO2000009449A8 WO2000009449A8 (en) | 2000-08-03 |
WO2000009449A9 WO2000009449A9 (en) | 2000-11-02 |
Family
ID=26791384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/018409 WO2000009449A2 (en) | 1998-08-11 | 1999-08-11 | Portable water filtration system |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2000009449A2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003068689A1 (en) * | 2002-02-12 | 2003-08-21 | Innova Pure Water Inc. | In-line hydration pack biological filter |
WO2004028290A1 (en) * | 2002-09-26 | 2004-04-08 | Hydro-Photon, Inc. | Uv led based water purification module for intermittantly operable flow-through hydration systems |
US20110220568A1 (en) * | 2010-03-12 | 2011-09-15 | Clean & Clear Corporation | Portable filter assemblies |
CN102849874A (en) * | 2012-09-20 | 2013-01-02 | 沁园集团股份有限公司 | Sterilizing filtering element and water purifying device utilizing same |
US8828222B2 (en) | 2002-09-26 | 2014-09-09 | Hydro-Photon, Inc. | Photocatalytic intermittent flow-through purification module |
US8872130B1 (en) | 2012-03-19 | 2014-10-28 | Meridian Design, Inc. | UVC water purifier system and method |
US8975596B1 (en) | 2012-07-20 | 2015-03-10 | Meridian Design, Inc. | Water purifying drink containers |
US9212067B2 (en) | 2012-05-30 | 2015-12-15 | Flozinc, Llc | Water bottle with flow meter |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
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GB577449A (en) * | 1943-10-28 | 1946-05-17 | Permutit Co Ltd | Improvements in devices for use in the treatment of liquids |
US3715035A (en) * | 1971-04-12 | 1973-02-06 | J Welsh | High capacity portable water purifier |
US4443336A (en) * | 1982-10-04 | 1984-04-17 | Bennethum Mary L | Survival and water purification system |
US5045195A (en) * | 1990-01-16 | 1991-09-03 | Accuventure, Inc. | Personal drinking water purification tube |
DE4206862A1 (en) * | 1992-03-05 | 1993-09-09 | Egbert F Ried | Liq. container - has distortable body with connection at the base for the outlet with valve and filter |
US5362385A (en) * | 1993-05-26 | 1994-11-08 | Neal A. Klegerman | Portable water filtering device |
WO1998005560A2 (en) * | 1996-08-04 | 1998-02-12 | Source Vagabond Systems Ltd. | A flexible container for storing and dispensing liquids |
US5816457A (en) * | 1995-08-11 | 1998-10-06 | Bianchi International | Hydration system |
US5913456A (en) * | 1997-09-16 | 1999-06-22 | Dikeman; W. Cary | Pressurized portable drinking system |
US5919365A (en) * | 1997-07-21 | 1999-07-06 | Collette; Daniel | Filter device for drinking container |
-
1999
- 1999-08-11 WO PCT/US1999/018409 patent/WO2000009449A2/en active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB577449A (en) * | 1943-10-28 | 1946-05-17 | Permutit Co Ltd | Improvements in devices for use in the treatment of liquids |
US3715035A (en) * | 1971-04-12 | 1973-02-06 | J Welsh | High capacity portable water purifier |
US4443336A (en) * | 1982-10-04 | 1984-04-17 | Bennethum Mary L | Survival and water purification system |
US5045195A (en) * | 1990-01-16 | 1991-09-03 | Accuventure, Inc. | Personal drinking water purification tube |
DE4206862A1 (en) * | 1992-03-05 | 1993-09-09 | Egbert F Ried | Liq. container - has distortable body with connection at the base for the outlet with valve and filter |
US5362385A (en) * | 1993-05-26 | 1994-11-08 | Neal A. Klegerman | Portable water filtering device |
US5816457A (en) * | 1995-08-11 | 1998-10-06 | Bianchi International | Hydration system |
WO1998005560A2 (en) * | 1996-08-04 | 1998-02-12 | Source Vagabond Systems Ltd. | A flexible container for storing and dispensing liquids |
US5919365A (en) * | 1997-07-21 | 1999-07-06 | Collette; Daniel | Filter device for drinking container |
US5913456A (en) * | 1997-09-16 | 1999-06-22 | Dikeman; W. Cary | Pressurized portable drinking system |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003068689A1 (en) * | 2002-02-12 | 2003-08-21 | Innova Pure Water Inc. | In-line hydration pack biological filter |
US8828222B2 (en) | 2002-09-26 | 2014-09-09 | Hydro-Photon, Inc. | Photocatalytic intermittent flow-through purification module |
WO2004028290A1 (en) * | 2002-09-26 | 2004-04-08 | Hydro-Photon, Inc. | Uv led based water purification module for intermittantly operable flow-through hydration systems |
CN100443011C (en) * | 2002-09-26 | 2008-12-17 | 海德罗-光子公司 | UV LED based water purification module for intermittently operable flow-through hydration systems |
US7641790B2 (en) | 2002-09-26 | 2010-01-05 | Hydro-Photon, Inc. | UV LED based water purification module for intermittently operable flow-through hydration systems |
US8226831B2 (en) | 2002-09-26 | 2012-07-24 | Hydro-Photon, Inc. | UV LED based water purification module for intermittently operable flow-through hydration systems |
US9346687B1 (en) | 2010-03-04 | 2016-05-24 | Meridian Design, Inc. | Water purifying drink system and method |
US20110220568A1 (en) * | 2010-03-12 | 2011-09-15 | Clean & Clear Corporation | Portable filter assemblies |
US8872130B1 (en) | 2012-03-19 | 2014-10-28 | Meridian Design, Inc. | UVC water purifier system and method |
US9212067B2 (en) | 2012-05-30 | 2015-12-15 | Flozinc, Llc | Water bottle with flow meter |
US8975596B1 (en) | 2012-07-20 | 2015-03-10 | Meridian Design, Inc. | Water purifying drink containers |
CN102849874B (en) * | 2012-09-20 | 2013-11-13 | 沁园集团股份有限公司 | Sterilizing filtering element and water purifying device utilizing same |
CN102849874A (en) * | 2012-09-20 | 2013-01-02 | 沁园集团股份有限公司 | Sterilizing filtering element and water purifying device utilizing same |
Also Published As
Publication number | Publication date |
---|---|
WO2000009449A9 (en) | 2000-11-02 |
WO2000009449A8 (en) | 2000-08-03 |
WO2000009449A3 (en) | 2000-06-29 |
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