WO1997041066A2 - Water treatment device with fill-counting cartridge - Google Patents

Water treatment device with fill-counting cartridge Download PDF

Info

Publication number
WO1997041066A2
WO1997041066A2 PCT/US1997/005851 US9705851W WO9741066A2 WO 1997041066 A2 WO1997041066 A2 WO 1997041066A2 US 9705851 W US9705851 W US 9705851W WO 9741066 A2 WO9741066 A2 WO 9741066A2
Authority
WO
WIPO (PCT)
Prior art keywords
filter cartridge
float
water treatment
life
escapement
Prior art date
Application number
PCT/US1997/005851
Other languages
French (fr)
Other versions
WO1997041066A3 (en
Inventor
John D. Tanner
David J. Emmons
Erik G. Orwoll
Original Assignee
Recovery Engineering, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Recovery Engineering, Inc. filed Critical Recovery Engineering, Inc.
Priority to KR10-1998-0708718A priority Critical patent/KR100463005B1/en
Priority to BR9709441-2A priority patent/BR9709441A/en
Priority to EP97920245A priority patent/EP0900174B1/en
Priority to DE69738959T priority patent/DE69738959D1/en
Priority to JP9538907A priority patent/JP2000508972A/en
Priority to CA002253248A priority patent/CA2253248C/en
Publication of WO1997041066A2 publication Critical patent/WO1997041066A2/en
Publication of WO1997041066A3 publication Critical patent/WO1997041066A3/en
Priority to HK99103893A priority patent/HK1018769A1/en

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
    • C02F1/003—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
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/006—Cartridges
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/44—Time
    • C02F2209/445—Filter life
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/04—Location of water treatment or water treatment device as part of a pitcher or jug

Definitions

  • This invention relates to water treatment devices, such as gravity-fed devices, and to filter cartridges used in such devices.
  • this invention relates to a fill-counting cartridge and a cartridge assembly which removes water treatment particles from the treated water.
  • Domestic water treatment devices are known in the art. They include in-line devices (e.g., under the sink) , terminal end devices (e.g., counter top or faucet mounted) , and 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 . Batch water treatment systems can also be incorporated into other devices, such as a coffee maker. 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.
  • Mechanical filters which treat water by preventing particulates from passing through them, provide a ready end-of-life indication through reduced flow due to particulate accumulation.
  • Chemical removal media e.g., charcoal based media and ion exchange media
  • processes such as adsorption and ion exchange for treating water. These processes do not reduce flow or provide other end-of-life indication.
  • Certain aspects of this invention involve a filter cartridge end-of-life mechanism for a gravity-fed water treatment device.
  • a carafe is shown herein, it will be understood that the invention could be employed in a variety of other gravity-fed devices, such as in a larger reservoir having a pour spigot or in a coffee machine.
  • the end-of- life mechanism comprises a float which rises when the water treatment device is filled, and falls after the water has been treated.
  • a counting mechanism counts the number of times the water treatment device has been filled.
  • the mechanism includes an escapement mechanism wherein the float is advanced along an escapement path each time the float rises and falls.
  • the end- of-life mechanism comprises a mechanism for counting the number of times the water treatment device has been filled.
  • the fill-counting mechanism includes a member which is moved by the water.
  • a visual indicating mechanism cooperates with the fill-counting mechanism to provide a continuous visual indication of the amount of useful life remaining in the filter cartridge.
  • the invention comprises a filter cartridge assembly which reduces water treatment particles in the treated water.
  • a gravity-fed system is disclosed herein, the invention could also be employed in systems where the water is forced through the media by other than gravity.
  • the invention comprises a filter cartridge assembly for a water treatment device.
  • the assembly includes a filter cartridge containing water treatment material and having an upper inlet end and a lower outlet end.
  • a tray is positioned beneath the lower outlet end. It is detachably connected to the filter cartridge and separable from the water treatment device.
  • the tray is constructed and arranged so that treated water flowing from the outlet end flows generally toward the inlet end and out of the tray. The tray holds particles of water treatment material coming from the outlet end, thereby making the treated water flowing out of the tray substantially free of the particles.
  • Figure 1 is an exploded perspective view of a water treatment device according to the present invention
  • Figure 2 is a cross-sectional view of a filter cartridge, including an end-of-life mechanism, according to the present invention
  • Figure 3 is a schematic diagram of an escapement path according to the present invention.
  • Figure 4 is a top view of the filter cartridge end-of-life mechanism shown in Figure 2, taken generally along line 4-4 of Figure 2;
  • Figure 5 shows a cross-sectional view of a filter cartridge assembly according to the present invention.
  • filter cartridge 10 described herein can be used in a variety of gravity-fed water treatment devices.
  • Filter cartridge 10 is shown herein in a carafe 100 by way of illustration.
  • cartridge 10 includes mechanism 20 which counts the number of times that the water treatment device has been filled. While fill-counting mechanism 20 is shown incorporated in filter cartridge 10, it could also be employed separately from a filter cartridge and therefore reused.
  • Fill-counting mechanism 20 includes float 25 which is advanced along an escapement path each time the water treatment device is filled.
  • Float 25 includes a plurality of downwardly extending annular walls 26 which form channels 27 beneath float 25. Channels 27 trap air so as to cause float 25 to rise when it is submerged.
  • An "escapement” is a mechanism by which a member is advanced along a path (usually circular) through a repeated movement between two discreet stopped positions.
  • An example of an escapement path can be found in a pendular clock. Escapement paths other than that described herein could be used within the principles of the invention.
  • the escapement path could be linear instead of circular.
  • the member moving between two discreet positions need not be the same member which is advanced along the escapement path.
  • the shape of the escapement path could also be different from the saw-toothed path described herein.
  • the preferred escapement path 30 comprises upper 33 and lower 37 paths formed in upper 32 and lower 36 escapements, respectively. As best shown in Figure 3, upper 33 and lower 37 paths are generally saw toothed and offset from one another.
  • Float 25 advances along escapement path 30 as follows.
  • pin 29 the preferred float includes a plurality of pins
  • first tooth 38 of lower path 37 position A
  • first tooth 34 of upper path 33 position B
  • Pin then travels along first tooth 34 from position B to C as float 25 rises further.
  • pin 29 drops to second tooth 39 of lower path 37 (position D) and further to position E.
  • Fill-counting mechanism 20 provides a continuous visual indication of the amount of useful life remaining in filter cartridge 10 as follows.
  • gear 24 on float 25 engages planetary gear 22 which is advanced in a circular path along teeth 31 of upper escapement 32 as float 25 rotates.
  • Planetary gear 22 includes stem 23 which is visible through one or more openings 41 in cover 40. Planetary gear 22 travels clockwise (see arrow in Figure 4) until it reaches stop 35 in upper escapement 32. Appropriate indications are provided on cover 40 to tell the user when for example one-half of the cartridge life is remaining and when it has reached end of life.
  • the mechanism could employ a member moved by the water, such as a paddle wheel, which is not a float.
  • An indicating member could be connected to the member which is moved by the water in various ways.
  • the mechanism also need not involve an escapement path.
  • the water proceeds from float chamber 21 through slots 46 at bottom of lower escapement to media 12. Water also directly enters media 12 through slots 44, which are provided in the lower portion of lower escapement 36 so that substantially all of the water in the upper chamber of the water treatment device enters filter cartridge 10. Treated water then exits filter cartridge 10 from slots 15 in the bottom of housing 14.
  • a filter cartridge assembly 50 according to the present invention will now be described with reference to Figures 1 and 5. It will be understood that although assembly 50 is shown incorporated in a carafe 100, it could also be employed in a variety of other water treatment devices within the principles of the invention.
  • Filter cartridge assembly 50 is shown in Figure 1 in carafe 100.
  • Carafe 100 includes funnel 105 forming an upper chamber for contaminated water and a pitcher 102 forming a lower chamber for treated water.
  • Pitcher 102 includes handle 103 and pour spout 104.
  • funnel 105 is inserted into pitcher 102 and cover 101 is placed on top.
  • the preferred filter cartridge assembly 50 is shown in Figure 5.
  • Assembly 50 includes filter cartridge 10 and cup 55 releasably attached to cartridge 10 by three inwardly facing protrusions 56, spaced at 120° intervals, which snap fit into corresponding detent 16 in cartridge 10.
  • Cartridge 10 is sealed to downwardly extending sealing surface 106 of funnel 105 by an appropriately elastic sealing lip 17 around the perimeter of the upper end of housing 14.
  • Channel 54 of cup 55 is received in recess 13 in filter housing 14.
  • Key 107 which in turn fits into channel 54 of cup 55, is for the purpose of properly aligning cup 55 and cartridge 10 relative to funnel 105.
  • Cup 55 is constructed and arranged to prevent particles of water treatment media 12 from entering the lower chamber (here, pitcher 102) of the water treatment device. This is particularly a concern in gravity-fed devices, where loose media particles such as granular activated carbon and ion exchange resins are employed.
  • Contaminated water entering upper inlet end 18 expels media particles 12 from lower outlet end 19 and into bottom 59 of cup 55.
  • the particles are held in bottom 59 of cup 55 as treated water passes upwardly.
  • Treated water flows out of cup 50 through gap 51 between inside wall 52 and outside wall 53, which acts as a deflector plate to direct the treated water downwardly.
  • Notch 58 assists this flow by reducing the surface tension of the water with the underside of bottom 59 of cup 50.
  • gap 51 is preferably located on the same side as handle 103 to keep particles from coming out of cup 55 when pouring.
  • cup 55 acts as a tray which prevents media particles from entering pitcher 102.
  • cup 55 can be removed, rinsed, and reattached to the next filter cartridge.
  • Cup 55 could be constructed in a variety of other ways within the principles of the invention to beneficially reduce the amount of media particles in the treated water.

Abstract

A filter cartridge end-of-life mechanism and a filter cartridge assembly for a water treatment device. The end-of-life mechanism comprises a float which is moved along an escapement path each time the device is filled. A counting mechanism connected to the float provides a continuous visual indication of the amount of useful life remaining in the filter cartridge. The cartridge assembly includes a tray detachably connected to a filter cartridge. The tray is positioned beneath the outlet end of the cartridge to remove water treatment particles from the treated water.

Description

WATER TREATMENT DEVICE WITH FILL-COUNTING CARTRIDGE
Field of the Invention
This invention relates to water treatment devices, such as gravity-fed devices, and to filter cartridges used in such devices. In particular, this invention relates to a fill-counting cartridge and a cartridge assembly which removes water treatment particles from the treated water.
Background of the Invention Domestic water treatment devices are known in the art. They include in-line devices (e.g., under the sink) , terminal end devices (e.g., counter top or faucet mounted) , and 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 . Batch water treatment systems can also be incorporated into other devices, such as a coffee maker. 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.
Mechanical filters, which treat water by preventing particulates from passing through them, provide a ready end-of-life indication through reduced flow due to particulate accumulation. Chemical removal media (e.g., charcoal based media and ion exchange media) employ processes such as adsorption and ion exchange for treating water. These processes do not reduce flow or provide other end-of-life indication.
Various approaches have been taken to provide end-of-life indication where it is not inherently provided by the media. It is known for example to "totalize," mechanically or electronically, the volume of water that has been treated. The mechanical approach typically involves a turbine and gear reduction mechanism. The electronic approach typically involves a pressure transducer and a microprocessor which integrates to calculate volume. Such systems are relatively expensive, however, and do not lend themselves well to batch treatment devices.
In batch treatment systems, it is known to approximate the amount of water that has been treated by counting the number of times the device has been filled. Such a prior art device is described in U.S. Patent Application No. 08/341,420, filed November 17, 1994, which is expected to issue as a U.S. Patent shortly. The x341 fill-counting system employs a float which rotates one revolution on a threaded rod each time the device is filled. One short-coming of this approach is that there is no continuous visual indication of the amount of useful life remaining, but only an indication at the end of life.
Where relatively loose particle media are employed, such as the loose granular activated carbon and resins typically used in batch systems, media particles tend to come out of the cartridge with the treated water. Although ingesting these particles is generally not a significant health concern, consumers consider it undesirable to see what appears to be sediment in the treated water. An example of a gravity- fed system where this is a shortcoming is shown in U.S. Patent No. 4,969,996.
What has been needed is a novel fill-counting mechanism which provides a continuous visual indication of the amount of useful life remaining in the filter cartridge. What has also been needed is a novel filter cartridge assembly which reduces the number of media particles in the treated water.
Summary of the Invention
Certain aspects of this invention involve a filter cartridge end-of-life mechanism for a gravity-fed water treatment device. Although a carafe is shown herein, it will be understood that the invention could be employed in a variety of other gravity-fed devices, such as in a larger reservoir having a pour spigot or in a coffee machine.
In one aspect of the invention, the end-of- life mechanism comprises a float which rises when the water treatment device is filled, and falls after the water has been treated. A counting mechanism counts the number of times the water treatment device has been filled. The mechanism includes an escapement mechanism wherein the float is advanced along an escapement path each time the float rises and falls.
In another aspect of the invention, the end- of-life mechanism comprises a mechanism for counting the number of times the water treatment device has been filled. The fill-counting mechanism includes a member which is moved by the water. A visual indicating mechanism cooperates with the fill-counting mechanism to provide a continuous visual indication of the amount of useful life remaining in the filter cartridge.
In certain other aspects of the invention, the invention comprises a filter cartridge assembly which reduces water treatment particles in the treated water. Although a gravity-fed system is disclosed herein, the invention could also be employed in systems where the water is forced through the media by other than gravity.
In another aspect of the invention, the invention comprises a filter cartridge assembly for a water treatment device. The assembly includes a filter cartridge containing water treatment material and having an upper inlet end and a lower outlet end. A tray is positioned beneath the lower outlet end. It is detachably connected to the filter cartridge and separable from the water treatment device. The tray is constructed and arranged so that treated water flowing from the outlet end flows generally toward the inlet end and out of the tray. The tray holds particles of water treatment material coming from the outlet end, thereby making the treated water flowing out of the tray substantially free of the particles.
Brief Description of the Drawings
A preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein like reference numerals identify corresponding parts : Figure 1 is an exploded perspective view of a water treatment device according to the present invention;
Figure 2 is a cross-sectional view of a filter cartridge, including an end-of-life mechanism, according to the present invention;
Figure 3 is a schematic diagram of an escapement path according to the present invention;
Figure 4 is a top view of the filter cartridge end-of-life mechanism shown in Figure 2, taken generally along line 4-4 of Figure 2; and
Figure 5 shows a cross-sectional view of a filter cartridge assembly according to the present invention.
Detailed Description of the Preferred Embodiment
The filter cartridge 10 described herein can be used in a variety of gravity-fed water treatment devices. Filter cartridge 10 is shown herein in a carafe 100 by way of illustration. Referring to Figure 2, cartridge 10 includes mechanism 20 which counts the number of times that the water treatment device has been filled. While fill-counting mechanism 20 is shown incorporated in filter cartridge 10, it could also be employed separately from a filter cartridge and therefore reused.
Fill-counting mechanism 20 includes float 25 which is advanced along an escapement path each time the water treatment device is filled. Float 25 includes a plurality of downwardly extending annular walls 26 which form channels 27 beneath float 25. Channels 27 trap air so as to cause float 25 to rise when it is submerged. An "escapement" is a mechanism by which a member is advanced along a path (usually circular) through a repeated movement between two discreet stopped positions. An example of an escapement path can be found in a pendular clock. Escapement paths other than that described herein could be used within the principles of the invention. For example, the escapement path could be linear instead of circular. Also, as with the pendulum of a clock, the member moving between two discreet positions need not be the same member which is advanced along the escapement path. The shape of the escapement path could also be different from the saw-toothed path described herein.
The preferred escapement path 30 comprises upper 33 and lower 37 paths formed in upper 32 and lower 36 escapements, respectively. As best shown in Figure 3, upper 33 and lower 37 paths are generally saw toothed and offset from one another.
Float 25 advances along escapement path 30 as follows. Referring to Figures 2 and 3, as float 25 rises along center post 28, pin 29 (the preferred float includes a plurality of pins) is raised from first tooth 38 of lower path 37 (position A) to first tooth 34 of upper path 33 (position B) . Pin then travels along first tooth 34 from position B to C as float 25 rises further. When float falls, pin 29 drops to second tooth 39 of lower path 37 (position D) and further to position E. Thus, each time float 25 rises and falls, it is advanced one tooth along escapement path 30.
Fill-counting mechanism 20 provides a continuous visual indication of the amount of useful life remaining in filter cartridge 10 as follows. Referring to Figures 2 and 4, gear 24 on float 25 engages planetary gear 22 which is advanced in a circular path along teeth 31 of upper escapement 32 as float 25 rotates. Planetary gear 22 includes stem 23 which is visible through one or more openings 41 in cover 40. Planetary gear 22 travels clockwise (see arrow in Figure 4) until it reaches stop 35 in upper escapement 32. Appropriate indications are provided on cover 40 to tell the user when for example one-half of the cartridge life is remaining and when it has reached end of life.
A variety of continuous visual indicating mechanisms other than that disclosed herein could be employed within the principles of the invention. For example, the mechanism could employ a member moved by the water, such as a paddle wheel, which is not a float. An indicating member could be connected to the member which is moved by the water in various ways. The mechanism also need not involve an escapement path.
Water flows through filter cartridge 10 as follows. Water enters through openings 41, 43 in cover 40 and lower escapement 36, respectively and through circular inlet holes 42 in upper escapement 32 to fill float chamber 21. Downwardly protruding ribs 45 are provided on upper escapement 36 in order to break the surface tension between upper escapement 32 and float 25 when the water level drops, thereby assuring that float 25 will fall. The water proceeds from float chamber 21 through slots 46 at bottom of lower escapement to media 12. Water also directly enters media 12 through slots 44, which are provided in the lower portion of lower escapement 36 so that substantially all of the water in the upper chamber of the water treatment device enters filter cartridge 10. Treated water then exits filter cartridge 10 from slots 15 in the bottom of housing 14.
A filter cartridge assembly 50 according to the present invention will now be described with reference to Figures 1 and 5. It will be understood that although assembly 50 is shown incorporated in a carafe 100, it could also be employed in a variety of other water treatment devices within the principles of the invention.
Filter cartridge assembly 50 is shown in Figure 1 in carafe 100. Carafe 100 includes funnel 105 forming an upper chamber for contaminated water and a pitcher 102 forming a lower chamber for treated water. Pitcher 102 includes handle 103 and pour spout 104. When carafe 100 is assembled, funnel 105 is inserted into pitcher 102 and cover 101 is placed on top. The preferred filter cartridge assembly 50 is shown in Figure 5. Assembly 50 includes filter cartridge 10 and cup 55 releasably attached to cartridge 10 by three inwardly facing protrusions 56, spaced at 120° intervals, which snap fit into corresponding detent 16 in cartridge 10. Cartridge 10 is sealed to downwardly extending sealing surface 106 of funnel 105 by an appropriately elastic sealing lip 17 around the perimeter of the upper end of housing 14. Channel 54 of cup 55 is received in recess 13 in filter housing 14. Key 107, which in turn fits into channel 54 of cup 55, is for the purpose of properly aligning cup 55 and cartridge 10 relative to funnel 105.
Cup 55 is constructed and arranged to prevent particles of water treatment media 12 from entering the lower chamber (here, pitcher 102) of the water treatment device. This is particularly a concern in gravity-fed devices, where loose media particles such as granular activated carbon and ion exchange resins are employed. Contaminated water entering upper inlet end 18 expels media particles 12 from lower outlet end 19 and into bottom 59 of cup 55. The particles are held in bottom 59 of cup 55 as treated water passes upwardly. Treated water flows out of cup 50 through gap 51 between inside wall 52 and outside wall 53, which acts as a deflector plate to direct the treated water downwardly. Notch 58 assists this flow by reducing the surface tension of the water with the underside of bottom 59 of cup 50. Where the water treatment device is a pitcher 102, gap 51 is preferably located on the same side as handle 103 to keep particles from coming out of cup 55 when pouring.
In this way, cup 55 acts as a tray which prevents media particles from entering pitcher 102. When it is time to replace filter cartridge 10, cup 55 can be removed, rinsed, and reattached to the next filter cartridge. Cup 55 could be constructed in a variety of other ways within the principles of the invention to beneficially reduce the amount of media particles in the treated water.
It should be understood that the present invention is not limited to the preferred embodiment discussed above, which is illustrative only. Changes may be made in detail, especially matters of shape, size, arrangement of parts, or material 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

WE CLAIM :
1. A filter cartridge end-of-life mechanism for a gravity-fed water treatment device, comprising: a float which rises when the water treatment device is filled, and falls after the water has been treated; and means for counting the number of times the water treatment device has been filled, including an escapement mechanism wherein said float is advanced along an escapement path each time said float rises and falls.
2. A filter cartridge end-of-life mechanism according to claim 1, wherein said float rotates about a center along a generally circular escapement path.
3. A filter cartridge end-of-life mechanism according to claim 1, wherein said escapement path includes upper and lower generally sawtoothed paths which are offset from one another, such that, when said float rises it is raised from a first tooth of said lower escapement path and travels along a first tooth of said upper escapement path, and when said float falls it engages a second tooth of said lower escapement path, thereby advancing said float.
4. A filter cartridge end-of-life mechanism according to claim 1, wherein said float includes at least one protrusion extending therefrom to engage said escapement path.
5. A filter cartridge end-of-life mechanism according to claim 1, further including means for providing a visual indication of when the filter cartridge has reached the end of its useful life.
6. A filter cartridge end-of-life mechanism according to claim 1, further including means for providing a continuous visual indication of the amount of useful life remaining in the filter cartridge.
7. A filter cartridge end-of-life mechanism according to claim 6, wherein said continuous visual indicating means comprise an indicating member advanced by said float as said float is advanced along said escapement path.
8. A filter cartridge end-of-life mechanism according to claim 7, wherein said indicating member is a gear which engages corresponding teeth on said float, such that, as said float rotates along said escapement path, said float advances said indicating gear in a generally circular path, a portion of said indicating gear being visible to provide a continuous visual indication of the amount of useful life remaining in the filter cartridge.
9. A filter cartridge end-of-life mechanism according to claim 1, wherein said end-of-life mechanism is incorporated into the filter cartridge.
10. A filter cartridge end-of-life mechanism for a gravity-fed water treatment device, comprising: means for counting the number of times the water treatment device has been filled, including a member moved by the water; and means, in cooperation with said fill-counting means, for providing a continuous visual indication of the amount of useful life remaining in the filter cartridge.
11. A filter cartridge end-of-life mechanism according to claim 10, wherein said member is a float.
12. A filter cartridge end-of-life mechanism according to claim 11, wherein said fill-counting means comprise an escapement mechanism wherein said float is advanced along an escapement path.
13. A filter cartridge end-of-life mechanism according to claim 12, wherein said continuous visual indicating means comprise an indicating member advanced by said float as said float is advanced along said escapement path.
14. A filter cartridge end-of-life mechanism according to claim 10, wherein said end-of-life mechanism is incorporated into the filter cartridge.
15. A filter cartridge assembly for a water treatment device, comprising: a filter cartridge containing water treatment material and having an upper inlet end and a lower outlet end; and a tray positioned beneath said outlet end, detachably connected to said filter cartridge and separable from the water treatment device, said tray being constructed and arranged such that treated water flowing from said outlet end flows generally toward said inlet end and out of said tray.
16. The filter cartridge assembly of claim 15, wherein said tray is shaped generally as a cup which extends substantially to said upper inlet end.
17. The filter cartridge assembly of claim 15, wherein the tray includes an outside wall extending downwardly to form a deflector plate and an inside wall extending upwardly past a bottom end of said inside wall, such that the treated water flows out of said tray through a gap between said inside and outside walls.
18. The filter cartridge assembly of claim 15, wherein said tray includes a notch extending upwardly from a bottom of said tray to reduce the surface tension of the treated water on an underside of said bottom.
19. The filter cartridge assembly of claim 15, wherein said tray is connected to said filter cartridge proximate an upper end of said tray.
20. The filter cartridge assembly of claim 15, wherein said filter cartridge assembly is constructed and arranged for use in and is incorporated in a gravity-fed water treatment device.
PCT/US1997/005851 1996-04-30 1997-04-10 Water treatment device with fill-counting cartridge WO1997041066A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
KR10-1998-0708718A KR100463005B1 (en) 1996-04-30 1997-04-10 Water treatment device with fill-counting cartridge
BR9709441-2A BR9709441A (en) 1996-04-30 1997-04-10 "water treatment device with filling count cartridge"
EP97920245A EP0900174B1 (en) 1996-04-30 1997-04-10 Water treatment device with fill-counting cartridge
DE69738959T DE69738959D1 (en) 1996-04-30 1997-04-10 WATER TREATMENT DEVICE WITH A CARTRIDGE FOR DETECTING THE NUMBER OF FILLING PROCESSES
JP9538907A JP2000508972A (en) 1996-04-30 1997-04-10 Water treatment device with fill count cartridge
CA002253248A CA2253248C (en) 1996-04-30 1997-04-10 Water treatment device with fill-counting cartridge
HK99103893A HK1018769A1 (en) 1996-04-30 1999-09-08 Water treatment device with fill-counting cartridge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/640,205 US5882507A (en) 1996-04-30 1996-04-30 Water filter cartridge end-of-life mechanism
US08/640,205 1996-04-30

Publications (2)

Publication Number Publication Date
WO1997041066A2 true WO1997041066A2 (en) 1997-11-06
WO1997041066A3 WO1997041066A3 (en) 1998-03-12

Family

ID=24567296

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/005851 WO1997041066A2 (en) 1996-04-30 1997-04-10 Water treatment device with fill-counting cartridge

Country Status (12)

Country Link
US (4) US5882507A (en)
EP (1) EP0900174B1 (en)
JP (1) JP2000508972A (en)
KR (1) KR100463005B1 (en)
CN (1) CN1101784C (en)
BR (1) BR9709441A (en)
CA (1) CA2253248C (en)
DE (1) DE69738959D1 (en)
HK (1) HK1018769A1 (en)
RU (1) RU2185330C2 (en)
TW (1) TW337493B (en)
WO (1) WO1997041066A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003028848A1 (en) * 2001-10-02 2003-04-10 Struttura S.R.L. A water-purification jug, for domestic use
EP2130799A1 (en) * 2008-05-27 2009-12-09 Laica S.p.A. A replaceable cartridge type filter for filtering systems and a filtering system incorporating the filter.
EP2436431A3 (en) * 2002-08-07 2012-07-11 Strix Limited Water treatment apparatus

Families Citing this family (104)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882507A (en) * 1996-04-30 1999-03-16 Recovery Engineering, Inc. Water filter cartridge end-of-life mechanism
CA2315777C (en) 1998-01-16 2008-12-23 1263152 Ontario Inc. Indicating device for use with a dispensing device
US6042725A (en) * 1998-04-20 2000-03-28 Matscorp Ltd. Water filter cartridge
US6729330B2 (en) 1998-05-05 2004-05-04 Trudell Medical International Indicating device for aerosol container
US6082358A (en) 1998-05-05 2000-07-04 1263152 Ontario Inc. Indicating device for aerosol container
US6336453B1 (en) 1999-04-30 2002-01-08 Trudell Medical International Indicating device for aerosol container
US6287456B1 (en) * 1998-10-30 2001-09-11 Kimberly-Clark Worldwide, Inc. Filtration system with filtrate volume indicator
TR200103305T2 (en) * 1999-05-20 2002-05-21 The Procter & Gamble Company Method for removing nano-sized pathogens from liquids.
USD450531S1 (en) 1999-06-29 2001-11-20 Kimberly-Clark Worldwide, Inc. Carafe for filtered water
USD444987S1 (en) 1999-06-29 2001-07-17 Kimberly-Clark Worldwide, Inc. Filtered water carafe
AU7340100A (en) * 1999-08-31 2001-03-26 Kimberly-Clark Worldwide, Inc. Portable purification system
IL132316A0 (en) * 1999-10-11 2001-03-19 Fitoussi Mayer Water purification device
USD444662S1 (en) 1999-11-09 2001-07-10 Kimberly-Clark Worldwide, Inc. Filtered water pitcher
FR2806897B1 (en) * 2000-03-29 2003-05-30 Moulinex Sa HOUSEHOLD APPLIANCE COMPRISING A REMOVABLE WATER TREATMENT CARTRIDGE
CN1262482C (en) * 2000-12-25 2006-07-05 三菱丽阳株式会社 Pitcher type water purifier and purification cartridge for water purifier
US6745760B2 (en) 2001-05-15 2004-06-08 Trudell Medical International Medicament applicator
US20030034283A1 (en) * 2001-08-17 2003-02-20 Tsataros Eddie J. Fluid treatment device and counter mechanism
US7614508B2 (en) * 2001-08-23 2009-11-10 Pur Water Purification Products Inc. Water filter materials, water filters and kits containing silver coated particles and processes for using the same
KR100777951B1 (en) * 2001-08-23 2007-11-28 더 프록터 앤드 갬블 캄파니 Water filter materials, corresponding water filters and processes for using the same
US20030217967A1 (en) * 2001-08-23 2003-11-27 The Procter & Gamble Company Processes for manufacturing water filter materials and water filters
US7615152B2 (en) 2001-08-23 2009-11-10 Pur Water Purification Products, Inc. Water filter device
US20050279696A1 (en) * 2001-08-23 2005-12-22 Bahm Jeannine R Water filter materials and water filters containing a mixture of microporous and mesoporous carbon particles
US7614507B2 (en) 2001-08-23 2009-11-10 Pur Water Purification Products Inc. Water filter materials, water filters and kits containing particles coated with cationic polymer and processes for using the same
US7004164B2 (en) * 2002-03-21 2006-02-28 Trudell Medical International Indicating device for aerosol container
US6786136B2 (en) * 2002-06-25 2004-09-07 Unilever Bestfoods, North America, Division Of Conopco, Inc. Apparatus for preventing passing off of a brewed beverage
US7227714B2 (en) * 2003-07-22 2007-06-05 Matsushita Electric Industrial Co., Ltd. Methods for conditional servowriting
US7807606B2 (en) * 2003-09-04 2010-10-05 Battelle Energy Alliance, Llc High capacity adsorption media and method of producing
US7368412B2 (en) * 2003-09-04 2008-05-06 Battelle Energy Alliance, Llc High capacity adsorption media and method of producing
WO2005030634A2 (en) * 2003-09-05 2005-04-07 Gary Errol Flax Bottled water cooler and dispenser with filter
US7441665B2 (en) * 2003-10-01 2008-10-28 Halosource, Inc. Water purification cartridge
US7621273B2 (en) * 2003-10-28 2009-11-24 Trudell Medical International Indicating device with warning dosage indicator
US7438799B2 (en) * 2003-12-03 2008-10-21 Headwaters R & D, Inc. Portable, refillable water dispenser serving batches of water purified of organic and inorganic pollutants
US7100530B2 (en) 2003-12-15 2006-09-05 Trudell Medical International, Inc. Dose indicating device
US7713482B2 (en) 2003-12-18 2010-05-11 The Clorox Company Control scheme for enhanced filtered water systems
US7378015B2 (en) * 2003-12-18 2008-05-27 The Clorox Company Filtered water enhancements
CN1918073B (en) * 2004-02-13 2011-06-15 Pur水纯化产品公司 Water treatment cartridge shutoff
ITPD20040095A1 (en) * 2004-04-08 2004-07-08 Laica Srl REPLACEABLE CARTRIDGE FILTER CARAFE
US7487677B2 (en) * 2004-04-19 2009-02-10 Fook Tin Technologies Ltd. Apparatus and methods for monitoring water consumption and filter usage
US7107838B2 (en) * 2004-04-19 2006-09-19 Fook Tin Technologies Ltd. Apparatus and methods for monitoring water consumption and filter usage
US7316323B2 (en) * 2004-05-06 2008-01-08 The Procter & Gamble Company Filters having improved permeability and virus removal capabilities
US8893927B2 (en) 2004-05-24 2014-11-25 Pur Water Purification Products, Inc. Cartridge for an additive dispensing system
US20050258082A1 (en) * 2004-05-24 2005-11-24 Lund Mark T Additive dispensing system and water filtration system
US8556127B2 (en) 2004-05-24 2013-10-15 Pur Water Purification Products, Inc. Additive dispensing system for a refrigerator
US7670479B2 (en) * 2004-05-24 2010-03-02 PUR Water Purification, Inc. Fluid container having an additive dispensing system
DE102004026167A1 (en) * 2004-05-28 2005-12-22 Brita Gmbh Filter cartridge and device for the filtration of liquids
DE102004026166B3 (en) * 2004-05-28 2006-02-09 Brita Gmbh Filter cartridge and device for the filtration of liquids
US7543582B2 (en) 2004-09-20 2009-06-09 Trudell Medical International Dose indicating device with display elements attached to container
JP5189369B2 (en) * 2005-01-20 2013-04-24 トルーデル メディカル インターナショナル Dispensing device
US7513278B2 (en) * 2005-01-21 2009-04-07 Tersano Inc. Drinking water pitcher having a removable upper reservoir
US20060175317A1 (en) * 2005-02-09 2006-08-10 Senno Technology Inc. Lifespan monitoring apparatus and method for a filter of an unboiled water pitcher
US20060226064A1 (en) * 2005-03-23 2006-10-12 Beckman Robert C Multiple cartridge carafe filtration
AU2006232547A1 (en) * 2005-04-01 2006-10-12 Applica Consumer Products, Inc. Water filtration system with improved performance
JP2008542005A (en) * 2005-05-25 2008-11-27 ライカ・エス・ピー・エー Filtration equipment for filtering water and liquids in general
US20060273000A1 (en) * 2005-06-07 2006-12-07 Chung Liao I Portable water filtering device
US7537695B2 (en) * 2005-10-07 2009-05-26 Pur Water Purification Products, Inc. Water filter incorporating activated carbon particles with surface-grown carbon nanofilaments
WO2007067179A1 (en) * 2005-12-09 2007-06-14 Yakima Filters, Inc. Container having fluid purification system
LT2251305T (en) * 2005-12-23 2018-04-10 Laica S.P.A. Filter cartridge for jugs
US7987770B2 (en) * 2005-12-30 2011-08-02 General Electric Company Water pitcher and cover therefore
CA2645158A1 (en) * 2006-03-09 2007-11-22 Fka Distributing Co. D/B/A Homedics, Inc. Water purifier
US8141550B2 (en) 2006-08-01 2012-03-27 Trudell Medical International Dispensing device
MX2009003790A (en) * 2006-10-08 2011-03-03 Fluid filter monitoring device.
PL2173665T3 (en) * 2007-07-31 2013-06-28 Laica Spa Percolation filtering system
US20090057241A1 (en) * 2007-08-29 2009-03-05 Phillip Nauta Filter assembly
US8043502B2 (en) * 2007-08-29 2011-10-25 Uv Corporation Water pitcher filter
MD3805C2 (en) * 2007-12-26 2009-08-31 ШКИЛЁВ Думитру Владимир Water-purifying filter
US8082873B2 (en) * 2008-05-05 2011-12-27 Trudell Medical International Drive mechanism for an indicating device
US8181591B1 (en) 2008-05-23 2012-05-22 Trudell Medical International Domed actuator for indicating device
EP2128515A1 (en) * 2008-05-30 2009-12-02 Koninklijke Philips Electronics N.V. A water appliance having a flow control unit and a filter assembly
DE102008002727B4 (en) * 2008-06-27 2020-12-17 Brita Gmbh Device for treating water, in particular a filter device, and cartridge
US8940163B2 (en) * 2008-07-21 2015-01-27 3M Innovative Properties Company Apparatus for dispersing additive into a fluid stream
EP2626098B1 (en) 2008-10-22 2020-08-19 Trudell Medical International Modular aerosol delivery system
US8177966B2 (en) * 2009-02-25 2012-05-15 Mr. Chiaphua Industries Limited UV liquid storage and dispensing device
US8128820B2 (en) * 2009-02-25 2012-03-06 Mr. Chiaphua Industries Limited UV liquid storage and dispensing device
WO2011013142A2 (en) * 2009-07-28 2011-02-03 Tata Chemicals Ltd. End of life system for a water filter
SG10201403779RA (en) 2009-09-09 2014-10-30 Strauss Water Ltd Liquid filter device
CA2784325C (en) * 2009-12-14 2018-02-20 Pur Water Purification Products, Inc. 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
US8961781B2 (en) 2011-09-29 2015-02-24 Brita Lp Filter status techniques adapted for use with a container based filtration device
EP2791061B1 (en) 2011-12-16 2022-06-15 Helen of Troy Limited Gravity filter
US9750834B1 (en) 2011-12-29 2017-09-05 Crosstex International, Inc. Water treatment dispensing apparatus
US10669163B2 (en) 2012-10-24 2020-06-02 Paragon Water Systems Universal filter cartridge
RU2527854C2 (en) * 2012-11-30 2014-09-10 Государственное бюджетное образовательное учреждение высшего прфессионального образования "Кировская государственная медицинская академия" Министерства здравоохранения Российской Федерации (ГБОУ ВПО Кировская ГМА Минздрава России) Vokhmyaninovтs method of service life determination for independent devices for treatment of water fed by gravity (versions)
US20140263014A1 (en) * 2013-03-15 2014-09-18 Revelations Water Technologies Holding Company, Inc. Water Filtration Device
IN2013MU01368A (en) * 2013-04-12 2015-04-10 Tata Chemicals Ltd
US20170215611A1 (en) * 2013-08-06 2017-08-03 Brita Lp Intermediate adapter for filter seating
US9737834B1 (en) 2014-05-21 2017-08-22 TST Water, INC. Water filter cartridge with slanted nozzles
BR112016030933B1 (en) * 2014-08-29 2022-07-19 Kx Technologies Llc FILTER CARTRIDGE AND METHOD TO ELIMINATE AIR BLOCK
TWI551337B (en) * 2014-12-30 2016-10-01 Solution purification filter
ES2807275T3 (en) 2015-03-23 2021-02-22 Strauss Water Ltd Water filter and assembly of the same
US9452373B1 (en) 2015-04-29 2016-09-27 Rocker Scientific Co., Ltd. Filter funnel for connection to flask
USD775711S1 (en) 2015-05-13 2017-01-03 Helen Of Troy Limited Water filter pitcher
USD774622S1 (en) 2015-05-13 2016-12-20 Helen Of Troy Limited Water filter pitcher
USD773013S1 (en) 2015-05-13 2016-11-29 Helen Of Troy Limited Water filter pitcher
USD770010S1 (en) 2015-05-13 2016-10-25 Helen Of Troy Limited Water filter pitcher
US20180008916A1 (en) * 2016-07-07 2018-01-11 Haier Us Appliance Solutions, Inc. Performance indication device for a filter
USD858690S1 (en) 2017-10-24 2019-09-03 Crosstex International, Inc. Water treatment cartridge
CA3079417A1 (en) 2017-10-24 2019-05-02 Crosstex International, Inc. Water treatment dispensing apparatus
USD846069S1 (en) * 2017-11-09 2019-04-16 Qingdao Ecopure Filter Co., Ltd. Water filter
US11872506B2 (en) * 2018-07-07 2024-01-16 Paragon Water Systems, Inc. Water filter cartridge having an air vent
US11484386B2 (en) 2018-08-30 2022-11-01 Crosstex International, Inc. Dental instrument water supply filter
RU188338U1 (en) * 2018-10-10 2019-04-08 Павел Павлович Горелов Device for electrochemical activation of water
USD1016969S1 (en) 2019-04-24 2024-03-05 Helen Of Troy Limited Filter cartridge
EP3838848A1 (en) 2019-12-17 2021-06-23 Koninklijke Philips N.V. Device comprising filter with-end-of life mechanism
EP3907188A1 (en) 2020-05-08 2021-11-10 Brita GmbH Drainage plate for fluids

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197647A (en) * 1986-08-12 1988-05-25 Precision Engineering Co Water treatment device
DE3737476C1 (en) * 1987-11-05 1988-10-06 Christoph Goetz & Co Teehandel Device for purifying a liquid
US4998228A (en) * 1990-02-09 1991-03-05 Douglas R. Eger Drinking water filter
US5128034A (en) * 1991-03-21 1992-07-07 Amway Corporation Pressure vessel for housing a water filter
US5190643A (en) * 1992-01-10 1993-03-02 Mr. Coffee, Inc. Water treatment device having means to count times used and limit useage
US5457665A (en) * 1994-03-10 1995-10-10 Innova Pure Water Inc. Elapsed time indicator
WO1996015994A1 (en) * 1994-11-17 1996-05-30 Recovery Engineering, Inc. End of life mechanism for water treatment cartridge

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US165512A (en) * 1875-07-13 Improvement in filters
US150866A (en) * 1874-05-12 Improvement in water coolers and filters
US498967A (en) * 1893-06-06 William b
US815102A (en) * 1905-02-23 1906-03-13 James Edward Lea Liquid-plow measurer and recorder.
US871253A (en) * 1906-02-20 1907-11-19 Charles W Bauman Measuring-faucet.
US1148943A (en) * 1914-11-09 1915-08-03 Earle Young Gasolene-meter.
US1208882A (en) * 1916-04-27 1916-12-19 William Mcgie Young Domestic water-bag.
US1432522A (en) * 1920-08-18 1922-10-17 Barnes Orange Perry Cooler and water filter
US1775355A (en) * 1929-02-16 1930-09-09 John G Peters Water filter
US2669707A (en) * 1950-04-29 1954-02-16 Bowser Inc Filter signal
US3687289A (en) * 1970-09-04 1972-08-29 Ecodyne Corp Water softener system
DE3413948A1 (en) * 1984-04-13 1985-10-24 Heinz 6204 Taunusstein Hankammer DEVICE FOR WATER PURIFICATION
US4698164A (en) * 1985-07-29 1987-10-06 Kinetico, Inc. Filter apparatus
DE8525643U1 (en) * 1985-10-05 1987-01-22 Alhaeuser, Erich, 5412 Ransbach-Baumbach, De
US4650571A (en) * 1985-11-29 1987-03-17 H. R. Black Company Automatic indexer for industrial filters
DE3810441C2 (en) * 1988-03-26 1994-09-08 Brita Wasserfilter Water purification device with an inlet funnel
DE8805718U1 (en) * 1988-04-30 1988-07-21 Brita Wasser-Filter-Systeme Gmbh, 6204 Taunusstein, De
US4918426A (en) * 1988-05-02 1990-04-17 Amway Corporation Method and apparatus for sensing fluid flow volume to indicate end of filter life
JPH0723597Y2 (en) * 1989-07-20 1995-05-31 株式会社荏原製作所 Self-priming pump device
US5089144B1 (en) * 1989-12-08 1996-11-12 Nartron Corp Filter condition indicator having moveable sensor and aggregate flow counter
JPH0655307B2 (en) * 1990-03-30 1994-07-27 松下電器産業株式会社 Filter
US5065901A (en) * 1990-04-09 1991-11-19 Brane Earl P Apparatus for monitoring a flow of fluid through a filter medium
US5139666A (en) * 1991-01-04 1992-08-18 Domotechnica Canada, Inc. Bottle and filter
US5057821A (en) * 1991-02-19 1991-10-15 Card Gary C Filter sentry apparatus
JP3258353B2 (en) * 1991-11-14 2002-02-18 三菱レイヨン株式会社 Household water purifier with life meter
US5236578A (en) * 1992-07-07 1993-08-17 American Home Water Products Corporation Filter life indicator for water purification system using magnetically actuated switch
US5328597A (en) * 1992-07-27 1994-07-12 The Clorox Corporation Electronic monitoring unit for monitoring number of uses of cartridge
AU4723693A (en) * 1992-08-14 1994-03-15 William Levene Limited Filter jug
JPH0677879U (en) * 1993-04-12 1994-11-01 峻 小山 Water purifier
CA2098127C (en) * 1993-06-10 1997-03-18 Brian Feeney Air inlet valve for water cooler
US5435909A (en) * 1994-03-14 1995-07-25 Hydrotechnology, Inc. A California Corp. Water quality monitor for a water purification system
US5562824A (en) * 1994-10-12 1996-10-08 Wtc/Ecomaster Corporation Gravity water purifier
US5536396A (en) * 1995-07-24 1996-07-16 Valuedirect Filtration Systems, Inc. Water filtration kit
US5765844A (en) * 1995-11-06 1998-06-16 Trw Inc. Linkage assembly
US5882507A (en) * 1996-04-30 1999-03-16 Recovery Engineering, Inc. Water filter cartridge end-of-life mechanism
US6103114A (en) * 1998-01-09 2000-08-15 Recovery Engineering, Inc. Pour-through water treatment carafe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197647A (en) * 1986-08-12 1988-05-25 Precision Engineering Co Water treatment device
DE3737476C1 (en) * 1987-11-05 1988-10-06 Christoph Goetz & Co Teehandel Device for purifying a liquid
US4998228A (en) * 1990-02-09 1991-03-05 Douglas R. Eger Drinking water filter
US5128034A (en) * 1991-03-21 1992-07-07 Amway Corporation Pressure vessel for housing a water filter
US5190643A (en) * 1992-01-10 1993-03-02 Mr. Coffee, Inc. Water treatment device having means to count times used and limit useage
US5457665A (en) * 1994-03-10 1995-10-10 Innova Pure Water Inc. Elapsed time indicator
WO1996015994A1 (en) * 1994-11-17 1996-05-30 Recovery Engineering, Inc. End of life mechanism for water treatment cartridge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 110 (C-0920), 18 March 1992 & JP 03 284394 A (MATSUSHITA ELECTRIC IND CO LTD), 16 December 1991, *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003028848A1 (en) * 2001-10-02 2003-04-10 Struttura S.R.L. A water-purification jug, for domestic use
GB2396121A (en) * 2001-10-02 2004-06-16 Struttura S R L A water-purification jug, for domestic use
GB2396121B (en) * 2001-10-02 2005-04-20 Struttura S R L A water-purification jug, for domestic use
EP2436431A3 (en) * 2002-08-07 2012-07-11 Strix Limited Water treatment apparatus
US8454826B2 (en) 2002-08-07 2013-06-04 Strix Limited Water treatment apparatus
EP2130799A1 (en) * 2008-05-27 2009-12-09 Laica S.p.A. A replaceable cartridge type filter for filtering systems and a filtering system incorporating the filter.
EP2130799B2 (en) † 2008-05-27 2016-10-19 Laica S.p.A. A replaceable cartridge type filter for filtering systems and a filtering system incorporating the filter.

Also Published As

Publication number Publication date
DE69738959D1 (en) 2008-10-16
RU2185330C2 (en) 2002-07-20
US5882507A (en) 1999-03-16
US20040173507A1 (en) 2004-09-09
US20020134715A1 (en) 2002-09-26
BR9709441A (en) 2000-01-11
EP0900174B1 (en) 2008-09-03
KR100463005B1 (en) 2005-04-06
CA2253248C (en) 2004-11-09
CN1216970A (en) 1999-05-19
JP2000508972A (en) 2000-07-18
KR20000065122A (en) 2000-11-06
CN1101784C (en) 2003-02-19
TW337493B (en) 1998-08-01
EP0900174A2 (en) 1999-03-10
HK1018769A1 (en) 2000-01-07
CA2253248A1 (en) 1997-11-06
US6649045B2 (en) 2003-11-18
US6881327B2 (en) 2005-04-19
WO1997041066A3 (en) 1998-03-12
US6423224B1 (en) 2002-07-23

Similar Documents

Publication Publication Date Title
US6649045B2 (en) Filter cartridge assembly for water treatment device
RU2145252C1 (en) Water treatment cartridge service life indicating mechanism
CA2288981C (en) End-of-life indicator for water treatment device
US5076912A (en) Ion exchange device with chamber having indicator means
EP2173665B2 (en) Percolation filtering system
US20140083924A1 (en) Filter unit and a water filtering device comprising a filter unit
RU98121320A (en) A WATER PROCESSING DEVICE WITH A CARTRIDGE, PROVIDING THE COUNTING OF THE NUMBER OF FILLINGS
EP0655938A1 (en) Filter jug.
EP0517737A4 (en) Dual chamber water filter
EP1739060B1 (en) Water treatment system
WO2004052789A2 (en) Filter cartridge for a standalone point of use water purification device
EP3323789B1 (en) Water filtration device
AU2012251480B2 (en) Water treatment apparatus
WO1994004245A1 (en) Filter jug
RU2124925C1 (en) Device for water filtration (variants)
RU2173571C1 (en) Mechanism of service life indication of device module for liquid purification (versions) and method of its use
JP3045001B2 (en) Pot type water purifier unit
JPH0131351Y2 (en)
KR100613367B1 (en) Water softener filer and ion purifier using the same

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 97194292.7

Country of ref document: CN

AK Designated states

Kind code of ref document: A2

Designated state(s): BR CA CN JP KR RU

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 2253248

Country of ref document: CA

Ref document number: 2253248

Country of ref document: CA

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1019980708718

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 1997920245

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1997920245

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1019980708718

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1019980708718

Country of ref document: KR