US3469696A - Filtration apparatus - Google Patents

Filtration apparatus Download PDF

Info

Publication number
US3469696A
US3469696A US699504A US3469696DA US3469696A US 3469696 A US3469696 A US 3469696A US 699504 A US699504 A US 699504A US 3469696D A US3469696D A US 3469696DA US 3469696 A US3469696 A US 3469696A
Authority
US
United States
Prior art keywords
water
container
scale
additive
core
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.)
Expired - Lifetime
Application number
US699504A
Inventor
Raymond Mark Petrucci
Marcel Clarence Sicard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMF Inc
Specialty Materials Inc
Original Assignee
AMF 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 AMF Inc filed Critical AMF Inc
Application granted granted Critical
Publication of US3469696A publication Critical patent/US3469696A/en
Assigned to AMF CUNO INC. reassignment AMF CUNO INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMF INCORPRATED, A CORP. OF NJ
Assigned to SPECIALTY MATERIALS INC. reassignment SPECIALTY MATERIALS INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMF CUNO INC., A CORP OF DE.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B01D29/54Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • C02F9/20Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus
    • C02F2201/006Cartridges

Definitions

  • a cartridge type water treatment device employing means'for selectively removing solid, taste and odor and scale forming agents including means for controlling flow through the scale forming agent.
  • the invention presently disclosed concerns the treatment of fluids and more specifically equipment for and processes of simultaneously purifying, and importing desirable additives to, potable water particularly when used in apparatus such as coffee vending machines.
  • the type of machine in case must, of economic necessity, function with an absolute minimum of skilled maintenance; the financial burden of such maintenance, which is commonly needed where conventional scale controllers are employed is, when added to the first cost of such devices, commonly prohibitive.
  • FIGURE 1 is a vertical center-line section of a preferred embodiment of the invention
  • FIGURE 2 is a cross-section of the device taken on the line 22 of FIGURE 2
  • FIGURE 3 is a vertical center-line section showing a modified form of the embodiment shown in FIGURE 1,
  • FIGURE 4 is a detail view of the flap valve of FIG. 3.
  • FIGURE 1 a complete operative organization is shown. It comprises a pressure-tight housing 10, incorporating a container or sump 12 and a head 14 which, together, describe a cavity 16.
  • the said sump 12 and head 14 are secured to each other by a coupling ring 18 having a radially inwardly extending flange 20 engaging a cooperating flange 22 on sump 12 and further having a screw thread 24 cooperative with a mating thread 26 on head 14; an elastomeric O-ring 28 is carried in a suitable groove 30 formed in the said head and engages the inner surface of sump 12 to afford a leak-proof joint at that point.
  • the head 14 has a suitably threaded inlet port 32 giving access to the cavity 16; it also has a suitable threaded outlet port 34 affording an exit passage from the said cavity.
  • the organization further comprises a unitized fluid treating element 36 which, as shown, is located within cavity 16 and'interposed between the said inlet port and the said outlet port so that all fluid flowing atent O 'ice from one to the other must pass through the element.
  • FIGURE 1 bears a series of arrows indicating the direction of such flow.
  • the element 36 is cylindrical in shape; it has a substantially impervious longitudinally extending outer wall 38 and end walls 40 and 42 to which are attached respectively, resilient gaskets 44 and 46.
  • the wall 38 is pierced adjacent end wall 42 by one or more openings 48 to allow fluid to flow from the outside of the element to its interior, as will later be explained in more detail.
  • the gasket 46 has sealing engagement with the ring 50 which projects downwardly from the underside of head 14 and surrounds the entrance to outlet port 34.
  • the other gasket 44 has a similar sealing engagement with pedestal 52 which closes the opening 54 in the center of endwall 4-0 and because of the approximately spherical curvature of the bottom of sump 12 holds the element substantially central therein.
  • a second thick-walled tubular foraminous filter member 62 is located within the chamber 60 with one end abutting wall 42; it has two outer diameters, the larger of these, 64, has close engagement with the inner surface of wall 38 while the smaller diameter 66, together with shoulder 68 forms an annular space 70 as shown, which provides a distribution channel for fluid which may enter the element 36 through openings 48; additionally, member 62 has a smaller inner diameter 72 that closely engages the outer surface of core 56 while the larger inner diameter 74 affords a drainage area for fluid flowing through the member from space 70 to chamber 60. It may here be remarked that the first mentioned filter member 58 is smaller in diameter than the adjacent wall 38 affording adequate access to the outer surface of said member.
  • the additive desired in this case polyphosphate which, when dissolved in the water being treated, combines with the scale forming materials therein and holds them in suspension
  • the container is preferrably arranged so that the water flows past an orifice in its wall, or alternatively, in one orifice and out of another one axially adjacent to it so that, in either case, the water does not flow through a granular bed of additive but, instead, picks some of a saturated solution of additive from a quiescent pool thereof within the container.
  • a mathematically precise proportion of additive to water being treated may be obtained if effort is taken to calculate the size of the orifices, flow rates and pressures.
  • Various valve means and movable dispensing devices may also be employed if desired. We however, have found that the orifices as described are eminently satisfactory and preferable because of their simplicity.
  • a shell 76 which surrounds the core 56 and is closed by end walls 78 and 80 which are sealed to said core and form an annular space for the expendable additive 82.
  • the remainder of the chamber 60 is tightly packed with granular activated carbon 84, of which more later.
  • An opening 86 is formed in end wall 80 facing toward the fluid flowing through the element 36, i.e. it faces upstream.
  • a second opening 88 is located in the side wall of shell 76 very slightly below the said end wall 80 and is spaced approximately 180 from the opening 86; a pad 90 of foraminous material, which may be similar to that forming the filter members 58 and 62, is placed over the additive 82 to prevent water that enters opening 86 impinging directly thereon. Instead, it flows transversely through the said pad and out of the container via opening 88. In so doing the Water encounters the saturated solution dispersing, from the earlier mentioned quiescent pool" 92 in which the additive 82 lies, into the pad 90 and dilutes and entrains some of the solution so that it passes from the container into the main stream of water flowing through the element and on, via the interior of core 56 to outlet port 34.
  • FIG- URE 3 In normal commercial service the slight diffusion of dissolved poly-phosphate, used as an additive, which may occur during non-use is of no importance. It may however, be objected to where there are very long periods of disuse which could permit an undesirable diifusion of solute material down stream.
  • the construction of FIG- URE 3 is arranged to take care of a condition of that nature.
  • the device is very similar to that of FIGURE 1 and accordingly reference numerals are applied only to those parts which are mentioned in relation to the modifications involved. To prevent such undesired diffusion we locate the additive container 104, without change, adjacent to upper filter member 62.
  • a flexible disc or circular flap valve 94 made of any convenient elastomeric material in the form of a cup having a central aperture 96 and held in place by an expansive spring ring 98.
  • the cup 94 is so placed that its upper surface 100 bears on the lower edge of shell 76 and, when there is no flow, closes oil? that part of the chamber 60 which is above it, from the part below.
  • a slight differential pressure across the valve 94 will flex it downward to permit fiuid flow.
  • a suitable screen disc 102 secured in any convenient manner, serves to keep the granular carbon 84, away from the valve seat.
  • valves may be applied direct to openings 86 and 88 but the low differential pressure across them is not conducive to reliability.
  • the above described device provides a water-treating means having three functions.
  • the filter members 58 and 62 will remove filterable impurities and the second member, 86 is effective in holding back the activated carbon 84 which adsorbs objectionable taste and odor transporting elements from the water being treated.
  • the dispensed additive is effective in guarding the equipment which the device serves, against the deposition of scale.
  • the filter members being in series, may and preferably do have their relative porosities arranged so that the dirt load is shared between them. It is also of interest to note that the carbon, by its property of adsorbing and subsequently releasing the solute additive helps to keep the proportion thereof uniform.
  • Apparatus for treating Water comprising a substantially impervious envelope having water inlet and outlet means, said envelope having therein a fibrous filter media located adjacent said inlet for removal of solids from said water, a bed of activated carbon granules located downstream of said fibrous filter for removal of taste and odor from said filtered water, a cohesive mass of scale formation inhibiting media located adjacent said bed of activated carbon granules and means for controlling passage of said Water through said scale forming inhibiting means to permit only a selected portion thereof to pass therethrough prior to the existing of the filtered water from said envelope.
  • said scale forming inhibiting means comprise a bed of polyphosphate crystal contained in a second envelope having means to disperse said polyphosphate within said water.
  • Apparatus for treating liquid passed therethrough said device comprising a first filter member, a bed of adsorptive material and a second filter member arranged in an envelope for the passage of liquid being treated through said members and said material in the order named, said device further comprising a container containing a soluble media for inhibiting the deposition of scale from said liquid, said container being situate within said envelope for diffusion of said media into said liquid, and valve means for permitting a selected proportion only of said liquid to pass through said scale inhibiting media, said device being effective to treat said liquid by substantially simultaneously removing at least a part of any solids therein by filtration, removing at least a part of any noxious taste and odor creating components therein by absorption and combining at least part of any scale forming matter therein with a scale deposition inhibiting media.
  • said envelope comprise a tube having a first end wall having an aperture, a tubular core inside and co-directional with said tube and having one end secured to said first end Wall in said aperture, said first filter member embracing said core and having peripheral contact with the inner surface of said tube to form a foraminous partition dividing the cavity surrounding said core and within said envelope into two parts; said second filter member being located within said tube, secured to the end of said core remote from said first end wall and alfording a filtering passage from said cavity to the interior of said core, said tube having a second end wall at the end remote from said first end wall, affording support to said second filter member and closing one end of said cavity; said bed of adsorptive material and said container being in said cavity between said first and said second filter members, said container comprising a wall defining a chamber containing said media, an opening aifording access for liquid within said cavity to said media and a valve on the downstream side of said container for controlling the dispersion of said scale forming inhibiting media in response to

Description

Sept. 30, 196 R. M. PETRUCCI ETAL FILTRATION APPARATUS Filed Jan. 22, 1968 S Q m Q. nmu EN A A N m PM MM 7 I 1 WW M E 5 WWW W RMv m M a s Q Q 1 Q E Q x & Q ww l w N\\ Q g Q NM NS fa; Q
Claims ABSTRACT OF THE DISCLQSURE A cartridge type water treatment device employing means'for selectively removing solid, taste and odor and scale forming agents including means for controlling flow through the scale forming agent.
The invention presently disclosed concerns the treatment of fluids and more specifically equipment for and processes of simultaneously purifying, and importing desirable additives to, potable water particularly when used in apparatus such as coffee vending machines.
A common problem with the above mentioned apparatus in addition to filterable impurities, is the deleterious effect of scale deposited from the water onto the surfaces of pipes, tanks and especially the orifices and seats' of automatic valves. The type of machine in case must, of economic necessity, function with an absolute minimum of skilled maintenance; the financial burden of such maintenance, which is commonly needed where conventional scale controllers are employed is, when added to the first cost of such devices, commonly prohibitive. With the above mentioned conditions in mind we have devised as an answer to the problem an inexpensive, simple and reliable apparatus needing only the most elementary skill to maintain and which is entirely automatic and completely reliable in operation. In brief, one object of our invention is to provide a simple means of dispensing a 'scale suppressing medium into a water supply. Another object is to incorporate dispensing means into a water purifying device without complicating operating or maintenance procedures. How these and other desiderata are achieved will be apparent to those versed in the art on examination of the following specification and claims, together with the drawings of which FIGURE 1 is a vertical center-line section of a preferred embodiment of the invention, FIGURE 2 is a cross-section of the device taken on the line 22 of FIGURE 2,
FIGURE 3 is a vertical center-line section showing a modified form of the embodiment shown in FIGURE 1,
FIGURE 4 is a detail view of the flap valve of FIG. 3.
In FIGURE 1 a complete operative organization is shown. It comprises a pressure-tight housing 10, incorporating a container or sump 12 and a head 14 which, together, describe a cavity 16. The said sump 12 and head 14 are secured to each other by a coupling ring 18 having a radially inwardly extending flange 20 engaging a cooperating flange 22 on sump 12 and further having a screw thread 24 cooperative with a mating thread 26 on head 14; an elastomeric O-ring 28 is carried in a suitable groove 30 formed in the said head and engages the inner surface of sump 12 to afford a leak-proof joint at that point. The head 14 has a suitably threaded inlet port 32 giving access to the cavity 16; it also has a suitable threaded outlet port 34 affording an exit passage from the said cavity. The organization further comprises a unitized fluid treating element 36 which, as shown, is located within cavity 16 and'interposed between the said inlet port and the said outlet port so that all fluid flowing atent O 'ice from one to the other must pass through the element. FIGURE 1 bears a series of arrows indicating the direction of such flow.
The element 36 is cylindrical in shape; it has a substantially impervious longitudinally extending outer wall 38 and end walls 40 and 42 to which are attached respectively, resilient gaskets 44 and 46. The wall 38 is pierced adjacent end wall 42 by one or more openings 48 to allow fluid to flow from the outside of the element to its interior, as will later be explained in more detail. As may be seen by reference to FIGURE 1, the gasket 46 has sealing engagement with the ring 50 which projects downwardly from the underside of head 14 and surrounds the entrance to outlet port 34. The other gasket 44 has a similar sealing engagement with pedestal 52 which closes the opening 54 in the center of endwall 4-0 and because of the approximately spherical curvature of the bottom of sump 12 holds the element substantially central therein. The force applied axially of said unit, which affords the compressive effort needed to effect the sealing engagement just mentioned, results from the telescopic load applied to sump 12 and head 14 by tightening coupling ring 18. Located centrally within element 36 is a substantially impervious tube or core 56 which is secured at one end in an opening in end wall 42 and which is supported at its other end by a thick-walled tubular foraminous filter member 58 secured, in sealing engagement, to end wall 40; this arrangement affords a central discharge passage for fluid flowing radially inwardly through filter member 58 and also provides an annular chamber 60. A second thick-walled tubular foraminous filter member 62 is located within the chamber 60 with one end abutting wall 42; it has two outer diameters, the larger of these, 64, has close engagement with the inner surface of wall 38 while the smaller diameter 66, together with shoulder 68 forms an annular space 70 as shown, which provides a distribution channel for fluid which may enter the element 36 through openings 48; additionally, member 62 has a smaller inner diameter 72 that closely engages the outer surface of core 56 while the larger inner diameter 74 affords a drainage area for fluid flowing through the member from space 70 to chamber 60. It may here be remarked that the first mentioned filter member 58 is smaller in diameter than the adjacent wall 38 affording adequate access to the outer surface of said member.
The additive desired (in this case polyphosphate which, when dissolved in the water being treated, combines with the scale forming materials therein and holds them in suspension) is most conveniently stored in a container 104 carried within the element 36. The container is preferrably arranged so that the water flows past an orifice in its wall, or alternatively, in one orifice and out of another one axially adjacent to it so that, in either case, the water does not flow through a granular bed of additive but, instead, picks some of a saturated solution of additive from a quiescent pool thereof within the container. A mathematically precise proportion of additive to water being treated may be obtained if effort is taken to calculate the size of the orifices, flow rates and pressures. Various valve means and movable dispensing devices may also be employed if desired. We however, have found that the orifices as described are eminently satisfactory and preferable because of their simplicity.
Considering next the preferred construction; within the chamber 60 and adjacent the filter member 58 is a shell 76 which surrounds the core 56 and is closed by end walls 78 and 80 which are sealed to said core and form an annular space for the expendable additive 82. The remainder of the chamber 60 is tightly packed with granular activated carbon 84, of which more later. An opening 86 is formed in end wall 80 facing toward the fluid flowing through the element 36, i.e. it faces upstream. A second opening 88 is located in the side wall of shell 76 very slightly below the said end wall 80 and is spaced approximately 180 from the opening 86; a pad 90 of foraminous material, which may be similar to that forming the filter members 58 and 62, is placed over the additive 82 to prevent water that enters opening 86 impinging directly thereon. Instead, it flows transversely through the said pad and out of the container via opening 88. In so doing the Water encounters the saturated solution dispersing, from the earlier mentioned quiescent pool" 92 in which the additive 82 lies, into the pad 90 and dilutes and entrains some of the solution so that it passes from the container into the main stream of water flowing through the element and on, via the interior of core 56 to outlet port 34.
In normal commercial service the slight diffusion of dissolved poly-phosphate, used as an additive, which may occur during non-use is of no importance. It may however, be objected to where there are very long periods of disuse which could permit an undesirable diifusion of solute material down stream. The construction of FIG- URE 3 is arranged to take care of a condition of that nature. The device is very similar to that of FIGURE 1 and accordingly reference numerals are applied only to those parts which are mentioned in relation to the modifications involved. To prevent such undesired diffusion we locate the additive container 104, without change, adjacent to upper filter member 62. Immediately below the said container is a flexible disc or circular flap valve 94 made of any convenient elastomeric material in the form of a cup having a central aperture 96 and held in place by an expansive spring ring 98. The cup 94 is so placed that its upper surface 100 bears on the lower edge of shell 76 and, when there is no flow, closes oil? that part of the chamber 60 which is above it, from the part below. A slight differential pressure across the valve 94 will flex it downward to permit fiuid flow. A suitable screen disc 102, secured in any convenient manner, serves to keep the granular carbon 84, away from the valve seat. Alternatively, valves may be applied direct to openings 86 and 88 but the low differential pressure across them is not conducive to reliability.
The above described device provides a water-treating means having three functions. The filter members 58 and 62 will remove filterable impurities and the second member, 86 is effective in holding back the activated carbon 84 which adsorbs objectionable taste and odor transporting elements from the water being treated. The dispensed additive is effective in guarding the equipment which the device serves, against the deposition of scale. Additionally, the filter members, being in series, may and preferably do have their relative porosities arranged so that the dirt load is shared between them. It is also of interest to note that the carbon, by its property of adsorbing and subsequently releasing the solute additive helps to keep the proportion thereof uniform.
What is claimed:
1. Apparatus for treating Water comprising a substantially impervious envelope having water inlet and outlet means, said envelope having therein a fibrous filter media located adjacent said inlet for removal of solids from said water, a bed of activated carbon granules located downstream of said fibrous filter for removal of taste and odor from said filtered water, a cohesive mass of scale formation inhibiting media located adjacent said bed of activated carbon granules and means for controlling passage of said Water through said scale forming inhibiting means to permit only a selected portion thereof to pass therethrough prior to the existing of the filtered water from said envelope.
2. The apparatus according to claim 1 wherein said scale forming inhibiting means comprise a bed of polyphosphate crystal contained in a second envelope having means to disperse said polyphosphate within said water.
3. The apparatus according to claim 1 having a valve on the downstream side of said cohesive mass for controlling the dispersion of said scale forming inhibiting media in response to the How of water within said apparatus thereby preventing excess dispersion during periods of non-flow.
4. Apparatus for treating liquid passed therethrough, said device comprising a first filter member, a bed of adsorptive material and a second filter member arranged in an envelope for the passage of liquid being treated through said members and said material in the order named, said device further comprising a container containing a soluble media for inhibiting the deposition of scale from said liquid, said container being situate within said envelope for diffusion of said media into said liquid, and valve means for permitting a selected proportion only of said liquid to pass through said scale inhibiting media, said device being effective to treat said liquid by substantially simultaneously removing at least a part of any solids therein by filtration, removing at least a part of any noxious taste and odor creating components therein by absorption and combining at least part of any scale forming matter therein with a scale deposition inhibiting media.
5. The apparatus according to claim 4 wherein said envelope comprise a tube having a first end wall having an aperture, a tubular core inside and co-directional with said tube and having one end secured to said first end Wall in said aperture, said first filter member embracing said core and having peripheral contact with the inner surface of said tube to form a foraminous partition dividing the cavity surrounding said core and within said envelope into two parts; said second filter member being located within said tube, secured to the end of said core remote from said first end wall and alfording a filtering passage from said cavity to the interior of said core, said tube having a second end wall at the end remote from said first end wall, affording support to said second filter member and closing one end of said cavity; said bed of adsorptive material and said container being in said cavity between said first and said second filter members, said container comprising a wall defining a chamber containing said media, an opening aifording access for liquid within said cavity to said media and a valve on the downstream side of said container for controlling the dispersion of said scale forming inhibiting media in response to the flow of water within said apparatus thereby preventing excess dispersion during periods of non-flow.
References Cited UNITED STATES PATENTS 2,521,802 9/1950 Otto 23-272.? 3,250,397 5/1966 Moltchan 2l0282 X 3,254,771 6/1966 Sicard 210282 X 3,327,859 6/1967 Pall 210282 X 3,342,335 9/1967 Gamundi et al. 2l0282 X 3,342,340 9/ 1967 Shindell 210282 3,357,563 12/1967 Sicard 210282 X FOREIGN PATENTS 553,819 3/1958 Canada.
MICHAEL E. ROGERS, Primary Examiner US. Cl. X.R.
US699504A 1968-01-22 1968-01-22 Filtration apparatus Expired - Lifetime US3469696A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69950468A 1968-01-22 1968-01-22

Publications (1)

Publication Number Publication Date
US3469696A true US3469696A (en) 1969-09-30

Family

ID=24809615

Family Applications (1)

Application Number Title Priority Date Filing Date
US699504A Expired - Lifetime US3469696A (en) 1968-01-22 1968-01-22 Filtration apparatus

Country Status (1)

Country Link
US (1) US3469696A (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753495A (en) * 1971-06-01 1973-08-21 Flickertail Ind Inc Water conditioning unit
US4347224A (en) * 1980-05-30 1982-08-31 Ecodyne Corporation Chemical dispenser
US4605499A (en) * 1985-02-19 1986-08-12 WISE Lawrence Water filter
US4724079A (en) * 1985-01-11 1988-02-09 Gloria Stephan Sale Water purification process
US4724104A (en) * 1986-02-27 1988-02-09 Gold Star Co., Ltd. Humidifier provided with a purifier
US4933080A (en) * 1989-01-13 1990-06-12 Associated Mills Inc. Housing with replaceable filter cartridge for use with shower head
US5128034A (en) * 1991-03-21 1992-07-07 Amway Corporation Pressure vessel for housing a water filter
US5366642A (en) * 1991-04-09 1994-11-22 Kpa, Incorporated Compact water filtration and purification pump
US5431816A (en) * 1991-04-09 1995-07-11 Sweetwater, Inc. Prefilter for a water purification pump
US5433848A (en) * 1991-04-09 1995-07-18 Kpa, Inc. Water filtration pump with disposable filter cartridges
WO1995027547A1 (en) * 1994-04-07 1995-10-19 Biotage, Inc. Apparatus for pressurizing a removable chromatography cartridge
US5534145A (en) * 1991-04-09 1996-07-09 Sweetwater, Inc. Compact water filtration pump
US5569316A (en) * 1995-03-01 1996-10-29 Stanhope Products Company Desiccant container having mount for canister tube and inner wall extension portion
US5685087A (en) * 1995-09-08 1997-11-11 Stanhope Products Company Fluid flow adsorbent container
US5716432A (en) * 1996-02-12 1998-02-10 Stanhope Products Company Desiccant container
US5792360A (en) * 1993-11-13 1998-08-11 Borden Chemical Uk Limited Water treatment system comprising water-soluble glass
US5837039A (en) * 1996-04-17 1998-11-17 Stanhope Products Company Adsorbent packet for air conditioning accumulators
WO1999029391A1 (en) * 1997-12-11 1999-06-17 Hughes Douglass E Shower filter allowing higher showerhead placement
EP0933337A1 (en) * 1998-01-15 1999-08-04 Canpro Water Treatment Inc. Water softening assembly
US6090285A (en) * 1998-01-15 2000-07-18 Chau; Yiu Chau Tank treatment assembly
US20050247637A1 (en) * 2004-05-06 2005-11-10 Sher Alexander A Water treatment method in high cycle dispensing systems for scale control
US20060261000A1 (en) * 2005-05-08 2006-11-23 Bassett Laurence W Filter cartridge and method of construction thereof
US20090038944A1 (en) * 2007-08-10 2009-02-12 Eric John Kruger Fluid treatment device
WO2011110075A1 (en) * 2010-03-08 2011-09-15 Chau Yiuchau Unit, assembly and apparatus for treating fluid
US11130691B2 (en) 2017-12-22 2021-09-28 Cabot Corporation Anti-scaling composition for water systems

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521802A (en) * 1947-05-16 1950-09-12 Hagan Corp Feeding device
CA553819A (en) * 1958-03-04 J. Parker Elliot Water softening device for motor vehicles
US3250397A (en) * 1962-01-16 1966-05-10 Floyd J Moltchan Water conditioning filter unit
US3254771A (en) * 1962-04-11 1966-06-07 American Mach & Foundry Means for treating fluids
US3327859A (en) * 1963-12-30 1967-06-27 Pall Corp Portable unit for potable water
US3342340A (en) * 1964-02-27 1967-09-19 Eaton Yale & Towne Water conditioning apparatus
US3342335A (en) * 1964-12-08 1967-09-19 Eaton Mfg Co Water conditioner
US3357563A (en) * 1964-03-02 1967-12-12 American Mach & Foundry Apparatus for treating water

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA553819A (en) * 1958-03-04 J. Parker Elliot Water softening device for motor vehicles
US2521802A (en) * 1947-05-16 1950-09-12 Hagan Corp Feeding device
US3250397A (en) * 1962-01-16 1966-05-10 Floyd J Moltchan Water conditioning filter unit
US3254771A (en) * 1962-04-11 1966-06-07 American Mach & Foundry Means for treating fluids
US3327859A (en) * 1963-12-30 1967-06-27 Pall Corp Portable unit for potable water
US3342340A (en) * 1964-02-27 1967-09-19 Eaton Yale & Towne Water conditioning apparatus
US3357563A (en) * 1964-03-02 1967-12-12 American Mach & Foundry Apparatus for treating water
US3342335A (en) * 1964-12-08 1967-09-19 Eaton Mfg Co Water conditioner

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753495A (en) * 1971-06-01 1973-08-21 Flickertail Ind Inc Water conditioning unit
US4347224A (en) * 1980-05-30 1982-08-31 Ecodyne Corporation Chemical dispenser
US4724079A (en) * 1985-01-11 1988-02-09 Gloria Stephan Sale Water purification process
US4605499A (en) * 1985-02-19 1986-08-12 WISE Lawrence Water filter
US4724104A (en) * 1986-02-27 1988-02-09 Gold Star Co., Ltd. Humidifier provided with a purifier
US4933080A (en) * 1989-01-13 1990-06-12 Associated Mills Inc. Housing with replaceable filter cartridge for use with shower head
US5128034A (en) * 1991-03-21 1992-07-07 Amway Corporation Pressure vessel for housing a water filter
US5431816A (en) * 1991-04-09 1995-07-11 Sweetwater, Inc. Prefilter for a water purification pump
US5433848A (en) * 1991-04-09 1995-07-18 Kpa, Inc. Water filtration pump with disposable filter cartridges
US5534145A (en) * 1991-04-09 1996-07-09 Sweetwater, Inc. Compact water filtration pump
US5366642A (en) * 1991-04-09 1994-11-22 Kpa, Incorporated Compact water filtration and purification pump
US5792360A (en) * 1993-11-13 1998-08-11 Borden Chemical Uk Limited Water treatment system comprising water-soluble glass
WO1995027547A1 (en) * 1994-04-07 1995-10-19 Biotage, Inc. Apparatus for pressurizing a removable chromatography cartridge
US5601708A (en) * 1994-04-07 1997-02-11 Dyax Corp. Apparatus for pressurizing a removable chromatography cartridge
US5569316A (en) * 1995-03-01 1996-10-29 Stanhope Products Company Desiccant container having mount for canister tube and inner wall extension portion
US5685087A (en) * 1995-09-08 1997-11-11 Stanhope Products Company Fluid flow adsorbent container
US5716432A (en) * 1996-02-12 1998-02-10 Stanhope Products Company Desiccant container
US5914456A (en) * 1996-04-17 1999-06-22 Stanhope Products Company Adsorbent packet for air conditioning accumulators
US5837039A (en) * 1996-04-17 1998-11-17 Stanhope Products Company Adsorbent packet for air conditioning accumulators
WO1999029391A1 (en) * 1997-12-11 1999-06-17 Hughes Douglass E Shower filter allowing higher showerhead placement
US6096197A (en) * 1997-12-11 2000-08-01 Hughes; Douglass E. Shower filter for chlorine removal and scale deposit prevention
US6267887B1 (en) 1997-12-11 2001-07-31 Douglass E. Hughes Shower filter for chlorine removal and scale deposit prevention
US6090285A (en) * 1998-01-15 2000-07-18 Chau; Yiu Chau Tank treatment assembly
EP0933337A1 (en) * 1998-01-15 1999-08-04 Canpro Water Treatment Inc. Water softening assembly
US7144513B2 (en) * 2004-05-06 2006-12-05 Nestec S.A. Water treatment method in high cycle dispensing systems for scale control
US20050247637A1 (en) * 2004-05-06 2005-11-10 Sher Alexander A Water treatment method in high cycle dispensing systems for scale control
US8246883B2 (en) 2005-05-08 2012-08-21 3M Innovative Properties Company Filter cartridge and method of construction thereof
US20080237924A1 (en) * 2005-05-08 2008-10-02 3M Innovative Properties Company Filter cartridge and method of construction thereof
US20060261000A1 (en) * 2005-05-08 2006-11-23 Bassett Laurence W Filter cartridge and method of construction thereof
US20090038944A1 (en) * 2007-08-10 2009-02-12 Eric John Kruger Fluid treatment device
US20110042221A1 (en) * 2007-08-10 2011-02-24 Eric John Kruger Method and apparatus for treating a fluid
US8187444B2 (en) 2007-08-10 2012-05-29 Eric John Kruger Fluid treatment device
US8388817B2 (en) 2007-08-10 2013-03-05 Eric John Kruger Method and apparatus for treating a fluid
WO2011110075A1 (en) * 2010-03-08 2011-09-15 Chau Yiuchau Unit, assembly and apparatus for treating fluid
US9527015B2 (en) 2010-03-08 2016-12-27 Yiu Chau Chau Unit, assembly and apparatus for treating fluid
US11130691B2 (en) 2017-12-22 2021-09-28 Cabot Corporation Anti-scaling composition for water systems

Similar Documents

Publication Publication Date Title
US3469696A (en) Filtration apparatus
CA1097228A (en) Water purifier with bypass
US3319791A (en) Poppet valve and disposable container combination
US4713175A (en) Water purifier comprising stages mounted side-by-side to unitary header
US3342340A (en) Water conditioning apparatus
US3289847A (en) Fluid filtering and treating apparatus
JP2805709B2 (en) Water purifier
US2389185A (en) Apparatus for the purification of water
US5071551A (en) Water purifier
US5057214A (en) Filtration and backwash control system for water filters associated with spigot faucets
US3357563A (en) Apparatus for treating water
US2633990A (en) Filxeking device
US4882061A (en) Filter apparatus
US2110009A (en) Oil filter
US5406974A (en) Automatic fluid flow control and strainer device
US5006245A (en) Water purifying device
US3442800A (en) Method and apparatus for filtering and dosing a liquid
US3595397A (en) Filter apparatus
US6132611A (en) Dynamic action filtration system
US2848112A (en) Filter apparatus
US2243949A (en) Refrigerating circuit purifier
US2122119A (en) Process for straining liquids
US188274A (en) Improvement in filters
US966181A (en) Filtering device.
US1285493A (en) Back-pressure valve.

Legal Events

Date Code Title Description
AS Assignment

Owner name: AMF CUNO INC., 400 RESEARCH PARKWAY, MERIDEN, CT.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMF INCORPRATED, A CORP. OF NJ;REEL/FRAME:004499/0451

Effective date: 19851111

AS Assignment

Owner name: SPECIALTY MATERIALS INC., 400 RESEARCH PARKWAY, ME

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMF CUNO INC., A CORP OF DE.;REEL/FRAME:004528/0383

Effective date: 19860124