US3229854A - Water conditioning system - Google Patents
Water conditioning system Download PDFInfo
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- US3229854A US3229854A US285638A US28563863A US3229854A US 3229854 A US3229854 A US 3229854A US 285638 A US285638 A US 285638A US 28563863 A US28563863 A US 28563863A US 3229854 A US3229854 A US 3229854A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/686—Devices for dosing liquid additives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/4891—With holder for solid, flaky or pulverized material to be dissolved or entrained
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Description
Filed June 5, 1963 2 6 WW 2). A m 31 may; W K 4, WW W. m" MMM b. 4 Z fl w Aw w 4 si -w y /YI W W W M 0 \"V J. %Y% 6 I B W W m ,1 M M w w .1 q." /m W W, V I 1 Z a i Z 4, 1/ L 3 2 K f K W I 4V4!!! Wm m i I I W Z I 7 7m p 0 m I y 3:: 4 5:: Z.
Jan. 18, 1966 United States Patent 3,229,854 I WATERCONDITIONING SYSTEM Alfred H. Turnquist, Columbia Heights, Miun., assignor to Union Tank Car Company, Chicago, Ill., :1 corporation of New Jersey Filed June 5, 1963, Ser. No. 285,638 Glaims. (Cl. 22267) This inventionrelates to means for dispensing a liquid and, more particularly, to an aciddispenser suitable for use in a water softening system.
Water softening with ion exchange resin particles is well known in the art. After prolonged contact of the ionexchange resin particles with raw water, these resin particles become exhauste i.e.,. their ability to exchange soft ions for the hard ions inthe raw wateris substantially diminished. Whenthe ion exchange resin particles become exhausted, they must be regenerated. Heretofore, regeneration has been effected by contacting the resin particles with a brine solution, e.g., an aqueous solution of sodium chloride. More recently, it has been found thatit is desirable toregenerate the ion exchange resin particles by contacting the resin particles with an aqueous acid solution, such ascitric acid or the like, and a brine solution. A sequential process may be employed wherein the resin particles are contacted first with the acid solution-andthen the brine solution. Likewise, the resin particles may be simultaneously contacted with the acid solution and the brinesolution. These processes are discussedin detail in copending application Serial No. 170,043, filed January 31, 1962, now abandoned, and assigned to the assignee of the present application. In any event, such processes require. means-to dispense the aqueous acid solution whichis to be contacted withthe resin particles during the regeneration cycle.
Accordingly, it is an object for the present invention to provide a means for dispensing a liquid;
It is another object of the present invention to provide a means for dispensing a predetermined amount of liquid.
It is a further object of the present invention to provide a liquid dispenser adapted to dispense a predetermined amount ofa liquid to a line, the liquid dispenser being actuated by the pressure inthe line.
It is stillanother object of the present invention to provide means for dispensing a predetermined amount of an aqueous acid solution.
It is a-still further object of the'present invention to provide a metering device for a liquid dispenser.
It is yet another object of the present invention to provide a metering device for a liquid, the metering device being adapted to be used=with a container for the liquid.
These and other objects more apparent hereinafter are' realized by the liquid dispenser embodying the features of the present invention. The liquid dispenser'is adapted to dispense a predetermined-amount of liquid to a line to which it is attached. The pressure in theline actuates the liquid dispenser. Ametering device embodying. the features of the present invention receives and dispenses the predetermined amount of liquid and is adapted to "be used with various containers for the liquid.
The invention, bothas to its organization and method of operation, taken with further objects and advantages thereof, will be understood by reference to the following description taken in conjunction with-the accompanying drawings, in. which:
FIGURE 1 is a schematic diagram of a. water softening system wherein Water is treated with ion. exchange resin particles, which are regenerated by an acid solution-and a brine solution, the acid solution being supplied from an acid dispenser embodying-the features of the present: invention;
FIGURE 2 is a cross-sectional view of the acid dis=- penser shown in FIGURE 1 as a metering device in the acid dispenser is being filled with acid solution;
FIGURE 3 is an enlarged fragmentary View of the acid dispenser shown in FIGURE 1 as'the metering device in the acid dispenser is being filled with acid solution, as illustrated in FIGURE 2;
FIGURE 4 is a cross-sectional view of the acid dispenser of FIGURE 1 after acid solution has been dispensed to the ion exchange resin particles.
Referring to the drawings, and more particularly to FIGURE 1, there is schematically illustrated a water softeningsystem for treating water with-ion exchange resin particles. Suitable ion exchange resin particles are well known in the art and do not constitute a part of the pres ent invention. In this system the ion exchange resin particles, when they become exhausted, are regenerated sequentially with an acid solution and a brine solution.
During the service cycle, raw water from a suitable source is passed through a feed line 10 to a main valve indicated generally by reference numeral 12. The main valve 12 directs the raw water through a line 14' to a resin tank lfi-whichcontains a bed of the ion exchange resin particles as is well known in the art. The raw water passes through the bed of ion exchange resin particles and is Withdrawn from the tank lo-through a line 18. The treated water, which has been softened by contact with the ion exchange resin particles, passes through the line 18 to the main valve 12 which directs it to a service line 22. There is, of course, no mixing of the treated water with the raw water in the main valve '12.
After a predetermined quantity of raw water has passed through the resin tank 16, the ion exchange resin particles lose their capacity to effectivelysoften the raw Water and must be regenerated. This is effected by sequentially contacting the exhausted resin particles with an acid solution and a brine solution. The regeneration cycle is initiated by actuating the main valve 12 so that a portion of the raw water from the line 10 is directed to the service line 22. In this manner, a supply of Water is maintained to the service line 22 during theregeneration cycle. The remainder of the raw water is'directed by the main valve 12 through a line 24 into an aspirator valve 20. Asthe raw water passes through the aspirator valve 20 in this direction a partial vacuum, -i.e., a pressure less than atmospheric pressure, is'create'd therein and in a line 26 which communicates with the aspirator valve 20, a brine tank 28 and an acid dispenser 30 embodying the features of the present invention. By virtue of the partial vacuum created in the line 26, a predetermined amount ofacid solution is drawn from the acid dispenser 30 and-brine solution is drawn from the brine tank 28: The acid solution and brine'solution pass se-' quentially through the line 26 into the aspirator valve 20 andthrough a line 19 to the line 18 and into the tank 16; Suitablevalve means (not shown) prevent acid solution andbrine solution from passing directly from the line 18 into themain valve 12; After passing upward- 1y through the bed-ofresin particles in the tank 16,
passes through the. line 1'4,=the-tank '16, the line 18, the
- As will be more fully explained hereinafter, the high pressure (greater than atmospheric pressure) of the treated water in the line 26 causes the acid dispenser 30 to meter another predetermined amount of acid solution during the service cycle so that the acid dispenser 30 is ready to discharge this acid solution to the line 26 during the regeneration cycle. The partial vacuum .or low pressure in the line 26 during the regeneration cycle actuates the acid dispenser 30 whereupon it dispenses the predetermined amount of acid solution which has been metered during the service cycle.
The main valve 12 does not constitute a part of the present invention and suitable valves for this purpose are wellknown in the art, e.g., the main valve disclosed in United States Patent No. 2,999,514, assigned to the assignee of the present application. Another suitable main valve is disclosed in copending application Serial No.
190,995 filed April 30, 1962, and assigned to the assignee of the present application. Similarly, suitable aspirator valves 20 are well known in the art. However, it is preferred in this system to employ an aspirator valve of the type disclosed in copending applications Serial No. 170,043, filed January 31, 1962, now abandoned and Serial No. 191,767, filed May 2, 1962,, which are assigned to the assignee of the present application. The system may, of course, be operated manually, automatically or semi-automatically by suitable means (not shown) which do not constitute a part of the present invention.
Referring now to FIGURES 2-4, the acid dispenser 30 embodying the features of the present invention will be discussed in detail. The acid dispenser 30 comprises an acid container 34 and a metering device indicated generally by reference numeral 36. The acid container 34 is, in this instance, a plastic bottle having a neck portion 38, though the container 34 may be made of suitable metal or glass if desired. The container 34 forms an acid reservoir chamber 35 and contains a relatively large supply of a suitable aqueous acid solution, such as citric acid or the like.
The metering device 36 is mounted in the neck portion 38 of the container 34 and extends into the reservoir chamber 35. The metering device 36 comprises a body member 37, made of suitable plastic, metal or the like, having a metering chamber 40 and an outlet chamber 42. interconnected by a passageway 44 and is adapted to be mounted in the neck portion 38 of the acid container 34. To these ends the body member 37 has exterior sealing means 46, such as an O-ring or the like, adapted to engage the interior of the neck portion 38 to prevent acid from leaking between the neck portion 38 and the body member, 37. An enlarged end portion 48 of the body member 37 engages the neck portion 38 so that the metering device 36 extends into the acid container 34 a predetermined distance.
The outlet chamber 42, which communicates with the line 26 through a passageway 56 in the body member 37 and a passageway 70 in the line 26, has mounted therein a ball valve 50 biased by a spring 52. The ball valve 50 is biased to engage a valve seat 54 and thereby close the passageway 44 interconnecting the metering chamber 40 with the outlet chamber 42. The passageway 56 allows acid solution to pass from the outlet chamber 42 to the line 26.
member 61 and the body member 37. If it is desired to decrease or increase the time for filling the metering chamber 40, the sleeve member 61 may be replaced with another sleeve member having a smaller or larger passageway, respectively. A vent tube 62,. which communicates with the metering chamber 40, is attached to the body member 37 and extends outwardly from the metering device 36 to vent air displaced as the metering chamber 40 is being filled with acid solution through the passageway 60. The floatable ball valve 58 is adapted to rise with the level of the acid solution as it fills the metering compartment 40 and will close the passageway 60 and the 1 vent tube 62 when the metering compartment 40 has been substantially filled with acid solution, as shown in dotted lines in FIGURES 2 and 3.
The line 26 has a radially extending, annular flange 64 with a threaded exterior surface. The end portion 48 of the metering device 36 has an annular groove with a threaded portion 66 to threadedly engage the annular flange 64. An annular seal 68 is providedjin the end portion 48 of the body member 37 to prevent air and liquid leakage between end portion 48 and the flange 64. In this manner, the metering device 36 may be attached to the flange 64 so that the outlet chamber 42 communicates with the line 26 through the passageway 56 and the passageway 70 in the line 26..
To install the acid dispenser 30, the metering device 36 is inserted into the acid container 34 while the latter.
is in its upright position, i.e., the neck portion 38 extending upwardly. The metering device 36 is inserted into the container 34 until the enlarged end portion 48 of the body member 36 abuts the neck portion 38. They acid container 34 has a relatively large supply of acid solution therein. The acid dispenser 30 is then turned over to its operating position shown in FIGURES 2-4 and attached to the line 26 by screwing the metering device 36 onto the flange 64. The spring-biased ball valve 50, which is seated on the valve seat 54, prevents acid solution from leaking out the passageway 44 when the acid dispenser 30 is turned over. In addition, the sealing means 46 prevents air and acid leakage between the acid container 34 and the metering device 36 as discussed hereinbefore. A hole 72 is then opened in the bottom of the acid container 34 so that the acid reservoir chamber 35 As seen in FIGURES 2 is vented to the atmosphere. and 4 when the dispenser 30 is turned over intoits operative position and attached to the line 26, the level of the acid solution in the reservoir chamber 35 will be above the passageway 60 and below the free end of the vent tube 62.
Assuming that the water softening system is in its service cycle, the line 26 will be under high pressure.
and the ball valve 50 will be seated on the valve seat 54 so that the passageway 44 is closed. Acid solution will flow by gravity from the reservoir chamber 35 into until is closes the passageway 60. In this manner, a,
predetermined amount of acid solution enters the metering chamber 40.
When the resin particles are ready for regeneration, the
regeneration cycle is initiated and the line 26 placed under a partial vacuum or low pressure as described hereinbefore. By virtue of the pressure differential between the metering chamber 40 and the outlet chamber 42, the ball valve 50! will unseat against the force of the spring 52, as shown in FIGURE 4. When the ball valve 50 unseats, acid solution flows from the metering'chamber 40 through the passageway 44, the outlet chamber 42 and the passageway 56 into the passageway 70 and the line 26. The flow of acid solution continues until the floatable ball valve 58 closes the passageway 44 by resting on a valve seat '74.
The discharge of the acid solution from the metering chamber 40 is relatively rapid and only a small amount of acid solution will enter the metering chamber 40 during acid discharge if the passageway 60 is small, as in this instance. Accordingly, the amount of acid solution dispensed to the line 26 is essentially the volume of the metering chamber 40. However, as discussed hereinbefore, the size of the passageway 60 may be varied to allow a greater amount of acid solution to enter the metering compartment 40 during discharge and this additional acid solution will simultaneously be dispensed to the line 26. In any event, with a given passageway 60 the amount of acid solution dispensed in each regeneration cycle will be substantially constant and not less than approximately the volume of the metering chamber 40. Of course, the passageway 60 cannot be so large that acid solution enters the metering chamber 40 faster than it is withdrawn from the metering chamber 40 through the passageway 44.
The floatable ball valve 58 seats on the valve seat 74 when there is a small amount of acid solution left in the metering chamber 40, as shown in FIGURE 4. In this manner, gas may not be drawn into the system through the passageway 44. Furthermore, the partial vacuum in the line 26 during the regenation cycle prevents the floatable ball valve 58 from unseating, even though acid solution continues to enter the metering chamber 40, until the service cycle begins and the ball valve 50 has seated on the valve seat 54.
After the regeneration cycle has been completed, the service cycle is initiated again. The line 26 is again placed under a high pressure, causing the ball valve 50 to seat on the valve seat 54 and the ball valve 58 to unseat. The metering chamber 40 fills up with acid solution in the manner described hereinbefore and the cycle is repeated.
When the level of the acid solution in the reservoir chamber 35 approaches the level of the passageway 60 additional acid solution must be added to the reservoir chamber 35, for example, thorugh the vent opening 72. In the alternative, the acid dispenser 30 may be removed and the metering device 36 placed in another acid container. The metering device 36 and the other acid con tainer are then connected to the line 26 in the same manner as the acid dispenser 30.
Although the ball valve 50 has been described and illustrated as a spring-biased ball valve, any one-way valve which will open at low pressure and close at high pressure may be employed. Such valves are well known in the art and the selection of a suitable valve means to be substituted for the ball valve 50 would be within the ordinary skill of one in the art.
It will be understood that by altering the piping from the aspirator valve 20 the resin particles in the tank 16 may be contacted simultaneously with acid solution and brine solution. In such instances, the acid solution and brine solution are mixed in the aspirator valve 20 or in a line connected thereto as the acid solution and brine solution travel to the resin tank 16.
Though the dispenser 30 has been discussed in detail with respect to dispensing acid solution, it may be used to dispense any liquid by constructing its parts of suitable material.
While the embodiment described herein is at present considered to be preferred, it will be understood that various modifications and improvements may be made therein and it is intended'to cover in the appended claims all such modifications and improvements as fall within the true spirit and scopeof the invention.
What is claimed is:
1. A metering device comprising a body member having a metering chamber therein to receive liquid from a reservoir chamber, said metering chamber having a floatable valve means therein, said body member 'having an outlet passageway communicating with said metering chamber, said outlet passageway having a normally closed valve means therein openable under a predetermined pressure difierential, said valve means preventing liquid from flowing into said metering chamber from said outlet passageway and allowing liquid to flow from said metering chamber to said outlet passageway when said pressure difierential between said metering chamber and said outlet passageway opens said valve means.
2. The metering device of claim 1 wherein said body member has a second passageway to allow liquid to flow into said metering chamber, said floatable valve means closing said second passageway when said metering cham ber has been substantially filled with liquid.
3. The metering device of claim 1 wherein said body member has an end adapted to be inserted into a liquid container and another end adapted to be connected to a line so that said outlet passageway communicates with said line.
4. The metering device of claim 2 wherein said floatable valve means closes said outlet passageway when said metering chamber is substantially without liquid.
5. A liquid dispenser comprising a container means for a liquid and a metering device, said metering device including a body member having a metering chamber therein to receive liquid from said container means, said metering chamber having a floatable valve means therein, said body member having an outlet passageway communicating with said metering chamber, said outlet passageway having a normally closed valve means therein openable under a predetermined pressure differential, said valve means in said outlet passageway preventing liquid from flowing into said metering chamber from said outlet passageway and allowing liquid to flow from said metering chamber to said outlet passageway when said pressure differential between said metering chamber and said outlet passageway opens said valve means.
6. The liquid dispenser of claim 5 wherein said body member cooperates with said container means to prevent liquid leakage between said body member and said container means.
7. The liquid dispenser of claim 6 wherein. said body member has a second passageway to allow liquid to flow into said metering chamber from said container means, said floatable valve means closing said second passageway when said metering chamber has been substantially filled with liquid.
8. The liquid dispenser of claim 7 wherein said body member has an end extending from said container means which is adapted to be connected to a line to which liquid is dispensed from said metering chamber.
9. A liquid dispenser comprising a container means for a liquid and a metering device, said metering device including a body member extending into said liquid container means, said body member having first and second end portions, a metering chamber in said first end portion and an outlet chamber in said second end portion, said outlet chamber and metering chamber being connected by a first passageway, 21 second passageway in said body member to connect said metering chamber with said container means, a floatable valve means in said metering chamber which closes said second passageway when said metering chamber is substantially full of said liquid and closes said first passageway when said metering chamber is substantially empty of said liquid, a valve means mounted in said outlet chamber, said valve means includ References Cited by the Examiner ing means for closing said first passageway when said UNITED STATES PATENTS outlet chamber is under a high pressure and opening said 1,698,890 1/1929 MCGiH 210 206 first passageway when said outlet chamber has a low 1,905,726 4/1933 Lindsay 210 190 pressure 5 2,627,503 2/1953 Anderson 210-490 10. The dispensing device of claim 9 wherein said sec- 2,895,652 7/1959 Rockriver 222442 end end portion has means for attaching said dispensing 3,039,655 6/1962 Pfeuifer 222133 device to a line, said outlet chamber communicating with 3,049,266 8/1962 'Y 222133 said line so that said liquid from said metering chamber 10 3072302 1/1963 Giouannoni et 222442 passes to said line. RAPHAEL M. LUPO, Primary Examiner.
Claims (1)
1. A METERING DEVICE COMPRISING A BODY MEMBER HAVING A METERING CHAMBER THEREIN TO RECEIVE LIQUID FROM A RESERVOIR CHAMBER, SAID METERING CHAMBER HAVING A FLOATABLE VALVE MEANS THEREIN, SAID BODY MEMBER HAVING AN OUTLET PASSAGEWAY COMMUNICATING WITH SAID METERING CHAMBER, SAID OUTLET PASSAGEWAY HAVING A NORMALLY CLOSED VALVE MEANS THEREIN OPENABLE UNDER A PREDETERMINED PRESSURE DIFFERENTIAL, SAID VALVE MEANS PREVENTING LIQUID FROM
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US285638A US3229854A (en) | 1963-06-05 | 1963-06-05 | Water conditioning system |
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US285638A US3229854A (en) | 1963-06-05 | 1963-06-05 | Water conditioning system |
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US285638A Expired - Lifetime US3229854A (en) | 1963-06-05 | 1963-06-05 | Water conditioning system |
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Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3342338A (en) * | 1966-06-06 | 1967-09-19 | Gen Ionics Corp | Water treating apparatus with agentadding dispenser |
US3406870A (en) * | 1966-04-18 | 1968-10-22 | Arneson Prod Inc | Swimming pool chlorinator |
US3487933A (en) * | 1966-09-12 | 1970-01-06 | Union Tank Car Co | Acid dispenser for water softener |
US3616971A (en) * | 1970-02-24 | 1971-11-02 | Precision Valve Corp | Dispenser and metering valve therefor |
US3749288A (en) * | 1970-09-09 | 1973-07-31 | Whirlpool Co | Liquid dispenser |
US3795262A (en) * | 1972-09-25 | 1974-03-05 | J Post | Dispensing device and method for introducing fluid into high pressure lines |
US3881637A (en) * | 1973-09-10 | 1975-05-06 | Browne Engineering Company | One-shot metering valve |
US3890657A (en) * | 1974-05-16 | 1975-06-24 | Roy M Gray | Chemical dispenser for toilet |
US4249675A (en) * | 1978-03-15 | 1981-02-10 | Kenova Ab | Device for dispensing fluid from a container |
EP0077208A1 (en) * | 1981-10-13 | 1983-04-20 | Clow Corporation | Apparatus for intermittently dispensing a liquid additive into a flowing liquid stream |
US4452268A (en) * | 1976-03-02 | 1984-06-05 | Westfalia Separator Ag | Cleaning apparatus for milk conveying paths in animal milking machines |
US4508246A (en) * | 1983-09-19 | 1985-04-02 | Grenn James F | Check means for a water dispenser |
USRE32231E (en) * | 1975-10-06 | 1986-08-26 | DAGMA Deutsche Automaten-und Getrakemaschinen-Gesellschaft mit beschrankter Haftung & Co. | Container for metered dispensing of liquid |
US4887744A (en) * | 1988-06-08 | 1989-12-19 | Williams Forrest D | Dispenser for a carbonated beverage bottle |
US4957218A (en) * | 1986-07-28 | 1990-09-18 | Ballard Medical Products | Foamer and method |
US5152015A (en) * | 1991-07-03 | 1992-10-06 | Reckitt & Colman Inc. | Additive product dispensing apparatus |
US5323938A (en) * | 1992-11-19 | 1994-06-28 | The Authentic Group Inc. | Pre-measured liquid and powder dispenser with overflow lube |
US5339988A (en) * | 1992-10-19 | 1994-08-23 | Ballard Medical Products | Disposable tray sump foamer, assembly and methods |
US5801315A (en) * | 1995-11-23 | 1998-09-01 | Samsung Electronics Co., Ltd. | Developer flow check system and method thereof |
US6076708A (en) * | 1997-12-02 | 2000-06-20 | Ceccarelli; Loreto J. | Pre-measured liquid dispenser |
US20040069570A1 (en) * | 2002-10-11 | 2004-04-15 | John Baumann | Mist distributor with integral air solenoid valve |
FR2887904A1 (en) * | 2005-07-01 | 2007-01-05 | Gilles Allard | DEVICE DISPENSING A CLEANING PRODUCT |
US20090134077A1 (en) * | 2007-11-28 | 2009-05-28 | Mckinney Jerry L | Treatment System |
US9937514B2 (en) * | 2016-09-13 | 2018-04-10 | Nordson Corporation | Fluid applicator having a valve module with a floating member and the valve module |
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US1698890A (en) * | 1927-08-30 | 1929-01-15 | Reiter Company | Chemical filter and base-exchange softener |
US1905726A (en) * | 1929-04-01 | 1933-04-25 | Trupar Mfg Company | Method of and means for softening water |
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Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3406870A (en) * | 1966-04-18 | 1968-10-22 | Arneson Prod Inc | Swimming pool chlorinator |
US3342338A (en) * | 1966-06-06 | 1967-09-19 | Gen Ionics Corp | Water treating apparatus with agentadding dispenser |
US3487933A (en) * | 1966-09-12 | 1970-01-06 | Union Tank Car Co | Acid dispenser for water softener |
US3616971A (en) * | 1970-02-24 | 1971-11-02 | Precision Valve Corp | Dispenser and metering valve therefor |
US3749288A (en) * | 1970-09-09 | 1973-07-31 | Whirlpool Co | Liquid dispenser |
US3795262A (en) * | 1972-09-25 | 1974-03-05 | J Post | Dispensing device and method for introducing fluid into high pressure lines |
US3881637A (en) * | 1973-09-10 | 1975-05-06 | Browne Engineering Company | One-shot metering valve |
US3890657A (en) * | 1974-05-16 | 1975-06-24 | Roy M Gray | Chemical dispenser for toilet |
USRE32231E (en) * | 1975-10-06 | 1986-08-26 | DAGMA Deutsche Automaten-und Getrakemaschinen-Gesellschaft mit beschrankter Haftung & Co. | Container for metered dispensing of liquid |
US4452268A (en) * | 1976-03-02 | 1984-06-05 | Westfalia Separator Ag | Cleaning apparatus for milk conveying paths in animal milking machines |
US4249675A (en) * | 1978-03-15 | 1981-02-10 | Kenova Ab | Device for dispensing fluid from a container |
US4414996A (en) * | 1981-10-13 | 1983-11-15 | Uop Inc. | System for automatically dispensing liquid chemicals into an intermittently flowing liquid stream |
EP0077208A1 (en) * | 1981-10-13 | 1983-04-20 | Clow Corporation | Apparatus for intermittently dispensing a liquid additive into a flowing liquid stream |
US4508246A (en) * | 1983-09-19 | 1985-04-02 | Grenn James F | Check means for a water dispenser |
US4957218A (en) * | 1986-07-28 | 1990-09-18 | Ballard Medical Products | Foamer and method |
US4887744A (en) * | 1988-06-08 | 1989-12-19 | Williams Forrest D | Dispenser for a carbonated beverage bottle |
US5152015A (en) * | 1991-07-03 | 1992-10-06 | Reckitt & Colman Inc. | Additive product dispensing apparatus |
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