CA1157436A - Convertible dual container storage system - Google Patents
Convertible dual container storage systemInfo
- Publication number
- CA1157436A CA1157436A CA000346565A CA346565A CA1157436A CA 1157436 A CA1157436 A CA 1157436A CA 000346565 A CA000346565 A CA 000346565A CA 346565 A CA346565 A CA 346565A CA 1157436 A CA1157436 A CA 1157436A
- Authority
- CA
- Canada
- Prior art keywords
- tank
- storage system
- upper rim
- cover means
- open end
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/75—Regeneration or reactivation of ion-exchangers; Apparatus therefor of water softeners
Abstract
CONVERTIBLE DUAL CONTAINER STORAGE SYSTEM
ABSTRACT OF THE DISCLOSURE
A dual tank storage system is provided having a first generally cylindrical upstanding tank adapted to be positioned either adjacent to or within a second tank of larger diameter. The tanks are in fluid connection and are useful in systems requiring the segregated storage of two fluids until the fluids are mixed and used or in systems where a stored fluid is required periodically to regenerate the contents of another container. A cover is also provided which fits completely over the first tank, when the first tank is positioned within the second tank, and forms a seal with the upper rim of the second tank.
ABSTRACT OF THE DISCLOSURE
A dual tank storage system is provided having a first generally cylindrical upstanding tank adapted to be positioned either adjacent to or within a second tank of larger diameter. The tanks are in fluid connection and are useful in systems requiring the segregated storage of two fluids until the fluids are mixed and used or in systems where a stored fluid is required periodically to regenerate the contents of another container. A cover is also provided which fits completely over the first tank, when the first tank is positioned within the second tank, and forms a seal with the upper rim of the second tank.
Description
~FN ~ 5 7 ~3 6 . CON~ERTIBLE DUAL CONTAINER STOR~GE SYSTEM
.
BACKGROUND OF THE INVENTION
The present invention relates to convertible dual container systems, and more particularly to ~ystems where a fluid stored in one con-tainer is periodically required for use in a second container.
Dual container systems may find use in a wide variety of applications. For example, in systems requiring the segregated storage of two liquids for a period of time before mixing, blending, etc., a dual container system is a necessity. Additionally, some systems may require a second liquid periodically to regenerate the contents of a container through which a first process liquid has been flowing. These systems may include beds of ion exchange resins or filter media which periodically become exhaus~ed. A
particular application of dual container systems is in the field of domestic water softening.
Household water softeners utilizing ion exchange typically include a resin tank, through which hard water is passed and exchange of "hardl' ions of calcium and magnesium for "softl' sodium ions takes place, and a brine tank. After a period of operation the ion exchange resin in the resin tank needs to be regenerated to remove accumulated hardness ions and to replenish softness ions. This is accomplished by passing a salt solution from the brine tank through the resin bed.
The regeneration cycle typically lasts about an hour and needs to be done, on the average, about every other day. More frequent regenerations are required during periods of heavy water usage.
With each regeneration cycle, a new charge of brine solution is required. Typically, household water softening systems have provided for storage of dry salt pellets above the level of brine solution in the brine tank sufficient for providing brine solution for relatively long periods of time.
iL 1 5 ~
BFN 672~ -2-Prior ark household water softening systems have been constructed either with the bxine and resin tanks in a side-by-side relationship or with the resin tank fitted within the brine tank. Typical of the side-by-side structure is Rose, U. S. patent No. Re.
25,979~ This type of structure permits maximum storage capacity for salt and eliminates the need for frequently refilling the brine tank with salt.
However, the side-by-side structure requires a rela-tively large amount of floor space which may notalways be available in smaller homes or apartments.
Placing the resin tank within the brine tank as shown by Miller, U. S. patent No. 3,285,418~
and Prior et al, U. S. patent No. 3,891,55~, conserves lS floor space, but greatly reduces the volume of usable salt storage space within the brine tank and necessi-tates frequent xefilling thereof with salt. Addi-tionally, neither the prior art side-by-side tanks nor the resin tank within brine tank systems were ~Q adapted to convert from one configuration to the other if the need arose, such as for example, if the water conditioning system was moved to a different location. Moreover, distributors of domestic water softening systems had to stock both separate types of systems because convertibility from one to the other was not possible.
Accordingly, the need exists in the art for a dual container system which is easily con-vertible to either a side-by-side or tank within a tank configuration as the need arises and which, because of its adaptability, can be installed in a wide variety of locations.
19FN ~i722 _3_.
SUM~RY_OF THE INVENTION
In accordance with the present invention a convertible dual container system is provided having first and second tanks and a cover adapted to span the two when one is disposed within the other. The first tank is a vertically upstanding, generally cylindrical tank having a timer and multi-valve assembly associated therewith. The bottom of the first tank is of a flat, planar configuration such that the tank is freestanding without the need ~or any external supporting structure. The second tank is also of a generally cylindrical construction, but is designed to have a diameter greater than the diameter of the first tank. The second tank is also freestanding. The base of the second tank has a circular ridge upstanding therefrom into which the base of the first tank is adapted to fit. The ridge aids in the proper positioning of the first tank within the second tank when a tank-in-tank configura-tion is used~
The cover for the second tank is of ahollow, cylindrical configuration adapted to sealingly engage the upper rim of ths second tank. The cover has a tapered, upstanding wall spanned by a flat lid portion. A front portion of the wall of the cov~r is c~t off at an angle to the horizontal less than the remaining portions of the wall, forming a flat face upon whïch visual indicia may be printed. The height of the cover is such that when the first tank is 3Q positioned in the second tank, there is sufficient clearance for the cover to fit over the first tank and sealingly engage the upper rim portion of the second tank. The rear wall portion of the cover is provided with an opening whlch accommodates piping associated with the system.
L.l57ll~6 BFN 6722 -4~
The relative sizes of the individual components and the freestanding nature o both the 9 first and second tanks permits adaptability of the J
system to either a side by-side configuration or a 5 tank within a tank configuration. In this manner, a single dual container system can be adapted for uses which require a minimum of floor space or uses which require a maximum liquid storage capaclty.
In a preferred embodiment of this invention~ 1 10 the first tank will contain a bed of ion exchange ~i resin material and the second tank will contain a supply of a regenerating brine solution. In operation, raw water will be treated by passing it through the resin bed in the first tank. Periodically, brine 15 solution is flowed from the second tank through the resin bed to regenerate it.
Accordingly, it is an object of this inven-tion to provide a dual container system which is adaptable to meet a variety of space and storage 20 requirements; it is a further object of this invention to provide a freestanding tank which is adapted to fit înside of a larger diameter tank; it is yet another object of this invention to provide a tank cover adapted to be able to fit over an upstanding 25 tank disposed within a second tank and sealingly ~;
engage the upper rim portion of the second tank.
These and other objects and advantages of the inven-tion will become apparent from the following descrip-tion, the accompanying drawings, and the appended 30 claims.
BRIEF DESCRIPTION C)F THE DRAWINGS
Fi.g. 1 is a front elevation of the first and second tanks of the present invention in a side-by~side configuration;
r Fig. 2 is a front elevation of the ~anks of the present invention in a tank-in-tank configurationg with the first tank being shown in broken lines; and Fig. 3 is a view of the rear of the syste~
of Fig. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in Fig. 1, the dual container system of the present invention may be set up to operate in a side-by-side configuration In a preferred embociment, cylindrical tank 10 may contain ion exchange resin material to effect water softening. The resin is distributed throughout vertical section 12 of the tank and, for a typical domestic water softener, will contain 1.0 cubic foot or some portion thereof of resin. The resin may be any known ion exchange resin used in the art to soften water.
Tank 10 has a flat bottom which is encased in sleeve 1~ which snugly fits thereon. Sleeve 14 may be made of a rigid polymeric material or metal and has a generally cylindrical shape, closed at one end. Tank 10 may be fabricated of steel coated inside and out with a polymeric material to resist corrosion. Use of a steel tank permits operation of the tank at pressures up to 125 psi. At the top of tank 10 a timer and valve assembly 16 is attached thereto. All of the piping for the system is connected to valve assembly 16 including a raw water inlet, conditioned water outlet, and drain. The valve assembly also controls and directs the flow of liquid between the two tanks. In the preferred embodiment, valve assembly 16 is a five cycle flow control valve as taught by Rose, U.S. Patent No.
3,080,975.
;, ~
.~FN 6722 -6-Storage tank 20 has a diameter larger thantank 10 and is also of a generally cylindrical shape having a vertical section 22. Storage tank 20 may be constructed either of metal or a rigid polymeric material; the tank should be resistant to corrosion from the materials stored therein. In the base of tank 20, there is provided a circular upstanding ridge of material 24 sized to have a diameter slightly larger than the diameter of tank 10. The ridge may be molded into the base of tank 20 concurrent with the formation of the tank or may be secured in the tank during a later assembly operation. In this manner, when tank 10 is disposed in tank 20/ ridge 24 encircles the hase of tank 10, properly positioning it within tank 20. Means Inot shown) are provided to remove liquid from tank 20 and pass it through valve assembly 16 into tank lOo Storage tank 20 is provided with a cover 30 which has a tapered, upstanding wall 32 which is spanned by lid 34. Optionally, the cover may have a flat, angular portion 36 ~orming the front face of cover 30 and which may have visual indicia thereon relating to the operation of the system. The bottom edge 38 of cover 30 forms a collar which is adapted to sealingly engage the upper rim of tank 20. Cover 30 may be fabricated of the same materials as tank 20.
The combined height of tank 20 and cover 30 is such that tank 10 will fit within tank 20 and still permit cover 30 to sealingly engage the upper rim of tank 20.
As shown in Fig. 3, the back of cover 30 has an opening therein to receive the required piping ~or the system when it is in a tank-in-tank configura-tion. Liquid inlet 40, treated liquid outlet 42, and drain 44 are connected through valve assembly 16 to tank 10. A draw tube 46, positioned to have an ~57~31~ ~
3FN 6722 -7~
~ .
opening at the bottom of tank 20, is in fluid connection with tank 10 through the valve assembly.
In operation in its preferred embodiment as a water softening system, tank 10 will contain s 5 an ion exchange resin and tank 20 will contain a regenerating brine solution. Raw water will enter tank 10 through inlet 40 and valve assembly 16 and into the top of the tank. As the water passes down through the resin bed it is softened and passes into 10 an outlet distributor at the bottom of the tank and then to outlet 42. After the resin bed is exhausted, the direction of water flow through the resin bed i reversed to backwash the system, with water exiting b from drain 44. Then, brine from tank 20 is cycled 15 through inlet 40 into ~he resin bed in tank 10 to regenerate the resin. After regenexation, the brine is rinsed from tank 10, the tank refilled with raw water, and the softening cycle xepeated.
Because of the design of the system, it is 20 adaptable for many different needs requiring either maximum storage capacity of a liquid or a minimum of floor space. The design of the storage tank and cover to be adapted to completely enclose the first tank provides a convenient and attractive system 25 for the user.
.
BACKGROUND OF THE INVENTION
The present invention relates to convertible dual container systems, and more particularly to ~ystems where a fluid stored in one con-tainer is periodically required for use in a second container.
Dual container systems may find use in a wide variety of applications. For example, in systems requiring the segregated storage of two liquids for a period of time before mixing, blending, etc., a dual container system is a necessity. Additionally, some systems may require a second liquid periodically to regenerate the contents of a container through which a first process liquid has been flowing. These systems may include beds of ion exchange resins or filter media which periodically become exhaus~ed. A
particular application of dual container systems is in the field of domestic water softening.
Household water softeners utilizing ion exchange typically include a resin tank, through which hard water is passed and exchange of "hardl' ions of calcium and magnesium for "softl' sodium ions takes place, and a brine tank. After a period of operation the ion exchange resin in the resin tank needs to be regenerated to remove accumulated hardness ions and to replenish softness ions. This is accomplished by passing a salt solution from the brine tank through the resin bed.
The regeneration cycle typically lasts about an hour and needs to be done, on the average, about every other day. More frequent regenerations are required during periods of heavy water usage.
With each regeneration cycle, a new charge of brine solution is required. Typically, household water softening systems have provided for storage of dry salt pellets above the level of brine solution in the brine tank sufficient for providing brine solution for relatively long periods of time.
iL 1 5 ~
BFN 672~ -2-Prior ark household water softening systems have been constructed either with the bxine and resin tanks in a side-by-side relationship or with the resin tank fitted within the brine tank. Typical of the side-by-side structure is Rose, U. S. patent No. Re.
25,979~ This type of structure permits maximum storage capacity for salt and eliminates the need for frequently refilling the brine tank with salt.
However, the side-by-side structure requires a rela-tively large amount of floor space which may notalways be available in smaller homes or apartments.
Placing the resin tank within the brine tank as shown by Miller, U. S. patent No. 3,285,418~
and Prior et al, U. S. patent No. 3,891,55~, conserves lS floor space, but greatly reduces the volume of usable salt storage space within the brine tank and necessi-tates frequent xefilling thereof with salt. Addi-tionally, neither the prior art side-by-side tanks nor the resin tank within brine tank systems were ~Q adapted to convert from one configuration to the other if the need arose, such as for example, if the water conditioning system was moved to a different location. Moreover, distributors of domestic water softening systems had to stock both separate types of systems because convertibility from one to the other was not possible.
Accordingly, the need exists in the art for a dual container system which is easily con-vertible to either a side-by-side or tank within a tank configuration as the need arises and which, because of its adaptability, can be installed in a wide variety of locations.
19FN ~i722 _3_.
SUM~RY_OF THE INVENTION
In accordance with the present invention a convertible dual container system is provided having first and second tanks and a cover adapted to span the two when one is disposed within the other. The first tank is a vertically upstanding, generally cylindrical tank having a timer and multi-valve assembly associated therewith. The bottom of the first tank is of a flat, planar configuration such that the tank is freestanding without the need ~or any external supporting structure. The second tank is also of a generally cylindrical construction, but is designed to have a diameter greater than the diameter of the first tank. The second tank is also freestanding. The base of the second tank has a circular ridge upstanding therefrom into which the base of the first tank is adapted to fit. The ridge aids in the proper positioning of the first tank within the second tank when a tank-in-tank configura-tion is used~
The cover for the second tank is of ahollow, cylindrical configuration adapted to sealingly engage the upper rim of ths second tank. The cover has a tapered, upstanding wall spanned by a flat lid portion. A front portion of the wall of the cov~r is c~t off at an angle to the horizontal less than the remaining portions of the wall, forming a flat face upon whïch visual indicia may be printed. The height of the cover is such that when the first tank is 3Q positioned in the second tank, there is sufficient clearance for the cover to fit over the first tank and sealingly engage the upper rim portion of the second tank. The rear wall portion of the cover is provided with an opening whlch accommodates piping associated with the system.
L.l57ll~6 BFN 6722 -4~
The relative sizes of the individual components and the freestanding nature o both the 9 first and second tanks permits adaptability of the J
system to either a side by-side configuration or a 5 tank within a tank configuration. In this manner, a single dual container system can be adapted for uses which require a minimum of floor space or uses which require a maximum liquid storage capaclty.
In a preferred embodiment of this invention~ 1 10 the first tank will contain a bed of ion exchange ~i resin material and the second tank will contain a supply of a regenerating brine solution. In operation, raw water will be treated by passing it through the resin bed in the first tank. Periodically, brine 15 solution is flowed from the second tank through the resin bed to regenerate it.
Accordingly, it is an object of this inven-tion to provide a dual container system which is adaptable to meet a variety of space and storage 20 requirements; it is a further object of this invention to provide a freestanding tank which is adapted to fit înside of a larger diameter tank; it is yet another object of this invention to provide a tank cover adapted to be able to fit over an upstanding 25 tank disposed within a second tank and sealingly ~;
engage the upper rim portion of the second tank.
These and other objects and advantages of the inven-tion will become apparent from the following descrip-tion, the accompanying drawings, and the appended 30 claims.
BRIEF DESCRIPTION C)F THE DRAWINGS
Fi.g. 1 is a front elevation of the first and second tanks of the present invention in a side-by~side configuration;
r Fig. 2 is a front elevation of the ~anks of the present invention in a tank-in-tank configurationg with the first tank being shown in broken lines; and Fig. 3 is a view of the rear of the syste~
of Fig. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in Fig. 1, the dual container system of the present invention may be set up to operate in a side-by-side configuration In a preferred embociment, cylindrical tank 10 may contain ion exchange resin material to effect water softening. The resin is distributed throughout vertical section 12 of the tank and, for a typical domestic water softener, will contain 1.0 cubic foot or some portion thereof of resin. The resin may be any known ion exchange resin used in the art to soften water.
Tank 10 has a flat bottom which is encased in sleeve 1~ which snugly fits thereon. Sleeve 14 may be made of a rigid polymeric material or metal and has a generally cylindrical shape, closed at one end. Tank 10 may be fabricated of steel coated inside and out with a polymeric material to resist corrosion. Use of a steel tank permits operation of the tank at pressures up to 125 psi. At the top of tank 10 a timer and valve assembly 16 is attached thereto. All of the piping for the system is connected to valve assembly 16 including a raw water inlet, conditioned water outlet, and drain. The valve assembly also controls and directs the flow of liquid between the two tanks. In the preferred embodiment, valve assembly 16 is a five cycle flow control valve as taught by Rose, U.S. Patent No.
3,080,975.
;, ~
.~FN 6722 -6-Storage tank 20 has a diameter larger thantank 10 and is also of a generally cylindrical shape having a vertical section 22. Storage tank 20 may be constructed either of metal or a rigid polymeric material; the tank should be resistant to corrosion from the materials stored therein. In the base of tank 20, there is provided a circular upstanding ridge of material 24 sized to have a diameter slightly larger than the diameter of tank 10. The ridge may be molded into the base of tank 20 concurrent with the formation of the tank or may be secured in the tank during a later assembly operation. In this manner, when tank 10 is disposed in tank 20/ ridge 24 encircles the hase of tank 10, properly positioning it within tank 20. Means Inot shown) are provided to remove liquid from tank 20 and pass it through valve assembly 16 into tank lOo Storage tank 20 is provided with a cover 30 which has a tapered, upstanding wall 32 which is spanned by lid 34. Optionally, the cover may have a flat, angular portion 36 ~orming the front face of cover 30 and which may have visual indicia thereon relating to the operation of the system. The bottom edge 38 of cover 30 forms a collar which is adapted to sealingly engage the upper rim of tank 20. Cover 30 may be fabricated of the same materials as tank 20.
The combined height of tank 20 and cover 30 is such that tank 10 will fit within tank 20 and still permit cover 30 to sealingly engage the upper rim of tank 20.
As shown in Fig. 3, the back of cover 30 has an opening therein to receive the required piping ~or the system when it is in a tank-in-tank configura-tion. Liquid inlet 40, treated liquid outlet 42, and drain 44 are connected through valve assembly 16 to tank 10. A draw tube 46, positioned to have an ~57~31~ ~
3FN 6722 -7~
~ .
opening at the bottom of tank 20, is in fluid connection with tank 10 through the valve assembly.
In operation in its preferred embodiment as a water softening system, tank 10 will contain s 5 an ion exchange resin and tank 20 will contain a regenerating brine solution. Raw water will enter tank 10 through inlet 40 and valve assembly 16 and into the top of the tank. As the water passes down through the resin bed it is softened and passes into 10 an outlet distributor at the bottom of the tank and then to outlet 42. After the resin bed is exhausted, the direction of water flow through the resin bed i reversed to backwash the system, with water exiting b from drain 44. Then, brine from tank 20 is cycled 15 through inlet 40 into ~he resin bed in tank 10 to regenerate the resin. After regenexation, the brine is rinsed from tank 10, the tank refilled with raw water, and the softening cycle xepeated.
Because of the design of the system, it is 20 adaptable for many different needs requiring either maximum storage capacity of a liquid or a minimum of floor space. The design of the storage tank and cover to be adapted to completely enclose the first tank provides a convenient and attractive system 25 for the user.
Claims (5)
1. A convertible dual container storage system comprising:
a first vertically upstanding, generally cylindrical tank, said first tank having means to maintain itself in a freestanding, upright position and adapted to be positioned next to or within a second larger tank;
a second vertically upstanding, generally cylindrical tank having a diameter larger than said first tank, an upper rim, and a circular ridge extending upwardly from the base thereof adapted to partially surround and position said first tank in said second tank, said first and second tanks being in fluid connection with each other; and a hollow, generally cylindrical cover means having a tapered, upstanding wall portion spanned by a flat lid portion, and having an open end of slightly larger diameter than said upper rim of said second tank, whereby said open end of said cover means is adapted to sealingly engage said upper rim of said second tank, said upstanding wall portion of said cover means having sufficient height such that when said first tank is disposed within said second tank, said cover means fits over the top of said first tank and sealingly engages said upper rim of said second tank.
a first vertically upstanding, generally cylindrical tank, said first tank having means to maintain itself in a freestanding, upright position and adapted to be positioned next to or within a second larger tank;
a second vertically upstanding, generally cylindrical tank having a diameter larger than said first tank, an upper rim, and a circular ridge extending upwardly from the base thereof adapted to partially surround and position said first tank in said second tank, said first and second tanks being in fluid connection with each other; and a hollow, generally cylindrical cover means having a tapered, upstanding wall portion spanned by a flat lid portion, and having an open end of slightly larger diameter than said upper rim of said second tank, whereby said open end of said cover means is adapted to sealingly engage said upper rim of said second tank, said upstanding wall portion of said cover means having sufficient height such that when said first tank is disposed within said second tank, said cover means fits over the top of said first tank and sealingly engages said upper rim of said second tank.
2. The storage system of claim 1 where said means to maintain said first tank in a freestanding, upright position comprises a cylindrical sleeve having an open end and a flat closed end, said sleeve adapted to fit over the bottom of said tank.
3. The storage system of claim 2 where said open end of said cover means has a collar, said collar engaging the upper rim of said tank and providing frictional engagement of said cover means with said second tank.
4. The storage system of claim 3 where said first tank contains an ion exchange resin suitable for exchanging divalent metal cations in water for soft sodium cations.
5. The storage system of claim 4 where said second tank contains a brine solution for regenerating said ion exchange resin in said first tank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2173879A | 1979-03-19 | 1979-03-19 | |
| US021,738 | 1979-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1157436A true CA1157436A (en) | 1983-11-22 |
Family
ID=21805860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000346565A Expired CA1157436A (en) | 1979-03-19 | 1980-02-27 | Convertible dual container storage system |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1157436A (en) |
| FR (1) | FR2451863A1 (en) |
| GB (1) | GB2046621B (en) |
-
1980
- 1980-02-27 CA CA000346565A patent/CA1157436A/en not_active Expired
- 1980-03-18 GB GB8009027A patent/GB2046621B/en not_active Expired
- 1980-03-18 FR FR8006018A patent/FR2451863A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2451863A1 (en) | 1980-10-17 |
| GB2046621B (en) | 1983-02-16 |
| GB2046621A (en) | 1980-11-19 |
| FR2451863B3 (en) | 1982-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |