CA2787547A1 - Double wall storage container for liquids - Google Patents
Double wall storage container for liquids Download PDFInfo
- Publication number
- CA2787547A1 CA2787547A1 CA2787547A CA2787547A CA2787547A1 CA 2787547 A1 CA2787547 A1 CA 2787547A1 CA 2787547 A CA2787547 A CA 2787547A CA 2787547 A CA2787547 A CA 2787547A CA 2787547 A1 CA2787547 A1 CA 2787547A1
- Authority
- CA
- Canada
- Prior art keywords
- tank
- storage container
- improved storage
- outer tank
- inner tank
- 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.)
- Abandoned
Links
Abstract
An improved storage container is provided for storing liquids, such as agricultural chemicals. The container includes a one-piece, molded inner tank which can be installed and removed from a molded outer tank, such that the container has a dual wall construction formed by the assembled inner and outer tanks. A centering bead is provided in the bottom of the outer tank to facilitate alignment of the inner tank within the outer tank. A
horizontal shelf surrounds the mouth of the outer tank, with a horizontal rim on the top of the inner tank overlying the shelf. A seal may be provided between the shelf and the rim to inhibit moisture migration. A drip edge is provided on the outer perimeter of the top of the inner tank to further inhibit moisture migration between the shelf and the rim. A tab on the rim is received in a notch in the shelf to preclude relative rotation between the nested tanks.
horizontal shelf surrounds the mouth of the outer tank, with a horizontal rim on the top of the inner tank overlying the shelf. A seal may be provided between the shelf and the rim to inhibit moisture migration. A drip edge is provided on the outer perimeter of the top of the inner tank to further inhibit moisture migration between the shelf and the rim. A tab on the rim is received in a notch in the shelf to preclude relative rotation between the nested tanks.
Description
DOUBLE WALL STORAGE CONTAINER FOR LIQUIDS
BACKGROUND OF THE INVENTION
Various types of storage containers are well-known for containing liquids, including agricultural chemicals. Some storage containers include double walls which precludes spillage or leakage of the liquid if the outer wall is damaged, such as a puncture, without damage to the interior wall of the container. If there is a leak in the inner tank, the liquid is captured by the outer tank. Some double walled containers are fabricated as a single unit in which the inner and outer walls cannot be separated. Other double wail containers include separate inner and outer tanks which nest together.
However, the structure and manufacture of all these double wall containers is relatively complex, and thus costly.
Accordingly, a primary objective of the present invention is the provision of an improved storage container for liquids having separate inner and outer tanks.
Another objective of the present invention is the provision of an improved storage container for liquids which has a double walled construction.
A further objective of the present invention is the provision of an improved storage container for liquids having an inner tank which can be removably nested within an outer tank.
Still another objective of the present invention is the provision of an improved storage container for liquids having an inner tank which fits into an outer tank, with the outer tank having a centering bead to facilitate installation of the inner tank into the outer tank.
Yet another objective of the present invention is the provision of an improved storage container for liquids wherein an inner tank has a top rim which overhangs an upper shelf or shoulder on the lower tank.
Another objective of the present invention is the provision of an improved storage container having separable nesting inner and outer tanks with means to preclude rotation of the tanks relative to one another when assembled together.
A further objective of the present invention is the provision of an improved storage container for liquids having dual inner and outer tanks which are molded plastic.
I
Another objective of the present invention is the provision of an improved storage container for liquids wherein an inner tank has a bottom, a side wall and a top molded as one piece and an outer molded tank having a bottom, a side wall, and an upper open mouth for receiving the inner tank.
A further objective of the present invention is the provision of an improved storage container for liquids which is economical to manufacture and durable and safe in use.
These and other objectives will become apparent from the following description of the invention.
SUMMARY OF THE INVENTION
The improved storage container of the present invention includes a molded outer tank having a bottom, a side wall and an upper open mouth, in a molded inner tank having a bottom, a side wall, and a top. The inner tank is separate from the outer tank and can be removably inserted through the open mouth of the outer tank. The outer tank includes a centering bead on the bottom to facilitate alignment of the inner tank within the outer tank.
The top of the inner tank has a horizontal, downwardly facing rim which overlies an upper horizontal shelf or shoulder surrounding the mouth of the outer tank. A seal may be provided between the rim and the shelf. A capillary drip edge is provided on the outer perimeter of the rim of the inner tank to inhibit rain and other liquids from migrating between the rim and the shelf into the space between the outer tank and the inner tank. An indexing tab is provided on the inner tank and registers with a corresponding notch on the outer tank to preclude rotation of the inner tank relative to the outer tank.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of one embodiment of the improved storage container for liquids according to the present invention.
Figure 2 is an exploded view of the container of Figure 1 showing the inner tank separated from the outer tank.
Figure 3 is a sectional view of the tank shown in Figure 1.
Figure 4 is a partially exploded perspective view of a second embodiment of the liquid storage container according to the present invention.
BACKGROUND OF THE INVENTION
Various types of storage containers are well-known for containing liquids, including agricultural chemicals. Some storage containers include double walls which precludes spillage or leakage of the liquid if the outer wall is damaged, such as a puncture, without damage to the interior wall of the container. If there is a leak in the inner tank, the liquid is captured by the outer tank. Some double walled containers are fabricated as a single unit in which the inner and outer walls cannot be separated. Other double wail containers include separate inner and outer tanks which nest together.
However, the structure and manufacture of all these double wall containers is relatively complex, and thus costly.
Accordingly, a primary objective of the present invention is the provision of an improved storage container for liquids having separate inner and outer tanks.
Another objective of the present invention is the provision of an improved storage container for liquids which has a double walled construction.
A further objective of the present invention is the provision of an improved storage container for liquids having an inner tank which can be removably nested within an outer tank.
Still another objective of the present invention is the provision of an improved storage container for liquids having an inner tank which fits into an outer tank, with the outer tank having a centering bead to facilitate installation of the inner tank into the outer tank.
Yet another objective of the present invention is the provision of an improved storage container for liquids wherein an inner tank has a top rim which overhangs an upper shelf or shoulder on the lower tank.
Another objective of the present invention is the provision of an improved storage container having separable nesting inner and outer tanks with means to preclude rotation of the tanks relative to one another when assembled together.
A further objective of the present invention is the provision of an improved storage container for liquids having dual inner and outer tanks which are molded plastic.
I
Another objective of the present invention is the provision of an improved storage container for liquids wherein an inner tank has a bottom, a side wall and a top molded as one piece and an outer molded tank having a bottom, a side wall, and an upper open mouth for receiving the inner tank.
A further objective of the present invention is the provision of an improved storage container for liquids which is economical to manufacture and durable and safe in use.
These and other objectives will become apparent from the following description of the invention.
SUMMARY OF THE INVENTION
The improved storage container of the present invention includes a molded outer tank having a bottom, a side wall and an upper open mouth, in a molded inner tank having a bottom, a side wall, and a top. The inner tank is separate from the outer tank and can be removably inserted through the open mouth of the outer tank. The outer tank includes a centering bead on the bottom to facilitate alignment of the inner tank within the outer tank.
The top of the inner tank has a horizontal, downwardly facing rim which overlies an upper horizontal shelf or shoulder surrounding the mouth of the outer tank. A seal may be provided between the rim and the shelf. A capillary drip edge is provided on the outer perimeter of the rim of the inner tank to inhibit rain and other liquids from migrating between the rim and the shelf into the space between the outer tank and the inner tank. An indexing tab is provided on the inner tank and registers with a corresponding notch on the outer tank to preclude rotation of the inner tank relative to the outer tank.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of one embodiment of the improved storage container for liquids according to the present invention.
Figure 2 is an exploded view of the container of Figure 1 showing the inner tank separated from the outer tank.
Figure 3 is a sectional view of the tank shown in Figure 1.
Figure 4 is a partially exploded perspective view of a second embodiment of the liquid storage container according to the present invention.
Figure 5 is a partial sectional view showing the inner and outer tanks of the container shown in Figure 4 in an assembled state.
Figure 6 is a partially exploded perspective view of the container of Figure 4 showing one of the indexing tabs on the inner tank rim.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In Figures 1-3, a first embodiment of the improved storage container according to the present invention is designated by the reference numeral 10. The container 10 includes and outer tank 12 and an inner tank 14, each of which is molded as a one-piece unit. The outer tank 12 includes a bottom wall 16 and a side wall 18. The upper end of the side wall 18 terminates in a reduced-diameter neck 20 with an upper open mouth 22. A
horizontal shelf or shoulder 24 extends around the perimeter of the mouth 22. A lip 26 extends downwardly from the shelf 24 to provide additional strength and integrity for the shelf 24.
The inner tank 14 includes a bottom wall 28, a side wall 30, and a mushroom-type top 32. The top 32 includes a downwardly facing horizontal rim 34. One or more openings 35 may be provided in the top 32 for introducing and removing liquid to and from the interior of the tank 14. The opening 35 in the top 32 may be covered or closed in any convenient means, such as by a threaded cap. Lifting flanges 36 are formed in the top 32 of the inner tank 14 and are adapted to receive hooks on chains or straps for lifting the inner tank 14 during installation or removal from the outer tank 12.
The bottom wall 16 of the outer tank 12 includes a centering bead 38 which facilitates alignment of the inner tank 14 within the outer tank 12.
Preferably, the bead 38 extends 360 . In Figure 3, the bead 38 is shown to be continuous, though it is understood that the bead may be formed from multiple, disconnected segments extending around the inner tank 14.
In Figures 4-6, a second embodiment of the improved liquid storage container according to the present invention is designated by the reference numeral 1 OA. The container I OA is substantially similar to the container 10, except that the outer tank 12A
does not include the reduced diameter neck 20, as shown in Figures 1-3. An optional seal 40 may be provided for the containers 10, 1 OA between the shelf 24 of the outer tank 12, 12A and the rim 34 of the inner tank 14. The seal 40 may be formed of the appropriate material, such as an adhesive hacked foam, to seal the joint between the shelf 24 and the rim 34. In Figure 5, the seal 40 is shown in a non-compressed state, though it is understood that the weight of the tank 14 and the liquid therein will normally compress the seal 40. As an alternative to the foam ring 40, the seal may be formed by a caulk bead applied to the juncture of the shelf 24 and rim 34.
The inner tank 14 also includes a drip edge 42 on the outer perimeter of the top 32 to inhibit migration of rain or other moisture between the shelf 24 and the rim 34.
Anti-rotation means may also be provided on the tanks 12, 12A and 14 to preclude rotation of the tanks when nested together. For example, as seen in Figure 6, one or more tabs 44 on the rim 34 align or register with corresponding notches 46 on the shelf 24.
When the tabs 44 are received in the notches 46, the inner tank 14 is locked against rotation relative to the outer tank 12, 12A. This anti-rotation lock is useful when a drain fitting is provided between the tank sidewalls 18, 30. It is understood that the tab 44 and notch 46 can be reversed on the shelf 35 and rim 34, respectively.
With the containers 10, 1OA of the present invention, the inner tank 12 may be filled before or after the inner tank 14 is positioned within the outer tank 12, 12A. Thus, the outer tanks 12, 12A may be used with different inner tanks 14. The outer and inner tanks form a double wall construction for the containers 10, 10A so as to protect the contents of the inner tank even if the outer tank is damaged. Also, if the inner tank 14 has a leak, any liquid draining from the inner tank will be captured in the space between the inner tank 14 and the outer tanks 12, 12A, and thereby prevent contamination of the ground or area outside the container 10, 1 OA.
The invention has been shown and described above with the preferred embodiments, and it is understood that many modifications, substitutions, and additions may be made which are within the intended spirit and scope of the invention.
From the foregoing, it can be seen that the present invention accomplishes at least all of its stated objectives.
Figure 6 is a partially exploded perspective view of the container of Figure 4 showing one of the indexing tabs on the inner tank rim.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In Figures 1-3, a first embodiment of the improved storage container according to the present invention is designated by the reference numeral 10. The container 10 includes and outer tank 12 and an inner tank 14, each of which is molded as a one-piece unit. The outer tank 12 includes a bottom wall 16 and a side wall 18. The upper end of the side wall 18 terminates in a reduced-diameter neck 20 with an upper open mouth 22. A
horizontal shelf or shoulder 24 extends around the perimeter of the mouth 22. A lip 26 extends downwardly from the shelf 24 to provide additional strength and integrity for the shelf 24.
The inner tank 14 includes a bottom wall 28, a side wall 30, and a mushroom-type top 32. The top 32 includes a downwardly facing horizontal rim 34. One or more openings 35 may be provided in the top 32 for introducing and removing liquid to and from the interior of the tank 14. The opening 35 in the top 32 may be covered or closed in any convenient means, such as by a threaded cap. Lifting flanges 36 are formed in the top 32 of the inner tank 14 and are adapted to receive hooks on chains or straps for lifting the inner tank 14 during installation or removal from the outer tank 12.
The bottom wall 16 of the outer tank 12 includes a centering bead 38 which facilitates alignment of the inner tank 14 within the outer tank 12.
Preferably, the bead 38 extends 360 . In Figure 3, the bead 38 is shown to be continuous, though it is understood that the bead may be formed from multiple, disconnected segments extending around the inner tank 14.
In Figures 4-6, a second embodiment of the improved liquid storage container according to the present invention is designated by the reference numeral 1 OA. The container I OA is substantially similar to the container 10, except that the outer tank 12A
does not include the reduced diameter neck 20, as shown in Figures 1-3. An optional seal 40 may be provided for the containers 10, 1 OA between the shelf 24 of the outer tank 12, 12A and the rim 34 of the inner tank 14. The seal 40 may be formed of the appropriate material, such as an adhesive hacked foam, to seal the joint between the shelf 24 and the rim 34. In Figure 5, the seal 40 is shown in a non-compressed state, though it is understood that the weight of the tank 14 and the liquid therein will normally compress the seal 40. As an alternative to the foam ring 40, the seal may be formed by a caulk bead applied to the juncture of the shelf 24 and rim 34.
The inner tank 14 also includes a drip edge 42 on the outer perimeter of the top 32 to inhibit migration of rain or other moisture between the shelf 24 and the rim 34.
Anti-rotation means may also be provided on the tanks 12, 12A and 14 to preclude rotation of the tanks when nested together. For example, as seen in Figure 6, one or more tabs 44 on the rim 34 align or register with corresponding notches 46 on the shelf 24.
When the tabs 44 are received in the notches 46, the inner tank 14 is locked against rotation relative to the outer tank 12, 12A. This anti-rotation lock is useful when a drain fitting is provided between the tank sidewalls 18, 30. It is understood that the tab 44 and notch 46 can be reversed on the shelf 35 and rim 34, respectively.
With the containers 10, 1OA of the present invention, the inner tank 12 may be filled before or after the inner tank 14 is positioned within the outer tank 12, 12A. Thus, the outer tanks 12, 12A may be used with different inner tanks 14. The outer and inner tanks form a double wall construction for the containers 10, 10A so as to protect the contents of the inner tank even if the outer tank is damaged. Also, if the inner tank 14 has a leak, any liquid draining from the inner tank will be captured in the space between the inner tank 14 and the outer tanks 12, 12A, and thereby prevent contamination of the ground or area outside the container 10, 1 OA.
The invention has been shown and described above with the preferred embodiments, and it is understood that many modifications, substitutions, and additions may be made which are within the intended spirit and scope of the invention.
From the foregoing, it can be seen that the present invention accomplishes at least all of its stated objectives.
Claims (19)
1. An improved storage container for liquids, comprising:
a molded outer tank having a bottom, a sidewall, and an upper open mouth;
a molded inner tank having a bottom and a sidewall, and a top;
the inner tank having a diameter less than the diameter of the outer tank mouth so that the inner tank removably fits through the mouth of the outer tank; and a bead extending upwardly from the bottom of the outer tank to facilitate centering of the inner tank in the outer tank.
a molded outer tank having a bottom, a sidewall, and an upper open mouth;
a molded inner tank having a bottom and a sidewall, and a top;
the inner tank having a diameter less than the diameter of the outer tank mouth so that the inner tank removably fits through the mouth of the outer tank; and a bead extending upwardly from the bottom of the outer tank to facilitate centering of the inner tank in the outer tank.
2. The improved storage container of claim 1 wherein the bead extends 360°.
3. The improved storage container of claim 1 wherein the bead extends continuously.
4. The improved storage container of claim 1 wherein the inner tank has a top formed as a single piece with the sidewall and the bottom.
5. The improved storage container of claim 1 wherein the outer tank includes a horizontal shelf and the inner tank includes a horizontal rim which overlies the shelf of the outer tank.
6. The improved storage container of claim 8 further comprising a seal between the shelf and the rim.
7. The improved storage container of claim 1 wherein the inner and outer tanks have at least one mating tab and notch to preclude relative rotation of the tanks when nested together.
8. An improved storage container for liquids, comprising:
a molded outer tank having a bottom, a sidewall, and an upper open mouth;
a molded inner tank having a bottom, a sidewall, and a top formed as one piece;
the inner tank having a diameter less than the diameter of the outer tank mouth so that the inner tank removably fits through the mouth of the outer tank;
the inner tank having a horizontal rim between the sidewall and the top;
the outer tank having an upper end with a horizontal shelf, the rim engaging the shelf when the inner tank is nested in the outer tank.
a molded outer tank having a bottom, a sidewall, and an upper open mouth;
a molded inner tank having a bottom, a sidewall, and a top formed as one piece;
the inner tank having a diameter less than the diameter of the outer tank mouth so that the inner tank removably fits through the mouth of the outer tank;
the inner tank having a horizontal rim between the sidewall and the top;
the outer tank having an upper end with a horizontal shelf, the rim engaging the shelf when the inner tank is nested in the outer tank.
9. The improved storage container of claim 8 further comprising a bead extending upwardly from the bottom of the outer tank to facilitate centering of the inner tank in the outer tank.
10. The improved storage container of claim 9 wherein the bead extends 360°.
11. The improved storage container of claim 9 wherein the bead extends continuously.
12. The improved storage container of claim 8 further comprising a seal between the shelf and the rim.
13. An improved storage container for liquids, comprising:
a molded outer tank having a bottom, a sidewall, and an upper open mouth;
a molded inner tank having a bottom, a sidewall, and a top;
the inner tank having a diameter less than the diameter of the outer tank mouth so that the inner tank removably fits through the mouth of the outer tank; and the inner and outer tanks having overlapping horizontal surfaces with mating lock members on the horizontal surfaces to preclude rotation of the tanks.
a molded outer tank having a bottom, a sidewall, and an upper open mouth;
a molded inner tank having a bottom, a sidewall, and a top;
the inner tank having a diameter less than the diameter of the outer tank mouth so that the inner tank removably fits through the mouth of the outer tank; and the inner and outer tanks having overlapping horizontal surfaces with mating lock members on the horizontal surfaces to preclude rotation of the tanks.
14. The improved storage container of claim 13 wherein the lock members include a tab on one tank and a notch on the other tank to receive the tab.
15. The improved storage container of claim 13 wherein the tab extends downwardly from the top of the inner tank and the notch is formed adjacent the mouth of the outer tank.
16. The improved storage container of claim 13 wherein the outer tank includes a horizontal shelf and the inner tank includes a horizontal rim which overlies the shelf of the outer tank.
17. The improved storage container of claim 13 further comprising a bead extending, upwardly from the bottom of the outer tank to facilitate centering of the inner tank in the outer tank.
18. The improved storage container of claim 17 wherein the bead extends 360°.
19. The improved storage container of claim 17 wherein the bead extends continuously.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201113214670A | 2011-08-22 | 2011-08-22 | |
| US13/214670 | 2011-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2787547A1 true CA2787547A1 (en) | 2013-02-22 |
Family
ID=47741378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2787547A Abandoned CA2787547A1 (en) | 2011-08-22 | 2012-08-22 | Double wall storage container for liquids |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2787547A1 (en) |
-
2012
- 2012-08-22 CA CA2787547A patent/CA2787547A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20150611 |