EP0356383B1

EP0356383B1 - Fluid handling tank

Info

Publication number: EP0356383B1
Application number: EP89810567A
Authority: EP
Inventors: Lawrence C. Dull; Patrick T. Jackson
Original assignee: Ciba Geigy AG
Current assignee: Novartis AG
Priority date: 1988-08-02
Filing date: 1989-07-25
Publication date: 1993-07-14
Anticipated expiration: 2009-07-25
Also published as: ES2043094T3; AU621644B2; DE68907534T2; RU1794044C; JPH0285192A; AU3911989A; EP0356383A1; JP2846353B2; UA11085A; AR244639A1; MX171583B; BR8903861A; DE68907534D1; ZA895856B; CA1330057C

Description

The present invention relates to fluid handling systems, and in particular, refillable chemical handling tanks from which chemicals such as herbicides can be delivered.
Known chemical handling tanks from which chemicals, such as herbicides, can be delivered are widely employed throughout the farming industry.
Most conventional chemical handling tanks, such as the ones described in FR-1,490,718 in FR-A-1,573,300, in FR-A-989,334 or in DE-A-2,453,804, when resting on a supporting surface extend vertically and as such, have a relatively high center of gravity. Accordingly, these conventional chemical handling tanks are apt to tip over. Usually to prevent the tanks from tipping over, non-skid pallets adapted to support the tanks are used for stably supporting the tanks.
However, even when the aforementioned chemical tanks are supported on such pallets, another disadvantage associated with their extending generally vertically is that when such pallets are lifted by forklifts during transport of the tanks, the visibility of the forklift operator is impaired by the tanks.
Other known conventional tanks according to the entering clause of claim 1 do extend laterally, such as the ones described in GB-A-1,084,495 or in CH-A-247,891. They comprise a generally hollow body portion with a longitudinal axis for containing fluid therein, and a supporting portion, which is integral with the body portion.The supporting portion includes a base for resting on a supporting surface to support the body portion thereon. The base extends laterally with respect to each side of the longitudinal axis of the body portion. The longitudinal axis extends generally horizontally when the base rests on a supporting surface. These tanks of the prior art also tend to tip over upon just a small accidental tilt.
Finally, a further disadvantage of conventional chemical handling tanks can be that they can not be stacked for storage, especially when full and when respective pumps are connected thereto for delivering the chemicals from the tanks.
Accordingly, it is an object of the present invention to overcome the drawbacks associated with the instability of the conventional chemical handling tanks by providing a liquid handling system, and in particular a chemical handling tank, which is stable when supported and which will not tip over easily.
To achieve the above-described object of the present invention, a chemical handling tank of the present invention has according to the features of claim 1 a generally horizontal configuration with a relatively low center of gravity when resting on a supporting surface via a base portion thereof and tip-over-preventing means for preventing the tank from tipping over when the tank is tilted above the base portion.
In an advantageous manner the drawbacks associated with the requirement of a pallet for transporting the conventional chemical handling tanks can be overcome by providing a chemical handling tank that can easily be transported by chains, straps, cable or the like (hereinafter referred to as flexible hoisting lines) which are readily securable thereto. To achieve this object, the chemical tank has a grooved portion extending therein at each side thereof and in which the flexible hoisting lines are securely received so as to enable the tank to be transported by, for example, hoisting the flexible hoisting lines.
In the furtherance of this object, the chemical handling tank according to the present invention is also designed to facilitate conventional transport thereof by a forklift.
In a further advantageous manner a fluid handling system can be provided that is readily storable and accessible by providing chemical handling tanks that are stackable even when pumps are operatively connected thereto, and in which the pumps are accessible when the tanks are stacked.
To achieve this the chemical handling tanks each can have at least one groove open, at a respective location to the underside of the tank and a rib projecting from the top of the tank above each said respective location. Therefore, when two tanks are stacked, each rib of the lower tank extends into the groove open at the underside of the upper tank whereby the tanks are nested securely. Furthermore, each rib of the tank extends from a supporting portion of the tank formed on the top of the tank. The supporting portion can have a central recess at the bottom of which is located a pump mounting assembly through which a pump can deliver fluid from the tank. The pump can be entirely received in the central recess so as not to create any interference when the tanks are stacked. Furthermore, at least one respective side recess extends between the central recess and a side of the tank so that the pump may be accessed through the side recess when the tanks are stacked.
The present invention, advantages and further developments thereof, will be better understood by those of ordinary skill in the art after reviewing the following detailed description of the preferred embodiments of the present invention referring to the accompanying drawings, in which:

Figure 1 is a perspective view of a first embodiment of a chemical handling tank according to the present invention illustrating alternative transport modes thereof;
Figure 2 is a top view of the first embodiment of the present invention;
Figure 3 is a front view of the first embodiment;
Figure 4 is an end view of the first embodiment;
Figure 5 is a top view of a second embodiment of a chemical handling tank according to the present invention;
Figure 6 is a front view of the second embodiment;
Figure 7 is an end view of the second embodiment; and
Figure 8 is a schematic diagram of the present invention illustrating a pump operatively connected thereto.

It is to be noted that throughout the drawings, like reference numerals refer to like elements.
Referring now the drawings, and in particular to Figs. 1-4 illustrating a first embodiment of a chemical handling tank according to the present invention, the chemical handling tank comprises a hollow body portion generally indicated at 1 and a supporting portion 2 integral with the body portion.
As seen in Figs. 1 and 4, the supporting portion 2 includes a base 3a, 3b which rests on a supporting surface to support the body portion 1 thereon. The base 3a, 3b extends laterally with respect to and to each side of the longitudinal axis of the hollow body portion 1. Furthermore, the supporting portion 2 includes a respective tip-over-preventing portion 4a, 4b that extends laterally with respect to the longitudinal axis of the body portion from the base 3a, 3b and at a predetermined angle Θ from the base 3a, 3b, respectively. In the preferred embodiment, as shown in Figs. 4 and 7, angle Θ is 90°. The function of each tip-over-preventing portion 4a, 4b is to prevent the tank from tipping over when the tank is tilted laterally about the base 3a, 3b while resting on the supporting surface by coming into contact with the supporting surface.
The angle Θ and the lateral extent of each tip-over-preventing portion 4a, 4b is selected so that two recesses Z defined between the tip-over-preventing- portions 4a, 4b and the base 3a, 3b are able to accommodate the fork (illustrated by phantom lines in Fig. 1) of a forklift therein and so that the tip-over-preventing portions adequately prevent the tank from being tipped over.
Also, as is clear from Fig. 3, the tank has a relatively low center of gravity. In other words, the center of gravity is located at a predetermined distance from the supporting surface that is less than half the length of the tank as taken along the longitudinal axis of the body portion. Accordingly, the chemical handling tank of the present invention is relatively stable when full and is very difficult to tip over due to the aforementioned tip-over-preventing portions 4a, 4b.
According to the specific construction of the chemical handling tank according to the first embodiment of the present invention, the base 3a, 3b comprises a pair of base portions 3a, 3b and 3a, 3b spaced apart from one another along the longitudinal axis of the body portion while respective tip-over-preventing portions 4a and 4b extend from each of the base portions 3a, 3b and 3a, 3b on each side of the longitudinal axis, respectively. The chemical handling tank can comprise polyethylene and may have either a 110 gallon or 140 gallon capacity.
The chemical handling tank according to the present invention is also "farmer hoistable" meaning that it can be lifted with flexible hoisting line 10 fitted around the tank in the manner shown in Fig. 1. More specifically, the supporting portion 2, and in particular each tip-over-preventing portion 4a, 4b, has at least one groove 5 extending therein and open to a respective side of the tank whereby at least one grooved portion extends on each side of the tank for securely receiving the flexible hoisting line 10 to allow the tank to be transported thereby.
Again, according to the specific construction of the present invention, and specifically referring to Fig. 2, the supporting portion has a pair of grooves 5, 5 extending therein adjacent each of the ends 1a, 1b of the hollow body portion. Each of the pair of grooves 5, 5 is located on a respective side of the tank and extends in a plane generally perpendicular to the longitudinal axis of the hollow body portion 1 of the tank. Referring now to Fig. 4, at least a portion of each of the grooves 5 has the bottom thereof defined by respective surfaces 2a of the supporting portion that extend inwardly toward the underside of the tank and obliquely with respect to the longitudinal axis of the hollow body portion. Such a construction allows the tank to be lifted in a cradle-like manner by the flexible hoisting line fitted therein.
And, as briefly mentioned above, the recesses Z provide locations at which a fork of a forklift may support the tank to transport the same. More specifically, the fork may be inserted into the recesses Z in a direction y while the tank rests on a supporting surface when the tank is to be transported as an alternative to hoisting the tank with flexible hoisting line 10.
Accordingly, it is seen that the supporting portion 2, in addition to having the base 3a, 3b and the tip-over-preventing portion 4a, 4b which contribute to the stability of the tank, also facilitates the transport of the tank due to the transport grooves 5 extending therein.
The supporting portion 2 also facilitates nesting of the tanks when the tanks are stacked. In this respect, according to the first embodiment of the present invention, the grooves 5 extending in the supporting portion 2 are each open, at a respective location 5a as illustrated in Fig. 4, to the underside of the tank. Respective ribs 7 project from an upper portion 6 of the supporting portion 2 directly above each respective location 5a. Each groove 5 has a width at said respective location 5a that is approximately the same as the width of the respective rib 7 extending thereabove. Accordingly, when respective ones of the tanks are stacked, each rib of a lower one of the stacked tanks extends into a respective groove 5 of an upper one of the stacked tanks whereby the tanks are securely nested when stacked.
The second embodiment of the present invention as shown in Figs. 5-7 is essentially the same as the first embodiment except that while the ribs 7 in the first embodiment extend into grooves open to the underside of the tank at locations 5a that are disposed lateral to each base portion 3a, 3b, the ribs 17 of the second embodiment of the present invention extend into respective grooves 15a that are formed in the base portions 3a, 3b and 3a, 3b. Accordingly, as is quite evident from Figs. 5-7, when the tanks of the second embodiment are to be stacked, each respective rib 17 extends into a groove 15a thereby securely nesting the tanks when the tanks are stacked.
The chemical handling tanks according to the embodiments of the present invention also include a pump mounting assembly 8 extending in the top of the body portion 1 and through which the liquid contained in the tank can be delivered therefrom by a pump 12 (Fig. 8).
The supporting portion 2 has a central recess 9a (Figs. 2, 5 and 8) at the bottom of which the pump mounting assembly 8 is exposed. The pump 12, when operatively connected to the pump mounting assembly 8, can be entirely received within the central recess 9a so as not to extend above the upper portion 6 of the supporting portion 2. Accordingly, when the tanks are stacked, as is quite clear from Fig. 8, the pumps 12 can remain operatively connected to the pump mounting assembly 8. It is to be noted in Fig. 8 that reference numeral 8a refers to an adaptor assembly of the pump while reference numeral 13 refers to a stand pipe through which liquid is drawn from the tank by the pump.
Furthermore, the supporting portion 2 has at least one respective side recess 9b extending between the central recess 9a and a respective side of the body portion 1 of the tank. When the tanks are stacked in the above-mentioned manner with the pump of the lowermost tank operatively connected to the pump mounting assembly 8 via the adaptor assembly 8a, the pump can be accessed through the side recess 9b.
Finally, the chemical handling tank of the present invention can be refilled through a removable bung 11.

Claims

A fluid handling tank comprising:
a generally hollow body portion (1), for containing fluid therein, and a supporting portion (2), integral with said body portion (1),
said hollow body portion (1) having a longitudinal axis,
said supporting portion (2), including a base (3a, 3b) for resting on a supporting surface to support said body portion (1) thereon, said base (3a, 3b) extending laterally with respect to each side of said longitudinal axis of said body portion (1),
the longitudinal axis of said body portion (1) extending generally horizontally when the base (3a, 3b) rests on the supporting surface,
characterized in that:
said base (3a, 3b) comprises on each side of said longitudinal axis a vertical side, which extends generally perpendicular to a lower face of said base (3a, 3b) resting on a supporting surface,
said supporting portion (2) comprises on each side of said longitudinal axis a tip-over-preventing portion (4a; 4b), each of which has a lower side which is inclined with respect to the adjacent vertical side of the base (3a; 3b) by an angle Θ and extends laterally such that a recess (Z) is defined between each tip-over-preventing portion (4a, 4b) and the adjacent base (3a, 3b), which is capable of accomodating a fork of a fork lift therein, each said tip-over-preventing portion (4a, 4b) for preventing the tank from tipping over when the tank is tilted laterally with respect to said longitudinal axis about said base (3a, 3b) while resting on the supporting surface by coming into contact with the supporting surface as the tank is tilted, and
said tank has a center of gravity that is located at a distance above the supporting surface that is less than half the length of the tank as taken along said longitudinal axis of said body portion (1).
A fluid handling tank as claimed in claim 1,
wherein said base (3a, 3b) comprises a pair of base portions spaced apart from one another in a direction extending along said longitudinal axis of said body portion (1), said base portions (3a, 3b ; 3a, 3b) each extending laterally with respect to and to each side of said longitudinal axis of said body portion (1), and
a said respective tip-over-preventing portion (4a, 4b) extends from each of said base portions (3a, 3b) on each side of said longitudinal axis.
A fluid handling tank as claimed either in claim 1 or in claim 2, wherein the tank including said body portion (1) and said supporting portion (2) comprises polyethylene.
A fluid handling tank as claimed in any one of the preceding claims, wherein each said angle (Θ) is 90°.
A fluid handling tank as claimed in any one of the preceding claims, wherein each said respective tip-over-preventing portion (4a, 4b) has at least one groove (5) extending therein and open to a respective side of the tank for defining at least one grooved portion on each side of the tank in which a flexible hoisting line (10) can be securely fitted around the tank to allow the tank to be transported.
A fluid handling tank as claimed in claim 5,
wherein each said groove (5) is open to the underside of the tank at a respective location (5a) adjacent said base (3a, 3b), and further comprising a respective rib member (7) projecting from the top (6) of the tank above each said respective location (5a), each said groove (5) having a width approximately the same as the width of the rib (7) extending thereabove whereby when respective ones of the tanks are stacked, said ribs (7) of a lower one of the stacked tanks extend into the grooves (5) of an upper one of the stacked tanks, respectively.
A fluid handling tank as claimed in any one of the preceding claims, wherein each said respective tip-over-preventing portion (4a, 4b) has two parallel grooves (5) extending therein and open to a respective side of the tank for defining at least one grooved portion comprising said two parallel grooves on each side of the tank in which flexible hoisting line (10) can be securely fitted around the tank to allow the tank to be transported.
A fluid handling tank as claimed in claim 6, wherein said supporting portion (2) has a central recess (9a) therein, which is located on the side of the body portion (1) which is opposite the location of the base (3a, 3b), at the bottom of which a pump mounting assembly (8) is exposed such, that a pump (12) is received entirely within said recess (9a) so as not to extend above an upper portion (6) of the supporting portion (2), and further wherein said supporting portion (2) has at least one respective side recess (9b) extending therein between said central recess (9a) and a respective side of said body portion (1) for allowing access to the pump (12) when it is operatively connected to said pump mounting assembly (8) in the central recess (9a) of a lower one of the tanks, when they are stacked.
A fluid handling tank as claimed in any one of claims 1 to 4,
wherein said supporting portion (2) has a pair of grooves (15a) extending therein adjacent each of said ends of said hollow body portion (1), each of said pair of grooves (15a) located on a respective one of said sides of said tank and extending in a plane perpendicular to said longitudinal axis, wherein each of said grooves (15a) is open to the underside of the tank at a respective location, and further comprising a respective rib (17) projecting from the top of the tank above each said respective location, each of said grooves (15a) having a width approximately the same as the width of the rib (17) extending thereabove whereby when respective ones of the tanks are stacked, said ribs (17) of a lower one of the stacked tanks extend into the grooves (15a) of an upper one of the stacked tanks, respectively.