CA1243454A - Inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, and a method for filling same - Google Patents
Inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, and a method for filling sameInfo
- Publication number
- CA1243454A CA1243454A CA000477104A CA477104A CA1243454A CA 1243454 A CA1243454 A CA 1243454A CA 000477104 A CA000477104 A CA 000477104A CA 477104 A CA477104 A CA 477104A CA 1243454 A CA1243454 A CA 1243454A
- Authority
- CA
- Canada
- Prior art keywords
- reservoir
- sheet
- liquid
- peripheral
- inflatable
- 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
Landscapes
- Tents Or Canopies (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, formed from a single sheet of a flexible and fluid tight material defining a bottom supporting thereover the liquid filling the reservoir and a peripheral space formed by the remainder of the sheet folded back on itself inwardly over the whole of its periphery so as to form approximately a tube filled partially with liquid and partially with gas, discontinuous mechanical connection means being provided for connecting the free edge of the folded down remainder of the sheet to the bottom.
An inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, formed from a single sheet of a flexible and fluid tight material defining a bottom supporting thereover the liquid filling the reservoir and a peripheral space formed by the remainder of the sheet folded back on itself inwardly over the whole of its periphery so as to form approximately a tube filled partially with liquid and partially with gas, discontinuous mechanical connection means being provided for connecting the free edge of the folded down remainder of the sheet to the bottom.
Description
-` ~243~5~
TITLE OF THE INVENTION
AN INFLATABLE RESERVOIR FOR CONTAINING A LIQUID, MORE
ESPECIALLY AN INFLATABLE SWIMMING POOL~AND A METHOD FOR
FILLING SAME.
BACKGROUND OF THE INVENTION
1. Fleld of the Invention The present invention relates to improvements 10 to inflatable reservoirs for containing liquids, and more especially to inflatable swimming pools which are made from a flexible and fluidtight material; the invention also relates to a method for filling such a reservoir.
TITLE OF THE INVENTION
AN INFLATABLE RESERVOIR FOR CONTAINING A LIQUID, MORE
ESPECIALLY AN INFLATABLE SWIMMING POOL~AND A METHOD FOR
FILLING SAME.
BACKGROUND OF THE INVENTION
1. Fleld of the Invention The present invention relates to improvements 10 to inflatable reservoirs for containing liquids, and more especially to inflatable swimming pools which are made from a flexible and fluidtight material; the invention also relates to a method for filling such a reservoir.
2. Description of the Prior Art Numerous examples of liquid reservoirs are already known, more especially swimming pools, comprising a peripheral tube inflated by a pressurized gas (generally 20 air),and surrounding a central region intended to contain the liquid (water in the case of swimming pools). Although such reservoirs are particularly advantageous from numerous points of view (low cost, ease of setting up, low weight when empty, ease of storing once deflated, etc...), they 25 have however an important disadvantage which is that thegaS tightness of the peripheral tube is not perfect and this tube deflates gradually (leaks due to the perme-ability of the material and leaks at the filling valve).
The imperfectly inflated tube risks collapsing under 30 the action of the thrust of the liquid, with overspilling of the liquid. It is then necessary to regularly check the inflation condition of the peripheral tube and -to reinflate it periodicallY.
To avoid having to carry out such checks and 35 reinflation at too close intervals, it has already been proposed to cause the inner volume of the peripheral tube to communicate with the liquid filling space of , .
~2~L39~
the reservoir, so that a small amount of liqu:id penetra-tes into the bo-ttom oE the tube. The pressure of the inEl-ation gas of the tube is therefore determined by -the weight of the water column separating the levels of the liquid reigning in the tube and in the central region of the reservoir, and any gas leak is automatically compen-sated for a proportional rise of the level of the liquid in the -tube. The inflation pressure of the tube, without being strictly constant, remains however sufficiently 10 stable over a long period of time to allow the checks to be advantageously spaced apart. One example of such a construction is given in -the ~S patent 2 529 872 (VH
Hasselquist). However, the proposed arrangement is extremely complex and requires numerous cut outs and extensive 15 lengths of welding of the flexible material forming the reservoir. Furthermore, the lateral. thrust exerted by the liquid is compensated for by an inner peripheral reinforcement which is extremely annoying for the users.
The aim of the invention is essentially to 20 provide an inflatable reservoir, more especially a swlmming pool, which combines the respective advantages of the prior reservoirs of the two above mentioned types, but which does not have the respective drawbacks.
To this end, the rese~voir of the invention is formed by a single sheet of said materlal defining:
- a central zone forming the bottom over which 30 is.located the filling liquid of the reservoir, - and a peripheral space formed by the rest of the sheet folded back on itself towards the inside over the whole of its periphery so as to form apprcxlma-tely a peripheral tube partially filled with liquid coming 35 from the filling liquid of the reservoir and partially from gas coming from a filling gas, ~2~39LS~
- discontinuous mechanical connection means being provided for connecting the Eree edge of the folded back remainder of the sheet to the central zone.
Thefact-tha-t the reservoir oE the invention is formed by a single sheet leads to simple and rapid manufacture, using traditional methods and tools; in addition, it is easier to manufacture than prior reservoirs since it comprises no closed pocket; the fixing means and possibly holes provided in certain zones of this 10 sheet are also easy to position and to handle; furthermore, it may be stored away rapidly for there is no longer need to empty air pockets and the sheet is simply folded flat. Thus, the reservoir of the invention has all the advantages of simplicity of manufacture, of use and of 15 storage which conventional inflatable reservoirs offered, to which are added certain additional advantages.
Moreover, the existence of a gap between the peripheral space and the central region of the reservoir provides the advantages of reservoirs of the second above 20 mentioned type.
Still for reasons of simplicity of manufacture and use, the discontinuous mechanical connection means are formed by lacing means.
For increased safety, the reservoir of the 25 invention maypossibly comprise a peripheral safety belt surrounding the tube.
For setting up the reservoir of the invention, the procedure may be as follows:
- the flexible sheet forming the reservoir 30 is spread out on an approximately flat support:
- the peripheral zone of the sheet is folded back inwardly so as to bring the free peripheral edge of the flexible sheet opposite fixing means provided on the periphery of the central zone of the flexible 35 sheet, - the fixing means are secured so as to mechanically ~2~a34~
'I
assemble the free edge of the shee-t to the bottom, - liquid is introduced until the space between the free edge of the sheet and the bottom is covered, - gas is fed into the peripheral space so that this latter assumes approximately the shape of a tube, until excess gas escapes, - filling the reservoir with liquid is completed.
Preferably, filling with gas takes place through a pressurized gas feed tube whose end is fitted between 10 the free edge of the sheet and the bottom.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood from 15 reading thefollowing description of some embodiments given solely by way of non limitative examples. In this description, reference is made to the accompanying drawings in which:
Figure 1 is a schematical cross sectional view 20 oE an inflatable reservoir in accordance with the invention, shown in the position of use;
Figures 2 to 5 are schematical views showing different embodiments of a part of the reservoir of Figure 1, and Figures 6 to 9 are schematical views illustrating the process for setting up the reservoir of Figure 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring first of all to Figure 1, the reservoir of the inventionhas overaIl the general appearance of conventional inflatable reservoirs, that is to say that it is formed by a peripheral tube inflated by a pressurized gas (air as a rule) and sealingly surrounding 35 a central region whose bot-tom supports thereover the liquid reserve.
~ ~2~3~59~
According -to the invention, -the reservoir is formed by a flexible and deformable :Eluid tight shee-t 1 of any known type for the application contemplated.
The flexible sheet 1 is shaped so as to define, on the one hand, a bottom 2 of the reservoir bearing on the ground 3 and supporting thereover the mass 7 of the liquid to be retained and, on -the other hand, a peri.pheral space formed by the rest of the sheet 1 (i.e. the peripheral part of the sheet which surrounds bottom 2) folded back 10 on itself towards the inside along the whole of its periphery.
The free edge 4 of the sheet is connected mechanically by means of connection means 5 to the bo-ttom 2. Thus, the above mentioned peripheral space forms a sort of bell or tube 8 which is not closed at its base and which 15 is partially filled with liquid 9 and partially with gas (air) lO. The pressure of the air imprisoned in the top part of the tube is determined by the weigh-t of the column of liquid of height H between the level of the liquid mass 7 in the reservoir and the level of 20 the liquidrnass 9 in the tube 8.
An external belt 11 may surround tube 8 for safety purposes.
Of course, as shown in Figure 1, it is advan-25 tageous for the peripheral folded down zone of sheet1 not to be connected sealingly with bottom 2, so that a gap 6 remains through which the filling liquid of the reservoir may freely penetrate into tube 8.
It is therefore advantageous for the connection 30 means 5 to provide a discontinuous connection. These means may be of any appropriate type easy to use and handle and inexpensive. Figures 2 to 5 illustrate some examples thereof. .In th~se Figures, the numerical references 2 and 4 have been kept for designating, as in Figure 35 1, the bottom and the edge of the folded down part of the sheet, respectively.
In Figure 2, a ring 12 is fixed by a lug 13
The imperfectly inflated tube risks collapsing under 30 the action of the thrust of the liquid, with overspilling of the liquid. It is then necessary to regularly check the inflation condition of the peripheral tube and -to reinflate it periodicallY.
To avoid having to carry out such checks and 35 reinflation at too close intervals, it has already been proposed to cause the inner volume of the peripheral tube to communicate with the liquid filling space of , .
~2~L39~
the reservoir, so that a small amount of liqu:id penetra-tes into the bo-ttom oE the tube. The pressure of the inEl-ation gas of the tube is therefore determined by -the weight of the water column separating the levels of the liquid reigning in the tube and in the central region of the reservoir, and any gas leak is automatically compen-sated for a proportional rise of the level of the liquid in the -tube. The inflation pressure of the tube, without being strictly constant, remains however sufficiently 10 stable over a long period of time to allow the checks to be advantageously spaced apart. One example of such a construction is given in -the ~S patent 2 529 872 (VH
Hasselquist). However, the proposed arrangement is extremely complex and requires numerous cut outs and extensive 15 lengths of welding of the flexible material forming the reservoir. Furthermore, the lateral. thrust exerted by the liquid is compensated for by an inner peripheral reinforcement which is extremely annoying for the users.
The aim of the invention is essentially to 20 provide an inflatable reservoir, more especially a swlmming pool, which combines the respective advantages of the prior reservoirs of the two above mentioned types, but which does not have the respective drawbacks.
To this end, the rese~voir of the invention is formed by a single sheet of said materlal defining:
- a central zone forming the bottom over which 30 is.located the filling liquid of the reservoir, - and a peripheral space formed by the rest of the sheet folded back on itself towards the inside over the whole of its periphery so as to form apprcxlma-tely a peripheral tube partially filled with liquid coming 35 from the filling liquid of the reservoir and partially from gas coming from a filling gas, ~2~39LS~
- discontinuous mechanical connection means being provided for connecting the Eree edge of the folded back remainder of the sheet to the central zone.
Thefact-tha-t the reservoir oE the invention is formed by a single sheet leads to simple and rapid manufacture, using traditional methods and tools; in addition, it is easier to manufacture than prior reservoirs since it comprises no closed pocket; the fixing means and possibly holes provided in certain zones of this 10 sheet are also easy to position and to handle; furthermore, it may be stored away rapidly for there is no longer need to empty air pockets and the sheet is simply folded flat. Thus, the reservoir of the invention has all the advantages of simplicity of manufacture, of use and of 15 storage which conventional inflatable reservoirs offered, to which are added certain additional advantages.
Moreover, the existence of a gap between the peripheral space and the central region of the reservoir provides the advantages of reservoirs of the second above 20 mentioned type.
Still for reasons of simplicity of manufacture and use, the discontinuous mechanical connection means are formed by lacing means.
For increased safety, the reservoir of the 25 invention maypossibly comprise a peripheral safety belt surrounding the tube.
For setting up the reservoir of the invention, the procedure may be as follows:
- the flexible sheet forming the reservoir 30 is spread out on an approximately flat support:
- the peripheral zone of the sheet is folded back inwardly so as to bring the free peripheral edge of the flexible sheet opposite fixing means provided on the periphery of the central zone of the flexible 35 sheet, - the fixing means are secured so as to mechanically ~2~a34~
'I
assemble the free edge of the shee-t to the bottom, - liquid is introduced until the space between the free edge of the sheet and the bottom is covered, - gas is fed into the peripheral space so that this latter assumes approximately the shape of a tube, until excess gas escapes, - filling the reservoir with liquid is completed.
Preferably, filling with gas takes place through a pressurized gas feed tube whose end is fitted between 10 the free edge of the sheet and the bottom.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood from 15 reading thefollowing description of some embodiments given solely by way of non limitative examples. In this description, reference is made to the accompanying drawings in which:
Figure 1 is a schematical cross sectional view 20 oE an inflatable reservoir in accordance with the invention, shown in the position of use;
Figures 2 to 5 are schematical views showing different embodiments of a part of the reservoir of Figure 1, and Figures 6 to 9 are schematical views illustrating the process for setting up the reservoir of Figure 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring first of all to Figure 1, the reservoir of the inventionhas overaIl the general appearance of conventional inflatable reservoirs, that is to say that it is formed by a peripheral tube inflated by a pressurized gas (air as a rule) and sealingly surrounding 35 a central region whose bot-tom supports thereover the liquid reserve.
~ ~2~3~59~
According -to the invention, -the reservoir is formed by a flexible and deformable :Eluid tight shee-t 1 of any known type for the application contemplated.
The flexible sheet 1 is shaped so as to define, on the one hand, a bottom 2 of the reservoir bearing on the ground 3 and supporting thereover the mass 7 of the liquid to be retained and, on -the other hand, a peri.pheral space formed by the rest of the sheet 1 (i.e. the peripheral part of the sheet which surrounds bottom 2) folded back 10 on itself towards the inside along the whole of its periphery.
The free edge 4 of the sheet is connected mechanically by means of connection means 5 to the bo-ttom 2. Thus, the above mentioned peripheral space forms a sort of bell or tube 8 which is not closed at its base and which 15 is partially filled with liquid 9 and partially with gas (air) lO. The pressure of the air imprisoned in the top part of the tube is determined by the weigh-t of the column of liquid of height H between the level of the liquid mass 7 in the reservoir and the level of 20 the liquidrnass 9 in the tube 8.
An external belt 11 may surround tube 8 for safety purposes.
Of course, as shown in Figure 1, it is advan-25 tageous for the peripheral folded down zone of sheet1 not to be connected sealingly with bottom 2, so that a gap 6 remains through which the filling liquid of the reservoir may freely penetrate into tube 8.
It is therefore advantageous for the connection 30 means 5 to provide a discontinuous connection. These means may be of any appropriate type easy to use and handle and inexpensive. Figures 2 to 5 illustrate some examples thereof. .In th~se Figures, the numerical references 2 and 4 have been kept for designating, as in Figure 35 1, the bottom and the edge of the folded down part of the sheet, respectively.
In Figure 2, a ring 12 is fixed by a lug 13
3~5~
to the bottom 2 whereas two eyelets 14 are formed in the folded down zone in the nelghborhood of edge 4; a lace 14 passes through the eyelets 14 and ring 12, the lace 15 runnlng right round the periphery of tube 8.
In Figure 3, a snap fit linlc 16 is engaged in two lugs 17 and 18 secured to bottom 2 and edge 4 respectively.
In Figure 4, a rigid H shaped piece 19 has its arms engaged respectively in two parts 20 and 21 10 firmly secured to the bottom 2 and edge 4, respectively.
Finally, in Figure 5, one or more rings 22, retained by a lug 23 secured to bot-tom 2 have passing therethrough a lace 24 running through a gusset 25 provided along edge 4.
Setting up of the reservoir of the invention is accomplished as follows:
The flexible sheet 1 is first of all extended on a preferably approximately flat ground surface. Then the peripheral zone of the sheet is folded back inwardly 20 so as to bring edge 4 approximately opposite the fixing means 5 these fixing means are secured so as to assemble edge 4 with bottom 2. If required, the sheet is shaken so that a little air penetrates into the peripheral zone so that it is not completely flattened (Figure 6).
Liquid (for example water) is then poured (at 26) into the central region and penetrates at least partially, through gap 6, into the peripheral portion 8, this filling being continued until the whole of gap 6 (Figure 7) is completely covered.
A pipe 27 is -then fitted into the central zone for example through gap 6, and pressurized air is fed in so as to inflate the peripheral zone and to give it the shape of a tube 8 (figure 8). For example, this operation may be achieved using a simple household vacuum 35 cleaner suitably connected.
Once tube 8 has been given its shape, inflation , ~Z43~54 with air is interrupted and liquid is poured in until the filling is cornplete (Figure 9). The weight of the water column H causes a sufficient pressurization of air 10 to provide -the s-tability of tube 8, the pressure variations due to air leaks being automatically compensated for by a rise in the level of the liquid mass 9 in tube .
As is evident,andas itfollows moreover already from what has gone before, -the invention is in no wise 10 limited to those of its modes of application and embodiments which have been more especially considered; it embraces, on the contrary, all variants thereof.
to the bottom 2 whereas two eyelets 14 are formed in the folded down zone in the nelghborhood of edge 4; a lace 14 passes through the eyelets 14 and ring 12, the lace 15 runnlng right round the periphery of tube 8.
In Figure 3, a snap fit linlc 16 is engaged in two lugs 17 and 18 secured to bottom 2 and edge 4 respectively.
In Figure 4, a rigid H shaped piece 19 has its arms engaged respectively in two parts 20 and 21 10 firmly secured to the bottom 2 and edge 4, respectively.
Finally, in Figure 5, one or more rings 22, retained by a lug 23 secured to bot-tom 2 have passing therethrough a lace 24 running through a gusset 25 provided along edge 4.
Setting up of the reservoir of the invention is accomplished as follows:
The flexible sheet 1 is first of all extended on a preferably approximately flat ground surface. Then the peripheral zone of the sheet is folded back inwardly 20 so as to bring edge 4 approximately opposite the fixing means 5 these fixing means are secured so as to assemble edge 4 with bottom 2. If required, the sheet is shaken so that a little air penetrates into the peripheral zone so that it is not completely flattened (Figure 6).
Liquid (for example water) is then poured (at 26) into the central region and penetrates at least partially, through gap 6, into the peripheral portion 8, this filling being continued until the whole of gap 6 (Figure 7) is completely covered.
A pipe 27 is -then fitted into the central zone for example through gap 6, and pressurized air is fed in so as to inflate the peripheral zone and to give it the shape of a tube 8 (figure 8). For example, this operation may be achieved using a simple household vacuum 35 cleaner suitably connected.
Once tube 8 has been given its shape, inflation , ~Z43~54 with air is interrupted and liquid is poured in until the filling is cornplete (Figure 9). The weight of the water column H causes a sufficient pressurization of air 10 to provide -the s-tability of tube 8, the pressure variations due to air leaks being automatically compensated for by a rise in the level of the liquid mass 9 in tube .
As is evident,andas itfollows moreover already from what has gone before, -the invention is in no wise 10 limited to those of its modes of application and embodiments which have been more especially considered; it embraces, on the contrary, all variants thereof.
Claims (6)
1. An inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, formed from a single sheet of a flexible and fluid tight material defining:
- a central zone forming the bottom supporting thereover the liquid filling the reservoir, - a peripheral space formed by the rest of the sheet folded back on itself inwardly over the whole of its periphery so as to form approximately a peripheral tube, filled partially with liquid coming from the liquid filling the reservoir and partially with gas, coming from a filling gas;
- discontinuous mechanical connection means being provided for connecting the free edge of the folded down remainder of the sheet to the central zone.
- a central zone forming the bottom supporting thereover the liquid filling the reservoir, - a peripheral space formed by the rest of the sheet folded back on itself inwardly over the whole of its periphery so as to form approximately a peripheral tube, filled partially with liquid coming from the liquid filling the reservoir and partially with gas, coming from a filling gas;
- discontinuous mechanical connection means being provided for connecting the free edge of the folded down remainder of the sheet to the central zone.
2. The reservoir as claimed in claim 1, wherein said discontinuous mechanical connection means are formed by lacing means.
3. The reservoir as claimed in claim 1 or 2, wherein, in the functional position, a space exists between the free edge of the folded down remainder of the sheet and said central zone.
4. The reservoir as claimed in claim 1 , further comprising a peripheral safety belt surrounding said tube.
5. A method for setting up an inflatable reservoir, more especially an inflatable swimming pool, such as claimed in claim 1 , in which:
- the flexible sheet forming the reservoir is spread out on an approximately flat support, - the peripheral zone of the sheet is folded back inwardly so as to bring the free peripheral edge of the flexible sheet opposite fixing means provided on the periphery of the central zone of the flexible sheet, - the fixing means are secured so as to mechanically assemble together the free edge of the sheet and the bottom, - liquid is introduced until the space between the free edge of the sheet and the bottom is covered, - gas is introduced into the peripheral space so that this latter assumes approximately the shape of a tube, until the excess gas escapes, - filling the reservoir with liquid is completed.
- the flexible sheet forming the reservoir is spread out on an approximately flat support, - the peripheral zone of the sheet is folded back inwardly so as to bring the free peripheral edge of the flexible sheet opposite fixing means provided on the periphery of the central zone of the flexible sheet, - the fixing means are secured so as to mechanically assemble together the free edge of the sheet and the bottom, - liquid is introduced until the space between the free edge of the sheet and the bottom is covered, - gas is introduced into the peripheral space so that this latter assumes approximately the shape of a tube, until the excess gas escapes, - filling the reservoir with liquid is completed.
6. The method as claimed in claim 5, wherein filling the peripheral space with gas is achieved by introducing the free end of a pressurized air feed pipe between the free edge of the sheet and the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000477104A CA1243454A (en) | 1985-03-21 | 1985-03-21 | Inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, and a method for filling same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000477104A CA1243454A (en) | 1985-03-21 | 1985-03-21 | Inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, and a method for filling same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1243454A true CA1243454A (en) | 1988-10-25 |
Family
ID=4130089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000477104A Expired CA1243454A (en) | 1985-03-21 | 1985-03-21 | Inflatable reservoir for containing a liquid, more especially an inflatable swimming pool, and a method for filling same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1243454A (en) |
-
1985
- 1985-03-21 CA CA000477104A patent/CA1243454A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |