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EP 1 143 191 B1 |
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EUROPEAN PATENT SPECIFICATION |
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Mention of the grant of the patent: |
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04.07.2007 Bulletin 2007/27 |
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Date of filing: 27.04.2000 |
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International Patent Classification (IPC):
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Full jacket gas cylinder
Volle Auskleidung für Gaszylinder
Enveloppe intégrale pour cylindre à gaz
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Designated Contracting States: |
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AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
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Priority: |
09.02.2000 US 181316 P 26.04.2000 US 558535
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Date of publication of application: |
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10.10.2001 Bulletin 2001/41 |
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Proprietor: Amtrol Inc. |
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West Warwick
Rhode Island 02893 (US) |
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Inventors: |
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- Chohfi, William
4100 Porto (PT)
- Veiga Dias, Jose
4200 Porto (PT)
- Portocarrero, Jose
4480 Maceira da Maia -Villa Do Conde (PT)
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Representative: Lloyd, Patrick Alexander Desmond |
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Reddie & Grose
16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB) |
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References cited: :
EP-A- 0 805 302 US-A- 5 335 954
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FR-A- 2 716 951
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Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
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Cross Reference to Related Applications
Background of the Invention
[0002] This invention relates to gas cylinders, and more particularly to an improved protective
device for gas cylinders. Such a device is known from
FR-A-2 716 951.
[0003] Known designs for gas cylinder protectors comprise top and bottom steel rings welded
to the resistant part of a gas cylinder. While the top ring acts as a valve protection
device and has built in handles for carrying purposes, the bottom ring acts as a stand.
[0004] Typically, gas cylinders are intended for multiple uses within a deposit and return
system. In order for a gas cylinder to be reprocessed the welded top and bottom rings
may have to be separated during maintenance of the gas cylinder. Generally, in accordance
with the laws of the country of usage, maintenance and re-testing operations are required
every ten to fifteen years. Meanwhile, the cylinder is periodically checked when it
arrives at the filling station to be refilled. This checking may occur three or four
times a year. In accordance with the findings of this checking, it may be decided
that the gas cylinder be refurbished. In known designs, the body of the gas cylinder
is often damaged in this separation process, causing the entire unit to be scrapped.
[0005] Moreover, while the top ring and the bottom ring provide protection to the valve
and the bottom part of the gas cylinder, respectively, the sides of the gas cylinder
are still left exposed to various environmental conditions that may detrimentally
affect the gas cylinder. A further disadvantage of the steel rings is its relative
weight.
[0006] During its life cycle, gas cylinders are typically refilled several times and exposed
to mechanical and chemical aggressions, mostly due to poor handling and severe storage
conditions. Exposures of these kinds may cause mechanical deformation and rust leading
to dangerous conditions.
[0007] Accordingly, steel cylinders are periodically submitted to legally enforced visual
inspection and hydraulic pressure testing aimed at the steel resistant container.
Depending on the level of damage detected, cylinders may either be scraped or submitted
to refurbishment operations that may include the replacement of either the top or
the bottom ring or both. As mentioned earlier, the body of the gas cylinder is often
damaged in this replacement process, causing the entire unit to be scrapped.
[0008] Some known protector designs attempt to address the excessive weight problem associated
with steel rings welded to the top and bottom of gas cylinders by molding a synthetic
mold onto the: gas cylinder such that the mold is intimately linked to the gas cylinder,
thereby enclosing the gas cylinder. Although, the resulting protector is lighter than
one having steel rings welded to the top and bottom of gas cylinders, this proposed
solution, however, prevents the steel resistant part of the gas cylinders from visual
inspection without major damage to the steel cylinder; this is so because removal
of the molded plastic material linked to the steel cylinder is almost impossible without
causing major damage to the steel cylinder.
[0009] Furthermore, although molding a synthetic onto the gas cylinder provides protection
to the gas cylinder against shock, it does so at the expense of affecting the needed
heat exchange from the environment to the liquified gas within the gas cylinder.
[0010] As would be appreciated from the above, it is important to provide a protective device
for gas cylinders that protects the body of the gas cylinder from damage while being
light.
[0011] In view of the foregoing, it is an object of the invention to provide a protective
device for gas cylinders that protects the body of the gas cylinder from damage while
being light.
[0012] It is another object of the invention to provide a protective device for gas cylinders
that protects the body of the gas cylinder from damage, is light and allows for visual
inspection of the gas cylinder without damaging the gas cylinder.
[0013] It is another object of the invention to provide a protective device for gas cylinders
that protects the body of the gas cylinder from damage, is light and does not affect
the required heat exchange from the environment to the liquified gas within the gas
cylinder.
[0014] It is another object of the invention to provide a protective device for gas cylinders
that protects the body of the gas cylinder from damage, is light, does not affect
the required heat exchange from the environment to the liquified gas within the gas
cylinder and renders the gas cylinder assembly easier to stack for safe storage.
[0015] It is another object of the invention to provide a protective device for gas cylinders
having ergonomic grips in the top part for handling purposes.
Summary of the Invention
[0016] These and other objects of the invention are accomplished in accordance with the
principles of the invention by providing a full jacket protective device for gas cylinders
that protects the body of the gas cylinder from damage, is light, allows for visual
inspection of the gas cylinder without causing damage to the gas cylinder, does not
affect the required heat exchange from the environment to the liquified gas within
the gas cylinder and renders the gas cylinder assembly easier to stack for safe storage.
[0017] In accordance with the principles of the invention, the full jacket protective device
for gas cylinders is provided which provides protection against shock to the steel
container and valve and incorporates the functional features of the stand (bottom
ring) and the handle (top ring) of the resistant steel part.
[0018] The full jacket protective device built in accordance with the principles of the
invention encloses the gas cylinder, thereby providing protection against shock and
direct damage to the entire body of the gas cylinder and the valve without affecting
the needed heat exchange from the environment to the liquefied gas within the steel
part.
[0019] The protective device in accordance with the principles of the invention comprises
a top part and a bottom part forming a cavity within which the gas cylinder is placed.
In accordance with an illustrative embodiment of the invention, the top part and bottom
part are both made of synthetic materials and are interconnected during assembling
process by a standard functional clipping device. These clippings may be broken in
order for the protective device to be removed, allowing visual inspection of the gas
cylinder without damaging the gas cylinder in the removal process. After inspection,
a new protective device can be easily assembled.
[0020] Furthermore, in an illustrative embodiment, the geometrical design of the top and
bottom parts is such that the points at which the protective device makes contact
with the body of the gas cylinder is minimized. In accordance with an illustrative
embodiment of the invention, this is accomplished by having the walls of the top part
and the bottom part wave apart from the wall of the gas cylinder enclosed, thereby
generating channels that avoid heat insulation and contribute to absorb shock.
Brief Description of the Drawings
[0021]
FIG. 1 is a perspective view of a full jacket protective device according to the present
invention.
FIG. 2 is a view similar to that shown in FIG. 1, but focusing on the bottom part
of the full jacket protective device according to the present invention.
FIG. 3 is a view similar to that shown in FIG. 1, but focusing on the top part of
the full jacket protective device according to the present invention.
FIG. 4 is a sectional perspective view of the bottom part of the full jacket protective
device showing a clipping system according to the present invention.
FIG. 5 is a sectional perspective view of the full jacket protective device enclosing
a gas cylinder according to the present invention.
FIG. 6 is a perspective view of an handle made in accordance with an illustrative
embodiment of the present invention.
FIG. 7 is a perspective view of an handle made in accordance with another illustrative
embodiment of the present invention.
FIG. 8 is yet another perspective view of the handle shown in FIG. 7 according to
the present invention.
FIG. 9 is yet another perspective view of the handle shown in FIG. 7 according to
the present invention.
FIG. 10 is an elevation view showing stacking of two cylinders having handles of the
kind shown in FIG. 7.
Detailed Description of the Preferred Embodiments
[0022] FIG. 1 is a perspective view of a full jacket protective device according to the
present invention. Full jacket protective device 100 comprises of top part 105 and
bottom part 110, respectively. Top part 105 has coupled to it ergonomic handles 107
for carrying the enclosed gas cylinder. After a gas cylinder is enclosed by top part
105 and bottom part 110, top part 105 and bottom part 110 are coupled together during
assembly process by a standard functional clipping device. This process ensures that
the gas cylinder is held securely in place and the full jacket protective device does
not come apart.
[0023] As evident from FIG. 1, top part 105 and bottom part 110 have a wave-like structure.
This wave-like structure ensures that the full jacket protective device encloses the
gas cylinder, thereby protecting it against damage from shock without affecting the
needed heat exchange from the environment to the liquified gas within the gas cylinder.
[0024] A specific problem encountered during longer consumption periods of gas is that the
gas cylinder cools down to an extent that a drop in pressure is experienced due to
inadequate evaporation of the liquefied gas. The wave-like shape of the full jacket
protective device built in accordance with the principles of the invention addresses
this problem. The wave-like shape ensures maximum exposure of the gas cylinder wall
to atmospheric conditions, minimizing insulating materials between the gas cylinder
and the environment and generating a convection driven air flow against the gas cylinder
walls which contributes to the rate of exchange of thermal energy.
[0025] Also shown in FIG. 1 are apertures 115 in bottom part 110 of full jacket protective
device 100 for facilitating air flow even when the gas cylinder and the full jacket
protective device are placed on ground or are stacked. Apertures 115 are more readily
visible in FIG. 2.
[0026] FIG. 3 provides a view of apertures 115 when seen from top part 105 of full jacket
protective device 100. Also shown in FIG. 3 is the access to the valve through an
opening in top part 105 and stacking lips 305 used to stack one protective assembly
housing a gas cylinder on top of another similar full jacket protective device.
[0027] FIG. 4 is a sectional perspective view of the bottom part of the full jacket protective
device showing a clipping system according to the present invention. Shown in FIG.
4 is a simplified representation of clipping system 405 used to secure top part 105
and bottom part 110 of full jacket protective device together to hold a corresponding
gas cylinder in place. Although only one such clipping system is shown in FIG. 4,
it will be understood that more than one of such clipping system may be displaced
along the upper perimeter of bottom part 110 and the corresponding of top part 105.
The clipping device of the clipping system can be destroyed to remove the protective
device off the gas cylinder, allowing for visual inspection of the gas cylinder without
damaging the steel cylinder. After visual inspection of the gas cylinder, a new protective
device with intact clipping devices can be easily assembled in order to protect the
gas cylinder.
[0028] It will be also understood that other means of clipping upper part 105 and bottom
part 110 can be employed. In a preferred embodiment made in accordance with the principles
of the invention top part 105 and bottom part 110 are clipped together by at least
5 clipping systems.
[0029] Shown in FIG. 5 is a sectional perspective view of the full jacket protective device
enclosing gas cylinder 505 according to the present invention. Also shown in FIG.
5 is the sectional view of two clipping systems 405 in accordance with the principles
of the invention.
[0030] Shown in FIG. 6 is a perspective view of handle 605 made in accordance with an illustrative
embodiment of the present invention.
[0031] Shown in FIG. 7 is a perspective view of an handle made in accordance with another
illustrative embodiment of the present invention. Handle 705 resembles rabbit ears
in appearance. Handle 705 is uniquely secured to a welded metal portion (not shown)
welded onto the top portion of the gas cylinder. Handle 705 provides ergonomic grips
for handling purposes. It will be appreciated that an ergonomic design of the handle
is very desirable in that it assists in the transportation of the gas cylinder.
[0032] Similarly, it will also be appreciated that a comfortable grip would additionally
assist in the efficient handling of the gas cylinder. Thus, in accordance with the
principles of this invention, the surface of handle 705 that makes contact with a
user's hands during lifting of the gas cylinder is constructed of a soft and cushy
pliable material, e.g., rubber. This feature of the invention can be achieved using
standard molding techniques, e.g., double injection molding. It will, however, be
understood that handle 705 may also be constructed such that the soft and cushy pliable
material may only be present in the lower gripping part of handle 705, or any other
desirable part of handle 705.
[0033] FIGS. 8 and 9 also illustrate perspective views of the handle shown in FIG. 7 according
to the present invention. As illustrated in FIG. 9. handle 705 is bolted to welded
metal portion (not shown) by bolting device 910. The welded portion, in turn, is welded
onto the top portion of the gas cylinder. In a preferred embodiment, there are two
handles secured to respective pairs of welded metal portions.
[0034] FIG. 10 is an elevation view showing stacking of two cylinders 950 and 980, respectively,
having handles of the kind shown in FIGS. 7, 8 and 9. As illustrated in FIG. 10, bottom
part 955 of the protective device is constructed in order to accommodate rabbit ears
705 of the cylinder beneath, when one cylinder is stacked on top another. It will,
however, be understood that bottom part 955 of a protective device built in accordance
with the principles of this inventions can be configured to accommodate handles of
different configurations to facilitate stacking of cylinders.
1. A protective device (100) for housing a gas cylinder comprising:
a top part having (105) an upper opening and a lower opening; and
a bottom part (110) having an upper opening and a lower opening, said upper opening
of the bottom part (110) removably coupled to the lower opening of the top part (105)
enclosing the gas cylinder, wherein area external to the upper opening of the top
part (105) is in fluid communication with area external to the lower opening of the
bottom part (110) while the gas cylinder is enclosed.
2. The protective device of claim 1 wherein the top part (105) has a substantially cylindrical
body having an inner wave-like surface with longitudinally oriented contact surfaces
that make contact with the gas cylinder's body, said contact surfaces are interposed
between longitudinally oriented non-contacting surfaces, wherein said longitudinally
oriented contact surfaces and said longitudinally oriented non-contacting surfaces
collectively form the inner wave-like surface.
3. The protective device of claim 1 or 2 wherein the top part (105) has an inwardly tapering
portion having circumferentially dispersed openings for providing, fluid communication
between area interior to the protective device and area external to the protective
device.
4. The protective device of claim 3. wherein the inwardly tapering portion allows access
to handles (107, 605, 705) mounted on the gas cylinder.
5. The protective device of any preceding claim wherein the bottom part (110) has a substantially
cylindrical body having an inner wave-like surface with longitudinally oriented contact
surfaces that make contact with the gas cylinder's body, said contact surfaces are
interposed between longitudinally oriented non-contacting surfaces, wherein said longitudinally
oriented contact surfaces and said longitudinally oriented non-contacting surfaces
collectively form the inner wave-like surface.
6. The protective device of claim 5 wherein said contact surfaces and said non-contacting
surfaces of the bottom part (110) are in alignment with corresponding surfaces of
the top part (105) when the lower opening of the top part is removably coupled to
the upper opening of the bottom part enclosing the gas cylinder.
7. The protective device of any preceding claim wherein the bottom part (110) has a base
portion having circumferentially dispersed openings (115) for providing fluid communication
between area internal to the protective device and area external to the protective
device, said fluid communication provided by passage of air between the circumferentially
dispersed openings of the top part and the circumferentially dispersed openings: of
the bottom part through the non-contacting surfaces.
8. The protective device of claim 7 wherein the base portion has an inwardly projecting
groove portion.
9. The protective device of any preceding claim wherein the top part has an outwardly
projecting lip portion (705).
10. The protective device of claim 8 wherein the lip portion of the top part (105) is
configured to conform to the inwardly projecting groove portion of the base portion
(110) allowing stacking of gas cylinders.
11. The protective device of any preceding claim wherein the bottom part is configured
to accommodate handles (105, 605, 705) mounted on gas cylinders while stacking cylinders.
12. The protective device of any preceding claim wherein said top part (105) and said
bottom part (110) comprise synthetic materials.
13. The protective device of any preceding claim wherein the lower opening of the top
part (105) is removably coupled to the upper opening of the bottom part (110) using
a clipping device (405).
1. Schutzvorrichtung (100) zum Aufnehmen eines Gaszylinders, umfassend:
einen oberen Teil (105) mit einer oberen Öffnung und einer unteren Öffnung; und
einen unteren Teil (110) mit einer oberen Öffnung und einer unteren Öffnung, wobei
die genannte obere Öffnung des unteren Teils (110) entfernbar mit der unteren Öffnung
des oberen Teils (105), den Gaszylinder einschließend, verbunden ist, wobei der zur
oberen Öffnung des oberen Teils (105) äußere Bereich in Fluidkommunikation mit dem
zur unteren Öffnung des unteren Teils (110) äußeren Bereich steht, während der Gaszylinder
eingeschlossen ist.
2. Schutzvorrichtung nach Anspruch 1, bei der der obere Teil (105) einen im Wesentlichen
zylindrischen Körper hat, der eine innere wellenartige Oberfläche mit längs ausgerichteten
Kontaktflächen hat, die den Körper des Gaszylinders berühren, wobei die genannten
Kontaktflächen zwischen längs ausgerichteten kontaktlosen Oberflächen angeordnet sind,
wobei die genannten längs ausgerichteten Kontaktflächen und die genannten längs ausgerichteten
kontaktlosen Oberflächen zusammen die innere wellenartige Oberfläche bilden.
3. Schutzvorrichtung nach Anspruch 1 oder 2, bei der der obere Teil (105) einen einwärts
sich verjüngenden Abschnitt hat, der am Umfang verteilte Öffnungen hat zum Bereitstellen
von Fluidkommunikation zwischen dem zur Schutzvorrichtung inneren Bereich und dem
zur Schutzvorrichtung äußeren Bereich.
4. Schutzvorrichtung nach Anspruch 3, bei der der sich nach innen verjüngende Abschnitt
Zugriff auf am Gaszylinder angebrachte Griffe (107, 605, 705) zulässt.
5. Schutzvorrichtung nach einem der vorhergehenden Ansprüche, bei der der untere Teil
(110) einen im Wesentlichen zylindrischen Körper hat, der eine innere wellenartige
Oberfläche mit längs ausgerichteten Kontaktflächen hat, die den Körper des Gaszylinders
berühren, wobei die genannten Kontaktflächen zwischen längs ausgerichteten kontaktlosen
Oberflächen angeordnet sind, wobei die genannten längs ausgerichteten Kontaktflächen
und die genannten längs ausgerichteten kontaktlosen Oberflächen zusammen die innere
wellenartige Oberfläche bilden.
6. Schutzvorrichtung nach Anspruch 5, bei der die genannten Kontaktflächen und die genannten
kontaktlosen Oberflächen des unteren Teils (110) mit entsprechenden Oberflächen des
oberen Teils (105) fluchten, wenn die untere Öffnung des oberen Teils entfernbar mit
der oberen Öffnung des unteren Teils, den Gaszylinder einschließend, verbunden ist.
7. Schutzvorrichtung nach einem der vorhergehenden Ansprüche, bei der der untere Teil
(110) ein Unterteil hat, das am Umfang verteilte Öffnungen (115) zum Bereitstellen
von Fluidkommunikation zwischen dem zur Schutzvorrichtung inneren Bereich und dem
zur Schutzvorrichtung äußeren Bereich hat, wobei die genannte Fluidkommunikation durch
Hindurchströmen von Luft zwischen den am Umfang verteilten Öffnungen des oberen Teils
und den am Umfang verteilten Öffnungen des unteren Teils durch die kontaktlosen Oberflächen
bereitgestellt wird.
8. Schutzvorrichtung nach Anspruch 7, bei der das Unterteil einen einwärts vorspringenden
Nutenabschnitt hat.
9. Schutzvorrichtung nach einem der vorhergehenden Ansprüche, bei der der obere Teil
einen nach außen vorspringenden Lippenabschnitt (705) hat.
10. Schutzvorrichtung nach Anspruch 8, bei der der Lippenabschnitt des oberen Teils (105)
dem einwärts vorspringenden Nutenabschnitt des Unterteils (110) entsprechend konfiguriert
ist, was das Stapeln von Gaszylindern zulässt.
11. Schutzvorrichtung nach einem der vorhergehenden Ansprüche, bei der der untere Teil
zum Aufnehmen von an Gaszylindern angebrachten Griffen (105, 605, 705) konfiguriert
ist, was das Stapeln von Gaszylindern ermöglicht.
12. Schutzvorrichtung nach einem der vorhergehenden Ansprüche, bei der der genannte obere
Teil (105) und der genannte untere Teil (110) Kunststoffe umfassen.
13. Schutzvorrichtung nach einem der vorhergehenden Ansprüche, bei der die untere Öffnung
des oberen Teils (105) durch eine Klammervorrichtung (405) entfernbar mit der oberen
Öffnung des unteren Teils (110) verbunden ist.
1. Dispositif de protection (100) destiné à recevoir une bonbonne de gaz comprenant :
une partie supérieure (105) comportant une ouverture supérieure et une ouverture inférieure
; et
une partie inférieure (110) comportant une ouverture supérieure et une ouverture inférieure,
ladite ouverture supérieure de la partie inférieure (110) étant couplée de façon détachable
à l'ouverture inférieure de la partie supérieure (105) enfermant la bonbonne de gaz,
où une zone externe à l'ouverture supérieure de la partie supérieure (105) est en
communication par fluide avec une zone externe à l'ouverture inférieure de la partie
inférieure (110) pendant que la bonbonne de gaz est enfermée.
2. Dispositif de protection selon la revendication 1, dans lequel la partie supérieure
(105) a un corps essentiellement cylindrique qui présente une surface interne ondulée
à surfaces de contact orientées longitudinalement qui font contact avec le corps de
la bonbonne de gaz, lesdites surfaces de contact sont interposées entre des surfaces
orientées longitudinalement non de contact, où lesdites surfaces orientées longitudinalement
de contact et lesdites surfaces orientées longitudinalement non de contact forment
collectivement la surface interne ondulée.
3. Dispositif de protection selon la revendication 1 ou 2, dans lequel la partie supérieure
(105) comporte une partie s'effilant vers l'intérieur qui présente des ouvertures
dispersées circonférentiellement pour assurer une communication par fluide entre la
zone intérieure au dispositif de protection et la zone extérieure au dispositif de
protection.
4. Dispositif de protection selon la revendication 3, dans lequel la partie s'effilant
vers l'intérieur permet l'accès à des poignées (107, 605, 705) montées sur la bonbonne
de gaz.
5. Dispositif de protection selon l'une quelconque des revendications précédentes, dans
lequel la partie inférieure (110) a un corps essentiellement cylindrique qui présente
une surface interne ondulée à surfaces de contact orientées longitudinalement qui
font contact avec le corps de la bonbonne de gaz, lesdites surfaces de contact sont
interposées entre des surfaces orientées longitudinalement non de contact, où lesdites
surfaces orientées longitudinalement de contact et lesdites surfaces orientées longitudinalement
non de contact forment collectivement la surface interne ondulée.
6. Dispositif de protection selon la revendication 5, dans lequel lesdites surfaces de
contact et lesdites surfaces non de contact de la partie inférieure (110) sont alignées
avec des surfaces correspondantes de la partie supérieure (105) quand l'ouverture
inférieure de la partie supérieure est couplée de façon détachable à l'ouverture supérieure
de la partie inférieure enfermant la bonbonne de gaz.
7. Dispositif de protection selon l'une quelconque des revendications précédentes, dans
lequel la partie inférieure (110) comporte une partie de base à ouvertures dispersées
circonférentiellement (115) pour assurer la communication de fluide entre une zone
interne au dispositif de protection et une zone externe au dispositif de protection,
ladite communication de fluide étant assurée par le passage d'air entre les ouvertures
dispersées circonférentiellement de la partie supérieure et les ouvertures dispersées
circonférentiellement de la partie inférieure à travers les surfaces non de contact.
8. Dispositif de protection selon la revendication 7, dans lequel la partie de base comporte
une partie de rainure saillant vers l'intérieur.
9. Dispositif de protection selon l'une quelconque des revendications précédentes, dans
lequel la partie supérieure comporte une partie de lèvre saillant vers l'extérieur.
10. Dispositif de protection selon la revendication 8, dans lequel la partie de lèvre
de la partie supérieure (105) est configurée pour épouser la forme de la partie de
rainure saillant vers l'intérieur de la partie de base (110), permettant l'empilage
des bonbonnes.
11. Dispositif de protection selon l'une quelconque des revendications précédentes, dans
lequel la partie inférieure est configurée pour recevoir les poignées (105, 605, 705)
montées sur les bonbonnes de gaz durant l'empilage des bonbonnes de gaz.
12. Dispositif de protection selon l'une quelconque des revendications précédentes, dans
lequel la partie supérieure (105) et ladite partie inférieure (110) comprennent des
matières synthétiques.
13. Dispositif de protection selon l'une quelconque des revendications précédentes, dans
lequel l'ouverture inférieure de la partie supérieure (105) est couplée de façon détachable
à l'ouverture supérieure de la partie inférieure (110) au moyen d'un dispositif d'encliquetage
(405).
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description