EP1583481A1 - Method and device for manipulating heavy gas - Google Patents

Method and device for manipulating heavy gas

Info

Publication number
EP1583481A1
EP1583481A1 EP03795722A EP03795722A EP1583481A1 EP 1583481 A1 EP1583481 A1 EP 1583481A1 EP 03795722 A EP03795722 A EP 03795722A EP 03795722 A EP03795722 A EP 03795722A EP 1583481 A1 EP1583481 A1 EP 1583481A1
Authority
EP
European Patent Office
Prior art keywords
box
heavy gas
gas
closed position
introduction
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.)
Granted
Application number
EP03795722A
Other languages
German (de)
French (fr)
Other versions
EP1583481B1 (en
Inventor
Luc Barre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Barre Ets
ETS BARRE
Original Assignee
Barre Ets
ETS BARRE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Barre Ets, ETS BARRE filed Critical Barre Ets
Publication of EP1583481A1 publication Critical patent/EP1583481A1/en
Application granted granted Critical
Publication of EP1583481B1 publication Critical patent/EP1583481B1/en
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
    • A61D7/00—Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals
    • A61D7/04—Devices for anaesthetising animals by gases or vapours; Inhaling devices

Definitions

  • the present invention relates to a method and an apparatus for handling heavy gas.
  • heavy gas is meant according to the present invention, a gas heavier than ambient air.
  • Laboratory apparatus currently permitting the manipulation of gases for the purpose of anesthesia of animals, preferably of a series of animals, does not have sufficient reliability in terms of gas emissions, for personnel who manipulates them. They require a large consumption of gas, because filling an anesthesia chamber with heavy gas and then purging it are required for each anesthesia of an animal. In short, this results in an unfavorable slowness of this program, with a high consumption of gas and a risk of endangering the health of the operating personnel.
  • the object of the present invention is to develop a process and an apparatus for handling gases heavier than air, which overcome the abovementioned drawbacks.
  • This process and apparatus must be safe for operators and be cost effective economically favorable use, while allowing speed of execution.
  • the invention does not aim at an animal anesthesia process, the anesthesia conditions being able to be variable according to the requirements of the specific case, whether it is the nature or the concentrations of the gas , the number of animals to be anesthetized in succession, the animal species to be treated, their weight, etc.
  • the object of the invention is a process for manipulating the gas which protects the operating personnel, and this while allowing in particular the application of any method of therapeutic treatment, involving animal anesthesia in a box. .
  • a method of handling gas heavier than air in a box comprising - a successive closing and opening of the box, at the top of it, - a introduction of said heavy gas into the box in the closed position thereof and a stop of said introduction in the open position of the box, and - establishment of a depression peripherally at the top of the box with suction of heavy gas escaping from the top of the box to a confined enclosure.
  • any heavy gas overflowing beyond the upper edges of the box open from the top is immediately entrained in a confined enclosure, protected from the atmosphere breathed by operators.
  • the vacuum is continued throughout the process, whether the box is open or closed.
  • after each closing of said series of closings and openings from above it comprises an additional introduction of heavy gas into the closed box. Indeed, during the deposition and then the removal of an animal, the movement caused by its volume as well as the gas entrained by its fleece has the effect of a loss of gas in the box, which can thus be quickly compensated for during the next closing of the caisson.
  • the method comprises, at the bottom of the box, around it, a recovery of heavy gas flowing along the box from top to bottom.
  • this gas which, by its weight, will be deposited by licking the walls of the box, will also be collected towards an enclosure confined to the operator's shelter, preferably the same enclosure.
  • a source of heavy gas which can be in communication with the box and allow introduction of the heavy gas into its cavity
  • the box comprises an opening upwards and shutter means which can be moved between a closed position in which they close said opening upwards, and an open position, in which the latter is released, and said control means are capable of passing from a stop state to a release state of said communication and vice versa, said control means being in a stop state when the aforementioned shutter means are in a position d opening, and said closure means being in the closed position when said control means are in their aforesaid release state, the apparatus further comprising a source of vacuum and means for establishing a vacuum in an area peripheral at the top of the box, which are supplied by the vacuum source and which suck heavy gas escaping from the box from above in a confined enclosure.
  • said control means comprise a stop valve arranged in a conduit connecting the source of heavy gas and the cavity of the box, and a control element of the valve which is mechanically blocked in the above-mentioned stop state when the aforementioned closure means are in the open position and which mechanically blocks the closure means in the closed position when it is in the release.
  • a mechanical blocking of this kind it is also possible to provide a blocking by transmission of electrical or electronic signals, by connection systems or by remote transmissions.
  • control means comprise a stop valve arranged in a conduit connecting the source of heavy gas and the cavity of the box, and a control member which automatically blocks the valve in a stopped state when it detects an output signal from the shutter means out of their closed position and which automatically blocks the shutter means in the closed position when the valve is in the released state.
  • Figure 1 shows a perspective view, partially broken, of a heavy gas handling device according to the invention, in the closed position of the box.
  • 2 shows a view of a detail of the device according to Figure 1, in the open position of the box.
  • FIG. 3 represents a view in longitudinal section of a part of the apparatus according to FIG. 1.
  • the apparatus comprises a box 1 having a cavity 2 which can be closed in the example illustrated by a cover 3 capable of sliding between a closed position, represented in FIG. 1, and a open position shown in FIG. 2.
  • the box 1 is open upwards and therefore, even in the open position, the heavy gas introduced into the box tends to remain there by gravity.
  • a source 4 of heavy gas for example narcotic gas, known per se and shown only schematically, is capable of supplying the casing with gas via a conduit 5 in which is arranged a shut-off valve 6 also known per se.
  • This valve is controlled by a control element in the form of a bent lever 7, which is shown in the release position of the pipe 5 in FIG. 1 and in the stop position of the pipe 5 in FIG. 2.
  • the box 1 is supported on a support plate 8 provided with lateral spacing lugs 9.
  • the support plate 8 can be supported and possibly fixed on the flanges 10 d 'A bowl 11 open upwards, so that the edge of the plate 8 is located peripherally at a small distance from the bowl 11, leaving a gap between them 12.
  • the plate 8 is supported by the flanges 10 of the bowl so as to be in a plane slightly lower than these.
  • the support plate 8 carries guide bars 13, 14 which are shaped to receive the box, without allowing it to move horizontally during its use.
  • the cover 3 In the upper zone of the box 1, the latter is provided with a slide 15 in which the cover 3 can slide, which is preferably made of a transparent or translucent material. In the closed position, as shown in Figure 1, the cover 3 extends beyond the upper front edge 16 of the box, sliding over the latter.
  • the apparatus according to the invention also comprises an upper frame 17 which is formed from a hollow profile and which is simply placed on the longitudinal upper edges 18 and 19 and rear 20 of the box. This frame is thus supported at the periphery of the upward opening of the box 1.
  • the frame 17 has the shape of a U, the two branches 21 and 22 as well as the part central 23 protrude inwards, thus overhanging the cavity 2.
  • the branches 21 and 22 and the central part 23 of the U are perforated downward at preferably regular intervals.
  • the perforations 24 allow communication between the box and the cavity 29 of the frame 17.
  • the fourth side 25 of the frame, located at the front, is arranged below the front part of the cover in the closed position (see FIG. 3) .
  • a plate 26 provided with an upper bead 27 projects from the front side 25 of the frame through a slot 28 provided in the upper face of the latter.
  • a gap is left between the front edge of the slot 28 and the plate 26 so as to allow communication between the hollow 29 of the frame 17 and the space between the cover 3 and the front side 25 of the frame, in front of the front edge 16 of the box 1.
  • a narrow passage 39 is left free between the front edge 16 of the box and the cover 3.
  • the front side 25 of the hollow frame 17 is, in the example illustrated provided with a suction duct 30, provided with a flange 31 which can be attached to a corresponding flange 32 with a connector 33 provided on a flange 10 of the bowl.
  • This connector can be placed in communication with a hose 34 which leads to a suction device 35, known per se.
  • This central plate 37 can be used to support another bowl or any other body capable of carrying narcotic gas.
  • that of the bowl 36 can be connected in a known manner, not shown, to the suction device 35.
  • the box 1 is placed on the support plate 8 of the bowl 11, between the guide bars 13, 14.
  • the frame 17 is then placed on the upper edges of the box by placing the flange 31 on the flange 32.
  • the cover 3 is slid into the closed position of the box 1, then the valve 6 is then mounted.
  • control lever 7 bears against the front edge of the cover 3 and locks the cover in the closed position and the valve 6 is in the open position , that is to say that it releases the communication between the source of heavy gas 4 and the box 1, and authorizes an introduction of heavy gas into the box.
  • the suction device 35 It is also possible to simultaneously implement, or even before or even soon after, the suction device 35. This creates a slight depression at the upper periphery of the box 1, above the sides 21 to 23 of the frame 17 and below the cover along the side 25 thereof.
  • the box is vented through the passage 39, which channels the gas to the suction slot 28, which avoids any possible gas leakage in the closed position of the cover.
  • the lever 7 of the valve 6 can then be turned to the position shown in FIG. 2. In this position, the communication between the gas source 4 and the box 1 is stopped. In addition, the lever 7 no longer mechanically blocks the cover 3, and on the contrary it has passed into a lateral position which allows the opening of the box 1.
  • FIG. 2 shows the box 1 during this operation opening. The lever 7 is then blocked by the cover 3 in the stop position shown.
  • the heavy gas present in the box has a normal tendency to remain in the box, due to its heavier weight than air.
  • the movement of the cover and the introduction of an additional volume into the box have the effect that heavy gas inevitably overflows out of the box, in particular through passage 39.
  • This gas is however immediately sucked into the confined enclosure formed by the frame 17, which offers the great advantage of keeping operators out of contact with potentially harmful heavy gas.
  • the box is opened again and the anesthetized animal is removed, while another can be immediately introduced.
  • the box remains filled with heavy gas during the whole series of anesthesia and it is only necessary to regularly supplement this quantity of gas, for example at each closure, with an amount of heavy gas equivalent to that which has been aspirated. This results in a great saving in heavy gas.
  • the anesthetized animals which carry in their hairs narcotic gas, are advantageously deposited on the deposit plate
  • a control member which automatically blocks the valve in the stopped state when it detects an output signal from the means for closing the box outside their closed position and which automatically blocks the latter in the closing when the valve is open.
  • a limit switch which detects the position of the cover 3 in the closed position and which transmits a signal for example to a computer as soon as the cover leaves this closed position, the computer then controlling the closing of valve 6, which is in the form of a solenoid valve, without control element 7. It is therefore no longer in this case a mechanical blocking, but a blocking by electrical or electronic signals and the the cover itself can serve as a valve control trigger, for example triggering the introduction of gas as soon as the abovementioned limit switch makes it possible to detect the closed position of the cover.

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  • Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Public Health (AREA)
  • Housing For Livestock And Birds (AREA)
  • Catching Or Destruction (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Devices For Use In Laboratory Experiments (AREA)

Abstract

The invention relates to a method for manipulating a gas heavier than air in a tank. Said tank comprises a successive closure and opening arranged on the top thereof, an input for said heavy gas into the tank when it is closed and an off for said input when the tank is opened, and a depression unit arranged on the periphery of the top of the tank provided with a unit for sucking out the heavy gas effluent from the top of the tank to a closed chamber.

Description

"Procédé et appareil de manipulation de gaz lourd" "Method and apparatus for handling heavy gas"
La présente invention est relative à un procédé et à un appareil de manipulation de gaz lourd.The present invention relates to a method and an apparatus for handling heavy gas.
Par gaz lourd, il faut entendre suivant la présente invention, un gaz plus lourd que l'air ambiant.By heavy gas is meant according to the present invention, a gas heavier than ambient air.
On connaît déjà depuis longtemps des procédés d'anesthésie d'animaux de laboratoire. Les gaz appropriés, mis en oeuvre pour ces anesthésies, sont d'une manière générale plus lourds que l'air. Ils présentent par ailleurs l'inconvénient d'être, à partir de certaines concentrations dans l'air ambiant, dangereux et même nocifs pour le personnel qui manipule ces gaz. Ces gaz narcotiques sont aussi coûteux.Procedures for the anesthesia of laboratory animals have already been known for a long time. The appropriate gases used for these anesthesia are generally heavier than air. They also have the disadvantage of being, from certain concentrations in the ambient air, dangerous and even harmful to the personnel handling these gases. These narcotic gases are also expensive.
Les appareils de laboratoire permettant à l'heure actuelle de manipuler des gaz en vue d'une anesthésie d'animaux, de préférence d'une série d'animaux, ne présentent pas une fiabilité suffisante au niveau des rejets de gaz, pour le personnel qui les manipule. Ils nécessitent une grande consommation de gaz, car un remplissage d'un caisson d'anesthésie par du gaz lourd et puis sa purge sont requis pour chaque anesthésie d'un animal. En bref, il en résulte une lenteur peu favorable de ce programme, avec une consommation élevée de gaz et un risque de mettre en danger la santé du personnel opérant.Laboratory apparatus currently permitting the manipulation of gases for the purpose of anesthesia of animals, preferably of a series of animals, does not have sufficient reliability in terms of gas emissions, for personnel who manipulates them. They require a large consumption of gas, because filling an anesthesia chamber with heavy gas and then purging it are required for each anesthesia of an animal. In short, this results in an unfavorable slowness of this program, with a high consumption of gas and a risk of endangering the health of the operating personnel.
La présente invention a pour but de mettre au point un procédé et un appareil de manipulation de gaz plus lourd que l'air, qui surmontent les inconvénients précités. Ce procédé et cet appareil doivent être sûrs pour les opérateurs et présenter une rentabilité d'utilisation économiquement favorable, tout en permettant une rapidité d'exécution.The object of the present invention is to develop a process and an apparatus for handling gases heavier than air, which overcome the abovementioned drawbacks. This process and apparatus must be safe for operators and be cost effective economically favorable use, while allowing speed of execution.
Il faut entendre que l'invention n'a pas pour but un procédé d'anesthésie d'animaux, les conditions d'anesthésie pouvant être variables en fonction des exigences du cas d'espèce, que ce soit la nature ou les concentrations du gaz, le nombre d'animaux à anesthésier en succession, les espèces animales à traiter, leur poids, etc. L'invention a, au contraire, pour but un procédé de manipulation du gaz qui protège le personnel opérant, et cela tout en permettant notamment l'application de n'importe quelle méthode de traitement thérapeutique, impliquant une anesthésie d'animal dans un caisson.It should be understood that the invention does not aim at an animal anesthesia process, the anesthesia conditions being able to be variable according to the requirements of the specific case, whether it is the nature or the concentrations of the gas , the number of animals to be anesthetized in succession, the animal species to be treated, their weight, etc. The object of the invention, on the contrary, is a process for manipulating the gas which protects the operating personnel, and this while allowing in particular the application of any method of therapeutic treatment, involving animal anesthesia in a box. .
Pour résoudre ces problèmes, on a prévu, suivant l'invention, un procédé de manipulation de gaz plus lourd que l'air dans un caisson, comprenant - une fermeture et une ouverture successives du caisson, au haut de celui-ci, - une introduction dudit gaz lourd dans le caisson en position de fermeture de celui-ci et un arrêt de ladite introduction en position d'ouverture du caisson, et - un établissement d'une dépression périphériquement au haut du caisson avec aspiration de gaz lourd s'échappant par le haut du caisson vers une enceinte confinée. Ce procédé présente l'avantage qu'il ne comporte aucune purge du caisson pendant la manipulation. Il permet donc, par exemple, un traitement successif de plusieurs animaux par ouverture du caisson, retrait de l'animal anesthésie, dépôt d'un nouvel animal à anesthésier, puis fermeture du caisson, alors que le gaz introduit initialement dans le caisson y subsiste. L'ouverture du caisson par le haut favorise le maintien du gaz lourd à l'intérieur du caisson même si celui-ci est ouvert. Comme l'introduction de gaz lourd n'est autorisée que si le caisson est en position de fermeture, et que, en position d'ouverture du caisson, l'admission de gaz doit être à l'arrêt il n'y a pas de risque de sortie inopportune de gaz hors du caisson. Selon le cas on peut prévoir que l'ouverture du caisson commande elle-même l'interruption de l'admission de gaz ou que l'ouverture ne soit possible que si l'admission de gaz est interrompue. De même, on peut prévoir que la fermeture du caisson commande automatiquement une introduction de gaz dans le caisson, ou que cette introduction n'est possible qu'après fermeture du caisson.To solve these problems, provision has been made, according to the invention, for a method of handling gas heavier than air in a box, comprising - a successive closing and opening of the box, at the top of it, - a introduction of said heavy gas into the box in the closed position thereof and a stop of said introduction in the open position of the box, and - establishment of a depression peripherally at the top of the box with suction of heavy gas escaping from the top of the box to a confined enclosure. This method has the advantage that it does not purge the box during handling. It therefore allows, for example, a successive treatment of several animals by opening the box, removing the anesthetized animal, depositing a new animal to be anesthetized, then closing the box, while the gas initially introduced into the box remains . Opening the box from the top helps keep the heavy gas inside the box even if it is open. As the introduction of heavy gas is only authorized if the box is in the closed position, and when in the open position of the compartment, the gas intake must be stopped there is no risk of untimely gas leaving the compartment. Depending on the case, it can be provided that the opening of the box itself controls the interruption of the gas intake or that the opening is only possible if the gas intake is interrupted. Likewise, provision can be made for the closing of the box automatically to control the introduction of gas into the box, or for this introduction to be possible only after closing of the box.
Par l'établissement d'une dépression et d'une aspiration périphériquement au haut du caisson, tout gaz lourd débordant au-delà des bords supérieurs du caisson ouvert par le haut est immédiatement entraîné dans une enceinte confinée, à l'abri de l'atmosphère respirée par les opérateurs. Avantageusement, la dépression est poursuivie pendant tout le procédé, que le caisson soit ouvert ou fermé. Suivant une forme de réalisation de l'invention, après chaque fermeture de ladite série de fermetures et ouvertures par le haut, il comprend une introduction additionnelle de gaz lourd dans le caisson fermé. En effet lors du dépôt puis du retrait d'un animal, le mouvement occasionné par son volume ainsi que le gaz entraîné par sa toison a pour effet une perte de gaz dans le caisson, qui peut ainsi être rapidement compensée lors de la fermeture suivante du caisson.By establishing a vacuum and a suction peripherally at the top of the box, any heavy gas overflowing beyond the upper edges of the box open from the top is immediately entrained in a confined enclosure, protected from the atmosphere breathed by operators. Advantageously, the vacuum is continued throughout the process, whether the box is open or closed. According to one embodiment of the invention, after each closing of said series of closings and openings from above, it comprises an additional introduction of heavy gas into the closed box. Indeed, during the deposition and then the removal of an animal, the movement caused by its volume as well as the gas entrained by its fleece has the effect of a loss of gas in the box, which can thus be quickly compensated for during the next closing of the caisson.
Suivant une forme de réalisation avantageuse de l'invention, le procédé comprend, au bas du caisson, autour de celui-ci, une récupération de gaz lourd s'écoulant le long du caisson du haut vers le bas. Ainsi, même si du gaz lourd sorti du caisson n'a pas été aspiré par la dépression établie au haut du caisson, ce gaz, qui, par son poids, va se déposer en léchant les parois du caisson, sera récolté également vers une enceinte confinée à l'abri des opérateurs, de préférence la même enceinte. D'autres détails relatifs au procédé suivant l'invention sont indiqués dans les revendications 1 à 7 annexées. L'invention concerne également un appareil de manipulation de gaz plus lourd que l'air, comprenantAccording to an advantageous embodiment of the invention, the method comprises, at the bottom of the box, around it, a recovery of heavy gas flowing along the box from top to bottom. Thus, even if heavy gas taken out of the box has not been sucked in by the depression established at the top of the box, this gas, which, by its weight, will be deposited by licking the walls of the box, will also be collected towards an enclosure confined to the operator's shelter, preferably the same enclosure. Other details relating to the process according to the invention are indicated in claims 1 to 7 appended. The invention also relates to an apparatus for handling gas heavier than air, comprising
- un caisson présentant une cavité obturable,- a box having a closable cavity,
- une source de gaz lourd qui peut être en communication avec le caisson et permettre une introduction du gaz lourd dans sa cavité, eta source of heavy gas which can be in communication with the box and allow introduction of the heavy gas into its cavity, and
- des moyens de contrôle de ladite communication entre la source et la cavité du caisson.- Means for controlling said communication between the source and the cavity of the box.
Suivant l'invention le caisson comporte une ouverture vers le haut et des moyens d'obturation déplaçables entre une position de fermeture dans laquelle ils obturent ladite ouverture vers le haut, et une position d'ouverture, dans laquelle celle-ci est libérée, et lesdits moyens de contrôle sont capables de passer d'un état d'arrêt à un état de libération de ladite communication et inversement, lesdits moyens de contrôle étant à l'état d'arrêt lorsque les moyens d'obturation susdits sont dans une position d'ouverture, et lesdits moyens d'obturation étant en position de fermeture lorsque lesdits moyens de contrôle sont dans leur état de libération susdit, l'appareil comprenant en outre une source de dépression et des moyens d'établissement d'une dépression dans une zone périphérique au haut du caisson, qui sont alimentés par la source de dépression et qui aspirent du gaz lourd s'échappant du caisson par le haut dans une enceinte confinée. Ainsi, il est impossible d'ouvrir le caisson alors que le gaz continue à y être introduit et, inversement, une alimentation du caisson en gaz est impossible alors que celui-ci est ouvert. Suivant une forme de réalisation avantageuse de l'appareil suivant l'invention, lesdits moyens de contrôle comprennent une vanne d'arrêt agencée dans un conduit reliant la source de gaz lourd et la cavité du caisson, et un élément de commande de la vanne qui est bloqué mécaniquement en l'état d'arrêt susdit lorsque les moyens d'obturation susdits sont en position d'ouverture et qui bloque mécaniquement les moyens d'obturation en position de fermeture lorsqu'il est en état de libération. Au lieu d'un blocage mécanique de ce genre, on peut aussi prévoir un blocage par transmission de signaux électriques ou électroniques, par des systèmes de connexion ou par des transmissions à distance. On peut notamment prévoir que lesdits moyens de contrôle comprennent une vanne d'arrêt agencée dans un conduit reliant la source de gaz lourd et la cavité du caisson, et un organe de commande qui bloque automatiquement la vanne en état d'arrêt lorsqu'il détecte un signal de sortie des moyens d'obturation hors de leur position de fermeture et qui bloque automatiquement les moyens d'obturation en position de fermeture lorsque la vanne est en état de libération.According to the invention, the box comprises an opening upwards and shutter means which can be moved between a closed position in which they close said opening upwards, and an open position, in which the latter is released, and said control means are capable of passing from a stop state to a release state of said communication and vice versa, said control means being in a stop state when the aforementioned shutter means are in a position d opening, and said closure means being in the closed position when said control means are in their aforesaid release state, the apparatus further comprising a source of vacuum and means for establishing a vacuum in an area peripheral at the top of the box, which are supplied by the vacuum source and which suck heavy gas escaping from the box from above in a confined enclosure. Thus, it is impossible to open the box while the gas continues to be introduced into it and, conversely, a supply of gas to the box is impossible while it is open. According to an advantageous embodiment of the apparatus according to the invention, said control means comprise a stop valve arranged in a conduit connecting the source of heavy gas and the cavity of the box, and a control element of the valve which is mechanically blocked in the above-mentioned stop state when the aforementioned closure means are in the open position and which mechanically blocks the closure means in the closed position when it is in the release. Instead of a mechanical blocking of this kind, it is also possible to provide a blocking by transmission of electrical or electronic signals, by connection systems or by remote transmissions. One can in particular provide that said control means comprise a stop valve arranged in a conduit connecting the source of heavy gas and the cavity of the box, and a control member which automatically blocks the valve in a stopped state when it detects an output signal from the shutter means out of their closed position and which automatically blocks the shutter means in the closed position when the valve is in the released state.
D'autres détails concernant l'appareil suivant l'invention sont indiqués dans les revendications 8 à 18 annexées.Other details concerning the apparatus according to the invention are indicated in claims 8 to 18 appended.
D'autres détails et particularités de l'invention ressortiront de la description donnée ci-après, à titre non limitatif, et avec référence aux dessins annexés.Other details and particularities of the invention will emerge from the description given below, without implied limitation, and with reference to the attached drawings.
La figure 1 représente une vue en perspective, partiellement brisée, d'un appareil de manipulation de gaz lourd suivant l'invention, en position de fermeture du caisson. La figure 2 représente une vue d'un détail de l'appareil suivant la figure 1 , en position d'ouverture du caisson.Figure 1 shows a perspective view, partially broken, of a heavy gas handling device according to the invention, in the closed position of the box. 2 shows a view of a detail of the device according to Figure 1, in the open position of the box.
La figure 3 représente une vue en coupe longitudinale d'une partie de l'appareil suivant la figure 1.FIG. 3 represents a view in longitudinal section of a part of the apparatus according to FIG. 1.
Sur les différentes figures, les éléments identiques ou analogues sont désignés par les mêmes références.In the various figures, identical or analogous elements are designated by the same references.
Ainsi qu'il ressort des figures, l'appareil suivant l'invention comprend un caisson 1 présentant une cavité 2 obturable dans l'exemple illustré par un couvercle 3 capable de coulisser entre une position de fermeture, représentée sur la figure 1 , et une position d'ouverture représentée sur la figure 2. Le caisson 1 est ouvert vers le haut et donc, même en position ouverte, le gaz lourd introduit dans le caisson a tendance à y rester par gravité.As is apparent from the figures, the apparatus according to the invention comprises a box 1 having a cavity 2 which can be closed in the example illustrated by a cover 3 capable of sliding between a closed position, represented in FIG. 1, and a open position shown in FIG. 2. The box 1 is open upwards and therefore, even in the open position, the heavy gas introduced into the box tends to remain there by gravity.
Une source 4 de gaz lourd, par exemple du gaz narcotique, connue en soi et représentée uniquement de manière schématique, est capable d'alimenter le caisson en gaz par l'intermédiaire d'un conduit 5 dans lequel est agencée une vanne d'arrêt 6 également connue en soi. Cette vanne est commandée par un élément de commande en forme de levier coudé 7, qui est représenté dans la position de libération du conduit 5 sur la figure 1 et dans la position d'arrêt du conduit 5 sur la figure 2.A source 4 of heavy gas, for example narcotic gas, known per se and shown only schematically, is capable of supplying the casing with gas via a conduit 5 in which is arranged a shut-off valve 6 also known per se. This valve is controlled by a control element in the form of a bent lever 7, which is shown in the release position of the pipe 5 in FIG. 1 and in the stop position of the pipe 5 in FIG. 2.
Dans l'exemple illustré, le caisson 1 est supporté sur une plaque de support 8 pourvue de pattes latérales d'écartement 9. A l'aide de ces pattes, la plaque de support 8 peut être soutenue et éventuellement fixée sur les rebords 10 d'une cuvette 11 ouverte vers le haut, de manière que le bord de la plaque 8 soit situé périphériquement à une petite distance de la cuvette 11 , en laissant entre eux un intervalle 12. Avantageusement, la plaque 8 est supportée par les rebords 10 de la cuvette de manière à se trouver dans un plan légèrement inférieur à ceux-ci. Dans cet exemple de réalisation, la plaque de support 8 porte des barres de guidage 13, 14 qui sont conformées pour recevoir le caisson, sans lui permettre de déplacement horizontal pendant son utilisation.In the example illustrated, the box 1 is supported on a support plate 8 provided with lateral spacing lugs 9. With the aid of these lugs, the support plate 8 can be supported and possibly fixed on the flanges 10 d 'A bowl 11 open upwards, so that the edge of the plate 8 is located peripherally at a small distance from the bowl 11, leaving a gap between them 12. Advantageously, the plate 8 is supported by the flanges 10 of the bowl so as to be in a plane slightly lower than these. In this exemplary embodiment, the support plate 8 carries guide bars 13, 14 which are shaped to receive the box, without allowing it to move horizontally during its use.
Dans la zone supérieure du caisson 1 , celui-ci est pourvu d'une glissière 15 dans laquelle peut coulisser le couvercle 3, qui est de préférence en une matière transparente ou translucide. En position de fermeture, comme représenté sur la figure 1 , le couvercle 3 déborde largement au-delà du bord supérieur avant 16 du caisson, en glissant par-dessus ce dernier.In the upper zone of the box 1, the latter is provided with a slide 15 in which the cover 3 can slide, which is preferably made of a transparent or translucent material. In the closed position, as shown in Figure 1, the cover 3 extends beyond the upper front edge 16 of the box, sliding over the latter.
L'appareil suivant l'invention comprend aussi un cadre supérieur 17 qui est formé d'un profilé creux et qui est simplement posé sur les bords supérieurs longitudinaux 18 et 19 et arrière 20 du caisson. Ce cadre est ainsi supporté à la périphérie de l'ouverture vers le haut du caisson 1. Le long des trois bords précités 18 à 20, le cadre 17 a la forme d'un U dont les deux branches 21 et 22 ainsi que la partie centrale 23 font saillie vers l'intérieur en surplombant ainsi la cavité 2. Les branches 21 et 22 et la partie centrale 23 du U sont perforées vers le bas à intervalles de préférence réguliers. Les perforations 24 permettent une communication entre le caisson et la cavité 29 du cadre 17. Le quatrième côté 25 du cadre, situé à l'avant, est agencé en dessous de la partie avant du couvercle en position de fermeture (v. figure 3). Une plaquette 26 pourvue d'un bourrelet supérieur 27 fait saillie du côté avant 25 du cadre au travers d'une fente 28 prévue dans la face supérieure de celui- ci. Un intervalle est laissé entre le bord avant de la fente 28 et la plaquette 26 de manière à permettre une communication entre le creux 29 du cadre 17 et l'espace situé entre le couvercle 3 et le côté avant 25 du cadre, devant le bord avant 16 du caisson 1. Avantageusement, un étroit passage 39 est laissé libre entre le bord avant 16 du caisson et le couvercle 3.The apparatus according to the invention also comprises an upper frame 17 which is formed from a hollow profile and which is simply placed on the longitudinal upper edges 18 and 19 and rear 20 of the box. This frame is thus supported at the periphery of the upward opening of the box 1. Along the three aforementioned edges 18 to 20, the frame 17 has the shape of a U, the two branches 21 and 22 as well as the part central 23 protrude inwards, thus overhanging the cavity 2. The branches 21 and 22 and the central part 23 of the U are perforated downward at preferably regular intervals. The perforations 24 allow communication between the box and the cavity 29 of the frame 17. The fourth side 25 of the frame, located at the front, is arranged below the front part of the cover in the closed position (see FIG. 3) . A plate 26 provided with an upper bead 27 projects from the front side 25 of the frame through a slot 28 provided in the upper face of the latter. A gap is left between the front edge of the slot 28 and the plate 26 so as to allow communication between the hollow 29 of the frame 17 and the space between the cover 3 and the front side 25 of the frame, in front of the front edge 16 of the box 1. Advantageously, a narrow passage 39 is left free between the front edge 16 of the box and the cover 3.
Le côté avant 25 du cadre creux 17 est, dans l'exemple illustré pourvu d'un conduit d'aspiration 30, muni d'une bride 31 qui peut être rattachée à une bride 32 correspondante d'un raccord 33 prévu sur un rebord 10 de la cuvette. Ce raccord peut être mis en communication avec un flexible 34 qui mène à un dispositif d'aspiration 35, connu en soi.The front side 25 of the hollow frame 17 is, in the example illustrated provided with a suction duct 30, provided with a flange 31 which can be attached to a corresponding flange 32 with a connector 33 provided on a flange 10 of the bowl. This connector can be placed in communication with a hose 34 which leads to a suction device 35, known per se.
On peut prévoir, comme représenté sur la figure 1 , à côté de la cuvette 11 pourvue de la plaque de support 8 pour le caisson 1 , au moins une cuvette supplémentaire 36, également pourvue d'une plaque centrale 37 supportée à distance de la cuvette pour former entre celle-ci et la plaque 27 un intervalle 38. Cette plaque centrale 37 peut servir à supporter une autre cuvette ou tout autre corps susceptible de porter du gaz narcotique. Comme le fond de la cuvette 11 , celui de la cuvette 36 peut être raccordé d'une manière connue, non représentée, au dispositif d'aspiration 35.One can provide, as shown in Figure 1, next to the bowl 11 provided with the support plate 8 for the box 1, at least one additional bowl 36, also provided with a central plate 37 supported at a distance from the bowl to form between it and the plate 27 an interval 38. This central plate 37 can be used to support another bowl or any other body capable of carrying narcotic gas. Like the bottom of the bowl 11, that of the bowl 36 can be connected in a known manner, not shown, to the suction device 35.
Le fonctionnement de l'appareil de manipulation de gaz suivant l'invention, décrit ci-dessus, est le suivant.The operation of the gas handling apparatus according to the invention, described above, is as follows.
Le caisson 1 est déposé sur la plaque de support 8 de la cuvette 11 , entre les barres de guidage 13, 14. Le cadre 17 est alors déposé sur les bords supérieurs du caisson en plaçant la bride 31 sur la bride 32. Le couvercle 3 est coulissé en position de fermeture du caisson 1 , puis la vanne 6 est alors montée.The box 1 is placed on the support plate 8 of the bowl 11, between the guide bars 13, 14. The frame 17 is then placed on the upper edges of the box by placing the flange 31 on the flange 32. The cover 3 is slid into the closed position of the box 1, then the valve 6 is then mounted.
Elle est ensuite amenée dans la position représentée sur la figure 1. Dans cette position, le levier de commande 7 est en appui contre le bord avant du couvercle 3 et bloque le couvercle en position de fermeture et la vanne 6 est en position d'ouverture, c'est-à-dire qu'elle libère la communication entre la source de gaz lourd 4 et le caisson 1 , et autorise une introduction de gaz lourd dans le caisson.It is then brought into the position shown in FIG. 1. In this position, the control lever 7 bears against the front edge of the cover 3 and locks the cover in the closed position and the valve 6 is in the open position , that is to say that it releases the communication between the source of heavy gas 4 and the box 1, and authorizes an introduction of heavy gas into the box.
On peut alors mettre en oeuvre la source de gaz lourd 4 pour qu'elle alimente le caisson 1 jusqu'à saturation en ledit gaz lourd.We can then use the heavy gas source 4 so that it feeds the box 1 until saturation with said heavy gas.
On peut aussi mettre en oeuvre simultanément, ou encore avant ou même peu après, le dispositif d'aspiration 35. Celui-ci crée une légère dépression à la périphérie supérieure du caisson 1 , au-dessus des côtés 21 à 23 du cadre 17 et en dessous du couvercle le long du côté 25 de celui-ci. Le caisson est mis à l'atmosphère par le passage 39, qui canalise le gaz vers la fente d'aspiration 28, ce qui permet d'éviter toute fuite possible de gaz en position fermée du couvercle.It is also possible to simultaneously implement, or even before or even soon after, the suction device 35. This creates a slight depression at the upper periphery of the box 1, above the sides 21 to 23 of the frame 17 and below the cover along the side 25 thereof. The box is vented through the passage 39, which channels the gas to the suction slot 28, which avoids any possible gas leakage in the closed position of the cover.
Le levier 7 de la vanne 6 peut alors être tourné dans la position représentée sur la figure 2. Dans cette position, la communication entre la source de gaz 4 et le caisson 1 est arrêtée. De plus, le levier 7 ne bloque plus mécaniquement le couvercle 3, et il est au contraire passé dans une position latérale qui autorise l'ouverture du caisson 1. La figure 2 montre le caisson 1 pendant cette opération d'ouverture. Le levier 7 est alors bloqué par le couvercle 3 dans la position d'arrêt représentée.The lever 7 of the valve 6 can then be turned to the position shown in FIG. 2. In this position, the communication between the gas source 4 and the box 1 is stopped. In addition, the lever 7 no longer mechanically blocks the cover 3, and on the contrary it has passed into a lateral position which allows the opening of the box 1. FIG. 2 shows the box 1 during this operation opening. The lever 7 is then blocked by the cover 3 in the stop position shown.
On peut alors introduire un corps dans le caisson, par exemple le corps d'un animal à anesthésier, puis le couvercle est refermé.We can then introduce a body into the box, for example the body of an animal to be anesthetized, then the cover is closed.
Pendant cette opération le gaz lourd présent dans le caisson a une tendance normale à rester dans le caisson, du fait de son poids plus lourd que l'air. Toutefois le mouvement du couvercle et l'introduction d'un volume supplémentaire dans le caisson ont pour effet que du gaz lourd déborde inévitablement hors du caisson, notamment par le passage 39. Ce gaz est cependant immédiatement aspiré dans l'enceinte confinée que forme le cadre 17, ce qui offre le grand avantage de garder les opérateurs hors du contact du gaz lourd éventuellement nocif. Quand l'animal est anesthésie, on ouvre à nouveau le caisson et on sort l'animal anesthésie, tandis qu'un autre peut immédiatement être introduit. En effet, le caisson reste rempli de gaz lourd pendant toute la série d'anesthésies et il est uniquement nécessaire de compléter régulièrement cette quantité de gaz, par exemple à chaque fermeture, par une quantité de gaz lourd équivalente à celle qui a été aspirée. Il en résulte une grande économie de gaz lourd.During this operation the heavy gas present in the box has a normal tendency to remain in the box, due to its heavier weight than air. However, the movement of the cover and the introduction of an additional volume into the box have the effect that heavy gas inevitably overflows out of the box, in particular through passage 39. This gas is however immediately sucked into the confined enclosure formed by the frame 17, which offers the great advantage of keeping operators out of contact with potentially harmful heavy gas. When the animal is anesthetized, the box is opened again and the anesthetized animal is removed, while another can be immediately introduced. Indeed, the box remains filled with heavy gas during the whole series of anesthesia and it is only necessary to regularly supplement this quantity of gas, for example at each closure, with an amount of heavy gas equivalent to that which has been aspirated. This results in a great saving in heavy gas.
Les animaux anesthésiés, qui portent dans leurs poils du gaz narcotique, sont avantageusement déposés sur la plaque de dépôtThe anesthetized animals, which carry in their hairs narcotic gas, are advantageously deposited on the deposit plate
37 d'une cuvette 36. Le gaz lourd s'écoule alors lentement de l'animal dans la cuvette 36, par la fente 38.37 from a bowl 36. The heavy gas then flows slowly from the animal into the bowl 36, through the slot 38.
De même, si du gaz lourd parvient à échapper à l'aspiration du cadre 17, ce gaz va s'écouler de haut en bas du caisson 1 et être recueilli dans la cuvette 11 , en passant par la fente 12.Likewise, if heavy gas manages to escape the suction of the frame 17, this gas will flow from top to bottom of the box 1 and be collected in the bowl 11, passing through the slot 12.
Il doit être entendu que la présente invention n'est en aucune façon limitée à la forme de réalisation décrite ci-dessus et que bien des modifications peuvent y être apportées sans sortir du cadre des revendications annexées.It should be understood that the present invention is in no way limited to the embodiment described above and that many modifications can be made without departing from the scope of the appended claims.
On peut par exemple envisager un organe de commande qui bloque automatiquement la vanne en état d'arrêt lorsqu'il détecte un signal de sortie des moyens d'obturation du caisson hors de leur position de fermeture et qui bloque automatiquement ceux-ci en position de fermeture lorsque la vanne est ouverte. A cet effet on peut imaginer un interrupteur de fin de course qui détecte la position du couvercle 3 en position fermée et qui émet un signal par exemple à un ordinateur dès que le couvercle sort de cette position de fermeture, l'ordinateur commandant alors la fermeture de la vanne 6, qui se présente sous la forme d'une électrovanne, sans élément de commande 7. Il ne s'agit donc plus dans ce cas d'un blocage mécanique, mais d'un blocage par signaux électriques ou électroniques et le couvercle lui-même peut servir de déclencheur de commande de la vanne, par exemple déclencher l'introduction de gaz dès que le commutateur de fin de course susdit permet de détecter la position de fermeture du couvercle.One can for example consider a control member which automatically blocks the valve in the stopped state when it detects an output signal from the means for closing the box outside their closed position and which automatically blocks the latter in the closing when the valve is open. For this purpose one can imagine a limit switch which detects the position of the cover 3 in the closed position and which transmits a signal for example to a computer as soon as the cover leaves this closed position, the computer then controlling the closing of valve 6, which is in the form of a solenoid valve, without control element 7. It is therefore no longer in this case a mechanical blocking, but a blocking by electrical or electronic signals and the the cover itself can serve as a valve control trigger, for example triggering the introduction of gas as soon as the abovementioned limit switch makes it possible to detect the closed position of the cover.
On peut aussi imaginer que, au lieu de reposer sur la plaque de support 8 et de supporter le cadre 17, le caisson 1 soit suspendu au cadre 17, lui-même directement supporté par la plaque 28, ou une table de travail quelconque. Cet agencement permet un détachement aisé du caisson par exemple pour son nettoyage, sans devoir démonter préalablement de nombreux éléments de l'appareil. One can also imagine that, instead of resting on the support plate 8 and supporting the frame 17, the box 1 is suspended from the frame 17, itself directly supported by the plate 28, or any work table. This arrangement allows easy detachment of the box for example for cleaning, without having to disassemble many elements of the device beforehand.

Claims

REVENDICATIONS
1. Procédé de manipulation de gaz plus lourd que l'air dans un caisson, comprenant1. A method of handling gas heavier than air in a box, comprising
- une fermeture et une ouverture successives du caisson, au haut de celui-ci,- a successive closing and opening of the box, at the top of it,
- une introduction dudit gaz lourd dans le caisson en position de fermeture de celui-ci et un arrêt de ladite introduction en position d'ouverture du caisson, etan introduction of said heavy gas into the box in the closed position thereof and a stop of said introduction in the open position of the box, and
- un établissement d'une dépression périphériquement au haut du caisson avec aspiration de gaz lourd s'échappant par le haut du caisson vers une enceinte confinée.- establishment of a depression peripherally at the top of the box with suction of heavy gas escaping from the top of the box towards a confined enclosure.
2. Procédé suivant la revendication 1 , caractérisé en ce que l'ouverture du caisson commande un arrêt de ladite introduction et la fermeture du caisson autorise une introduction dudit gaz lourd dans le caisson.2. Method according to claim 1, characterized in that the opening of the box controls a stopping of said introduction and the closing of the box authorizes an introduction of said heavy gas into the box.
3. Procédé suivant la revendication 1 , caractérisé en ce qu'un arrêt de ladite introduction autorise une ouverture du caisson et une fermeture du caisson autorise une admission dudit gaz lourd dans le caisson. 4. Procédé suivant l'une des revendications 1 à 3, caractérisé en ce que, après une fermeture initiale du caisson, l'introduction de gaz lourd réalise une saturation du caisson en ce gaz et en ce que, après chaque fermeture suivante de ladite succession de fermetures et ouvertures par le haut, il comprend une introduction additionnelle de gaz lourd dans le caisson fermé.3. Method according to claim 1, characterized in that a stop of said introduction authorizes an opening of the box and a closing of the box allows an admission of said heavy gas into the box. 4. Method according to one of claims 1 to 3, characterized in that, after an initial closure of the box, the introduction of heavy gas saturates the box with this gas and in that, after each subsequent closure of said succession of closings and openings from above, it includes an additional introduction of heavy gas into the closed box.
ea-r-actόrioό G-R— ^5. Procédé suivant l'une des revendications 1 à 4, caractérisé en ce que l'établissement de la dépression est poursuivie pendant tout le procédé. ea-r-actόrioό GR— ^ 5. Method according to one of claims 1 to 4, characterized in that the establishment of depression is continued throughout the process.
6. Procédé suivant l'une des revendications 1 à 5, caractérisé en ce qu'il comprend, au bas du caisson, autour de celui-ci, une récupération de gaz lourd s'écoulant le long du caisson du haut vers le bas. 7. Procédé suivant l'une des revendications 1 à 6, caractérisé en ce que le gaz lourd est un gaz narcotique.6. Method according to one of claims 1 to 5, characterized in that it comprises, at the bottom of the box, around it, a recovery of heavy gas flowing along the box from top to bottom. 7. Method according to one of claims 1 to 6, characterized in that the heavy gas is a narcotic gas.
8. Appareil de manipulation de gaz plus lourd que l'air, comprenant8. Heavier than air gas handling apparatus, comprising
- un caisson (1 ) présentant une cavité (2) obturable, - une source de gaz lourd (4) qui peut être en communication avec le caisson et permettre une introduction du gaz lourd dans sa cavité, et- a box (1) having a closable cavity (2), - a source of heavy gas (4) which can be in communication with the box and allow the introduction of heavy gas into its cavity, and
- des moyens de contrôle (6, 7) de ladite communication entre la source (4) et la cavité (2) du caisson, caractérisé en ce que le caisson (1 ) comporte une ouverture vers le haut et des moyens d'obturation (3) deplaçables entre une position de fermeture dans laquelle ils obturent ladite ouverture vers le haut, et une position d'ouverture, dans laquelle celle-ci est libérée, en ce que lesdits moyens de contrôle (6, 7) sont capables de passer d'un état d'arrêt à un état de libération de ladite communication et inversement, lesdits moyens de contrôle (6, 7) étant à l'état d'arrêt lorsque les moyens d'obturation (3) susdits sont dans une position d'ouverture, et lesdits moyens d'obturation (3) étant en position de fermeture lorsque lesdits moyens de contrôle (6, 7) sont dans leur état de libération susdit, et en ce qu'il comprend en outre une source de dépression (35) et des moyens d'établissement d'une dépression (17) dans une zone périphérique au haut du caisson, qui sont alimentés par la source de dépression et qui aspirent du gaz lourd s'échappant du caisson (1 ) par le haut dans une enceinte confinée. 9. Appareil de manipulation suivant la revendication 8, caractérisé en ce qu'il comprend en outre, dans une zone périphérique extérieure au bas du caisson (1 ), des moyens de récupération (11 ) du gaz lourd s'écoulant le long du caisson du haut vers le bas.- control means (6, 7) of said communication between the source (4) and the cavity (2) of the box, characterized in that the box (1) has an opening upwards and shutter means ( 3) displaceable between a closed position in which they close said opening upwards, and an open position, in which the latter is released, in that said control means (6, 7) are capable of passing from 'a stop state to a state of release of said communication and vice versa, said control means (6, 7) being in the stop state when the aforementioned shutter means (3) are in a position of opening, and said closure means (3) being in the closed position when said control means (6, 7) are in their aforementioned release state, and in that it further comprises a source of vacuum (35) and means for establishing a depression (17) in a peripheral zone at the top of the caisso n, which are supplied by the vacuum source and which suck heavy gas escaping from the box (1) from above in a confined enclosure. 9. Handling apparatus according to claim 8, characterized in that it further comprises, in a peripheral zone outside the bottom of the box (1), means for recovering (11) the heavy gas flowing along the box from top to bottom.
10. Appareil de manipulation suivant l'une ou l'autre des revendications 8 et 9, caractérisé en ce que les moyens d'établissement d'une dépression fonctionnent en continu.10. Handling device according to either of Claims 8 and 9, characterized in that the means for establishing a vacuum operate continuously.
11. Appareil de manipulation suivant l'une quelconque des revendications 8 à 10, caractérisé en ce que lesdits moyens de contrôle comprennent une vanne d'arrêt (6) agencée dans un conduit (5) reliant la source de gaz lourd (4) et la cavité (2) du caisson, et un élément de commande (7) de la vanne qui est bloqué mécaniquement en l'état d'arrêt susdit lorsque les moyens d'obturation (3) susdits sont en position d'ouverture et qui bloque mécaniquement les moyens d'obturation (3) en position de fermeture lorsqu'il est en état de libération.11. A handling device according to any one of claims 8 to 10, characterized in that said control means comprise a stop valve (6) arranged in a conduit (5) connecting the source of heavy gas (4) and the cavity (2) of the box, and a control element (7) of the valve which is mechanically blocked in the above-mentioned stop state when the aforementioned closure means (3) are in the open position and which blocks mechanically the shutter means (3) in the closed position when it is in the released state.
12. Appareil de manipulation suivant l'une quelconque des revendications 8 à 10, caractérisé en ce que lesdits moyens de contrôle comprennent une vanne d'arrêt (6) agencée dans un conduit (5) reliant la source de gaz lourd (4) et la cavité (2) du caisson, et un organe de commande qui bloque automatiquement la vanne en état d'arrêt lorsqu'il détecte un signal de sortie des moyens d'obturation hors de leur position de fermeture et qui bloque automatiquement les moyens d'obturation en position de fermeture lorsque la vanne est en état de libération.12. A handling device according to any one of claims 8 to 10, characterized in that said control means comprise a stop valve (6) arranged in a conduit (5) connecting the source of heavy gas (4) and the cavity (2) of the box, and a control member which automatically blocks the valve in the stopped state when it detects an output signal from the shutter means out of their closed position and which automatically blocks the means of obturation in the closed position when the valve is in the release state.
13. Appareil de manipulation suivant l'une quelconque des revendications 8 à 10, caractérisé en ce que lesdits moyens de contrôle comprennent une vanne d'arrêt (6) agencée dans un conduit (5) reliant la source de gaz lourd (4) et la cavité (2) du caisson, et un organe de commande qui bloque automatiquement la vanne en état d'arrêt lorsqu'il détecte un signal de sortie des moyens d'obturation hors de leur position de fermeture et qui est capable de commander la vanne en état de libération lorsque les moyens d'obturation sont en position de fermeture. 14. Appareil de manipulation suivant l'une quelconque des revendications 8 à 13, caractérisé en ce que les moyens d'obturation sont constitués d'un couvercle (3) coulissant dans une glissière (15) prévue au niveau de l'ouverture vers le haut du caisson (1 ).13. A handling device according to any one of claims 8 to 10, characterized in that said control means comprise a stop valve (6) arranged in a conduit (5) connecting the source of heavy gas (4) and the cavity (2) of the box, and a control member which automatically blocks the valve in the stopped state when it detects an output signal from the shutter means out of their closed position and which is capable of controlling the valve in the released state when the shutter means are in the closed position. 14. Handling apparatus according to any one of claims 8 to 13, characterized in that the sealing means consist of a cover (3) sliding in a slide (15) provided at the opening towards the top of the box (1).
15. Appareil de manipulation suivant la revendication 14, caractérisé en ce que les moyens d'établissement d'une dépression comprennent un cadre (17) formé d'un profilé creux qui est supporté par le caisson à la périphérie de son ouverture vers le haut et qui, sur trois côtés (21-23),23), surplombe une partie de la cavité (2) du caisson et donc le couvercle (3) en position de fermeture, tandis que, sur un quatrième côté (25), il est sous-jacent au couvercle en position de fermeture et en ce que ledit profilé creux est muni, face au couvercle en position de fermeture, d'ouvertures d'aspiration (24, 28), tandis qu'il est en communication par un conduit approprié (30) avec ladite source de dépression.15. Handling apparatus according to claim 14, characterized in that the means for establishing a depression comprise a frame (17) formed of a hollow profile which is supported by the box at the periphery of its opening upwards and which, on three sides (21-23), 23), overhangs part of the cavity (2) of the box and therefore the cover (3) in the closed position, while, on a fourth side (25), it is underlying the cover in the closed position and in that said hollow profile is provided, facing the cover in the closed position, with suction openings (24, 28), while it is in communication by a conduit suitable (30) with said source of vacuum.
16. Appareil de manipulation suivant l'une quelconque des revendications 9 à 15, caractérisé en ce que lesdits moyens de récupération comprennent une cuvette (11 ) ouverte vers le haut et une plaque de support (8) pour le caisson (1 ) qui est soutenue centralement dans la cuvette à distance de celle-ci.16. Handling apparatus according to any one of claims 9 to 15, characterized in that said recovery means comprise a bowl (11) open upwards and a support plate (8) for the box (1) which is centrally supported in the bowl at a distance from it.
17. Appareil de manipulation suivant la revendication 16, caractérisé en ce que la cuvette présente des moyens de dépression qui agissent en dessous de la plaque de support et aspirent le gaz lourd récupéré par la cuvette.17. A handling device according to claim 16, characterized in that the bowl has vacuum means which act below the support plate and suck the heavy gas recovered by the bowl.
18. Appareil suivant l'une des revendications 16 et 17, caractérisé en ce qu'il comprend en outre à côté de la cuvette (11 ) pourvue d'une plaque de support (8) pour le caisson (1 ) au moins une cuvette supplémentaire (36) pourvue chacune d'une plaque de support (37) pour un autre caisson et/ou pour un corps porteur de gaz plus lourd que l'air. 18. Apparatus according to one of claims 16 and 17, characterized in that it further comprises next to the bowl (11) provided with a support plate (8) for the box (1) at least one bowl additional (36) each provided with a support plate (37) for another box and / or for a gas carrier body heavier than air.
EP03795722A 2003-01-09 2003-12-24 Method and device for manipulating heavy gas Expired - Lifetime EP1583481B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE2003/0019A BE1015298A3 (en) 2003-01-09 2003-01-09 Method and apparatus for handling heavy gas.
BE200300019 2003-01-09
PCT/BE2003/000231 WO2004062523A1 (en) 2003-01-09 2003-12-24 Method and device for manipulating heavy gas

Publications (2)

Publication Number Publication Date
EP1583481A1 true EP1583481A1 (en) 2005-10-12
EP1583481B1 EP1583481B1 (en) 2008-10-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03795722A Expired - Lifetime EP1583481B1 (en) 2003-01-09 2003-12-24 Method and device for manipulating heavy gas

Country Status (7)

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US (1) US7533702B2 (en)
EP (1) EP1583481B1 (en)
AT (1) ATE412380T1 (en)
AU (1) AU2003298045A1 (en)
BE (1) BE1015298A3 (en)
DE (1) DE60324469D1 (en)
WO (1) WO2004062523A1 (en)

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FR2879094B1 (en) * 2004-12-10 2007-10-26 Equip Veterinaire Minerve Sa DIRECT ANESTHETIC GAS INDUCTION DEVICE FOR RODENT, ASSOCIATED WITH A SECURE AND TRANSFERABLE ISOLATION CELL TO A MEDICAL IMAGING DATA ACQUISITION UNIT
JP4845450B2 (en) * 2005-08-08 2011-12-28 オリンパス株式会社 Anesthesia case
JP4948060B2 (en) * 2006-07-06 2012-06-06 オリンパス株式会社 Living body observation device
FR2913589B1 (en) * 2007-03-13 2010-01-08 Tech Equipement Medical MODULAR LABORATORY ANIMAL EXPERIMENTATION STATION.
US20120272919A1 (en) * 2011-04-26 2012-11-01 The University Of Utah Animal euthanasia systems and methods
USD899716S1 (en) * 2018-06-07 2020-10-20 Top Equipment B.V. Animal euthanizing machine

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US3367308A (en) * 1966-04-26 1968-02-06 Nasa Usa Exposure system for animals
US3877420A (en) * 1973-11-15 1975-04-15 Baker Company Inc Animal housing
US4332244A (en) * 1980-10-08 1982-06-01 The Government Of The United States As Represented By The Secretary Of Department Of Health And Human Services Mask for the safe delivery of inhalation gases to small laboratory animals
US4807617A (en) * 1988-02-01 1989-02-28 Massachusetts Eye And Ear Infirmary Scavenging mask
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Also Published As

Publication number Publication date
US7533702B2 (en) 2009-05-19
BE1015298A3 (en) 2005-01-11
WO2004062523A1 (en) 2004-07-29
EP1583481B1 (en) 2008-10-29
AU2003298045A1 (en) 2004-08-10
DE60324469D1 (en) 2008-12-11
ATE412380T1 (en) 2008-11-15
US20060107951A1 (en) 2006-05-25

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