EP2413759B1 - Pneumatic suction device - Google Patents

Pneumatic suction device Download PDF

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Publication number
EP2413759B1
EP2413759B1 EP10717702.4A EP10717702A EP2413759B1 EP 2413759 B1 EP2413759 B1 EP 2413759B1 EP 10717702 A EP10717702 A EP 10717702A EP 2413759 B1 EP2413759 B1 EP 2413759B1
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Prior art keywords
suction device
nozzle
negative
secondary nozzle
container
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EP10717702.4A
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German (de)
French (fr)
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EP2413759A1 (en
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Patrice Dessuise
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ANUMSA
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ANUMSA
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/16—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with suction devices other than rotary fans
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0072—Mechanical means for controlling the suction or for effecting pulsating action
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • A47L9/2821—Pressure, vacuum level or airflow
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user

Definitions

  • the present invention relates to a pneumatic suction device, that is to say to motorization by air under pressure and venturi effect. It relates more particularly to an improvement relating to a suction device having suction type management means.
  • Aspiration devices as disclosed in prior patents, are known in particular.
  • GB 882,518 and FR 843,511 so-called pneumatic, in which the expansion of a gas under pressure is used to create a vacuum and, consequently, to generate a suction phenomenon.
  • the pressurized gas is generally compressed air from a factory supply network or a compressor site, for example.
  • the compressed air is sent into a nozzle whose internal shape is adapted to generate, by venturi effect, a vacuum upstream of the weakest section of said nozzle when compressed air expands downstream of said section.
  • This principle being perfectly known, it will not be described further here. It will be recalled simply that the flow and the depression depend, of course, the shape and dimensions of the nozzle, and in particular of its section. In fact, with a large nozzle, we obtain a large volume of displaced air but at the cost of a relatively low vacuum. On the other hand, with a nozzle of smaller dimensions, there will be less flow but the depression will then be stronger.
  • the technical problem to be solved, by the object of the present invention is to propose a pneumatic suction device comprising a nozzle, called main, through which the expansion of a compressed gas is able to generate by reaction a suction suction and vacuum given, which pneumatic suction device avoids the problems of the state of the art by offering substantially expanded operating capabilities, including the nature and consistency of products to aspirate.
  • the pneumatic suction device comprises, in addition, at least one secondary nozzle which can be activated by reaction in substitution with the main nozzle, through which the expansion of the compressed gas is able to generate a suction of a lower flow and a higher vacuum respectively to the flow rate and the vacuum obtained with the main nozzle, and in that each nozzle coaxial secondary to the main nozzle is movably mounted in displacement between a passive position in which the effective expansion of the compressed gas is operated in the main nozzle and an active position in which the effective expansion of the compressed gas is operated by said secondary nozzle.
  • any mobility can of course be considered.
  • the invention as thus defined has the advantage of being able to vary the essential parameters of the suction depending on the intended application, and in particular the nature and / or consistency of the product to be sucked.
  • the same pneumatic suction device is able to collect efficiently, both substances requiring both a high flow and a limited depression such as, for example, dust or powdery materials, substances that require on the contrary a significant depression, even at a reduced flow, such as, for example, more or less viscous liquids.
  • the invention proposes an improvement which in certain cases makes it possible to prohibit the high pressure in order to save the corresponding drums, and thus secure the operation.
  • the present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.
  • the figures 1 and 2 schematically illustrate a pneumatic suction device (1) operating with compressed air at about 6 to 7 bar, which is provided here via the inlet (2).
  • conventional distribution means (3) which are responsible for regulating the pressure of the air which will be admitted into the pneumatic suction device (1), in particular with a view to controlling the final level of depression for obvious security reasons.
  • the pneumatic suction device (1) is provided with a nozzle (10), called the main nozzle, which is shaped so that the expansion of the compressed air through it can generate, by reaction in the recovery container (50), suction of high flow and limited depression.
  • the pneumatic suction device (1) further comprises a secondary nozzle (20) which is, in turn, shaped in such a way that the expansion of the air compressed through it, it is able to generate, by reaction, suction of low flow but significant depression.
  • This secondary nozzle (20) coaxial with the main nozzle (10), is also mounted to move in translation between a passive position ( figure 1 ) where it acts as a pressure relief nozzle, and in which the effective expansion of the compressed air is effected via the main nozzle (10), and an active position ( figure 2 ), wherein the effective expansion of the compressed air is effected through said secondary nozzle (20); the air compressed to relax being conveyed by a rear nozzle (200) integral in its movements of the secondary nozzle (20).
  • the main nozzle (10) and the secondary nozzle (20) are coaxial.
  • the secondary nozzle (20) is mounted movably in axial translation with respect to the main nozzle (10). But, of course, other relative positioning and other types of mobility could be well envisaged.
  • the pneumatic suction device (1) further comprises displacement means (30) which are arranged so as to ensure the mobility of the secondary nozzle (20) between its passive position ( figure 1 ) and its active position ( figure 2 ), perfect and spotted and to meet the ventilation requirements "venturi”.
  • the displacement means (30) here comprise a jack (31) which is able to move the secondary nozzle (20) between its passive position ( figure 1 ) and its active position ( figure 2 ) in which said secondary nozzle (20) is disposed respectively at a distance and substantially within the main nozzle (10).
  • a jack (31) which is able to move the secondary nozzle (20) between its passive position ( figure 1 ) and its active position ( figure 2 ) in which said secondary nozzle (20) is disposed respectively at a distance and substantially within the main nozzle (10).
  • the jack (31) is composed of a hollow rod (32) which is integral with a piston (33) slidably mounted inside. a sealed chamber (34); the distal end of the hollow rod (32) being integral with the secondary nozzle (20).
  • the hollow rod (32) comprises, on the one hand, an inlet opening (35) communicating with compressed air supply means (4), and on the other hand, an exhaust opening, constituting a diffusion nozzle (36) opening directly into the secondary nozzle (20).
  • the hollow rod (32) thus advantageously serves as a conduit for bringing the compressed air to the inside of the pneumatic suction device (1) of the "venturi" type.
  • the pneumatic suction device (1) comprises control means (40) which are able to control the bidirectional implementation of the displacement means (30).
  • the control means (40) of the vacuum level in the recovery container (50) comprise a valve which is able to inject air under pressure, via the pipe (5), into the active part ( 37) of the chamber (34) of the cylinder (31), thus translating the piston (33), and consequently the secondary nozzle (20), to generate a greater vacuum, and without injection of compressed air in the part active (37) of the chamber (34) of the cylinder (31), the stable position of the piston (33) being, in fact, the withdrawn position of the cylinder.
  • control means (40) are furthermore capable of determining the level of the depression generated inside the pneumatic suction device (1).
  • the control means (40) communicate with the inside of the pneumatic suction device (1) via a conduit (6).
  • control means (40) are able to automatically control the implementation of the displacement means (30) when the vacuum inside the pneumatic suction device (1) exceeds a predetermined threshold value or falls below this threshold value after operation at high vacuum.
  • the pneumatic suction device (1) is configured by default to operate with the main nozzle (10); the secondary nozzle (20) being in the passive position.
  • the compressed air coming from the inlet (2) (arrow f1) is admitted into the system (arrow f2) under the control of the distribution means (3).
  • the compressed air then arrives (arrow f3) via the conduit (4) in the passive part (38) of the chamber (34) of the cylinder (31). It then passes through the inlet opening (35) in the hollow rod (32) which it passes through (arrow f4) until it opens into the secondary nozzle (20) via the nozzle (36), whose function of relaxation is neutralized in the rear position.
  • the compressed air is almost injected (arrow f5) in the main nozzle (10) which is advantageously positioned in its axis.
  • the pressurized gas can then fully relax (arrow f6) since the opening (11) of said main nozzle (10) is on the outside.
  • the depression (arrow f7) which is created inside the pneumatic suction device (1) then extends to a recovery container (50) provided with a suction nozzle (51).
  • the suction phenomenon that is then generated at the end of the suction nozzle (51) (arrow f8) allows to suck material (100) which will accumulate advantageously in the recovery container (50).
  • the control means (40) When, for example, for reasons of closure and difficulty of aspiration, the level of depression inside the suction device pneumatic (1) reaches a predetermined threshold value, the control means (40) will be informed through the presence of the conduit (6). In accordance with the figure 2 , the control means (40) will then control the implementation of the displacement means (30) to activate the secondary nozzle (20). For this, compressed air will be injected via the pipe (5) (arrow f9) into the active part (37) of the chamber (34) of the cylinder (31), which will cause the displacement of the piston (33). ). The secondary nozzle (20) will, therefore, translate towards the main nozzle (10) to its active position.
  • control means change state and instruct the secondary nozzle (20) to return to its initial neutralized position to leave activates only the main nozzle (10), allowing the high-speed suction to resume.
  • the present invention relates to an improvement which makes it possible to prohibit the passage of suction at the high pressure when this is necessary. This is for example the case of suction made in a barrel type oil (50 ') whose walls are thin.
  • the device comprises means for prohibiting the high pressure and more particularly to prohibit the control means (40) constituted by a vacuum intake (63) which will be called a vacuum sensor, and a pressure switch, to determine the level of depression generated, and thus control the passage of the secondary nozzle (20) to be placed in the neutralized position to leave only the main nozzle (10), to obtain a high flow suction but low depression.
  • the control means constituted by a vacuum intake (63) which will be called a vacuum sensor, and a pressure switch, to determine the level of depression generated, and thus control the passage of the secondary nozzle (20) to be placed in the neutralized position to leave only the main nozzle (10), to obtain a high flow suction but low depression.
  • connection (60) of the suction device (1) to the container (50) is constituted by a female connection portion (61) integral with the suction device (1) intended to cooperate with a connecting male part ( 62a, 62b) secured to the container (50/50 ').
  • the sensor (63) of the pressure switch is disposed inside the female connection part (61) as is illustrated more particularly in FIGS. figures 3 and 4 .
  • the connecting male portion (62a, 62b) comprises a tubular end portion (64a, 64b), the height (H1, H2b) of which is determined to either allow the detection of the depression or the suppression of this detection. .
  • the height (H1) of the tubular end portion (64a) of the connecting male portion (62a) is such that in the connected position as shown in FIG. figure 3 the vacuum sensor (63) is disposed outside the region of the end tubular portion (64a).
  • the height (H2) of the tubular end portion (64b) of the connecting male portion (62b) is such that in the connected position as shown in FIG. figure 4 , the vacuum sensor (63) is disposed in the region of the end tubular portion (64b).
  • the sensor (63) is substantially against the wall of the end tubular wall (64b) which does not allow it to detect the depression generated by the device.
  • two types of male connection (62a, 62b) are provided. Namely a first type (62b) for standard containers that are fragile like oil drums (50 ') ( figure 4 ), in which the end tubular portion (64b) of the male connection (62b) is of high height (H2) so that the vacuum sensor (63) is disposed in the area occupied by this tubular portion (64b) , and a second type (62a) for the stronger containers (50) ( fig.3 ), the type in which the end tubular portion (64a) of the male connection (62a) is of small height (H1) so that the vacuum sensor (63) is disposed outside the zone occupied by this tubular portion (64a). ), to enable detection and act accordingly.
  • a first type (62b) for standard containers that are fragile like oil drums (50 ') figure 4
  • the end tubular portion (64b) of the male connection (62b) is of high height (H2) so that the vacuum sensor (63) is disposed in the area occupied by this tubular
  • the height (H1) of the tubular end portion (64a) of the connection for resistant containers (50) is less than the height (H2) of the tubular end portion (64b) of the male part. the connection (62b) for fragile standard containers (50 ').
  • the diameter (D1) of the thread of the assembly of this connection on the container (50') is different the diameter (D2) of the mounting thread of the connection for the resistant containers (50).
  • the device (1) comprises detection means which enable it to know on which type of container (50/50 ') it is connected and to implement the appropriate type of aspiration.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

La présente invention concerne un dispositif d'aspiration pneumatique, c'est-à-dire à motorisation par air sous pression et effet venturi. Elle concerne plus particulièrement un perfectionnement relatif à un dispositif d'aspiration ayant des moyens de gestion du type d'aspiration.The present invention relates to a pneumatic suction device, that is to say to motorization by air under pressure and venturi effect. It relates more particularly to an improvement relating to a suction device having suction type management means.

Le nettoyage domestique, urbain ou industriel peut être réalisé au moyen de dispositifs d'aspiration plus ou moins complexes. Mais quelle que soit la configuration retenue, il y a essentiellement deux paramètres à maîtriser, à savoir, le débit et la dépression. Ces caractéristiques fonctionnelles doivent être adaptées en fonction de l'application envisagée, et notamment du produit à aspirer.Domestic, urban or industrial cleaning can be achieved by more or less complex suction devices. But whatever the configuration, there are essentially two parameters to control, namely, flow and depression. These functional characteristics must be adapted according to the intended application, and in particular the product to be sucked.

On connaît notamment des dispositifs d'aspiration comme divulgés dans les brevets anterieurs GB 882 518 et FR 843 511 , dits pneumatiques, dans lesquels on utilise la détente d'un gaz sous pression pour créer du vide et, par conséquent, générer un phénomène d'aspiration. Dans la pratique, le gaz sous pression est généralement de l'air comprimé provenant d'un réseau d'alimentation d'usine ou d'un compresseur de chantier, par exemple.Aspiration devices, as disclosed in prior patents, are known in particular. GB 882,518 and FR 843,511 so-called pneumatic, in which the expansion of a gas under pressure is used to create a vacuum and, consequently, to generate a suction phenomenon. In practice, the pressurized gas is generally compressed air from a factory supply network or a compressor site, for example.

Concrètement, l'air comprimé est envoyé dans une tuyère dont la forme interne est adaptée pour engendrer, par effet venturi, une dépression en amont de la section la plus faible de ladite tuyère lorsque l'air comprimé se détend en aval de ladite section. Ce principe étant parfaitement connu, il ne sera pas décrit davantage ici. On rappellera simplement que le débit et la dépression dépendent, bien entendu, de la forme et des dimensions de la tuyère, et notamment de sa section. Dans les faits, avec une tuyère de grandes dimensions, on obtiendra un volume d'air déplacé important mais au prix d'une dépression relativement faible. A contrario, avec une tuyère de dimensions plus réduites, on aura moins de débit mais la dépression sera alors plus forte.Concretely, the compressed air is sent into a nozzle whose internal shape is adapted to generate, by venturi effect, a vacuum upstream of the weakest section of said nozzle when compressed air expands downstream of said section. This principle being perfectly known, it will not be described further here. It will be recalled simply that the flow and the depression depend, of course, the shape and dimensions of the nozzle, and in particular of its section. In fact, with a large nozzle, we obtain a large volume of displaced air but at the cost of a relatively low vacuum. On the other hand, with a nozzle of smaller dimensions, there will be less flow but the depression will then be stronger.

Ce type de dispositif d'aspiration pneumatique présente toutefois l'inconvénient avec une source d'énergie à caractéristiques (pression, débit) stabilisées et constantes, d'avoir des caractéristiques fonctionnelles figées, qui ne constituent qu'un compromis pas forcément bien adapté à l'application envisagée. Ainsi, dans la pratique, on se retrouve souvent avec un dispositif d'aspiration sous capacitaire en dépression et sur capacitaire en débit, ou inversement.This type of pneumatic suction device, however, has the disadvantage with a source of energy characteristics (pressure, flow) stabilized and constant, to have fixed functional characteristics, which are only a compromise not necessarily well suited to the intended application. Thus, in practice, one is often found with a suction device under vacuum and capacity capacity in flow, or vice versa.

Aussi, le problème technique à résoudre, par l'objet de la présente invention, est de proposer un dispositif d'aspiration pneumatique comportant une tuyère, dite principale, à travers laquelle la détente d'un gaz comprimé est apte à générer par réaction une aspiration de débit et de dépression donnée, lequel dispositif d'aspiration pneumatique permet d'éviter les problèmes de l'état de la technique en offrant des capacités d'utilisation sensiblement étendues, notamment au niveau de la nature et de la consistance des produits à aspirer.Also, the technical problem to be solved, by the object of the present invention, is to propose a pneumatic suction device comprising a nozzle, called main, through which the expansion of a compressed gas is able to generate by reaction a suction suction and vacuum given, which pneumatic suction device avoids the problems of the state of the art by offering substantially expanded operating capabilities, including the nature and consistency of products to aspirate.

La solution au problème technique posé consiste, selon la présente invention, en ce que le dispositif d'aspiration pneumatique comporte, en outre, au moins une tuyère secondaire activable par réaction en substitution à la tuyère principale, à travers laquelle la détente du gaz comprimé est apte à générer une aspiration d'un débit inférieur et d'une dépression supérieure respectivement au débit et à la dépression obtenue avec la tuyère principale, et en ce que chaque tuyère secondaire coaxiale à la tuyère principale est montée mobile en déplacement entre une position passive dans laquelle la détente effective du gaz comprimé est opérée dans la tuyère principale et une position active dans laquelle la détente effective du gaz comprimé est opérée par ladite tuyère secondaire.The solution to the technical problem posed consists, according to the present invention, in that the pneumatic suction device comprises, in addition, at least one secondary nozzle which can be activated by reaction in substitution with the main nozzle, through which the expansion of the compressed gas is able to generate a suction of a lower flow and a higher vacuum respectively to the flow rate and the vacuum obtained with the main nozzle, and in that each nozzle coaxial secondary to the main nozzle is movably mounted in displacement between a passive position in which the effective expansion of the compressed gas is operated in the main nozzle and an active position in which the effective expansion of the compressed gas is operated by said secondary nozzle.

On entend par détente effective celle qui est à l'origine de l'aspiration concrètement générée à l'intérieur du dispositif d'aspiration pneumatique.By effective expansion is meant that which is at the origin of the suction concretely generated inside the pneumatic suction device.

Pour le déplacement de chaque tuyère secondaire, toute mobilité peut bien évidement être envisagée.For the displacement of each secondary nozzle, any mobility can of course be considered.

L'invention telle qu'ainsi définie présente l'avantage de pouvoir faire varier les paramètres essentiels de l'aspiration en fonction de l'application envisagée, et notamment de la nature et/ou de la consistance du produit à aspirer.The invention as thus defined has the advantage of being able to vary the essential parameters of the suction depending on the intended application, and in particular the nature and / or consistency of the product to be sucked.

Ainsi, un même dispositif d'aspiration pneumatique est en mesure de collecter efficacement, aussi bien des substances réclamant à la fois un fort débit et une dépression limitée comme, par exemple, des poussières ou des matières pulvérulentes, que des substances exigeant au contraire une dépression importante, quitte à avoir un débit réduit, comme, par exemple, des liquides plus ou moins visqueux.Thus, the same pneumatic suction device is able to collect efficiently, both substances requiring both a high flow and a limited depression such as, for example, dust or powdery materials, substances that require on the contrary a significant depression, even at a reduced flow, such as, for example, more or less viscous liquids.

Toutefois, dans certains cas d'utilisation, même si l'aspiration pourrait être faite avec une grande dépression, il serait nécessaire de ne pas utiliser ce type de dépression. C'est par exemple le cas lorsque le conteneur dans lequel se fait la dépression est un fût de type pétrolier, dont l'épaisseur de la paroi n'est pas suffisante pour n'être pas déformée.However, in some cases of use, even if the aspiration could be done with a great depression, it would be necessary to not use this type of depression. This is for example the case when the container in which the depression is a barrel type oil, whose wall thickness is not sufficient to not be deformed.

L'invention propose un perfectionnement qui permet dans certains cas d'interdire la haute pression pour sauvegarder les fûts correspondants, et ainsi sécuriser l'exploitation.The invention proposes an improvement which in certain cases makes it possible to prohibit the high pressure in order to save the corresponding drums, and thus secure the operation.

La présente invention concerne également les caractéristiques qui ressortiront au cours de la description qui va suivre, et qui devront être considérées isolément ou selon toutes leurs combinaisons techniques possibles.The present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.

Cette description donnée à titre d'exemple non limitatif fera mieux comprendre comment l'invention peut être réalisée, en référence aux dessins annexés sur lesquels :

  • La figure 1 représente schématiquement un dispositif d'aspiration pneumatique conforme à l'invention, dans lequel la tuyère principale est active.
  • La figure 2 est un schéma similaire à celui de la figure 1, mais dans lequel c'est la tuyère secondaire qui est active.
  • Les figures 3 et 4 illustrent un perfectionnement permettant au dispositif de reconnaître sur quel conteneur il est connecté et de proposer une dépression appropriée.
This description, given by way of nonlimiting example, will make it easier to understand how the invention can be realized, with reference to the appended drawings in which:
  • The figure 1 schematically represents a pneumatic suction device according to the invention, wherein the main nozzle is active.
  • The figure 2 is a pattern similar to that of the figure 1 but in which it is the secondary nozzle which is active.
  • The figures 3 and 4 illustrate an improvement enabling the device to recognize which container it is connected to and to propose a suitable depression.

Pour des raisons de clarté, les mêmes éléments ont été désignés par des références identiques. De même, seuls les éléments essentiels pour la compréhension de l'invention ont été représentés, et ceci, sans respect de l'échelle et de manière schématique.For the sake of clarity, the same elements have been designated by identical references. Likewise, only the essential elements for understanding the invention have been represented, and this, without respect for the scale and in a schematic manner.

Les figures 1 et 2 illustrent de manière schématique un dispositif d'aspiration pneumatique (1) fonctionnant à base d'air comprimé à environ 6 à 7 bars, qui est fourni ici par l'intermédiaire de l'arrivée (2). On distingue également la présence de moyens de distribution classiques (3) qui sont chargés de réguler la pression de l'air qui va être admis dans le dispositif d'aspiration pneumatique (1), en vue notamment de maîtriser le niveau de dépression finale pour d'évidentes raisons de sécurité. De manière tout aussi classique, le dispositif d'aspiration pneumatique (1) est doté d'une tuyère (10), dite principale, qui est conformée de façon à ce que la détente de l'air comprimé à travers, elle puisse générer, par réaction dans le conteneur de récupération (50), une aspiration de fort débit et de dépression limitée.The figures 1 and 2 schematically illustrate a pneumatic suction device (1) operating with compressed air at about 6 to 7 bar, which is provided here via the inlet (2). We also distinguish the presence of conventional distribution means (3) which are responsible for regulating the pressure of the air which will be admitted into the pneumatic suction device (1), in particular with a view to controlling the final level of depression for obvious security reasons. In a similar way, the pneumatic suction device (1) is provided with a nozzle (10), called the main nozzle, which is shaped so that the expansion of the compressed air through it can generate, by reaction in the recovery container (50), suction of high flow and limited depression.

Conformément à l'objet de la présente invention, le dispositif d'aspiration pneumatique (1) comporte, en outre, une tuyère secondaire (20) qui est, quant à elle, conformée, de manière à ce que la détente de l'air comprimé à travers, elle soit en mesure d'engendrer, par réaction, une aspiration de faible débit mais de dépression importante. Cette tuyère secondaire (20), coaxiale à la tuyère principale (10), est, par ailleurs, montée mobile en déplacement en translation, entre une position passive (figure 1) où elle a fonction de buse de détente, et dans laquelle la détente effective de l'air comprimé s'effectue via la tuyère principale (10), et une position active (figure 2), dans laquelle la détente effective de l'air comprimé est réalisée par l'intermédiaire de ladite tuyère secondaire (20) ; l'air comprimé à détendre étant acheminé par une buse arrière (200) solidaire dans ses mouvements de la tuyère secondaire (20).According to the object of the present invention, the pneumatic suction device (1) further comprises a secondary nozzle (20) which is, in turn, shaped in such a way that the expansion of the air compressed through it, it is able to generate, by reaction, suction of low flow but significant depression. This secondary nozzle (20), coaxial with the main nozzle (10), is also mounted to move in translation between a passive position ( figure 1 ) where it acts as a pressure relief nozzle, and in which the effective expansion of the compressed air is effected via the main nozzle (10), and an active position ( figure 2 ), wherein the effective expansion of the compressed air is effected through said secondary nozzle (20); the air compressed to relax being conveyed by a rear nozzle (200) integral in its movements of the secondary nozzle (20).

Dans ce mode particulier de réalisation, choisi uniquement à titre d'exemple, la tuyère principale (10) et la tuyère secondaire (20) sont coaxiales. De plus, la tuyère secondaire (20) est montée mobile en translation axiale par rapport à la tuyère principale (10). Mais, bien entendu, d'autres positionnements relatifs et d'autres types de mobilités pourraient parfaitement être envisagés.In this particular embodiment, chosen solely by way of example, the main nozzle (10) and the secondary nozzle (20) are coaxial. In addition, the secondary nozzle (20) is mounted movably in axial translation with respect to the main nozzle (10). But, of course, other relative positioning and other types of mobility could be well envisaged.

Selon une particularité de l'invention, le dispositif d'aspiration pneumatique (1) comporte, par ailleurs, des moyens de déplacement (30) qui sont agencés de manière à pouvoir assurer la mobilité de la tuyère secondaire (20) entre sa position passive (figure 1) et sa position active (figure 2), parfaite et repérée et permettant de satisfaire aux exigences aérauliques "venturi".According to a feature of the invention, the pneumatic suction device (1) further comprises displacement means (30) which are arranged so as to ensure the mobility of the secondary nozzle (20) between its passive position ( figure 1 ) and its active position ( figure 2 ), perfect and spotted and to meet the ventilation requirements "venturi".

De manière particulièrement avantageuse, les moyens de déplacement (30) comportent ici un vérin (31) qui est en mesure de déplacer la tuyère secondaire (20) entre sa position passive (figure 1) et sa position active (figure 2) dans lesquelles ladite tuyère secondaire (20) est disposée respectivement à distance et sensiblement à l'intérieur de la tuyère principale (10). Cette caractéristique permet en quelque sorte de pouvoir neutraliser la tuyère principale (10) de manière réversible, en venant modifier sa section interne par interposition de la tuyère secondaire (20) entre le flux d'air comprimé et ladite tuyère principale (10).Particularly advantageously, the displacement means (30) here comprise a jack (31) which is able to move the secondary nozzle (20) between its passive position ( figure 1 ) and its active position ( figure 2 ) in which said secondary nozzle (20) is disposed respectively at a distance and substantially within the main nozzle (10). This feature allows somehow to be able to neutralize the main nozzle (10) in a reversible manner, by modifying its internal section by interposition of the secondary nozzle (20) between the flow of compressed air and said main nozzle (10).

Dans cet exemple de réalisation, le vérin (31) est composé d'une tige creuse (32) qui est solidaire d'un piston (33) monté coulissant à l'intérieur d'une chambre étanche (34) ; l'extrémité distale de la tige creuse (32) étant solidaire de la tuyère secondaire (20). Par ailleurs, la tige creuse (32) comporte, d'une part, une ouverture d'admission (35) communiquant avec des moyens d'alimentation (4) en air comprimé, et d'autre part, une ouverture d'échappement, constituant une buse de diffusion (36) débouchant directement dans la tuyère secondaire (20). La tige creuse (32) sert ainsi avantageusement de conduit pour amener l'air comprimé jusqu'à l'intérieur du dispositif d'aspiration pneumatique (1) de type "venturi".In this embodiment, the jack (31) is composed of a hollow rod (32) which is integral with a piston (33) slidably mounted inside. a sealed chamber (34); the distal end of the hollow rod (32) being integral with the secondary nozzle (20). Moreover, the hollow rod (32) comprises, on the one hand, an inlet opening (35) communicating with compressed air supply means (4), and on the other hand, an exhaust opening, constituting a diffusion nozzle (36) opening directly into the secondary nozzle (20). The hollow rod (32) thus advantageously serves as a conduit for bringing the compressed air to the inside of the pneumatic suction device (1) of the "venturi" type.

Selon une autre particularité, le dispositif d'aspiration pneumatique (1) comporte des moyens de contrôle (40) qui sont aptes à commander la mise en oeuvre bidirectionnelle des moyens de déplacement (30). Concrètement, les movens de contrôle (40) du niveau de vide dans le conteneur de récupération (50) comportent une valve qui est en mesure d'injecter de l'air sous pression, via la conduite (5), dans la partie active (37) de la chambre (34) du vérin (31), faisant ainsi translater le piston (33), et conséquemment la tuyère secondaire (20), pour générer une dépression plus importante, et ce sans injection d'air comprimé dans la partie active (37) de la chambre (34) du vérin (31), la position stable du piston (33) étant, de fait, la position retirée du vérin.According to another feature, the pneumatic suction device (1) comprises control means (40) which are able to control the bidirectional implementation of the displacement means (30). Concretely, the control means (40) of the vacuum level in the recovery container (50) comprise a valve which is able to inject air under pressure, via the pipe (5), into the active part ( 37) of the chamber (34) of the cylinder (31), thus translating the piston (33), and consequently the secondary nozzle (20), to generate a greater vacuum, and without injection of compressed air in the part active (37) of the chamber (34) of the cylinder (31), the stable position of the piston (33) being, in fact, the withdrawn position of the cylinder.

Conformément à une autre caractéristique, les moyens de contrôle (40) sont, en outre, aptes à déterminer le niveau de la dépression générée à l'intérieur du dispositif d'aspiration pneumatique (1). Dans la pratique, les moyens de contrôle (40) communiquent avec l'intérieur du dispositif d'aspiration pneumatique (1) par l'intermédiaire d'un conduit (6).According to another characteristic, the control means (40) are furthermore capable of determining the level of the depression generated inside the pneumatic suction device (1). In practice, the control means (40) communicate with the inside of the pneumatic suction device (1) via a conduit (6).

De manière particulièrement avantageuse, les moyens de contrôle (40) sont aptes à commander automatiquement la mise en oeuvre des moyens de déplacement (30) lorsque la dépression à l'intérieur du dispositif d'aspiration pneumatique (1) dépasse une valeur seuil prédéterminée ou retombe en deçà de cette valeur seuil après fonctionnement à haute dépression.In a particularly advantageous manner, the control means (40) are able to automatically control the implementation of the displacement means (30) when the vacuum inside the pneumatic suction device (1) exceeds a predetermined threshold value or falls below this threshold value after operation at high vacuum.

Ainsi qu'on peut le voir sur la figure 1, dans la pratique, le dispositif d'aspiration pneumatique (1) est configuré par défaut pour fonctionner avec la tuyère principale (10) ; la tuyère secondaire (20) étant en position passive. L'air comprimé en provenance de l'arrivée (2) (flèche f1) est admis dans le système (flèche f2) sous contrôle des moyens de distribution (3). L'air comprimé arrive ensuite (flèche f3) via le conduit (4) dans la partie passive (38) de la chambre (34) du vérin (31). Il passe alors par l'ouverture d'admission (35) dans la tige creuse (32) qu'il traverse (flèche f4) jusqu'à déboucher dans la tuyère secondaire (20) via la buse (36), dont la fonction détente est neutralisée en position arrière. En raison de sa grande vitesse de déplacement, l'air comprimé est quasiment injecté (flèche f5) dans la tuyère principale (10) qui est avantageusement positionnée dans son axe. Une fois arrivé dans la tuyère principale (10), le gaz sous pression peut alors se détendre complètement (flèche f6) puisque l'ouverture (11) de ladite tuyère principale (10) donne sur l'extérieur. La dépression (flèche f7) qui est créée à l'intérieur du dispositif d'aspiration pneumatique (1) s'étend alors à un conteneur de récupération (50) pourvu d'un suceur d'aspiration (51). Le phénomène d'aspiration qui est alors engendré à l'extrémité du suceur d'aspiration (51) (flèche f8) permet d'aspirer de la matière (100) qui va s'accumuler avantageusement dans le conteneur de récupération (50).As can be seen on the figure 1 in practice, the pneumatic suction device (1) is configured by default to operate with the main nozzle (10); the secondary nozzle (20) being in the passive position. The compressed air coming from the inlet (2) (arrow f1) is admitted into the system (arrow f2) under the control of the distribution means (3). The compressed air then arrives (arrow f3) via the conduit (4) in the passive part (38) of the chamber (34) of the cylinder (31). It then passes through the inlet opening (35) in the hollow rod (32) which it passes through (arrow f4) until it opens into the secondary nozzle (20) via the nozzle (36), whose function of relaxation is neutralized in the rear position. Because of its high speed of movement, the compressed air is almost injected (arrow f5) in the main nozzle (10) which is advantageously positioned in its axis. Once arrived in the main nozzle (10), the pressurized gas can then fully relax (arrow f6) since the opening (11) of said main nozzle (10) is on the outside. The depression (arrow f7) which is created inside the pneumatic suction device (1) then extends to a recovery container (50) provided with a suction nozzle (51). The suction phenomenon that is then generated at the end of the suction nozzle (51) (arrow f8) allows to suck material (100) which will accumulate advantageously in the recovery container (50).

Lorsque, par exemple, pour des raisons d'obturation et de difficulté d'aspiration, le niveau de dépression à l'intérieur du dispositif d'aspiration pneumatique (1) atteint une valeur seuil prédéterminée, les moyens de contrôle (40) vont en être informés grâce à la présence du conduit (6). Conformément à la figure 2, les moyens de contrôle (40) vont alors commander la mise en oeuvre des moyens de déplacement (30) afin d'activer la tuyère secondaire (20). Pour cela, de l'air comprimé va être injecté via la conduite (5) (flèche f9) dans la partie active (37) de la chambre (34) du vérin (31), ce qui va entraîner le déplacement du piston (33). La tuyère secondaire (20) va, par conséquent, se translater en direction de la tuyère principale (10), jusqu'à sa position active. L'air comprimé, qui circule toujours notamment dans la conduite (4), dans la partie passive (38) de la chambre (34) et dans la tige creuse (32), va alors se détendre au niveau de la tuyère secondaire (20) dont le positionnement rend inopérant la tuyère principale (10). En raison de la configuration interne particulière de la tuyère secondaire (20), la dépression, alors générée est beaucoup plus importante, même si le débit a, lui, diminué. Cela permet avantageusement de poursuivre l'aspiration de manière efficace, à haute dépression, même si la nature rend cette opération, à priori, difficile. Dès que le niveau de dépression dans le conteneur (50) redescend, suite à la désobstruction grâce à la haute dépression, les moyens de contrôle changent d'état et donnent ordre à la tuyère secondaire (20) de reprendre sa position neutralisée initiale pour laisser active seule la tuyère principale (10) permettant alors l'aspiration à grand débit de reprendre.When, for example, for reasons of closure and difficulty of aspiration, the level of depression inside the suction device pneumatic (1) reaches a predetermined threshold value, the control means (40) will be informed through the presence of the conduit (6). In accordance with the figure 2 , the control means (40) will then control the implementation of the displacement means (30) to activate the secondary nozzle (20). For this, compressed air will be injected via the pipe (5) (arrow f9) into the active part (37) of the chamber (34) of the cylinder (31), which will cause the displacement of the piston (33). ). The secondary nozzle (20) will, therefore, translate towards the main nozzle (10) to its active position. The compressed air, which always circulates in particular in the pipe (4), in the passive part (38) of the chamber (34) and in the hollow rod (32), will then relax at the secondary nozzle (20). ) whose positioning renders inoperative the main nozzle (10). Because of the particular internal configuration of the secondary nozzle (20), the depression, then generated is much larger, even if the flow has, him, decreased. This advantageously allows to continue sucking effectively, high depression, even if the nature makes this operation, a priori, difficult. As soon as the level of depression in the container (50) goes down, following the désobstruction thanks to the high depression, the control means change state and instruct the secondary nozzle (20) to return to its initial neutralized position to leave activates only the main nozzle (10), allowing the high-speed suction to resume.

La présente invention concerne un perfectionnement qui permet d'interdire le passage de l'aspiration à la haute pression lorsque cela est rendu nécessaire. C'est par exemple le cas d'aspiration réalisée dans un fût de type pétrolier (50') dont les parois sont de faible épaisseur.The present invention relates to an improvement which makes it possible to prohibit the passage of suction at the high pressure when this is necessary. This is for example the case of suction made in a barrel type oil (50 ') whose walls are thin.

A cet effet le dispositif comprend des moyens permettant d'interdire la haute pression et plus particulièrement d'interdire au moyens de contrôle (40) constitués par une prise de vide (63) que l'on appellera capteur de dépression, et d'un pressostat, de déterminer le niveau de dépression générée, et ainsi commander le passage de la tuyère secondaire (20) de se placer en position neutralisée pour laisser seule la tuyère principale (10), permettant d'obtenir une aspiration à grand débit mais à faible dépression.For this purpose the device comprises means for prohibiting the high pressure and more particularly to prohibit the control means (40) constituted by a vacuum intake (63) which will be called a vacuum sensor, and a pressure switch, to determine the level of depression generated, and thus control the passage of the secondary nozzle (20) to be placed in the neutralized position to leave only the main nozzle (10), to obtain a high flow suction but low depression.

Notons, la connexion (60) du dispositif d'aspiration (1) au conteneur (50) est constituée par une partie femelle de connexion (61) solidaire du dispositif d'aspiration (1) destinée à coopérer avec une partie mâle de connexion (62a, 62b) solidaire du conteneur (50/50').Note, the connection (60) of the suction device (1) to the container (50) is constituted by a female connection portion (61) integral with the suction device (1) intended to cooperate with a connecting male part ( 62a, 62b) secured to the container (50/50 ').

Afin de permettre la détection de la dépression ou ne pas la détecter, le capteur (63) du pressostat est disposé à l'intérieur de la partie femelle de connexion (61) tel que cela est illustré plus particulièrement aux figures 3 et 4.In order to allow the detection of the depression or not to detect it, the sensor (63) of the pressure switch is disposed inside the female connection part (61) as is illustrated more particularly in FIGS. figures 3 and 4 .

Par ailleurs, la partie mâle de connexion (62a, 62b) comprend une partie tubulaire d'extrémité (64a, 64b), dont la hauteur (H1, H2) est déterminée pour soit permettre la détection de la dépression soit la suppression de cette détection.Moreover, the connecting male portion (62a, 62b) comprises a tubular end portion (64a, 64b), the height (H1, H2b) of which is determined to either allow the detection of the depression or the suppression of this detection. .

Ainsi pour permettre la détection de la dépression, la hauteur (H1) de la partie d'extrémité tubulaire (64a) de la partie mâle de connexion (62a) est telle qu'en position connectée telle que représenté à la figure 3, le capteur de dépression (63) est disposé hors de la zone de la partie tubulaire d'extrémité (64a). Par contre pour qu'il n'y ait pas détection de la dépression, la hauteur (H2) de la partie d'extrémité tubulaire (64b) de la partie mâle de connexion (62b), est telle qu'en position connectée telle que représenté à la figure 4, le capteur de dépression (63) est disposé dans la zone de la partie tubulaire d'extrémité (64b). Ainsi, dans cette position le capteur (63) est sensiblement contre la paroi de la paroi tubulaire d'extrémité (64b) ce qui ne lui permet pas de détecter la dépression générée par le dispositif.Thus to enable the detection of the depression, the height (H1) of the tubular end portion (64a) of the connecting male portion (62a) is such that in the connected position as shown in FIG. figure 3 the vacuum sensor (63) is disposed outside the region of the end tubular portion (64a). By cons for there is no detection of depression, the height (H2) of the tubular end portion (64b) of the connecting male portion (62b) is such that in the connected position as shown in FIG. figure 4 , the vacuum sensor (63) is disposed in the region of the end tubular portion (64b). Thus, in this position the sensor (63) is substantially against the wall of the end tubular wall (64b) which does not allow it to detect the depression generated by the device.

En conséquence au dispositif d'aspiration (1) deux types de connexion mâle (62a, 62b) sont prévus. A savoir un premier type (62b) pour les conteneurs standards qui sont fragiles comme les fûts pétroliers (50') (figure 4), type selon lequel la partie tubulaire d'extrémité (64b) de la connexion mâle (62b) est de grande hauteur (H2) afin que le capteur de dépression (63) soit disposé dans la zone occupée par cette partie tubulaire (64b), et un deuxième type (62a) pour les conteneurs plus résistants (50) (fig.3), type selon lequel la partie tubulaire d'extrémité (64a) de la connexion mâle (62a) est de petite hauteur (H1) afin que le capteur de dépression (63) soit disposé hors de la zone occupée par cette partie tubulaire (64a), afin de permettre la détection et agir en conséquence.As a result of the suction device (1) two types of male connection (62a, 62b) are provided. Namely a first type (62b) for standard containers that are fragile like oil drums (50 ') ( figure 4 ), in which the end tubular portion (64b) of the male connection (62b) is of high height (H2) so that the vacuum sensor (63) is disposed in the area occupied by this tubular portion (64b) , and a second type (62a) for the stronger containers (50) ( fig.3 ), the type in which the end tubular portion (64a) of the male connection (62a) is of small height (H1) so that the vacuum sensor (63) is disposed outside the zone occupied by this tubular portion (64a). ), to enable detection and act accordingly.

On a compris que la hauteur (H1) de la partie tubulaire d'extrémité (64a) de la connexion pour conteneurs résistants (50) est inférieure à la hauteur (H2) de la partie tubulaire d'extrémité (64b) de la partie mâle de la connexion (62b) pour conteneur standards fragiles (50').It is understood that the height (H1) of the tubular end portion (64a) of the connection for resistant containers (50) is less than the height (H2) of the tubular end portion (64b) of the male part. the connection (62b) for fragile standard containers (50 ').

Par ailleurs afin de ne pas permettre de monter sur un conteneur standard fragile (50') une connexion de type permettant la détection de la dépression, le diamètre (D1) du filetage du montage de cette connexion sur le conteneur (50') est différent du diamètre (D2) du filetage du montage de la connexion destinée aux conteneurs résistants (50).Moreover, in order not to make it possible to mount on a fragile standard container (50 ') a connection of a type enabling the detection of the vacuum, the diameter (D1) of the thread of the assembly of this connection on the container (50') is different the diameter (D2) of the mounting thread of the connection for the resistant containers (50).

En d'autres termes le dispositif (1) comprend des moyens de détection qui lui permettent de connaître sur quel type de conteneur (50/50') il est connecté et de mettre en oeuvre le type d'aspiration approprié.In other words, the device (1) comprises detection means which enable it to know on which type of container (50/50 ') it is connected and to implement the appropriate type of aspiration.

Claims (13)

  1. Pneumatic suction device (1) intended to be connected to a container (50/50'), comprising a so-called main nozzle (10) through which the expansion of a compressed gas is able to generate by reaction a suction with a given flowrate and given negative pressure; said device (1) comprising a secondary nozzle (20) through which the expansion of the compressed gas is able to generate by reaction a suction with a flowrate less than and a negative pressure greater than the flowrate and negative pressurerespectively obtained with the main nozzle (10); characterised in that the secondary nozzle (20) is mounted so as to be able to move axially with respect to the main nozzle (10) between a passive position in which the effective expansion of the compressed gas is effected by the main nozzle (10), and an active position in which the effective expansion of the compressed gas is effected by said secondary nozzle (20); in that the device (1) comprises control means (40) for determining the negative pressure generated and able to control the means (30) for moving the secondary nozzle (20); and in that the device (1) comprises detection means that enable it to determine to what type of container (50/50') it is connected and to implement the appropriate type of suction in order to make safe the operation.
  2. Suction device (1) according to claim 1, characterised in that it comprises prohibition means, for prohibiting high pressure, and more particularly for prohibiting the control means (40) from determining the level of negative pressure generated and thus to control the passage of the secondary nozzle (20) to be placed in the passive position in order to leave the main nozzle (10) alone, making it possible to obtain suction at high flowrate but at low negative pressure
  3. Suction device (1) according to the preceding claim, characterised in that the control means (40) consist of a negative-pressure sensor (63).
  4. Suction device (1) according to the preceding claim, characterised in that the suction device (1) is connected to the container (50/50') by means of a connection (60) consisting of a female part (61) secured to the suction device intended to cooperate with a male part (62a/62b) secured to the container (50/50'), while the negative-pressure sensor (63) is placed inside the female connection part (61).
  5. Suction device (1) according to the preceding claim, characterised in that two types of male connection (62a/62b) are provided at the suction device (1), namely a first type (62b) for fragile standard containers (50'), such as oil barrels, a type according to which a tubular end part (64b) of the male connection (62b) has a height (H2) such that the negative-pressure sensor (63) is placed in the region occupied by this tubular part, and a second type (62a) for stronger containers (50), a type according to which a tubular end part (64a) of the male connection (62a) has a small height (H1) such that the negative-pressure sensor (63) is placed outside the region occupied by this tubular part (64a).
  6. Suction device (1) according to the preceding claim, characterised in that, in order to enable the negative pressure to be detected, the height (H1) of the tubular end part (64a) of the male connection part (62a) is such that, in the connected position, the negative-pressure sensor (63) is placed outside the region of the tubular end part (64a) while, so that there is no detection of negative pressure, the height (H2) of the tubular end part (64b) of the male connection part (62b) is such that in the connected position the negative-pressure sensor (63) is placed in the region of the tubular end part.
  7. Suction device (1) according to the preceding claim, characterised in that, in order not to make it possible to mount, on a fragile container (50'), a connection of the type enabling detection of negative pressure (62a), the diameter (D1) of the thread for mounting this connection (62b) on the container (50') is different from the diameter (D2) of the thread for mounting the connection (62a) intended for the standard container (50)
  8. Pneumatic suction device (1) according to any one of the preceding claims, characterised in that the movement means (30) provide the mobility of each secondary nozzle (20) between its passive position and its active position.
  9. Pneumatic suction device (1) according to claim 8, characterised in that the movement means (30) comprise a cylinder (31) that is able to move the secondary nozzle (20) between its passive position and its active position in which said secondary nozzle (20) is placed respectively at a distance from and substantially inside the main nozzle (10).
  10. Pneumatic suction device (1) according to a claim 9, characterised in that the cylinder (31) is provided with a hollow rod (32) comprising firstly an inlet opening (35) communicating with compressed-gas supply means (4) and secondly an exhaust opening (36) emerging directly in the secondary nozzle (20).
  11. Pneumatic suction device (1) according to any one of claims 1 to 6, characterised in that the control means (40) control both directions of use of the movement means (30).
  12. Pneumatic suction device (1) according to claim 11, characterised in that the control means (40) control both directions of use of the movement means (30) when the negative pressure inside the pneumatic suction device (1) reaches a predetermined threshold value.
  13. Pneumatic suction device (1) according to any one of the preceding claims, characterised in that the energy source is compressed air.
EP10717702.4A 2009-04-01 2010-03-31 Pneumatic suction device Active EP2413759B1 (en)

Applications Claiming Priority (2)

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FR0901605A FR2943931B1 (en) 2009-04-01 2009-04-01 IMPROVEMENT FOR PNEUMATIC SUCTION DEVICE
PCT/FR2010/050612 WO2010112773A1 (en) 2009-04-01 2010-03-31 Pneumatic suction device

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EP2413759A1 EP2413759A1 (en) 2012-02-08
EP2413759B1 true EP2413759B1 (en) 2015-10-14

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DE217473C (en) *
CH157638A (en) * 1931-11-26 1932-10-15 Wildi Jakob Vacuum cleaner with piston pump.
FR843511A (en) * 1938-08-09 1939-07-05 Dust extractor
GB882518A (en) * 1957-02-02 1961-11-15 Norman John Hudson Suction cleaning apparatus

Also Published As

Publication number Publication date
FR2943931A1 (en) 2010-10-08
FR2943931B1 (en) 2011-04-29
EP2413759A1 (en) 2012-02-08
WO2010112773A1 (en) 2010-10-07

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