EP1387708A1 - Automatic-lung regulator for compressed-air respiration apparatus - Google Patents

Automatic-lung regulator for compressed-air respiration apparatus

Info

Publication number
EP1387708A1
EP1387708A1 EP02719678A EP02719678A EP1387708A1 EP 1387708 A1 EP1387708 A1 EP 1387708A1 EP 02719678 A EP02719678 A EP 02719678A EP 02719678 A EP02719678 A EP 02719678A EP 1387708 A1 EP1387708 A1 EP 1387708A1
Authority
EP
European Patent Office
Prior art keywords
lever
regulator
shut
regulator according
spring
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
EP02719678A
Other languages
German (de)
French (fr)
Other versions
EP1387708B9 (en
EP1387708B1 (en
Inventor
Carsten Leuschner
Jan Martin
Werner Meis
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.)
MSA Auer GmbH
Original Assignee
MSA Auer GmbH
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
Application filed by MSA Auer GmbH filed Critical MSA Auer GmbH
Publication of EP1387708A1 publication Critical patent/EP1387708A1/en
Application granted granted Critical
Publication of EP1387708B1 publication Critical patent/EP1387708B1/en
Publication of EP1387708B9 publication Critical patent/EP1387708B9/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B31/00—Containers or portable cabins for affording breathing protection with devices for reconditioning the breathing air or for ventilating, in particular those that are suitable for invalids or small children

Definitions

  • the invention relates to a regulator for compressed air breathing apparatus, with a membrane loaded to achieve an overpressure by a compression spring and actuated by breathing to control a valve for the air supply and a shut-off lever for locking the membrane in a break in operation.
  • Regulators of this type have been known for a long time. They are connected between the pressure reducing valve of a compressed air reservoir and the breathing mask of a user and are used to provide a certain amount of breathing air at a pressure suitable for the human organism.
  • the valve for releasing the air supply from the pressure reducer into the regulator is actuated with the aid of a control membrane which is moved when the user inhales due to the negative pressure generated.
  • a constant slight overpressure is created in the regulator.
  • the known excess pressure is known - Regulators equipped with a manually operated locking mechanism, in which the control membrane counteracts against the spring force acting on this in its upper position.
  • This locking mechanism consists of a locking lever pivotable about an axis of rotation, one end of which engages the membrane and holds it in the upper position, while the opposite end is locked in the groove of a leaf spring.
  • the invention is therefore based on the object of designing the switching mechanism for blocking and releasing the air supply in a regulator of the type mentioned at the outset in such a way that it is easily released by the inhalation of the user, but the locking position is safe during an interruption in the event of mechanical vibrations is maintained.
  • the object is achieved with a lung automat designed according to the features of patent claim 1.
  • the basic idea of the invention consists, on the one hand, in the arrangement of a first spring element, which acts on the pivotable lever fastening molded body with little friction. This spring element is able to securely fix the shut-off lever to a stop during operation of the regulator, and thus does not prevent the membrane from moving freely.
  • the lever mounting body is additionally locked behind a second spring element with the support of the first spring element.
  • this second spring element can be moved to a limited extent in the longitudinal direction in such a way that it shakes the lever fastening molded body even more during inactivable vibrations of the regulator and fixes it even better.
  • the second spring element is moved upwards again when inhaled through the molded body without noticeable resistance. Thereafter, the spring forces acting on the molded body of the first and second spring elements can be easily overcome by inhalation.
  • the proposed switching mechanism ensures that the air supply is reliably blocked during breaks in operation, since the blocking lever in the blocking position cannot be released even by blows acting on the regulators. This prevents the unwanted outflow of air.
  • the locking lever can be immediately brought back into the operating position by breathing in, since the second spring element can be easily moved by the molded body and then only minimal spring forces have to be overcome to finally release the locking lever are.
  • the shut-off lever is also securely fixed by the first spring element.
  • the first spring element is a leaf spring loaded in the longitudinal direction, which is supported with low friction on its narrow end faces in a groove of the lever fastening molded body and in a groove on a fixed part of the regulator.
  • the second spring element (safety bracket) comprises a movably guided slide rail which has a detent spring element on the side of the shaped lever fastening body.
  • the detent spring element consists of an approximately semicircular receiving part for covering the lever fastening molded body and a bevel for lifting the second spring element when switching into the locking position.
  • a stop bracket is provided at the other end of the slide rail to limit the longitudinal movement of the second spring element (safety bracket) in both directions.
  • the shaped lever attachment body has a rounded sliding surface in the locking area with the detent spring element in order to be able to move the second spring element easily by its rotational movement along the slope or in the receiving part.
  • FIG. 1 to 5 show in a schematic representation the different switching positions of a switching mechanism for a positive pressure regulator.
  • Fig. 1 shows the switching mechanism in the manually locked but unloaded position
  • FIG. 2 shows the switching mechanism according to FIG. 1 in a position which is still blocked for air supply after a shock due to impact.
  • Fig. 3 shows the switching mechanism after breathing in and during operation
  • Fig. 4 shows the switching mechanism when switching off by manual operation
  • the switching mechanism comprises a pivotably mounted shut-off lever 1 which, in the upper position, for example shown in FIG. 1, has a stop for an overpressure spring (not shown) which is under constant action, with a formed by the breathing membrane (not shown) connected membrane plate 2.
  • This membrane plate 2 is connected via a lever system (not shown) to a closing mechanism for a valve 3, via which the air supply from a compressed air reservoir with a pressure reducer (not shown) is released or blocked.
  • the shut-off lever 1 is constantly in the lower position shown in FIG. 3 and is resiliently held under the action of a leaf spring 4 at a stop formed by the valve 3.
  • the membrane plate 2 can move downward (in the direction of the shut-off lever 1 held at the valve stop) under the effect of the negative pressure generated with each breath. After each breath, the membrane plate 2 connected to the membrane is pushed up again and the valve 3 is closed, so that the desired overpressure in the regulator is maintained by the overpressure spring acting on the membrane plate 2 from above.
  • the shut-off lever 1 is connected to a shaped lever attachment body 5 which is pivotably mounted in a swivel joint 6.
  • the shaped body 5, in cooperation with the locking spring 4, serves to hold the shut-off lever 1 either in the lower position, ie in the operating position, or to fix it in the upper position, in which the air supply is completely blocked.
  • the leaf spring 4 has a central bulge 4a and is held and supported under spring tension on its two front edges in a wedge-shaped groove 7 of the lever fastening molded body 5 or in a wedge-shaped groove 8 of a guide element 9.
  • This design and arrangement of the locking spring 4 ensures a low-friction movement of the shut-off lever 1, so that when the regulator is put into operation from the locked position only insignificant Opposing forces are to be overcome and the shut-off lever 1 is moved into the under position, ie the operating position, by just breathing on.
  • the shutdown of the regulator ie the interruption of any air supply, is achieved with the aid of a push button attached to the regulator housing, which is indicated by the arrow F in FIG. 4.
  • the pushbutton is actuated, the molded body 5 is brought into the substantially vertical position shown in FIG. 1 and held in this position on the one hand by the leaf spring 4 and additionally by the safety holder 10.
  • a safety bracket 10 is provided in addition to the leaf spring 4.
  • This safety bracket 10 comprises a slide rail 11, a stop bracket 12 provided at the lower end of the slide rail 11 and a latching spring element 13 angled at the upper end of the slide rail 11.
  • the slide rail 11 is guided in the guide element 9 at a distance from the swivel joint 6 of the lever fastening molded body 5 and Movable according to the arrow A in accordance with the distance between the guide element 9 and a stop 14 formed by the housing of the regulator.
  • the detent spring element 13 is formed by a receptacle part 13a adjoining the slide rail 11, which is curved in a semi-circular manner, and a bevel 13b projecting obliquely upward from its end.
  • the shut-off lever 1 is thus fixed in the locked position both by the leaf spring 4 and by the safety bracket 10.
  • the shut-off lever 1 cannot also adjust itself automatically as a result of a shock caused by impact, since in this case the safety holder 10 slides down to the stop due to its own weight and the lever fastening molded body 5 is locked even more securely in the receiving part 13a.
  • the regulator can be put back into operation simply by breathing in, since, due to the pressure acting on the diaphragm plate 2, the safety bracket 10 can be easily pushed against the guide element 9 until the stop bracket 12 stops shifted above and then the spring force of the detent spring element 13 and the leaf spring 4 is overcome.
  • the safe shut-off of the air supply is ensured on the one hand, so that no air can be lost from the compressed air reservoir. Nevertheless, an immediate restart of the regulator connected to the breathing apparatus is possible, since with the proposed switching mechanism the forces acting to hold the shut-off lever can be overcome by just breathing on. NEN. In the operating position, the shut-off lever 1 is also held securely in a lower stop position.
  • the shut-off lever 1 has been moved upward into the blocking position according to arrow B and acts (arrow C) on the membrane plate 2. The air supply is thus blocked.
  • the safety bracket 10 is in the upper position delimited by the stop bracket 12.
  • Fig. 3 shows the switching mechanism in the operating position, in which the shut-off lever 1 is held firmly by means of the leaf spring 4 against a stop (not shown) and the membrane plate 2 actuated by inhalation for opening and closing the valve 3 for the air supply to Users can freely move up and down.
  • Fig. 4 finally shows the shutdown of the regulator.
  • the shut-off lever (1) is moved in the direction of arrow B by means of the pushbutton (arrow F) and the safety holder 10 is moved along the slope by the movement of the lever fastening molded body 5
  • Fig. 5 shows the start-up of the regulator, in which the safety bracket 10 is raised to the stop on the guide element 5 and then by the breathing in of the user and the resulting pressure of the membrane plate 2 according to arrow C on the locking lever 1 moving in the direction of arrow B. the spring force of the detent spring element 13 and the leaf spring 4 can be easily overcome.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The invention relates to an automatic-lung regulator for compressed-air respiration apparatus, comprising a diaphragm (2) that can be actuated by respiration for controlling the air supply. Said regulator has a fixing moulded body (5) on a locking lever (1) for locking the diaphragm in an operating phase, said body being maintained in a release or locking position by a first spring element (4). A second spring element (10), which can be displaced in a longitudinal direction in a limited manner, acts as a safety fixing element in order to reinforce the locking action of the locking lever, when the automatic-lung regulator is subjected to external mechanical influences.

Description

Beschreibung description
Lungenautomat für Pressluft-AtemgerätβRegulator for compressed air breathing apparatus
Die Erfindung betrifft einen Lungenautomat für Pressluft- atemgeräte, mit einer zur Erzielung eines Überdrucks durch eine Druckfeder belasteten und durch die Atmung betätigten Membran zur Steuerung eines Ventils für die Luftzufuhr sowie einen Absperrhebel zum Arretieren der Membran in einer Betriebspause.The invention relates to a regulator for compressed air breathing apparatus, with a membrane loaded to achieve an overpressure by a compression spring and actuated by breathing to control a valve for the air supply and a shut-off lever for locking the membrane in a break in operation.
Lungenautomaten dieser Art sind seit langem bekannt. Sie sind zwischen das Druckreduzierventil eines Preßluftreservoirs und die Atemschutzmaske eines Benutzers geschaltet und dienen der Bereitstellung einer bestimmten Atemluftmenge mit einem für den menschlichen Organismus geeigneten Druck. Die Betätigung des Ventils zur Freigabe der Luftzufuhr vom Druckminderer in den Lungenautomat erfolgt mit Hilfe einer beim Einatmen durch den Benutzer aufgrund des erzeugten Unterdrucks bewegten Steuermembran. Bei der Überdruckvariante eines Lungenautomaten wird unter der Wirkung eine auf die gegenüberliegende Membranfläche ausgeübten Federkraft ein ständiger leichter Überdruck im Lungenautomaten geschaffen.Regulators of this type have been known for a long time. They are connected between the pressure reducing valve of a compressed air reservoir and the breathing mask of a user and are used to provide a certain amount of breathing air at a pressure suitable for the human organism. The valve for releasing the air supply from the pressure reducer into the regulator is actuated with the aid of a control membrane which is moved when the user inhales due to the negative pressure generated. In the overpressure variant of a regulator, under the effect of a spring force exerted on the opposite membrane surface, a constant slight overpressure is created in the regulator.
Um bei einem Überdruck-Lungenautomaten das weitere Ab- strömen von Luft nach dessen Lösen von der Atemschutzmaske bzw. nach Abnehmen der Atemschutzmaske vom Kopf des Benutzers zu verhindern oder damit nach dem Anschließen an eine Druckluftversorgung nicht sofort Luft frei abströmen kann, sind die bekannten Überdruck- Lungenautomaten mit einem manuell betätigbaren Sperrmechanismus ausgestattet, bei dem die Steuermembran entge- gen der auf diese wirkenden Federkraft in ihrer oberen Position gehalten wird. Dieser Sperrmechanismus besteht aus einem um eine Drehachse schwenkbaren Arretierhebel, dessen eines Ende an der Membran angreift und diese in der oberen Lage hält, während das gegenüberliegende Ende in der Nut einer Blattfeder verrastet ist. Wenn über das Pressluftatemgerät nach dem Anlegen der Atemschutzmaske bzw. dem Anschließen des Lungenautomaten dem Benutzer wieder Luft zugeführt werden soll, bewirkt bereits der durch das Anatmen erzeugte Unterdruck und die dabei durch die Steuermembran auf den Arretierhebel ausgeübte Kraft, dass das andere Hebelende aus der Federrast gelöst wird und der Lungenautomat wieder betriebsfähig ist. Dem angestrebten, bereits durch das Einatmen bewirkten leichten Freigeben des Arretierhebels steht jedoch der Nachteil entgegen, dass sich der Arretierhebel ebenso leicht durch mechanische Einwirkung auf den Lungenautomaten löst, so dass in von dem Benutzer gelöster Lage des Lungenautomaten unkontrolliert Pressluft ausströmen kann und bei der erneuten Benutzung des Pressluftatemgerätes nicht zur Verfügung steht.In order to prevent the further outflow of air in a positive pressure regulator, after it has been released from the respirator or after the respirator has been removed from the head of the user, or so that air cannot flow away freely immediately after being connected to a compressed air supply, the known excess pressure is known - Regulators equipped with a manually operated locking mechanism, in which the control membrane counteracts against the spring force acting on this in its upper position. This locking mechanism consists of a locking lever pivotable about an axis of rotation, one end of which engages the membrane and holds it in the upper position, while the opposite end is locked in the groove of a leaf spring. If air is to be returned to the user via the compressed air breathing apparatus after the respirator mask has been put on or the pulmonary automat has been connected, the negative pressure generated by the breathing in and the force exerted on the locking lever by the control membrane cause the other end of the lever to spring out is solved and the regulator is operational again. However, the desired release of the locking lever already caused by inhalation is countered by the disadvantage that the locking lever can be released just as easily by mechanical action on the regulator, so that compressed air can flow out in an uncontrolled manner in the position of the regulator released by the user and when renewed Use of the compressed air breathing apparatus is not available.
Der Erfindung liegt daher die Aufgabe zugrunde, bei einem Lungenautomaten der eingangs erwähnten Art den Umschaltmechanismus zum Sperren und Freigeben der Luftzufuhr so auszubilden, dass dieser zwar leicht durch das Einatmen des Benutzers gelöst wird, aber die Verriegelungsposition während einer Betriebsunterbrechung bei mechanischen Er- schütterungen sicher beibehalten wird.The invention is therefore based on the object of designing the switching mechanism for blocking and releasing the air supply in a regulator of the type mentioned at the outset in such a way that it is easily released by the inhalation of the user, but the locking position is safe during an interruption in the event of mechanical vibrations is maintained.
Erfindungsgemäß wird die Aufgabe mit einem gemäß den Merkmalen des Patentanspruches 1 ausgebildeten Lungenau- tomaten gelöst. Der Grundgedanke der Erfindung besteht mit anderen Worten zum einen in der Anordnung eines mit geringer Reibung an dem schwenkbaren Hebelbefestigungsformkörper angreifenden ersten Federelement. Dieses Federelement ist in der Lage, den Absperrhebel während des Betriebes des Lungenautomaten an einem Anschlag sicher zu fixieren, und steht damit der freien Beweglichkeit der Membran nicht entgegen. Beim manuellen Umlegen des Absperrhebels in die Sperrposition während einer Betriebsunterbrechung wird der Hebelbefestigungs ormkörper mit Unterstützung des ersten Federelements hinter einem zweiten Federelement zusätzlich verrastet. Dieses zweite Federelement ist jedoch in Längsrichtung in begrenztem Maße so beweglich, dass es sich bei in Betriebspausen unvermeidlichen Erschütterungen des Lungenautomaten den Hebelbefestigungsformkörper noch weiter überdeckt und diesen noch besser fixiert. Bei der erwähnten Inbetriebnahme des Lungenautomaten wird das zweite Federelement beim Einatmen durch den Formkörper ohne merklichen Widerstand wieder nach oben bewegt. Danach können die auf den Formkörper wirkenden Federkräfte des ersten und zweiten Federelements durch das Einatmen leicht überwunden werden.According to the invention, the object is achieved with a lung automat designed according to the features of patent claim 1. In other words, the basic idea of the invention consists, on the one hand, in the arrangement of a first spring element, which acts on the pivotable lever fastening molded body with little friction. This spring element is able to securely fix the shut-off lever to a stop during operation of the regulator, and thus does not prevent the membrane from moving freely. When the locking lever is manually switched into the locking position during an interruption in operation, the lever mounting body is additionally locked behind a second spring element with the support of the first spring element. However, this second spring element can be moved to a limited extent in the longitudinal direction in such a way that it shakes the lever fastening molded body even more during inactivable vibrations of the regulator and fixes it even better. When the regulator is put into operation, the second spring element is moved upwards again when inhaled through the molded body without noticeable resistance. Thereafter, the spring forces acting on the molded body of the first and second spring elements can be easily overcome by inhalation.
Der vorgeschlagene Umschaltmechanismus gewährleistet bei Betriebspausen ein sicheres Sperren der Luftzufuhr, da der in Sperrstellung befindliche Absperrhebel auch durch auf den Lungenautomaten wirkende Schläge nicht freigege- ben werden kann. Das ungewollte Abströmen von Luft ist dadurch ausgeschlossen. Trotz der sicheren Verriegelung kann der Sperrhebel aber durch bloßes Anatmen sofort wieder in die Betriebsstellung gebracht werden, da das zweite Federelement durch den Formkörper leicht verschoben werden kann und dann zur endgültigen Freigabe des Ab- sperrhebels nur noch geringe Federkräfte zu überwinden sind. In der Betriebsstellung ist der Absperrhebel durch das erste Federelement ebenfalls sicher fixiert.The proposed switching mechanism ensures that the air supply is reliably blocked during breaks in operation, since the blocking lever in the blocking position cannot be released even by blows acting on the regulators. This prevents the unwanted outflow of air. In spite of the secure locking, the locking lever can be immediately brought back into the operating position by breathing in, since the second spring element can be easily moved by the molded body and then only minimal spring forces have to be overcome to finally release the locking lever are. In the operating position, the shut-off lever is also securely fixed by the first spring element.
In Ausgestaltung der Erfindung ist das erste Federelement eine in Längsrichtung belastete Blattfeder, die an ihren schmalen Stirnseiten in einer Nut des Hebelbefestigungs- formkörpers sowie in einer Nut an einem feststehenden Teil des Lungenautomaten reibungsarm abgestützt ist.In an embodiment of the invention, the first spring element is a leaf spring loaded in the longitudinal direction, which is supported with low friction on its narrow end faces in a groove of the lever fastening molded body and in a groove on a fixed part of the regulator.
In weiterer Ausgestaltung der Erfindung umfasst das zweite Federelement (Sicherheitshalterung) eine beweglich geführte Gleitschiene, die an der Seite des Hebelbefesti- gungsformkörpers ein Rastfederelement aufweist. Das Rastfederelement besteht aus einem etwa halbkreisförmigen Aufnahmeteil zur Überdeckung des Hebelbefestigungsform- körpers und einer Schräge zum Anheben des zweiten Federelements beim Umschalten in die Sperrposition. Am anderen Ende der Gleitschiene ist ein Anschlagwinkel vorgesehen, um die Längsbewegung des zweiten Federelements (Sicherheitshalterung) in beiden Richtungen zu begrenzen.In a further embodiment of the invention, the second spring element (safety bracket) comprises a movably guided slide rail which has a detent spring element on the side of the shaped lever fastening body. The detent spring element consists of an approximately semicircular receiving part for covering the lever fastening molded body and a bevel for lifting the second spring element when switching into the locking position. At the other end of the slide rail, a stop bracket is provided to limit the longitudinal movement of the second spring element (safety bracket) in both directions.
In weiterer Ausgestaltung der Erfindung weist der Hebelbefestigungsformkörper im Verriegelungsbereich mit dem Rastfederelement eine gerundete Gleitfläche auf, um durch seine Drehbewegung entlang der Schräge bzw. in dem Aufnahmeteil das zweite Federelement leicht bewegen zu kön- nen .In a further embodiment of the invention, the shaped lever attachment body has a rounded sliding surface in the locking area with the detent spring element in order to be able to move the second spring element easily by its rotational movement along the slope or in the receiving part.
Aus den Ansprüchen ergeben sich weitere Merkmale und vorteilhafte Weiterbildungen der Erfindung. Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung näher erläutert. Die Figuren 1 bis 5 geben in einer schematischen Darstellung die verschiedenen Schaltpositionen eines Umschaltmechanismus für einen Überdruck- Lungenautomaten wieder.Further features and advantageous developments of the invention result from the claims. An embodiment of the invention is explained in more detail with reference to the drawing. Figures 1 to 5 show in a schematic representation the different switching positions of a switching mechanism for a positive pressure regulator.
Fig. 1 zeigt den Umschaltmechanismus in der manuell gesperrten, aber entlasteten Position;Fig. 1 shows the switching mechanism in the manually locked but unloaded position;
Fig. 2 zeigt den Umschaltmechanismus nach Fig. 1 in einer nach einer Erschütterung durch Schlageinwirkung weiterhin für die Luftzufuhr gesperrten Position;FIG. 2 shows the switching mechanism according to FIG. 1 in a position which is still blocked for air supply after a shock due to impact.
Fig. 3 zeigt den Umschaltmechanismus nach dem Anatmen und während des Betriebes;Fig. 3 shows the switching mechanism after breathing in and during operation;
Fig. 4 zeigt den Umschaltmechanismus beim Abschalten durch manuelle Betätigung;Fig. 4 shows the switching mechanism when switching off by manual operation;
Fig. 5 zeigt den Umschaltmechanismus beim Umschalten von der Sperrposition in die A- temposition.5 shows the switching mechanism when switching from the blocking position to the breathing position.
Gemäß den Figuren 1 bis 5 umfaßt der Umschaltmechanismus einen schwenkbar gelagerten Absperrhebel 1, der in der oberen, beispielsweise in Fig. 1 dargestellten Position einen Anschlag für eine unter ständiger Wirkung eine Ü- berdruckfeder (nicht dargestellt) stehende, mit einer durch die Atmung betätigten Membran (nicht dargestellt) verbundenen Membranplatte 2 bildet. Diese Membranplatte 2 ist über ein Hebelsystem (nicht dargestellt) mit einem Schließmechanismus für ein Ventil 3 verbunden, über das die Luftzufuhr aus einem Druckluftreservoir mit Druckminderer (nicht dargestellt) freigegeben oder gesperrt wird. Während der Benutzung eines Pressluft-Atemgerätes befindet sich der Absperrhebel 1 ständig in der in Fig. 3 dargestellten unteren Position und ist unter der Wirkung ei- ner Blattfeder 4 an einem von dem Ventil 3 gebildeten Anschlag federnd gehalten. Somit kann sich die Membranplatte 2 unter der Wirkung des bei jedem Atemzug erzeugten Unterdruckes nach unten (in Richtung des am Ventilanschlag gehaltenen Absperrhebels 1) bewegen. Nach jedem Atemzug wird die mit der Membran verbundene Membranplatte 2 wieder nach oben gedrückt und das Ventil 3 geschlossen, so dass der gewünschte Überdruck in dem Lungenautomat durch die von oben auf die Membranplatte 2 wirkende Überdruckfeder aufrechterhalten wird.According to FIGS. 1 to 5, the switching mechanism comprises a pivotably mounted shut-off lever 1 which, in the upper position, for example shown in FIG. 1, has a stop for an overpressure spring (not shown) which is under constant action, with a formed by the breathing membrane (not shown) connected membrane plate 2. This membrane plate 2 is connected via a lever system (not shown) to a closing mechanism for a valve 3, via which the air supply from a compressed air reservoir with a pressure reducer (not shown) is released or blocked. When using a compressed air breathing apparatus, the shut-off lever 1 is constantly in the lower position shown in FIG. 3 and is resiliently held under the action of a leaf spring 4 at a stop formed by the valve 3. Thus, the membrane plate 2 can move downward (in the direction of the shut-off lever 1 held at the valve stop) under the effect of the negative pressure generated with each breath. After each breath, the membrane plate 2 connected to the membrane is pushed up again and the valve 3 is closed, so that the desired overpressure in the regulator is maintained by the overpressure spring acting on the membrane plate 2 from above.
Der Absperrhebel 1 ist mit einem Hebelbefestigungsformkörper 5 verbunden, der in einem Drehgelenk 6 schwenkbar gelagert ist. Der Formkörper 5 dient im Zusammenwirken mit der Sperrfeder 4 dazu, den Absperrhebel 1 entweder in der unteren Position, d.h. in der Betriebsposition, zu halten oder in der oberen Position, in der die Luftzufuhr vollständig gesperrt ist, zu fixieren. Die Blattfeder 4 weist eine mittige Ausbauchung 4a auf und ist unter Fe- derspannung an ihren beiden stirnseitigen Kanten in einer keilförmigen Nut 7 des Hebelbefestigungsformkörpers 5 bzw. in einer keilförmigen Nut 8 eines Führungselernents 9 gehalten und gelagert. Diese Ausbildung und Anordnung der Sperrfeder 4 gewährleistet eine reibungsarme Bewegung des Absperrhebels 1, so dass bei der Inbetriebsetzung des Lungenautomaten aus der Sperrstellung nur unerhebliche Gegenkräfte zu überwinden sind und der Absperrhebel 1 durch bloßes Anatmen in die unter Position, d.h. die Betriebsstellung, bewegt wird. Die Außerbetriebsetzung des Lungenautomaten, d.h. die Unterbrechung jeglicher Luftzu- fuhr, wird mit Hilfe einer am Gehäuse des Lungenautomaten angebrachten Drucktaste, die in Fig. 4 mit dem Pfeil F angedeutet ist, erreicht. Bei Betätigung der Drucktaste wird der Formkörper 5 in die in Fig. 1 dargestellte, im wesentlichen senkrechte Lage gebracht und in dieser Posi- tion zum einen durch die Blattfeder 4 und zusätzlich durch die Sicherheitshalterung 10 gehalten.The shut-off lever 1 is connected to a shaped lever attachment body 5 which is pivotably mounted in a swivel joint 6. The shaped body 5, in cooperation with the locking spring 4, serves to hold the shut-off lever 1 either in the lower position, ie in the operating position, or to fix it in the upper position, in which the air supply is completely blocked. The leaf spring 4 has a central bulge 4a and is held and supported under spring tension on its two front edges in a wedge-shaped groove 7 of the lever fastening molded body 5 or in a wedge-shaped groove 8 of a guide element 9. This design and arrangement of the locking spring 4 ensures a low-friction movement of the shut-off lever 1, so that when the regulator is put into operation from the locked position only insignificant Opposing forces are to be overcome and the shut-off lever 1 is moved into the under position, ie the operating position, by just breathing on. The shutdown of the regulator, ie the interruption of any air supply, is achieved with the aid of a push button attached to the regulator housing, which is indicated by the arrow F in FIG. 4. When the pushbutton is actuated, the molded body 5 is brought into the substantially vertical position shown in FIG. 1 and held in this position on the one hand by the leaf spring 4 and additionally by the safety holder 10.
Damit sich der Absperrhebel 1 aber nicht durch Erschütte- rungen selbsttätig in die untere Position, d.h. die Betriebsposition, bewegt, in der unter der Wirkung des auf die Membranplatte 2 wirkenden Federdruckes ständig Luft entweichen kann, ist zusätzlich zur Blattfeder 4 eine Sicherheitshalterung 10 vorgesehen. Diese Sicherheitshalte- rung 10 umfaßt eine Gleitschiene 11, einen am unteren Ende der Gleitschiene 11 vorgesehenen Anschlagwinkel 12 und eine am oberen Ende der Gleitschiene 11 abgewinkeltes Rastfederelement 13. Die Gleitschiene 11 ist im Abstand vom Drehgelenk 6 des Hebelbefestigungsformkörpers 5 in dem Führungselement 9 geführt und entsprechend dem Abstandsmaß zwischen dem Führungselement 9 und einen von dem Gehäuse des Lungenautomaten gebildeten Anschlag 14 gemäß dem Pfeil A beweglich. Das Rastfederelement 13 ist durch ein sich an die Gleitschiene 11 anschließendes, et- wa halbkreisförmig gewölbtes Aufnahmeteil 13a und eine von dessen Ende schräg nach oben abstehende Schräge 13b gebildet .So that the shut-off lever 1 does not move automatically into the lower position due to vibrations, i.e. the operating position, moves, in which air can constantly escape under the action of the spring pressure acting on the membrane plate 2, a safety bracket 10 is provided in addition to the leaf spring 4. This safety bracket 10 comprises a slide rail 11, a stop bracket 12 provided at the lower end of the slide rail 11 and a latching spring element 13 angled at the upper end of the slide rail 11. The slide rail 11 is guided in the guide element 9 at a distance from the swivel joint 6 of the lever fastening molded body 5 and Movable according to the arrow A in accordance with the distance between the guide element 9 and a stop 14 formed by the housing of the regulator. The detent spring element 13 is formed by a receptacle part 13a adjoining the slide rail 11, which is curved in a semi-circular manner, and a bevel 13b projecting obliquely upward from its end.
Bei Betätigung der Drucktaste (Pfeil F) zur Außerbetriebsetzung des Lungenautomaten gleitet das abgerundete Ende des Hebelbefestigungsformkörpers 5 zunächst entlang der Schräge 13a, so dass die Sicherheitshebelha1terung 10 in die obere Lage gelangt, in der der Anschlagwinkel 12 am Führungselement 9 anschlägt . Danach rutscht das abgerundete Formkörperende unter Überwindung der Federkraft des Rastfederelements 13 in das Aufnahmeteil 13a.When the push button (arrow F) is pressed to shut down the regulator, the rounded end slides of the lever fastening molded body 5 first along the slope 13a, so that the safety lever bracket 10 reaches the upper position in which the stop bracket 12 strikes the guide element 9. The rounded shaped body end then slides into the receiving part 13a while overcoming the spring force of the detent spring element 13.
Damit ist der Absperrhebel 1 in der Sperrposition sowohl durch die Blattfeder 4 als auch durch die Sicherheitshalterung 10 fixiert. Der Absperrhebel 1 kann sich aber auch infolge einer durch Schlageinwirkung erzeugten Erschütterung nicht selbsttätig verstellen, da in diesem Fall die Sicherheitshalterung 10 aufgrund ihres Eigengewichts bis zum Anschlag nach unten gleitet und der Hebelbefestigungsformkörper 5 noch sicherer in dem Aufnahmeteil 13a verriegelt ist. Trotz dieser sicheren Verriegelung des mit dem Absperrhebel 1 verbundenen Hebelbefestigungsform- körpers 5 kann der Lungenautomat durch bloßes Anatmen wieder in Betrieb gebracht werden, da durch den auf die Membranplatte 2 wirkenden Druck die Sicherheitshalterung 10 leicht bis zum Anschlag des Anschlagwinkels 12 an das Führungselement 9 nach oben verschoben und anschließend die Federkraft des Rastfederelements 13 sowie der Blatt- feder 4 überwunden wird.The shut-off lever 1 is thus fixed in the locked position both by the leaf spring 4 and by the safety bracket 10. The shut-off lever 1, however, cannot also adjust itself automatically as a result of a shock caused by impact, since in this case the safety holder 10 slides down to the stop due to its own weight and the lever fastening molded body 5 is locked even more securely in the receiving part 13a. Despite this secure locking of the lever fastening molded body 5 connected to the shut-off lever 1, the regulator can be put back into operation simply by breathing in, since, due to the pressure acting on the diaphragm plate 2, the safety bracket 10 can be easily pushed against the guide element 9 until the stop bracket 12 stops shifted above and then the spring force of the detent spring element 13 and the leaf spring 4 is overcome.
Mit dem zuvor beschriebenen Umschaltmechanismus ist einerseits das sichere Absperren der Luftzufuhr gewährleis- tet, so dass keine Luft aus dem Pressluftreservoir verlorengehen kann. Dennoch ist aber eine sofortige Wiederinbetriebnahme des mit dem Atemschutzgerät verbundenen Lungenautomaten möglich, da mit dem vorgeschlagenen Umschaltmechanismus die zum Halten des Absperrhebels wirk- samen Kräfte durch bloßes Anatmen überwunden werden kön- nen. In der Betriebsstellung ist der Absperrhebel 1 ebenfalls sicher in einer unteren Anschlagposition gehalten.With the switching mechanism described above, the safe shut-off of the air supply is ensured on the one hand, so that no air can be lost from the compressed air reservoir. Nevertheless, an immediate restart of the regulator connected to the breathing apparatus is possible, since with the proposed switching mechanism the forces acting to hold the shut-off lever can be overcome by just breathing on. NEN. In the operating position, the shut-off lever 1 is also held securely in a lower stop position.
Die Funktion des Umschaltmechanismus wird noch einmal anhand der in den Fig. 1 bis 5 wiedergegebenen Positionen erläutert .The function of the switching mechanism is explained once again with reference to the positions shown in FIGS. 1 to 5.
Gemäß Fig. 1 wurde der Absperrhebel 1 gemäß dem Pfeil B nach oben - in die Sperrstellung - bewegt und wirkt (Pfeil C) auf die Membranplatte 2. Damit ist die Luftzufuhr gesperrt. Die Sicherheitshalterung 10 befindet sich in der durch den Anschlagwinkel 12 begrenzten oberen Po- sition.According to FIG. 1, the shut-off lever 1 has been moved upward into the blocking position according to arrow B and acts (arrow C) on the membrane plate 2. The air supply is thus blocked. The safety bracket 10 is in the upper position delimited by the stop bracket 12.
Bei einer Schlageinwirkung auf den Lungenautomaten, bei der sich - gemäß Fig. 2 - die Membranplatte 2 und der Ab- sperrhebel 1 in Richtung der Pfeile C und B bewegen, wird diese unerwünschte, mit einem Luftverlust verbundenen Bewegung des Absperrhebels 1 und der Membranplatte 2 verhindert, indem die Sicherheitshalterung 10 nach unten fällt und somit der Hebelbefestigungsformkörper 5 voll- ständig in dem Aufnahmeteil 13a gehalten ist.In the event of an impact on the regulator, in which - according to FIG. 2 - the diaphragm plate 2 and the shut-off lever 1 move in the direction of the arrows C and B, this undesired movement of the shut-off lever 1 and the diaphragm plate 2, which is associated with a loss of air, becomes prevented by the safety holder 10 falling down and thus the lever fastening molded body 5 being held completely in the receiving part 13a.
Fig. 3 zeigt den Umschaltmechanismus in der Betriebsposition, in der der Absperrhebel 1 mit Hilfe der Blattfeder 4 fest an einen Anschlag (nicht dargestellt) gehalten ist und sich die durch das Einatmen betätigte Membranplatte 2 zum Öffnen und Schließen des Ventils 3 für die Luftzufuhr zum Benutzer frei aufwärts und abwärts bewegen kann. Fig. 4 gibt schließlich die Außerbetriebsetzung des Lungenautomaten wieder. Dabei wird der Absperrhebel (1) mittels der Drucktaste (Pfeil F) in Richtung des Pfeils B bewegt und die Sicherheitshalterung 10 durch die Bewegung des Hebelbefestigungsformkörpers 5 entlang der SchrägeFig. 3 shows the switching mechanism in the operating position, in which the shut-off lever 1 is held firmly by means of the leaf spring 4 against a stop (not shown) and the membrane plate 2 actuated by inhalation for opening and closing the valve 3 for the air supply to Users can freely move up and down. Fig. 4 finally shows the shutdown of the regulator. The shut-off lever (1) is moved in the direction of arrow B by means of the pushbutton (arrow F) and the safety holder 10 is moved along the slope by the movement of the lever fastening molded body 5
13b in Richtung des Pfeils A nach oben verschoben bis der Anschlagwinkel 12 an das Führungselement 9 anschlägt . Bei weiterer Einwirkung auf die Drucktaste (Pfeil F) gelangt der Hebelbefestigungsformkörper 5 in die in Fig. 1 darge- stellte Position, und zwar unter Überwindung der Federkraft des Rastfederelerne ts 13. Die biegesteife Gleitschiene 11 ist auch im oberen Bereich seitlich abgestützt (nicht dargestellt) und kann bei einer Kraftwirkung auf das Rastfederelement nicht seitlich ausweichen.13b moved upwards in the direction of arrow A until the stop bracket 12 strikes the guide element 9. When the pushbutton (arrow F) is acted on further, the shaped lever fastening body 5 moves into the position shown in FIG. 1, namely by overcoming the spring force of the detent spring element 13. The rigid slide rail 11 is also laterally supported in the upper region (not shown) ) and cannot deflect laterally when a force is applied to the detent spring element.
Fig. 5 zeigt die Inbetriebsetzung des Lungenautomaten, bei der durch das Anatmen des Benutzers und den dadurch bewirkten Druck der Membranplatte 2 gemäß Pfeil C auf den sich in Richtung des Pfeils B bewegenden Absperrhebel 1 die Sicherheitshalterung 10 bis zum Anschlag am Führungselement 5 angehoben und anschließend die Federkraft des Rastfederelements 13 und der Blattfeder 4 leicht überwunden werden kann . Fig. 5 shows the start-up of the regulator, in which the safety bracket 10 is raised to the stop on the guide element 5 and then by the breathing in of the user and the resulting pressure of the membrane plate 2 according to arrow C on the locking lever 1 moving in the direction of arrow B. the spring force of the detent spring element 13 and the leaf spring 4 can be easily overcome.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
I Absperrhebel 2 MembranplatteI shut-off lever 2 membrane plate
3 Ventil3 valve
4 Blattfeder (erstes Federelement) 4a Ausbauchung von 44 leaf spring (first spring element) 4a bulge of 4
5 Hebelbefestigungsformkörper 5a gerundete Gleitfläche5 shaped lever attachment body 5a rounded sliding surface
6 Drehgelenk von 56 swivel of 5
7 keilförmige Nut von 57 wedge-shaped groove of 5
8 keilförmige Nut von 98 wedge-shaped groove of 9
9 Führungselement 10 Sicherheitshalterung (zweites Federelement)9 guide element 10 safety bracket (second spring element)
II GleitschieneII slide rail
12 Anschlagwinkel12 stop angles
13 Rastfederelement 13a Aufnähmeteil 13b Schräge13 detent spring element 13a receiving part 13b bevel
14 Anschlag 1414 stop 14
Pfeil F Drucktaste Pfeil A Bewegung der Sicherheitshalterung Pfeil B Bewegung des Absperrhebel / Hebelbefestigungsformkörpers Pfeil C Bewegung der Membranplatte Arrow F push button arrow A movement of the safety bracket arrow B movement of the shut-off lever / lever attachment molded body arrow C movement of the membrane plate

Claims

Patentansprüche claims
1. Lungenautomat für Pressluftatemgeräte, mit einer zur Erzielung eines Überdrucks durch eine Druckfeder belasteten und durch die Atmung betätigbaren Membran zur Steuerung eines Ventils für die Luftzufuhr sowie einen Absperrhebel zum Arretieren der Membran in einer Betriebspause, dadurch gekennzeichnet, dass der Absperrhebel (1) mit einem schwenkbar gelagerten Hebelbefestigungsformkörper (5) verbunden ist, der durch eine reibungsarm gelagerte erste Federhalterung sowohl in der Freigabeposition als auch in der Sperrposition der Membran gehalten ist und dem als Sicherheitshalterung (10) ein zweites, in Längsrichtung begrenzt bewegliches Federelement zugeordnet ist, hinter dem der Hebelbefestigungsformkörper (5) in der Sperrstellung zusätzlich federnd verrastbar ist und die sich bei Schlageinwirkung entsprechend ihrem Eigengewicht selbsttätig verschiebt und dadurch den Hebel- befestigungsformkörper (5) weiter umschließt.1.A regulator for compressed air breathing apparatus, with a membrane loaded to achieve an overpressure by a compression spring and which can be actuated by breathing to control a valve for the air supply, as well as a shut-off lever for locking the membrane during a break in operation, characterized in that the shut-off lever (1) also a pivotally mounted shaped lever attachment body (5) is connected, which is held by a low-friction first spring holder both in the release position and in the blocking position of the membrane and which is assigned as a safety holder (10), a second, longitudinally movable spring element behind which the shaped lever attachment body (5) can also be resiliently locked in the locked position and which moves automatically when impacted according to its own weight and thereby further encloses the shaped lever attachment body (5).
2. Lungenautomat nach Anspruch 1, dadurch gekennzeichnet, dass zum Erzeugen der auf den Hebelbefestigungsfor - körper (5) wirkenden ersten Federkraft eine in Längsrichtung belastete Blattfeder (4) vorgesehen ist.2. A lung regulator according to claim 1, characterized in that a leaf spring (4) loaded in the longitudinal direction is provided for generating the first spring force acting on the lever fastening body (5).
3. Lungenautomat nach Anspruch 2, dadurch gekennzeich- net, dass die Blattfeder (4) an ihren schmalen Stirnseiten in Nuten (7) und (8), die sich in dem Hebelbefestigungsformkörper (5) bzw. einem feststehenden Teil (9) des Ventilkörpers befinden, beweglich abgestützt ist. 3. regulator according to claim 2, characterized in that the leaf spring (4) on its narrow end faces in grooves (7) and (8), which are in the lever mounting molded body (5) or a fixed part (9) of the valve body are movably supported.
4. Lungenautomat nach Anspruch 3, dadurch gekennzeichnet, dass die Nuten (7, 8) schräg versetzt zueinander angeordnet sind.4. regulator according to claim 3, characterized in that the grooves (7, 8) are arranged obliquely offset from one another.
5. Lungenautomat nach Anspruch 3 und 4, dadurch gekennzeichnet, dass die Nuten (7, 8) keilförmig aufgebildet sind.5. regulator according to claim 3 and 4, characterized in that the grooves (7, 8) are wedge-shaped.
6. Lungenautomat nach einem der Anspüche 1 bis 5, dadurch gekennzeichet, dass der Hebelbefestigungsformkörper (5) auf der der Nut (7) gegenüberliegenden Seite eine gerundete Gleitfläche (5a) aufweist.6. regulator according to one of claims 1 to 5, characterized in that the lever attachment molded body (5) on the side opposite the groove (7) has a rounded sliding surface (5a).
7. Lungenautomat nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Hebelbefestigungsformkörper (5) in einem Drehgelenk (6) gelagert ist und an der dem Absperrhebel (1) abgewandten, unterhalb des Drehgelenks (6) liegenden Seite eine Drucktaste (Pfeil F) zum manuellen Verschwenken des Absperrhebels (1) in seine Sperrstellung aufweist.7. regulator according to one of claims 1 to 6, characterized in that the lever fastening molded body (5) is mounted in a swivel joint (6) and on the side facing away from the shut-off lever (1), below the swivel joint (6), a pushbutton (arrow F) for manually pivoting the shut-off lever (1) into its locked position.
8. Lungenautomat nach Anspruch 1, dadurch gekennzeichnet, dass die Sicheheitshalterung (10) eine in einem Führungselement (9) geführte Gleitschiene (11) ist, die an dem Ende, an dem sich der Hebelbefestigungsformkörper (5) befindet, in ein Rastfederelement (13), bestehend aus einem etwa halbkreisförmigen Aufnahmeteil (13a) und einer daran anschließenden Schräge (13b) , übergeht und die am gegenüberliegenden Ende einen Anschlagwinkel (12) zur beidseitigen Begrenzung der Längsbewegung der Sicher- heitshalterung (10) aufweist. 8. lung regulator according to claim 1, characterized in that the safety holder (10) is a in a guide element (9) guided slide rail (11), which is at the end at which the lever fastening molded body (5) is in a detent spring element (13 ), consisting of an approximately semicircular receiving part (13a) and an adjoining bevel (13b), which has a stop bracket (12) at both ends to limit the longitudinal movement of the safety bracket (10) on both sides.
9. Lungenautomat nach Anspruch 8, dadurch gekennzeichnet, dass die Sicherheitshalterung (10) aus einem Federstahlband geformt ist, das im Bereich der geführten Gleitschiene (11) durch eine Sicke versteift ist.9. regulator according to claim 8, characterized in that the safety bracket (10) is formed from a spring steel strip which is stiffened in the region of the guided slide rail (11) by a bead.
10. Lungenautomat nach Anspruch 8 und 9, dadurch gekennzeichnet, dass die Sicherheitshalterung (10) im Bereich der Gleitschiene (11) auf der dem Hebelbefestigungsformkörper (5) gegenüberliegenden Seite am Gehäuse des Lungenautomaten abgestützt ist.10. regulator according to claim 8 and 9, characterized in that the safety bracket (10) is supported in the region of the slide rail (11) on the side opposite the lever fastening molded body (5) on the housing of the regulator.
11. Lungenautomat nach Anspruch 8 bis 10, dadurch gekennzeichnet, dass der Hebelbefestigungsformkörper (5) in der Sperrstellung des Absperrhebels (1) zunächst teilweise und bei Erschütterung des Lungenautomaten durch schwerkraftbedingtes Absenken der Sicherheitshalterung (10) weiter in dem Aufnahmeteil (13a) des Rastfederelements (13) aufgenommen ist.11. regulator according to claim 8 to 10, characterized in that the lever fastening molded body (5) in the locked position of the shut-off lever (1) initially partially and upon vibration of the regulator by gravity-related lowering of the safety bracket (10) further in the receiving part (13a) of the detent spring element (13) is included.
12. Lungenautomat nach einem der Ansprüche 1 bis 11, da- durch gekennzeichnet, dass der Absperrhebel (1) in einem vom Hebelbefestigungskörper (5) entfernten Bereich abgewinkelt oder gekrümmt ausgebildet ist. 12. A regulator according to one of claims 1 to 11, characterized in that the shut-off lever (1) is angled or curved in a region remote from the lever fastening body (5).
EP02719678A 2001-05-14 2002-03-12 Automatic-lung regulator for compressed-air respiration apparatus Expired - Lifetime EP1387708B9 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2001125076 DE10125076C1 (en) 2001-05-14 2001-05-14 Automatic lung, for pressurized air respiration device, has blocking lever for securing membrane in operating pause provided with safety restraint preventing release by mechanical shock
DE10125076 2001-05-14
PCT/DE2002/000920 WO2002092155A1 (en) 2001-05-14 2002-03-12 Automatic-lung regulator for compressed-air respiration apparatus

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EP1387708A1 true EP1387708A1 (en) 2004-02-11
EP1387708B1 EP1387708B1 (en) 2007-01-17
EP1387708B9 EP1387708B9 (en) 2007-10-24

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AU (1) AU2002250818B2 (en)
DE (2) DE10125076C1 (en)
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DE202010018211U1 (en) 2009-04-22 2014-09-29 Nevro Corporation Selective high-frequency spinal modulation for pain relief with less side-effect, and associated systems
DE102019108790B4 (en) * 2019-04-03 2020-11-19 BartelsRieger Atemschutztechnik GmbH Demand regulator, in particular for a breathing apparatus
CN114602142B (en) * 2022-02-25 2023-10-27 江苏康康同学科技有限公司 Be used for patient's pulmonary function rehabilitation training device

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US4284075A (en) * 1978-06-17 1981-08-18 Alan Krasberg Diving headgear for use in return-line diving systems
FR2535612B1 (en) * 1982-11-05 1986-04-11 Lejeune Seitz Ameline Labo IMPROVED BREATHING VALVE
IT1161849B (en) * 1983-05-19 1987-03-18 Sekur Spa SWITCHING DEVICE FOR AN AIR DISPENSER INTENDED TO FEED BREATHABLE AIR WITHIN A BREATHING AIR
IT216049Z2 (en) * 1988-12-29 1991-04-26 Amf Mares Spa AUTOMATIC DISPENSER FOR SELF-BREAKING RATORS

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DE10125076C1 (en) 2002-05-23
DE50209289D1 (en) 2007-03-08
EP1387708B1 (en) 2007-01-17
WO2002092155A1 (en) 2002-11-21
ES2278910T3 (en) 2007-08-16
AU2002250818B2 (en) 2005-06-09

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