EP0182979A2 - Breathing protection device with air regeneration - Google Patents

Breathing protection device with air regeneration Download PDF

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Publication number
EP0182979A2
EP0182979A2 EP85110550A EP85110550A EP0182979A2 EP 0182979 A2 EP0182979 A2 EP 0182979A2 EP 85110550 A EP85110550 A EP 85110550A EP 85110550 A EP85110550 A EP 85110550A EP 0182979 A2 EP0182979 A2 EP 0182979A2
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EP
European Patent Office
Prior art keywords
breathing
chemical cartridge
connection
protection device
surface cooler
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
EP85110550A
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German (de)
French (fr)
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EP0182979A3 (en
EP0182979B1 (en
Inventor
Ernst-Günther Kolbe
Hasso Weinmann
Wolfgang Dipl.-Ing. Drews
Wolfgang Eckstein
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Draegerwerk AG and Co KGaA
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Draegerwerk AG and Co KGaA
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Application filed by Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of EP0182979A2 publication Critical patent/EP0182979A2/en
Publication of EP0182979A3 publication Critical patent/EP0182979A3/en
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Publication of EP0182979B1 publication Critical patent/EP0182979B1/en
Expired legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B21/00—Devices for producing oxygen from chemical substances for respiratory apparatus
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus

Definitions

  • the invention relates to a breathing apparatus with regeneration of the breathing air via a C0 2 binding and 0 2 releasing chemical cartridge, which is arranged in the airway between a breathing connection and a breathing bag.
  • Such a breathing apparatus has become known from DE-OS 25 04 881.
  • the chemical cartridge is arranged between a breathing connection and a breathing bag, so that the exhaled air flows into the breathing bag when the chemical cartridge flows horizontally.
  • the air from the breathing bag is returned to the breathing connection via a non-return valve, bypassing the chemical cartridge.
  • a breathing apparatus is used in what is known as circulatory operation.
  • an exothermic reaction takes place, through which CO 2 is bound and 0 2 is released.
  • the heated exhaled air thus regenerated is cooled to such temperatures during its stay in the breathing bag that the wearer can breathe it in again.
  • a disadvantage of the devices in circulatory operation is the fact that they need their own channels or chambers to return the inhaled air, separate from the air flow of the exhaled air. To avoid this, it is known to operate breathing apparatus of the type mentioned in the pendulum system. Both inhaled and exhaled air flow through the chemical cartridge. However, heat exchangers between the chemical cartridge and the breathing connection must then be provided for cooling the inhaled air. Such heat exchangers are known for example from DE-PS 335 931 and from DE-GM 19 18 991.
  • the object of the present invention is seen in improving a breathing apparatus of the type mentioned in such a way that a heat exchanger required for the pendulum operation does not affect its compact design.
  • the solution to the problem is that a surface cooler is provided in the breathing air flow, which is arranged adjacent and at a spatial distance from the surface area of the chemical cartridge.
  • a respirator according to the invention also has a compact design for use in pendulum operation, which enables the wearer to wear the respirator both in the packaged state without bulky protrusion on the body, and in a simple manner directly before use to wear the mouth of the wearer without compromising it with excessive weight or cantilevered design freedom of movement more than it is g eilleren with recirculation also the case in the known respirator.
  • the surface cooler can be designed in such a way that it is arranged in the form of flat and wide piping around the jacket of the chemical cartridge, with a certain distance from the jacket must be kept in order to prevent the surface cooler from heating up and to ensure that it is completely flushed with ambient air.
  • the respiratory protection q is only slightly enlarged on the circumference of the chemical cartridge.
  • the surface cooler can be arranged as a bypass connection between the breathing bag and the breathing connection and can contain a check valve.
  • a chin rest is attached below the breathing connection.
  • the head harness is attached to the surface of the chemical cartridge, also in order to achieve a compact design of the breathing apparatus.
  • the breathing apparatus in the shuttle mode consists of a chemical cartridge 1, on one end face 2 of which the surface cooler 14 is attached to the breathing connection 13, and on the other end face 4 of which the breathing bag 7 is attached. is.
  • the breathing apparatus is attached with the head strap 6.
  • a pressure relief valve 9 is provided on the breathing bag 7.
  • a starter 15 is connected to the chemical cartridge 1, which supplies the oxygen required in the first minutes as long as the chemical filling 3 has not yet reacted.
  • the device wearer exhales through the breathing connection 13 into the lines of the surface cooler 14 arranged in a ring at a distance from the lateral surface 5 of the chemical cartridge 1, its exhaled air reaching the prechamber 11 and from there through the chemical filling 3 into the breathing bag 7.
  • the chemical filling 3 removes C0 2 from the exhaled air by an exothermic reaction and releases 0 2 to it.
  • the breathing air enriched with 0 2 from the breathing bag 7 is again passed through the chemical cartridge 1 into the prechamber 11.
  • the inhaled air absorbs part of the heat of reaction. However, this is released into the environment again during the flow through the surface cooler 14.
  • the flat cable cross-section also proves to be advantageous, since it ensures that the dead space volume for breathing is as small as possible.
  • a chin rest 12 attached to the prechamber 11 serves to facilitate the mounting of the breathing apparatus.
  • a bypass line 16 is provided on the prechamber 11 as a surface cooler as a connection to the breathing bag 7.
  • a check valve 17 is provided in the bypass line 16. Since the breathing bag 7 in circulation for the essential Cooling of the inhaled air ensures, the surface cooler 16 can consist of a simple pipe.

Abstract

Ein Atemschutzgerät mit einer die Atemluft regenerierenden Chemikalpatrone besitzt zur Abkühlung der Einatemluft einen im Atemluftstrom befindlichen Flächenkühler (14, 16), welcher benachbart und in räumlichem Abstand zur Mantelfläche (5) der Chemikalpatrone (1) angeordnet ist.A respirator with a chemical cartridge that regenerates the breathing air has a surface cooler (14, 16) in the breathing air stream to cool the inhaled air, which is arranged adjacent to and at a spatial distance from the lateral surface (5) of the chemical cartridge (1).

Description

Die Erfindung betrifft ein Atemschutzgerät mit Regeneration der Atemluft über eine C02 bindende und 02 abgebende Chemikalpatrone, welche im Atemweg zwischen einem Atemanschluß und einem Atembeutel angeordnet ist.The invention relates to a breathing apparatus with regeneration of the breathing air via a C0 2 binding and 0 2 releasing chemical cartridge, which is arranged in the airway between a breathing connection and a breathing bag.

Ein derartiges Atemschutzgerät ist aus der DE-OS 25 04 881 bekannt geworden.Such a breathing apparatus has become known from DE-OS 25 04 881.

Bei dem bekannten Atemschutzgerät ist die Chemikalpatrone zwischen einem Atemanschluß und einem Atembeutel angeordnet, so daß die Ausatemluft bei horizontaler Durchströmung der Chemikalpatrone in den Atembeutel strömt. Bei der Einatmung wird die Luft aus dem Atembeutel über ein Rückschlagventil unter Umgehung der Chemikalpatrone in den Atemanschluß zurückgeführt. Ein solches Atemschutzgerät wird im sogenannten Kreislaufbetrieb eingesetzt. Bei Durchströmung der Ausatemluft durch die Chemikalpatrone erfolgt eine exotherme Reaktion, durch welche CO2 gebunden und 02 abgegeben wird. Die so regenerierte angewärmte Ausatemluft wird während ihres Aufenthaltes im Atembeutel auf solche Temperaturen abgekühlt, daß sie der Geräteträger wieder einatmen kann.In the known breathing apparatus, the chemical cartridge is arranged between a breathing connection and a breathing bag, so that the exhaled air flows into the breathing bag when the chemical cartridge flows horizontally. When inhaled, the air from the breathing bag is returned to the breathing connection via a non-return valve, bypassing the chemical cartridge. Such a breathing apparatus is used in what is known as circulatory operation. When the exhaled air flows through the chemical cartridge, an exothermic reaction takes place, through which CO 2 is bound and 0 2 is released. The heated exhaled air thus regenerated is cooled to such temperatures during its stay in the breathing bag that the wearer can breathe it in again.

Nachteilig bei den Geräten im Kreislaufbetrieb ist die Tatsache, daß sie zur Zurückführung der Einatemluft eigene, von der Luftführung der Ausatemluft getrennte Kanäle oder Kammern benötigen. Um dies zu vermeiden, ist es bekannt, Atemschutzgeräte der genannten Art im Pendelsystem zu betreiben. Dabei durchströmen sowohl Einatem- als auch Ausatemluft die Chemikalpatrone. Es müssen jedoch dann zur Kühlung der Einatemluft Wärmetauscher zwischen Chemikalpatrone und Atemanschluß vorgesehen werden. Derartige Wärmetauscher sind beispielsweise aus der DE-PS 335 931 und aus dem DE-GM 19 18 991 bekannt. Würde man jedoch diese bekannten Wärmetauscher, was ohne weiteres möglich ist, an ein Atemschutzgerät der genannten Art anschließen, welches unter Weglassung der für die Atmung im Kreislaufbetrieb notwendigen Rückführungskanäle für die Einatemluft in ein Atemgerät für den Pendelbetrieb modifiziert wurde, würde man den bekannten Vorteil der kompakten und raumsparenden und damit für den Geräteträger leicht zu handhabenden Atemschutzgeräte durch die aufwendigen, schweren und raumbeanspruchenden Wärmetauscher verlieren.A disadvantage of the devices in circulatory operation is the fact that they need their own channels or chambers to return the inhaled air, separate from the air flow of the exhaled air. To avoid this, it is known to operate breathing apparatus of the type mentioned in the pendulum system. Both inhaled and exhaled air flow through the chemical cartridge. However, heat exchangers between the chemical cartridge and the breathing connection must then be provided for cooling the inhaled air. Such heat exchangers are known for example from DE-PS 335 931 and from DE-GM 19 18 991. However, if one were to connect these known heat exchangers, which is readily possible, to a breathing apparatus of the type mentioned, which was modified into a breathing apparatus for the pendulum operation while omitting the recirculation channels for the inhaled air necessary for breathing in circulatory mode, the known advantage of compact and space-saving and therefore easy to use for the wearer of breathing apparatus due to the complex, heavy and space-consuming heat exchangers.

Die Aufgabe der vorliegenden Erfindung wird darin gesehen, ein Atemschutzgerät der genannten Art derart zu verbessern, daß ein für den Pendelbetrieb notwendiger Wärmetauscher seine kompakte Bauform nicht beeinflußt.The object of the present invention is seen in improving a breathing apparatus of the type mentioned in such a way that a heat exchanger required for the pendulum operation does not affect its compact design.

Die Lösung der Aufgabe besteht darin, daß im Atemluftstrom ein Flächenkühler vorgesehen ist, welcher benachbart und in räumlichem Abstand zur Mantelfäche der Chemikalpatrone angeordnet ist.The solution to the problem is that a surface cooler is provided in the breathing air flow, which is arranged adjacent and at a spatial distance from the surface area of the chemical cartridge.

Der Vorteil eines erfindungsgemäßen Atemschutzgerätes liegt darin, daß es auch für die Benutzung im Pendelbetrieb eine kompakte Bauform aufweist, die es dem Geräteträger ermöglicht, das Atemschutzgerät sowohl im verpackten Zustand ohne sperriges Abstehen am Körper zu tragen, als auch bei Benutzung in einfacher Weise direkt vor dem Mund des Trägers zu tragen, ohne ihn durch übermäßiges Gewicht oder ausladende Bauform in seiner Bewegungsfreiheit mehr zu beeinträchtigen, als es auch bei den bekannten Atemschutzgeräten im Kreislaufbetrieb der Fall ist. 'The advantage of a respirator according to the invention is that it also has a compact design for use in pendulum operation, which enables the wearer to wear the respirator both in the packaged state without bulky protrusion on the body, and in a simple manner directly before use to wear the mouth of the wearer without compromising it with excessive weight or cantilevered design freedom of movement more than it is g eräten with recirculation also the case in the known respirator. '

In besonders vorteilhafter Weise kann der Flächenkühler derart ausgebildet sein, daß er in Form flacher und breiter Rohrleitungszüge um den Mantel der Chemikalpatrone angeordnet ist, wobei ein gewisser Abstand von dem Mantel einzuhalten ist, um eine Aufheizung des Flächenkühlers zu verhindern und seine vollständige Umspülung mit Umgebungsluft zu gewährleisten. Durch diese vorteilhafte Anordnung des Flächenkühlers wird das Atemschutzqerät lediglich am Umfang der Chemikalpatrone geringfügig vergrößert.In a particularly advantageous manner, the surface cooler can be designed in such a way that it is arranged in the form of flat and wide piping around the jacket of the chemical cartridge, with a certain distance from the jacket must be kept in order to prevent the surface cooler from heating up and to ensure that it is completely flushed with ambient air. As a result of this advantageous arrangement of the surface cooler, the respiratory protection q is only slightly enlarged on the circumference of the chemical cartridge.

Um das Atemschutzgerät im Kreislaufbetrieb einzusetzen, kann in weiterer Ausgestaltung der Erfindung der Flächenkühler als eine Bypassverbindung zwischen Atembeutel und Atemanschluß angeordnet sein und ein Rückschlagventil enthalten. Dadurch wird die bei den Kreislaufgeräten durch den Atembeutel vorhandene Abkühlung der Einatemluft durch den Flächenkühler noch weiter erhöht.In order to use the breathing apparatus in closed circuit operation, in a further embodiment of the invention the surface cooler can be arranged as a bypass connection between the breathing bag and the breathing connection and can contain a check valve. As a result, the cooling of the inhaled air in the circulators through the breathing bag is increased even further by the surface cooler.

Zum bequemeren Tragen des Atemschutzgerätes ist vorgesehen, daß unterhalb des Atemanschlusses eine Kinnstütze angebracht ist.For more comfortable wearing of the breathing apparatus, it is provided that a chin rest is attached below the breathing connection.

Die Kopfbänderung wird, ebenfalls um eine kompakte Bauform des Atemschutzgerätes zu verwirklichen, an der Mantelfläche der Chemikalpatrone befestigt.The head harness is attached to the surface of the chemical cartridge, also in order to achieve a compact design of the breathing apparatus.

Ein Ausführungsbeispiel der Erfindung wird anhand der schematischen Zeichnung erläutert und im folgenden näher beschrieben.An embodiment of the invention is explained with reference to the schematic drawing and described in more detail below.

Es zeigen

  • Fig. 1 den Schnitt eines Atemschutzgerätes im Pendelbetrieb
  • Fig. 2 eine Ansicht des Atemschutzgerätes nach Fig. 1
  • Fig. 3 einen Teilschnitt durch ein Atemschutzgerät im Kreislaufbetrieb
Show it
  • Fig. 1 shows the section of a breathing apparatus in the shuttle mode
  • FIG. 2 shows a view of the breathing apparatus according to FIG. 1
  • Fig. 3 shows a partial section through a respirator in circulatory operation

Das Atemschutzgerät im Pendelbetrieb besteht aus einer Chemikalpatrone 1, an deren eine Stirnfläche 2 der Flächenkühler 14 mit dem Atemanschluß 13, und an deren andere Stirnfläche 4 der Atembeutel 7 befestigt. ist. Die Befestigung des Atemschutzgerätes erfolgt mit der Kopfbänderung 6. Am Atembeutel 7 ist ein Überdruckventil 9 vorgesehen. Ein Starter 15 steht in Verbindung mit der Chemikalpatrone 1, welcher den in den ersten Minuten benötigten Sauerstoff liefert, solange die Chemikalfüllung 3 noch nicht anreagiert hat.The breathing apparatus in the shuttle mode consists of a chemical cartridge 1, on one end face 2 of which the surface cooler 14 is attached to the breathing connection 13, and on the other end face 4 of which the breathing bag 7 is attached. is. The breathing apparatus is attached with the head strap 6. A pressure relief valve 9 is provided on the breathing bag 7. A starter 15 is connected to the chemical cartridge 1, which supplies the oxygen required in the first minutes as long as the chemical filling 3 has not yet reacted.

Im Betrieb atmet der Geräteträger durch den Atemanschluß 13 in die ringförmig im Abstand zur Mantelfläche 5 der Chemikalpatrone 1 angeordneten Leitungszüge des Flächenkühlers 14 aus, wobei seine Ausatemluft in die Vorkammer 11 und von dort durch die Chemikalfüllung 3 in den Atembeutel 7 gelangt. Durch die Chemikalfüllung 3 wird durch eine exotherme Reaktion der Ausatemluft C02 entzogen und 02 an sie abgegeben. Beim Einatmen wird die mit 02 angereicherte Atemluft aus dem Atembeutel 7 wiederum durch die Chemikalpatrone 1 in die Vorkammer 11 geleitet. Beim Durchgang durch die Chemikalfüllung 3 nimmt die Einatemluft einen Teil der Reaktionswärme auf. Diese wird jedoch während der Durchströmung des Flächenkühlers 14 wieder an die Umgebung abgegeben. Dabei erweist sich der flache Leitungsquerschnitt zusätzlich von Vorteil, da er für ein möglichst geringes Totraumvolumen für die Atmung sorgt. Zur erleichterten Halterung des Atemschutzgerätes dient eine an der Vorkammer 11 angebrachte Kinnstütze 12.In operation, the device wearer exhales through the breathing connection 13 into the lines of the surface cooler 14 arranged in a ring at a distance from the lateral surface 5 of the chemical cartridge 1, its exhaled air reaching the prechamber 11 and from there through the chemical filling 3 into the breathing bag 7. The chemical filling 3 removes C0 2 from the exhaled air by an exothermic reaction and releases 0 2 to it. When inhaled, the breathing air enriched with 0 2 from the breathing bag 7 is again passed through the chemical cartridge 1 into the prechamber 11. When passing through the chemical filling 3, the inhaled air absorbs part of the heat of reaction. However, this is released into the environment again during the flow through the surface cooler 14. The flat cable cross-section also proves to be advantageous, since it ensures that the dead space volume for breathing is as small as possible. A chin rest 12 attached to the prechamber 11 serves to facilitate the mounting of the breathing apparatus.

Bei dem Atemschutzgerät für Kreislaufbetrieb ist an die Vorkammer 11 als Flächenkühler eine Bypassleitung 16 als Verbindung zum Atembeutel 7 vorgesehen. Um zu gewährleisten, daß beim Betrieb lediglich die Ausatemluft durch die Chemikalpatrone 1 geleitet wird und die Einatemluft über die Bypassleitung 16 in die Vorkammer 11 eintritt, ist in der Bypassleitung 16 ein Rückschlagventil 17 vorgesehen. Da im Kreislaufbetrieb der Atembeutel 7 für die wesentliche Abkühlung der Einatemluft sorgt, kann der Flächenkühler 16 aus einer einfachen Rohrleitung bestehen.In the respirator for circulatory operation, a bypass line 16 is provided on the prechamber 11 as a surface cooler as a connection to the breathing bag 7. In order to ensure that only the exhaled air is passed through the chemical cartridge 1 during operation and the inhaled air enters the prechamber 11 via the bypass line 16, a check valve 17 is provided in the bypass line 16. Since the breathing bag 7 in circulation for the essential Cooling of the inhaled air ensures, the surface cooler 16 can consist of a simple pipe.

Claims (5)

1. Atemschutzgerät mit Regeneration der Atemluft über eine C02 bindende und 02 abgebende Chemikalpatrone, welche im Atemweg zwischen einem Atemanschluß und einem Atembeutel angeordnet ist, dadurch gekennzeichnet, daß im Atemluftstrom ein Flächenkühler(14,16)vorgesehen ist, welcher benachbart und in räumlichem Abstand zur Mantelfläche ( 5 ) der Chemikalpatrone (1 ) angeordnet ist.1. Respiratory protection device with regeneration of the breathing air via a C0 2 binding and 0 2 releasing chemical cartridge, which is arranged in the airway between a breathing connection and a breathing bag, characterized in that a surface cooler (14, 16) is provided in the breathing air flow, which is adjacent and in spatial distance from the outer surface (5) of the chemical cartridge (1) is arranged. 2. Atemschutzgerät nach Anspruch 1, dadurch gekennzeichnet, daß der Flächenkühler (14) ausgehend von dem Atemanschluß (13) in zwei die Mantelfläche (5 ) der Chemikalpatrone (1) umfassende Leitungszüge ( 14 ) aufgeteilt ist, welche in eine die eine Stirnfläche (2 ) der Chemikalpatrone (1) umgebende Vorkammer (11) münden.2. Respiratory protection device according to claim 1, characterized in that the surface cooler (14), starting from the breath connection (13) in two the lateral surface (5) of the chemical cartridge (1) is divided comprehensive lines (14), which in one end face ( 2) the antechamber (11) surrounding the chemical cartridge (1). 3. Atemschutzgerät nach Anspruch 1, dadurch gekennzeichnet, daß der Flächenkühler(16) als eine Bypassverbindung zwischen Atembeutel (7 ) und Atemanschluß (13) angeordnet ist und ein Rückschlagventil (17) enthält.3. Respiratory protection device according to claim 1, characterized in that the surface cooler (16) is arranged as a bypass connection between the breathing bag (7) and breathing connection (13) and contains a check valve (17). 4. Atemschutzgerät nach Anspruch 1, dadurch gekennzeichnet, daß unterhalb des Atemanschlusses (13) eine Kinnstütze (12) vorgesehen ist.4. Respiratory protection device according to claim 1, characterized in that a chin rest (12) is provided below the breathing connection (13). 5. Atemschutzgerät nach Anschluß 1, dadurch gekennzeichnet, daß die Kopfbänderung (6) an der Mantelfläche (5 ) der Chemikalpatrone (1 ) befestigt ist.5. Respiratory protective device according to connection 1, characterized in that the head strap (6) on the outer surface (5) of the chemical cartridge (1) is attached.
EP85110550A 1984-11-24 1985-08-22 Breathing protection device with air regeneration Expired EP0182979B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843442882 DE3442882A1 (en) 1984-11-24 1984-11-24 RESPIRATORY DEVICE WITH REGENERATION OF BREATHING AIR
DE3442882 1984-11-24

Publications (3)

Publication Number Publication Date
EP0182979A2 true EP0182979A2 (en) 1986-06-04
EP0182979A3 EP0182979A3 (en) 1987-01-14
EP0182979B1 EP0182979B1 (en) 1989-06-14

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EP85110550A Expired EP0182979B1 (en) 1984-11-24 1985-08-22 Breathing protection device with air regeneration

Country Status (5)

Country Link
US (1) US4665910A (en)
EP (1) EP0182979B1 (en)
JP (1) JPS61131763A (en)
DE (2) DE3442882A1 (en)
ZA (1) ZA856638B (en)

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FR2609403A1 (en) * 1987-01-09 1988-07-15 Draegerwerk Ag RESPIRATORY APPARATUS WITH RESPIRATORY AIR REGENERATION
GB2233905A (en) * 1989-07-19 1991-01-23 Sabre Safety Ltd Emergency escape breathing apparatus
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US5301665A (en) * 1991-05-05 1994-04-12 Dragerwerk Aktiengesellschaft Respirator for emergency oxygen supply for passengers in aircraft
US6340024B1 (en) 1993-01-07 2002-01-22 Dme Corporation Protective hood and oral/nasal mask
US6089230A (en) * 1998-11-03 2000-07-18 Be Aerospace Intellectual Property, Inc. Aircraft passenger oxygen delivery unit having shiftable oxygen generating candle
CA2393495C (en) * 1999-12-06 2008-10-07 Alto2Lab Limited A breathing method and apparatus
SE516250C2 (en) * 2000-04-28 2001-12-10 Oskar Fraanberg Rechargeable breathing apparatus, especially diving apparatus
SE1250965A1 (en) * 2012-08-30 2014-03-01 Oxyreb Ab Valve assembly and a re-breathing system comprising said valve assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2609403A1 (en) * 1987-01-09 1988-07-15 Draegerwerk Ag RESPIRATORY APPARATUS WITH RESPIRATORY AIR REGENERATION
GB2233905A (en) * 1989-07-19 1991-01-23 Sabre Safety Ltd Emergency escape breathing apparatus
EP0818217A1 (en) * 1996-07-11 1998-01-14 Commeinhes Remco Closed circuit breathing apparatus
FR2750869A1 (en) * 1996-07-11 1998-01-16 Commeinhes Remco BREATHING APPARATUS WITH CLOSED CIRCUIT OPERATION

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ZA856638B (en) 1986-07-30
DE3570983D1 (en) 1989-07-20
DE3442882C2 (en) 1989-03-30
DE3442882A1 (en) 1986-05-28
JPH0349270B2 (en) 1991-07-29
JPS61131763A (en) 1986-06-19
EP0182979A3 (en) 1987-01-14
EP0182979B1 (en) 1989-06-14
US4665910A (en) 1987-05-19

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