EP0029885A1 - Escape filtering apparatus with protective hood - Google Patents

Escape filtering apparatus with protective hood Download PDF

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Publication number
EP0029885A1
EP0029885A1 EP80105687A EP80105687A EP0029885A1 EP 0029885 A1 EP0029885 A1 EP 0029885A1 EP 80105687 A EP80105687 A EP 80105687A EP 80105687 A EP80105687 A EP 80105687A EP 0029885 A1 EP0029885 A1 EP 0029885A1
Authority
EP
European Patent Office
Prior art keywords
protective hood
filter device
escape
face
mask
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
EP80105687A
Other languages
German (de)
French (fr)
Other versions
EP0029885B1 (en
Inventor
Ernst Warncke
Hans-Joachim Walther
Joachim Schlobohm
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Priority to AT80105687T priority Critical patent/ATE6989T1/en
Publication of EP0029885A1 publication Critical patent/EP0029885A1/en
Application granted granted Critical
Publication of EP0029885B1 publication Critical patent/EP0029885B1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
    • A62B17/04—Hoods

Definitions

  • the invention relates to an escape filter device with a protective hood, according to the preamble of claim 1.
  • a known protective device against air pollution consists of at least one hood, which has a respirator with a filter.
  • the respirator mask and the filter are connected to each other by a connecting piece penetrating the protective hood.
  • the wearer breathes in through the filter and exhales into the interior of the hood through an opening in the face part of the respirator.
  • the exhaled air then flows out through leaks between the hood and the body parts of the wearer. It creates an air curtain that prevents unfiltered outside air from entering the interior of the hood.
  • the object of the invention is a simple escape filter device with a protective hood that provides safe breathing air conditions for the wearer in emergency situations and is suitable for all existing head sizes as well as for glasses and beard wearers.
  • the advantages of the escape filter device according to the invention lie in the design of the half-mask body with the face contact surface.
  • the face support surface fits broadly on the facial areas. It bridges the different head sizes and face shapes.
  • the profile design below the face support surface within the half-mask body creates a system pressure that is the same everywhere, which guarantees a safe system.
  • the large contact surfaces with the then small specific contact pressure are extremely comfortable for the wearer.
  • the strap can be tightened vigorously without bothering the wearer. This favors a dense plant.
  • the escape filter device consists of the protective hood 1 with the elastic neck brace 2. It can consist of one visible film, but also consist of other material. If this is not transparent, then the window section 3 is incorporated.
  • the half-mask body 4 is arranged opposite the nose and mouth area of the wearer. It penetrates tightly through the protective hood 1 with the receptacle 5 for the filter 6.
  • the protective hood 1 has lateral eyelets 7 for receiving the strap 8 a known quick adjustment can be tightened and held over the neck.
  • the face support surface 10 is pulled tight against the parts of the face.
  • the shape of the face part of the half-mask body 4 is shown in FIG. 2.
  • the cutout 11 for the nose and mouth area is relatively small in relation to the outer circumference 12 of the half-mask body 4.
  • the sealing on the face takes place via the large face contact surface 10.
  • the everywhere equally large, but comfortable contact pressure is achieved by the special design of the face part below the face support surface 10.
  • 3 shows the triangular support profile 13, which continues along the entire cutout 11 with a changing cross-sectional area. It can be made of foamed material and then filled or, as drawn in dashed lines, it can be a hollow body with walls.
  • 4 shows a further embodiment in which one side of the triangle has been omitted.
  • the sufficient rigidity of the face support surface 10 is achieved by means of intermediate walls 14 arranged at a distance from one another.
  • the section D-E in Fig. 5 shows that the support profiles 13 end in a lip-shaped system 15, which securely rests against the bridge of the nose.

Abstract

1. Escape filtering apparatus having : a protective hood (1) ; an internal half-mask (4), a face abutting portion of which is provided with a cutaway region (11) ; a respiratory filter (6), which is arranged externally of the hood in a receiving portion (5) which extends through material forming the protective hood (1) ; and a banded structure (8), which can be put on by means of lugs ; characterized in that the cutaway region (11) is bordered by a lip which forms a surface (10) for abutting the face of a wearer, in that the lip edge, which defines the cutaway region (11), is urged towards a wall of the mask and in that the mask wall, the lip and a support are constructed with a substantially triangularly-shaped cross-section and form a supporting section (13) which tapers off into a flap (15) which lies alongside the bridge of the nose.

Description

Die Erfindung betrifft ein Fluchtfiltergerät mit Schutzhaube, entsprechend dem Oberbegriff des Anspruches 1.The invention relates to an escape filter device with a protective hood, according to the preamble of claim 1.

Es wird immer wieder bekannt, daß Menschen bei Bränden, z.B. in Hotels,schwer verunglücken oder gar verbrennen. Sie scheuen sich, ohne Atemgerät in Brandgase hineinzulaufen. Einfache, griffbereite und auch von Ungeübten aufsetzbare Fluchtfilter könnten die Rettung erleichtern. Voraussetzung ist aber, daß diese Fluchtfilter für alle Kopfgrößen, bei Brillenträgern und bei Kinn- und Backenbärten ihre Schutzaufgaben erfüllen.It is known again and again that people are at fire, e.g. in hotels, badly injured or even burned. They shy away from running into fire gases without breathing apparatus. Simple, ready-to-hand escape filters, which can also be used by inexperienced users, could make rescue easier. However, the prerequisite is that these escape filters fulfill their protective tasks for all head sizes, for glasses wearers and for beards of the chin and cheeks.

Ein bekanntes Schutzgerät gegen Luftverseuchung besteht aus mindestens einer Kopfhaube, die eine Atemschutzmaske mit einem Filter besitzt. Dabei sind die Atemschutzmaske und das Filter durch ein die Schutzhaube durchdringendes Verbindungsstück miteinander verbunden. Der Träger atmet durch das Filter ein und durch eine Öffnung im Gesichtsteil der Atemschutzmaske in das Innere der Haube aus. Die Ausatemluft strömt dann durch Undichtigkeiten zwischen der Kopfhaube und den Körperpartien des Trägers ins Freie. Sie schafft dabei einen Luftvorhang, der den Eintritt von unfiltrierter Außenluft in das Innere der Haube verhindert.A known protective device against air pollution consists of at least one hood, which has a respirator with a filter. The respirator mask and the filter are connected to each other by a connecting piece penetrating the protective hood. The wearer breathes in through the filter and exhales into the interior of the hood through an opening in the face part of the respirator. The exhaled air then flows out through leaks between the hood and the body parts of the wearer. It creates an air curtain that prevents unfiltered outside air from entering the interior of the hood.

Über die Ausbildung des Gesichtsteils der Atemschutzmaske ist nichts ausgesagt. Die Darstellung zeigt aber eine im übrigen übliche Halbmaske. Sie dichtet dann auch in bekannter Art und Weise in einerDichtunqslinie an den Gesichtspartien des Trägers ab. Derartige Halbmasken sind mit der Güte der Abdichtung von der Anpassung an die jeweilige Gesichtsform und-größe abhängig. Es werden also verschiedene Größen benötigt. Sie sind damit für die Verwendung in Fluchtgeräten, die im Notfall für alle Bedrängten passen müssen, nicht geeignet.. (DE-GM 19 36 347)Nothing is said about the formation of the face part of the breathing mask. The illustration shows a half mask that is otherwise customary. It then also seals in a known manner in a sealing line on the face parts of the wearer. Such half masks depend on the quality of the seal on the adaptation to the respective face shape and size. So different sizes are needed. They are therefore not suitable for use in escape devices that have to fit all those in need in an emergency. (DE-GM 19 36 347)

Ein weiteres bekanntes Fluchtfiltergerät mit einer Schutzhaube aus einer durchsichtigen Folie zeigt diese Schwierigkeiten nicht. Statt der Atemschutzmaske ist von der Filteraufnahme her ein Atemanschlußstück in das Innere der Schutzhaube geführt, das in einem Mundstück endet. Die Schutzhaube besitzt dem Oberlippenbereich gegenüber ein Nasenpolster, für das außerhalb um die Schutzhaube herumlegbar und im Nacken verschließbar eine Bänderung vorhanden ist. Mit dem Nasenpolster werden die Nasenöffnungen dichtge- setzt.Mundstücke haben jedoch den Nachteil, daß sie mit den Zähnen gehalten werden müssen. Das kann bei Prothesenträgern zu Schwierigkeiten führen. Außerdem müssen Mundstücke für Kinder kleiner ausgeführt sein als für Erwachsene. (DE-PS 26 39 545)Another known escape filter device with a protective cover made of a transparent film does not show these difficulties. Instead of the breathing mask, a breath connection piece is guided into the interior of the protective hood from the filter receptacle and ends in a mouthpiece. The protective hood has a nose pad opposite the upper lip area, for which a strap can be placed outside around the protective hood and closed in the neck. The nasal pillows seal the nostrils. However, mouthpieces have the disadvantage that they have to be held with the teeth. This can lead to difficulties for prosthesis wearers. Mouthpieces for children must also be made smaller than for adults. (DE-PS 26 39 545)

Aufgabe der Erfindung ist ein einfaches Fluchtfiltergerät mit Schutzhaube, das in Notsituationen für den Träger sichere Atemluftbedingungen bietet und dabei für alle vorhandenen Kopfgrößen ebenso wie für Brillen- und Bartträger geeignet ist.The object of the invention is a simple escape filter device with a protective hood that provides safe breathing air conditions for the wearer in emergency situations and is suitable for all existing head sizes as well as for glasses and beard wearers.

Die Lösung der Aufgabe erfolgt gemäß dem Kennzeichen des Anspruches 1. Vorteilhafte Weiterbildungen sind in den Ansprüchen 2 bis 6 beschrieben.The problem is solved according to the characterizing part of claim 1. Advantageous further developments are in the Claims 2 to 6 described.

Die Vorteile des Fluchtfiltergerätes nach der Erfindung liegen in der Ausführung des Halbmaskenkörpers mit der Gesichtsauflagefläche. Die Gesichtsauflagefläche legt sich breit den Gesichtspartien an. Sie überbrückt damit die verschiedenen Kopfgrößen und Gesichtsformen. Die Dichtungsränder der bekannten Halbmasken, die als Liniendichtungen wirken, können das nicht. Sie sind immer irgendwo frei und ohne Anlage und damit undicht.The advantages of the escape filter device according to the invention lie in the design of the half-mask body with the face contact surface. The face support surface fits broadly on the facial areas. It bridges the different head sizes and face shapes. The sealing edges of the well-known half masks, which act as line seals, cannot do this. They are always free somewhere and without an attachment and therefore leaking.

Die Profilgestaltung unterhalb der Gesichtsauflagefläche innerhalb des Halbmaskenkörpers schafft einen überall gleich großen Anlagedruck, der eine sichere Anlage garantiert. Die großen Auflageflächen mit dem dann kleinen spezifischen Anlagedruck sind für den Träger außerordentlich bequem. Die Bänderung kann, ohne den Träger zu belästigen, kräftig angezogen werden. Dies begünstigt eine dichte Anlage. Die vorteilhaften Weiterbildungen der Unteransprüche sprechen für sich selbst.The profile design below the face support surface within the half-mask body creates a system pressure that is the same everywhere, which guarantees a safe system. The large contact surfaces with the then small specific contact pressure are extremely comfortable for the wearer. The strap can be tightened vigorously without bothering the wearer. This favors a dense plant. The advantageous developments of the subclaims speak for themselves.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden beschrieben.An embodiment of the invention is shown in the drawing and is described below.

Es zeigen

  • Fig. 1 eine Ansicht des kompletten Fluchtfiltergerätes,
  • Fig. 2 die Form des Halbmaskenkörpers in Ansicht A,
  • Fig. 3 den Schnitt B-C aus Fig. 2,
  • Fig. 4 eine weitere Ausführung an der Schnittstelle B-C
  • Fig. 5 den Schnitt D-E aus Fig. 2.
Show it
  • 1 is a view of the complete escape filter device,
  • 2 shows the shape of the half mask body in view A,
  • 3 shows the section BC from FIG. 2,
  • Fig. 4 shows another embodiment at the BC interface
  • 5 shows section DE from FIG. 2.

Das Fluchtfiltergerät besteht aus der Schutzhaube 1 mit der elastischen Halskrause 2. Sie kann aus einer durchsichtigen Folie, aber auch aus anderem Material bestehen. Wenn dieses nicht durchsichtig ist, dann ist die Fensterpartie 3 eingearbeitet. Der Nasen- und Mundpartie des Trägers gegenüber ist der Halbmaskenkörper 4 angeordnet, Er durchsetzt mit der Aufnahme 5 für das Filter 6 dicht die Schutzhaube 1. Die Schutzhaube 1 besitzt seitliche Ösen 7 zur Aufnahme der Bänderung 8. Die Bänderung 8 kann über Zuglaschen 9 durch eine bekannte Schnellverstellung über den Nacken angezogen und gehalten werden. Dabei wird die Gesichtsauflagefläche 10 dicht gegen die Gesichtspartien gezogen.The escape filter device consists of the protective hood 1 with the elastic neck brace 2. It can consist of one visible film, but also consist of other material. If this is not transparent, then the window section 3 is incorporated. The half-mask body 4 is arranged opposite the nose and mouth area of the wearer. It penetrates tightly through the protective hood 1 with the receptacle 5 for the filter 6. The protective hood 1 has lateral eyelets 7 for receiving the strap 8 a known quick adjustment can be tightened and held over the neck. The face support surface 10 is pulled tight against the parts of the face.

Die Form des Gesichtsteiles des Halbmaskenkörpers 4 zeigt die Fig. 2. Der Ausschnitt 11 für den Nasen-Mund-Bereich ist relativ klein im Verhältnis zum äußeren Umfang 12 des Halbmaskenkörpers 4. Die Abdichtung an dem Gesicht erfolgt über die große Gesichtsauflagefläche 10. Der überall gleich große, doch bequeme Anpreßdruck wird durch die besondere Ausbildunq des Gesichtsteiles unterhalb der Gesichtsauflagefläche 10 erreicht. Die Fig. 3 zeigt das dreieckförmige Auflageprofil 13, das sich mit wechselnder Querschnittsfläche an dem ganzen Auschnitt 11 entlang fortsetzt. Es kann aus geschäumtem Material und dann gefüllt oder auch, wie gestrichelt gezeichnet, ein Hohlkörper mit Wänden sein. Die Fig. 4 zeigt eine weitere Ausführung, in der die eine Dreieckseite entfallen ist. Die ausreichende Steifigkeit der Gesichtsauflagefläche 10 wird durch im Abstand zueinander senkrecht angeordnete Zwischenwände 14 erreicht.The shape of the face part of the half-mask body 4 is shown in FIG. 2. The cutout 11 for the nose and mouth area is relatively small in relation to the outer circumference 12 of the half-mask body 4. The sealing on the face takes place via the large face contact surface 10. The everywhere equally large, but comfortable contact pressure is achieved by the special design of the face part below the face support surface 10. 3 shows the triangular support profile 13, which continues along the entire cutout 11 with a changing cross-sectional area. It can be made of foamed material and then filled or, as drawn in dashed lines, it can be a hollow body with walls. 4 shows a further embodiment in which one side of the triangle has been omitted. The sufficient rigidity of the face support surface 10 is achieved by means of intermediate walls 14 arranged at a distance from one another.

Der Schnitt D-E in Fig. 5 zeigt, daß die Auflageprofile 13 in eine lippenförmige AnLage 15 auslaufen, die sich sicher dem Nasenrücken anlegt.The section D-E in Fig. 5 shows that the support profiles 13 end in a lip-shaped system 15, which securely rests against the bridge of the nose.

Claims (6)

1. Fluchtfiltergerät mit Schutzhaube und einem außerhalb in einer das Material der Schutzhaube durchsetzenden Aufnahme angeordneten Atemfilter, dadurch gekennzeichnet, daß die Aufnahme (5), die über Ösen (7) an der Schutzhaube (1) mittels einer Bänderung (8) anziehbar ist, sich in einem Halbmaskenkörper (4) fortsetzt, der in einer Gesichtsauflagefläche (10) endet, die im Nasen-Mund-Bereich einen Ausschnitt (11) besitzt.1. Escape filter device with a protective hood and a breathing filter arranged outside in a receptacle that penetrates the material of the protective hood, characterized in that the receptacle (5), which can be tightened via eyelets (7) on the protective hood (1) by means of a strap (8), continues in a half mask body (4) which ends in a face support surface (10) which has a cutout (11) in the nose-mouth area. 2. Fluchtfiltergerät nach Anspruch 1, dadurch gekennzeichnet, daß die Gesichtsauflagefläche (10) nach innen beidseitig vom Ausschnitt (11) durch ein sich im Querschnitt änderndes dreieckförmiges Auflageprofil (13) unterstützt wird.2. Escape filter device according to claim 1, characterized in that the face support surface (10) on the inside on both sides of the cutout (11) is supported by a triangular-shaped support profile (13) which changes in cross section. 3. Fluchtfiltergerät nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Auflageprofile (13) in eine sich dem Nasenrücken anlegende lippenförmige Anlage (15) auslaufen.3. Escape filter device according to claim 1 and 2, characterized in that the support profiles (13) run into a lip-shaped system (15) engaging the bridge of the nose. 4. Fluchtfiltergerät nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Halbmaskenkörper (4) aus geschäumtem elastischen Material hergestellt ist.4. escape filter device according to claim 1 to 3, characterized in that the half-mask body (4) is made of foamed elastic material. 5. Fluchtfiltergerät nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die dreieckförmigen Auflageprofile (13) als Hohlkörper ausgebildet sind.5. Escape filter device according to claim 1 to 4, characterized in that the triangular support profiles (13) are designed as hollow bodies. 6. Fluchtfiltergerät nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die dreieckförmigen Auflageprofile (13) nur zwei Seitenwände besitzen und die Steifigkeit der Gesichtsauflagefläche (10) durch im Abstand zueinander dazu senkrecht angeordnete Zwischenwände (14) erreicht ist.6. escape filter device according to claim 1 to 4, characterized in that the triangular support profiles (13) have only two side walls and the rigidity of the face support surface (10) is achieved by spaced mutually perpendicular partition walls (14).
EP80105687A 1979-12-01 1980-09-22 Escape filtering apparatus with protective hood Expired EP0029885B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105687T ATE6989T1 (en) 1979-12-01 1980-09-22 ESCAPE FILTER DEVICE WITH PROTECTIVE HOOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2948423A DE2948423C2 (en) 1979-12-01 1979-12-01 Escape filter device with protective hood
DE2948423 1979-12-01

Publications (2)

Publication Number Publication Date
EP0029885A1 true EP0029885A1 (en) 1981-06-10
EP0029885B1 EP0029885B1 (en) 1984-04-11

Family

ID=6087369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105687A Expired EP0029885B1 (en) 1979-12-01 1980-09-22 Escape filtering apparatus with protective hood

Country Status (6)

Country Link
EP (1) EP0029885B1 (en)
JP (1) JPS6054074B2 (en)
AT (1) ATE6989T1 (en)
DE (1) DE2948423C2 (en)
DK (1) DK147592C (en)
NO (1) NO148909C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2294882A (en) * 1994-11-11 1996-05-15 Warrick Ian Gorman Self rescuer apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3315941C1 (en) * 1983-05-02 1984-06-20 Drägerwerk AG, 2400 Lübeck Half mask in to and fro respiration
DE3921603A1 (en) * 1989-06-30 1991-01-10 Draegerwerk Ag RESPIRATORY MASK WITH A CUFF CHANGE
TW287952B (en) * 1994-08-31 1996-10-11 Lifepro Inc
US5964218A (en) * 1994-08-31 1999-10-12 Lifepro, Inc. Face mask with back-up smoke inhalation protection and method of operation

Citations (12)

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Publication number Priority date Publication date Assignee Title
FR622121A (en) * 1926-08-14 1927-05-24 Ver Nl Rubberfabrieken Nv Specially constructed gas mask with interior retaining rim that rests against the face
DE491273C (en) * 1928-05-10 1930-02-07 Draegerwerk Ag Half mask covering mouth and nose
FR773129A (en) * 1934-05-09 1934-11-12 Kremlin Atel Du Improvements to respiratory masks
FR801176A (en) * 1935-04-26 1936-07-29 Individual protection device against combat gases
CH196825A (en) * 1937-09-06 1938-03-31 Eduard Dr Med Imobersteg Gas mask.
FR855656A (en) * 1939-01-27 1940-05-17 Balaclava mask
US2462005A (en) * 1947-09-27 1949-02-15 American Optical Corp Face shield for use with respirators
US2529106A (en) * 1947-11-19 1950-11-07 American Optical Corp Combined hood and respirator
FR1083879A (en) * 1952-09-24 1955-01-13 Veedip Ltd Improvements to respiratory masks
US2821192A (en) * 1958-01-28 Monro
GB906251A (en) * 1959-09-09 1962-09-19 Secr Aviation Improvements in or relating to mask lip seals
DE1199620B (en) * 1963-01-18 1965-08-26 Draegerwerk Ag Gas protection hood

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE307728C (en) *
FR889783A (en) * 1943-01-11 1944-01-19 Auergesellschaft Ag Mask or hood used to connect breathing apparatus
US2583304A (en) * 1950-06-06 1952-01-22 Willson Products Inc Dust hood
DE1936347U (en) * 1965-12-17 1966-04-07 Auergesellschaft Gmbh CLOTHING TO PROTECT AGAINST AIR POLLUTION, CONSISTS OF AT LEAST A HOOD.
US3792702A (en) * 1972-04-10 1974-02-19 Ulmer & Co Soc Harness for rapidly placing in position a device such as a respirator mask
DE2639545C3 (en) * 1976-09-02 1979-04-05 Draegerwerk Ag, 2400 Luebeck Escape filter device with protective hood

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821192A (en) * 1958-01-28 Monro
FR622121A (en) * 1926-08-14 1927-05-24 Ver Nl Rubberfabrieken Nv Specially constructed gas mask with interior retaining rim that rests against the face
DE491273C (en) * 1928-05-10 1930-02-07 Draegerwerk Ag Half mask covering mouth and nose
FR773129A (en) * 1934-05-09 1934-11-12 Kremlin Atel Du Improvements to respiratory masks
FR801176A (en) * 1935-04-26 1936-07-29 Individual protection device against combat gases
CH196825A (en) * 1937-09-06 1938-03-31 Eduard Dr Med Imobersteg Gas mask.
FR855656A (en) * 1939-01-27 1940-05-17 Balaclava mask
US2462005A (en) * 1947-09-27 1949-02-15 American Optical Corp Face shield for use with respirators
US2529106A (en) * 1947-11-19 1950-11-07 American Optical Corp Combined hood and respirator
FR1083879A (en) * 1952-09-24 1955-01-13 Veedip Ltd Improvements to respiratory masks
GB906251A (en) * 1959-09-09 1962-09-19 Secr Aviation Improvements in or relating to mask lip seals
DE1199620B (en) * 1963-01-18 1965-08-26 Draegerwerk Ag Gas protection hood

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2294882A (en) * 1994-11-11 1996-05-15 Warrick Ian Gorman Self rescuer apparatus

Also Published As

Publication number Publication date
DE2948423A1 (en) 1981-06-04
NO148909C (en) 1984-01-11
DK147592C (en) 1985-04-22
NO803291L (en) 1981-06-02
DK490780A (en) 1981-06-02
DE2948423C2 (en) 1982-12-09
NO148909B (en) 1983-10-03
JPS6054074B2 (en) 1985-11-28
DK147592B (en) 1984-10-15
ATE6989T1 (en) 1984-04-15
EP0029885B1 (en) 1984-04-11
JPS5695066A (en) 1981-08-01

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