EP0011306A1 - Water collecting device for a breathing apparatus - Google Patents

Water collecting device for a breathing apparatus Download PDF

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Publication number
EP0011306A1
EP0011306A1 EP79104565A EP79104565A EP0011306A1 EP 0011306 A1 EP0011306 A1 EP 0011306A1 EP 79104565 A EP79104565 A EP 79104565A EP 79104565 A EP79104565 A EP 79104565A EP 0011306 A1 EP0011306 A1 EP 0011306A1
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EP
European Patent Office
Prior art keywords
breathing
housing
water
protection device
water collecting
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
EP79104565A
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German (de)
French (fr)
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EP0011306B1 (en
Inventor
Werner Dr. Mascher
Klaus Pampuch
Manfred Gronau
Klaus Haertle
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.)
Auergesellschaft GmbH
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Auergesellschaft GmbH
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Filing date
Publication date
Application filed by Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Priority to AT79104565T priority Critical patent/ATE1736T1/en
Publication of EP0011306A1 publication Critical patent/EP0011306A1/en
Application granted granted Critical
Publication of EP0011306B1 publication Critical patent/EP0011306B1/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
    • A62B7/00—Respiratory apparatus
    • A62B7/08—Respiratory apparatus containing chemicals producing oxygen
    • 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 protective device for breathing apparatus, in particular underwater breathing apparatus with a water-sensitive breathing canister, which is connected to a breathing tube with a mouthpiece.
  • the case may occur that when the device is put on under water, water from outside enters the mouthpiece and thus through the breathing tube into the breathing canister, even if the closure valve located in the breathing tube below the mouthpiece is operated correctly or manually. As a result, the chemical in the breathing canister is consumed in whole or in part by the water entering and the use of the breathing apparatus is thus put on hold.
  • the object of the invention is to prevent water from entering the breathing canister when the device is put on under water in an underwashing breathing apparatus with a water-sensitive breathing canister.
  • the protective device consists of a baffle with a water collecting element underneath and in the flow path of the breathing tube between the Mouthpiece and the breathing canister is arranged. Further features of the invention result from subclaims 2 to 12.
  • the advantages achieved by the invention are, in particular, that the water that gets under water into the mouth of the user when the mouthpiece is put on can be pressed through the breathing tube into the device without the function of the device being impaired thereby. In addition, it is also ensured that the respirator is protected from water in every position and can continue to be used.
  • One end of a breathing tube 6 is attached to an access from a mouthpiece to the breathing apparatus 2 by hand or automatically closes the closing valve 3, which is connected with its other end to a chemical canister 7, the outlet (not shown in the drawing) of which Breathing bag 8 is connected (Fig. 2).
  • a water collecting element 10 with the breathing tube connections 12 and 13 is interposed in the flow path of the breathing tube 6.
  • the Wasserauff angelement 10 consists of a housing 18, 19, in which a storage material 16 is arranged to hold the water by capillary forces.
  • the storage material 16 can advantageously be accommodated in an exchange cartridge 21 and the housing 18, 19 can be designed as an exchange system for the exchange cartridge 21.
  • the housing 18, 19 of the water collecting element 10 can advantageously consist of two identical housing halves 18 and 19, which are held together by a closure element 20 to be actuated from the outside (FIG. 1 ).
  • a closure element 20 to be actuated from the outside (FIG. 1 ).
  • At the periphery of the housing wall 18, 19 are angular inside Spacers 17 are arranged, which on the one hand encompass the removal cartridge 2 1 in a positionally secure manner and on the other hand create the necessary distance for producing the air flow path, so that breathing air flows around the exchange cartridge 21 on all sides in the water collecting element 10 (FIG. 1).
  • the storage material 16 can preferably be granular and z.8. be made of silica gel or alumina gel or a fibrous material and consist of 3 us glass wadding or ceramic wadding.
  • FIG. 2 shows a further exemplary embodiment of a protective device according to the invention, namely that the replacement cartridge 21 receiving the storage material 16 is designed in a ring shape, so that the free center 22 is flowed through by the breathing air.
  • the housing 18, 19 of the water collecting element 10 is in turn advantageously designed as a changing system and held together with the closure element.
  • the two housing halves 18 and 19 are designed differently here.
  • the upper housing half 18 uses a spacer ring 5 to ensure that the replacement cartridge 21 is in a secure position in the housing 18, 19.
  • the baffle plate 15 is advantageously conical.
  • the upper housing part 18 is correspondingly tightly fitted and is also conical in its shoulder region.
  • the penetrating water either flows directly (FIG. 2) or via the baffle plate 15 (FIG. 1) into the water collecting element 10 and is safely collected by the storage material 16 of the replacement cartridge 21 . This ensures that no water can penetrate into the air flow path leading to the chemical canister 7 (arrow B).
  • the capillary-active storage material 16 has the effect that the water which has been taken up is retained regardless of the position and the respirator can be used in any position protected from water.

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

Abstract

1. A water retention element for gas mask and breathing equipment, particularly of the type to be used under water, having a breathing box or canister sensitive to water, which canister being connected to a breathing tube with mouthpiece, said water retention element being so disposed as to be in the path of flow of the breathing tube between mouthpiece and breathing canister and filled with a retention or collector substance, characterized by the following features : a) the water retention element (1) is comprised of an exchange cartridge (21) containing the retention or collector substance, which cartridge being encapsulated on the bottom and periphery side in a housing (18, 19) ; b) the breathing tube (6), the housing (18, 19) and the exchange cartridge (21) is constructed in such a manner as to have the penetrating foreign water appear on the top side of the exchange cartridge (21) and the breathing air charged with humidity pass radially and to the outside over the surface of the cartridge ; and c) a spacer (17) is provided between the exchange cartridge (21) and the housing (18, 19) and mounted in such a manner that the breathing air between the inner circumference of the housing and the outer circumference of the exchange cartridge (21) may flow into the bottom region of the housing (18, 19) and from there into the breathing tube (6) located at the bottom of the housing (18, 19).

Description

Die Erfindung betrifft eine Schutzeinrichtung für Atemschutzgeräte, insbesondere Unterwasser-Atemschutzgeräte mit wasserempfindlichem Atemkanister, der mit einem Atemschlauch mit Mundstück verbunden ist.The invention relates to a protective device for breathing apparatus, in particular underwater breathing apparatus with a water-sensitive breathing canister, which is connected to a breathing tube with a mouthpiece.

Bei bekannten Geräten kann der Fall eintreten, daß beim Anlegen des Gerätes unter Wasser von außen Wasser in das Mundstück und damit durch den Atemschlauch in den Atemkanister gelangt, auch wenn das im Atemschlauch unterhalb des Mundstücks befindliche Verschlußventil von Hand oder automatisch richtig betätigt wird. Das hat zur Folge, daß durch das eintretende Wasser das im Atemkanister befindliche Chemikal ganz oder teilweise verbraucht wird und damit der Einsatz des Atemschutzgerätes in Frnge gestellt wird.In known devices, the case may occur that when the device is put on under water, water from outside enters the mouthpiece and thus through the breathing tube into the breathing canister, even if the closure valve located in the breathing tube below the mouthpiece is operated correctly or manually. As a result, the chemical in the breathing canister is consumed in whole or in part by the water entering and the use of the breathing apparatus is thus put on hold.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Unterwacser-Atemschutzgerät mit Wasserempfindlichem Atemkanister ein Eindringen von Wasser in den Atemkanister beim Anlegen des Gerätes unter Wasser zu verhindern.The object of the invention is to prevent water from entering the breathing canister when the device is put on under water in an underwashing breathing apparatus with a water-sensitive breathing canister.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Schutzeinrichtung aus einem Verschlußvantll mit darunter liegendem Wasserauffangelement besteht und im Strömungsweg des Atemschlauchs zwischen dem Mundstück und dem Atemkanister angeordnet ist. Weitere Merkmale der Erfindung ergeben sich aus den Unteransprüchen 2 bis 12.This object is achieved in that the protective device consists of a baffle with a water collecting element underneath and in the flow path of the breathing tube between the Mouthpiece and the breathing canister is arranged. Further features of the invention result from subclaims 2 to 12.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß das Wasser, das beim Anlegen des Mundstücks unter Wasser in den Mund des Benutzers gelangt, durch den Atemschlauch in das Gerät gedrückt werden kann, ohne daß dadurch die Funktion des Gerätes beeinträchtigt wird. Darüberhinaus ist auch gewährleistet, daß das Atemschutzgerät in jeder Lage vor Wasser geschützt ist und weiter benutzt werden kann.The advantages achieved by the invention are, in particular, that the water that gets under water into the mouth of the user when the mouthpiece is put on can be pressed through the breathing tube into the device without the function of the device being impaired thereby. In addition, it is also ensured that the respirator is protected from water in every position and can continue to be used.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen:

  • Fig. 1 eine schematische Darstellung der erfindungsgemä3en Schutzeinrichtung und
  • Fig. 2 ein weiteres Ausführungsbeispiel der Schutzeinrichtung
Embodiments of the invention are shown in the drawing and are described in more detail below. Show it:
  • Fig. 1 is a schematic representation of the protective device according to the invention and
  • Fig. 2 shows another embodiment of the protective device

An einem den Zugang von einem Mund-stück zum Atemschutzgerät 2 von Hand oder automatisch verschließenden Verschlu3ventil 3 ist ein Ende eines Atemschlauchs 6 befestigt, der mit serem anderen Ende an einem Chemikalkanister 7 angeschlossen ist, dessen Austritt (in der Zeichnung nicht dargestellt) mit dem Atembeutel 8 in Verbindung steht (Fig. 2). Im Strömungsweg des Atemschlauchs 6 ist ein Wasserauffangelement 10 mit den Atemschlauchanschlüssen 12 und 13 zwischengeschaltet.One end of a breathing tube 6 is attached to an access from a mouthpiece to the breathing apparatus 2 by hand or automatically closes the closing valve 3, which is connected with its other end to a chemical canister 7, the outlet (not shown in the drawing) of which Breathing bag 8 is connected (Fig. 2). A water collecting element 10 with the breathing tube connections 12 and 13 is interposed in the flow path of the breathing tube 6.

Das Wasserauff angelement 10 besteht aus einem Gehäuse 18, 19, in das ein das Wasser durch Kapillarkräfte festhaltendes Speichermaterial 16 angeordnet ist. Das Speichermaterial 16 kann vorteilhaft in einer Auswechselpatrone 21 untergebracht und das Gehäuse 18, 19 als Wechselsystem für die Auswechselpatrone 21 ausgebildet sein.The Wasserauff angelement 10 consists of a housing 18, 19, in which a storage material 16 is arranged to hold the water by capillary forces. The storage material 16 can advantageously be accommodated in an exchange cartridge 21 and the housing 18, 19 can be designed as an exchange system for the exchange cartridge 21.

Das Gehäuse 18, 19 des Wasserauffangelementes 10 kann vorteilhaft aus zwei gleichen Gehäusehälften 18 und 19 bestehen, die durch ein von außen zu betätigendes Verschlußelement 20 zusammengehalten werden (Fig. 1). Am Umfang der Gehäusewand 18, 19 sind innen winkelförmige Distanzstücke 17 angeordnet, die einerseits die Ausmechselpatrone 21 lagesicher umfassen und andererseits den erforderlichen Abstand zur Herstellung des Luftströmungsweges schaffen, so da3 die Auswechselpatrone 21 im Wasserauffangelement 10 allseitig von Atemluft umströmt wird (Fig. 1).The housing 18, 19 of the water collecting element 10 can advantageously consist of two identical housing halves 18 and 19, which are held together by a closure element 20 to be actuated from the outside (FIG. 1 ). At the periphery of the housing wall 18, 19 are angular inside Spacers 17 are arranged, which on the one hand encompass the removal cartridge 2 1 in a positionally secure manner and on the other hand create the necessary distance for producing the air flow path, so that breathing air flows around the exchange cartridge 21 on all sides in the water collecting element 10 (FIG. 1).

Das Speichermaterial 16 kann vorzugsweise gekörnt sein und z.8. aus Kieselgel oder Tonerdegel oder aber ein faserförmiges Material sein und z.a. 3us Glaswatte oder aus Keramikwatte bestehen.The storage material 16 can preferably be granular and z.8. be made of silica gel or alumina gel or a fibrous material and consist of 3 us glass wadding or ceramic wadding.

In Fig. 2 ist ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Schutzeinrichtung dargestellt, und zwar ist die das Speichermaterial 16 aufnehmende Auswechselpatrone 21 ringförmig ausgebildet, so daß das freie Zentrum 22 von der Atemluft durchströmt wird. Das Gehäuse 18, 19 des Wasserauffangelementes 10 ist vorteilhaft wiederum als Wechselsystem gestaltet und mit dem Verschlußelement zusammengehalten. Die beiden Gehäusehälften 18 und 19 sind hier jedoch verschieden ausgebildet. Die obere Gehäusehälfte 18 sorgt durch einen Distanzring 5 für die lagesichere Position der Auswechselpatrone 21 im Gehäuse 18, 19. Im Bereich der oberen Gehäusehälfte 18 befindet sich innen ein Prallblech 15, das den zentralen Strömungsweg für die Atemluft überdacht.FIG. 2 shows a further exemplary embodiment of a protective device according to the invention, namely that the replacement cartridge 21 receiving the storage material 16 is designed in a ring shape, so that the free center 22 is flowed through by the breathing air. The housing 18, 19 of the water collecting element 10 is in turn advantageously designed as a changing system and held together with the closure element. However, the two housing halves 18 and 19 are designed differently here. The upper housing half 18 uses a spacer ring 5 to ensure that the replacement cartridge 21 is in a secure position in the housing 18, 19. In the area of the upper housing half 18 there is an inside baffle plate 15, which covers the central flow path for the breathing air.

Das Prallblech 15 ist vorteilhaft kegelförmig ausgebildet. Das Gehäuseoberteil 18 ist entsprechend engepaßt und in seinem Schulterbereich ebenfalls kegelfärmig ausgebildet.The baffle plate 15 is advantageously conical. The upper housing part 18 is correspondingly tightly fitted and is also conical in its shoulder region.

Wie aus den Figuren 1 und 2 ersichtlich ist, fließt das eindringende wasser (Pfeil A) entweder direkt (Fig. 2) oder über das Prallblech 15 (Fig. 1) in das Wasserauffangelement 10 und wird von dem Speichermaterial 16 der Auswechselpatrone 21 sicher aufgefangen. Damit ist gewährleistet, daß kein Wasser im zum Chemikalkanister 7 führenden Luftströmungsweg (Pfeil B) eindringen kann.As can be seen from FIGS. 1 and 2, the penetrating water (arrow A) either flows directly (FIG. 2) or via the baffle plate 15 (FIG. 1) into the water collecting element 10 and is safely collected by the storage material 16 of the replacement cartridge 21 . This ensures that no water can penetrate into the air flow path leading to the chemical canister 7 (arrow B).

Das kapillaraktive Speichermaterial 16 bewirkt, daß das einmal aufgenommene Wasser lageunabhängig festgehalten wird und das Atemschutzgerät in jeder Lage geschützt vor Wasser weiter benutzt werden kann.The capillary-active storage material 16 has the effect that the water which has been taken up is retained regardless of the position and the respirator can be used in any position protected from water.

Claims (12)

1. Schutzeinrichtung für Atemschutzgeräte, insbesondere Unterwasser-Atemschutzgeräte mit wasserempfindlichem Atemkanister, der mit einem Atemschlauch mit Mundstück verbunden ist, dadurch gekennzeichnet , daß die Schutzeinrichtung aus einem Verschlußventil -(3) mit darunger liegendem Wasserauffangelement (10) besteht und im Strömungsweg des Atemschlauchs (6) zwischen dem Mundstück (1) und dem Atemkanister (7) angeordnet ist.1. Protective device for breathing apparatus, in particular underwater breathing apparatus with a water-sensitive breathing canister, which is connected to a breathing tube with a mouthpiece, characterized in that the protective device consists of a closure valve (3) with a water collecting element (10) lying thereunder and in the flow path of the breathing tube ( 6) is arranged between the mouthpiece (1) and the breathing canister (7). 2. Schutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet , daß das Wasserauffangelement (10) mit einem Speichermaterial (16) gefüllt ist, das Wasser durch Kapillarkräfte festhält.2. Protection device according to claim 1, characterized in that the water collecting element (10) is filled with a storage material (16) which holds water by capillary forces. 3. Schutzeinrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet , da3 das Speichermaterial (1G) gekörnt ist und z.B. aus Kieselgel oder Tonerdegel besteht.3. Protective device according to claim 1 and 2, characterized in that the storage material (1G) is grained and e.g. consists of silica gel or alumina gel. 4. Schutzeinrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet , daß das Speichermaterial faserförmig ist und z.B. aus Glaswatte oder Keramikwatte besteht.4. Protection device according to claim 1 and 2, characterized in that the storage material is fibrous and e.g. consists of glass wadding or ceramic wadding. 5. Schutzeinrichtung nach Anspruch 1 bis 4, dadurch gekennzeichnet , daß das Speichermaterial (16) in einer Auswechselpatrcne (21) untergebracht ist.5. Protection device according to claim 1 to 4, characterized in that the storage material (16) is housed in an exchange cartridge (21). 6. Schutzeinrichtung nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet , daß dao Wesserauffangelement (10) aus einem Gehäuse (13,19) besteht, das als WechgGelsystem für die Auswechselpatrone (21) zusgabildet ist.6. Protection device according to claims 1 to 5, characterized in that dao water collecting element (10) consists of a housing (13, 19) which is added as a change gel system for the replacement cartridge (21). 7. Schutzeinrichtung noch den Ansprüchen 1 und 6, dadurch gekennzeichnet, daß das Gehäuse des Wsserauffangelementes (10) aus zwei gleichen Gahäusahälften (13,19) besteht, die durch ein von außen zu betätigendes Verschlußelement (20) zusammengehalten werden.7. Protection device still claims 1 and 6, characterized in that the housing of the water collecting element (10) consists of two identical Gahäusahälften (13,19), which are held together by an externally operated closure element (20). 8. Schutzeinrichtung nach den Ansprüchen 1 und 5, dadurch gekennzeichnet , daß die Auswechselpatrone (21) im Gehäuse (18,19) allseitig von Atemluft umströmt wird (Fig. 1).8. Protective device according to claims 1 and 5, characterized in that the replacement cartridge (21) in the housing (18, 19) is surrounded by breathing air on all sides (Fig. 1). 9. Schutzeinrichtung nach den Ansprüchen 1 und 5, dadurch gekennzeichnet , daß die Auswechsalpatrone (21) ringförmig ausgebildet ist und ein freies Zentrum (22) von der Atemluft durchströmt wird (Fig. 2).9. Protection device according to claims 1 and 5, characterized in that the replacement cartridge (21) is annular and a free center (22) is flowed through by the breathing air (Fig. 2). 10. Schutzeinrichtung nach den Ansprüchen 1 und 9, dadurch gekennzeichnet , da3 das freie Zentrum (22) mit einer Prallplatte (15) überdacht ist.10. Protection device according to claims 1 and 9, characterized in that the free center (22) is covered with a baffle plate (15). 11. Schutzeinrichtung nach den Ansprüchen 1 und 10, dadurch gekennzeichnet , daß die Prallplatte (15) kegelförmig ausgebildet ist.11. Protection device according to claims 1 and 10, characterized in that the baffle plate (15) is conical. 12. Schutzeinrichtung n3ch den Ansprüchen 1, 9 und 10, dadurch gekennzeichnet , daß das Gehäuseoberteil (18) des Wasserauffangelementes (10) entsprechend kegelförmig ausgebildet ist.12. Protective device n 3 ch claims 1, 9 and 10, characterized in that the upper housing part (18) of the water collecting element (10) is correspondingly conical.
EP79104565A 1978-11-20 1979-11-19 Water collecting device for a breathing apparatus Expired EP0011306B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104565T ATE1736T1 (en) 1978-11-20 1979-11-19 WATER COLLECTION DEVICE FOR RESPIRATORY PROTECTION DEVICES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2850686 1978-11-20
DE2850686A DE2850686C3 (en) 1978-11-20 1978-11-20 Protective device for breathing apparatus

Publications (2)

Publication Number Publication Date
EP0011306A1 true EP0011306A1 (en) 1980-05-28
EP0011306B1 EP0011306B1 (en) 1982-11-03

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ID=6055360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104565A Expired EP0011306B1 (en) 1978-11-20 1979-11-19 Water collecting device for a breathing apparatus

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EP (1) EP0011306B1 (en)
AT (1) ATE1736T1 (en)
DE (1) DE2850686C3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275612A (en) * 1993-02-11 1994-09-07 Coal Ind Improvements in or relating to respiratory protective equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE208565C (en) *
GB271478A (en) * 1926-05-20 1928-06-07 Deutsche Gasgluhlicht Auer-Gesellschaft M.B.H.
DE1246414B (en) * 1966-03-29 1967-08-03 Auergesellschaft Gmbh Breathing apparatus with pendulum breathing
DE2410684A1 (en) * 1974-03-06 1975-09-25 Vnii Gornospasatelnowo Dela Closed circuit breathing appts. - with regenerating cartridge containing oxygen liberating material consumed without forming alkaline vapours

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE385700C (en) * 1921-08-20 1923-12-13 Hanseatische Appbau Ges Vorm L Closed breathing apparatus for exposure to toxic gases
US4090511A (en) * 1977-03-23 1978-05-23 Mine Safety Appliances Company Mouthpiece valve for escape breathing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE208565C (en) *
GB271478A (en) * 1926-05-20 1928-06-07 Deutsche Gasgluhlicht Auer-Gesellschaft M.B.H.
DE1246414B (en) * 1966-03-29 1967-08-03 Auergesellschaft Gmbh Breathing apparatus with pendulum breathing
DE2410684A1 (en) * 1974-03-06 1975-09-25 Vnii Gornospasatelnowo Dela Closed circuit breathing appts. - with regenerating cartridge containing oxygen liberating material consumed without forming alkaline vapours

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275612A (en) * 1993-02-11 1994-09-07 Coal Ind Improvements in or relating to respiratory protective equipment

Also Published As

Publication number Publication date
ATE1736T1 (en) 1982-11-15
EP0011306B1 (en) 1982-11-03
DE2850686A1 (en) 1980-05-22
DE2850686C3 (en) 1981-05-27
DE2850686B2 (en) 1980-10-02

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