EP0632736B1 - Appareil respiratiore de protection de la respiration - Google Patents

Appareil respiratiore de protection de la respiration Download PDF

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Publication number
EP0632736B1
EP0632736B1 EP92918936A EP92918936A EP0632736B1 EP 0632736 B1 EP0632736 B1 EP 0632736B1 EP 92918936 A EP92918936 A EP 92918936A EP 92918936 A EP92918936 A EP 92918936A EP 0632736 B1 EP0632736 B1 EP 0632736B1
Authority
EP
European Patent Office
Prior art keywords
hood
reservoir
breathable gas
mask
breathing apparatus
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.)
Expired - Lifetime
Application number
EP92918936A
Other languages
German (de)
English (en)
Other versions
EP0632736A1 (fr
Inventor
Brian John Richards
John Stewart Simpson Stewart
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0632736A1 publication Critical patent/EP0632736A1/fr
Application granted granted Critical
Publication of EP0632736B1 publication Critical patent/EP0632736B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

  • This invention relates to breathing apparatus for respiratory protection of civilians and combatants.
  • the neck seal of the hood which forms an integral part of the breathing apparatus, may be sealed by a draw string (W082/02492, EPO275934A2) but much inward leakage of the noxious external atmosphere takes place past this type of seal.
  • An elasticated septal neck seal (GB2129670A) allows less leakage but the leakage may be further reduced by having a positive pressure inside the hood.
  • a positive pressure may be achieved by passing exhaled gas to the hood space (GB2211098A, GB2164570A) but such designs are defective because the moisture in the exhaled gas impairs vision.
  • exhaled gas is passed into a chamber between a hood and an inner flexible membrane attached to the hood.
  • Positive pressure breathing apparatus is well known (GB 1587121, GB 2074456A).
  • a reservoir is described between two hoods and it differs from GB 2074456A in that complex pressure reducing valves are not required.
  • a positive pressure is achieved by passing dry gas under pressure and at constant flow directly into the hood space reservoir. There is virtually no inward leakage past the neck seal if the hood space remains at positive pressure and this is ensured if the volume of the reservoir is in excess of the breathing volume of the wearer and if the inlet and outlet valves are set at appropriate opening pressures.
  • the present invention discloses breathing apparatus having a reservoir, in the hood space between inner and outer hoods, filled with dry breathable gas to prevent misting and under positive pressure to prevent inward leakage; having the inner hood elasticated to support the conveyance means, to pull it onto the face and to secure a good fit, and having an open circuit with one way valves to ensure that there is high performance with very low dead space and high efficiency.
  • breathing apparatus to provide respiratory protection has an outer hood, an inner hood, a reservoir at positive pressure, a breathable gas source and a mask with one way valves in a circuit system such that:
  • figure 1 shows the breathing apparatus as worn by a subject and having the component parts numbered as above.
  • the breathing apparatus is donned by stretching the opening 3 of the neck seal 2 and pulling the outer hood 1 over the head. This is attached 13 to the inner hood 7 which is therefore also pulled onto the head.
  • the closely fitting inner hood 7 is also attached to the rim 6 of the conveyance means or mask 4 which is correctly positioned by the act of donning the hood 7 with the opening 14 at the front.
  • the breathable gas source 11 is activated manually by the switch 12 and fills the reservoir 8 with breathable gas under pressure. On inspiration, breathable gas is sucked in through the inlet valve 9 and the cavity 5 of the mask 4 to the lungs. On expiration, exhaled gas passes through the cavity 5 of the mask 4 and the outlet valve 10 to the external ambient atmosphere 15. Positive pressure in the reservoir 8 is maintained by an appropriate setting for the opening pressure of one or other or both of the valves 9 and 10.
  • the outer hood may be fire proof; the entire outer hood or only a part of it may be transparent; a draw string may be fitted round the neck; the conveyance means may be a mouth piece, oro nasal mask, full face mask; the inner hood may be elasticated in more than one dimension; the inner hood attachment to the conveyance means rim may be direct or indirect and may be complete or incomplete; the conveyance means rim may be shaped to the face and nose; the breathable gas may be air, oxygen or mixed gas, compressed or chemically generated; a reducing valve may be required between the compressed gas cylinder and the reservoir; a relief valve may be required to prevent over pressurization of the reservoir; release of gas may be activated manually, automatically or on demand; there may be two eye openings with a central part or cord to prevent deformation of the opening or openings; there may be a plurality of inlet and outlet valves; the inner hood may support and carry the breathable gas source and container; an external or remote gas source may be added; the

Landscapes

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

Claims (4)

  1. Appareil respiratoire destiné à assurer une protection respiratoire, possédant un casque extérieur (1), un casque intérieur (7), un réservoir (8) sous pression positive, une source (11) de gaz respirable et un masque (4) avec des soupapes (9, 10) à une voie dans un système de circuit tel que :
    (A) le casque extérieur soit :
    (i) réalisé dans un matériau imperméable étanche aux gaz,
    (ii) transparent au moins en partie,
    (iii) complété par un joint élastique au niveau du cou ;
    (B) le casque intérieur soit :
    (i) ajusté sur la tête,
    (ii) réalisé en matériau élastique,
    (iii) rendu solidaire du casque extérieur,
    (iv) rendu solidaire du rebord du masque pour le maintenir et attirer le rebord sur le visage ;
    (C) le réservoir soit :
    (i) situé dans l'espace situé entre les casques intérieur et extérieur,
    (ii) construit avec un volume excédant le volume respiratoire de l'utilisateur ;
    (D) la source de gaz respirable décharge du gaz respirable sec directement dans le réservoir pour l'amener sous pression positive et
    (E) le masque recouvre la bouche de l'utilisateur et possède :
    (i) une soupape d'entrée (9) à une voie qui permet au gaz respirable de passer du réservoir à la cavité du masque, et
    (ii) une soupape de sortie (10) à une voie qui permet au gaz respirable de passer de la cavité du masque à l'atmosphère ambiante.
  2. Appareil respiratoire selon la Revendication 1, dans lequel la source de gaz respirable est de l'air comprimé.
  3. Appareil respiratoire selon la Revendication 1 ou 2, dans lequel les pressions d'ouverture des soupapes d'entrée et de sortie sont réglées pour maintenir une pression positive dans le réservoir.
  4. Appareil respiratoire selon l'une quelconque des Revendications précédentes, lequel est pourvu d'une soupape "à la demande" (manuelle).
EP92918936A 1991-09-12 1992-09-10 Appareil respiratiore de protection de la respiration Expired - Lifetime EP0632736B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9119441 1991-09-12
GB919119441A GB9119441D0 (en) 1991-09-12 1991-09-12 Breathing apparatus
PCT/GB1992/001656 WO1994019055A1 (fr) 1991-09-12 1992-09-10 Appareil respiratoire de protection de la respiration

Publications (2)

Publication Number Publication Date
EP0632736A1 EP0632736A1 (fr) 1995-01-11
EP0632736B1 true EP0632736B1 (fr) 1998-08-26

Family

ID=10701254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918936A Expired - Lifetime EP0632736B1 (fr) 1991-09-12 1992-09-10 Appareil respiratiore de protection de la respiration

Country Status (6)

Country Link
EP (1) EP0632736B1 (fr)
AU (1) AU679900B2 (fr)
CA (1) CA2134069A1 (fr)
DE (1) DE69226784T2 (fr)
GB (1) GB9119441D0 (fr)
WO (1) WO1994019055A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101894203B1 (ko) * 2018-01-25 2018-08-31 이일형 호흡용 공기취입식 후드

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO178529C (no) * 1991-08-27 1996-04-17 Ottestad Nils T Selvforsynt nödpusteinnretning
US5687713A (en) * 1991-11-29 1997-11-18 Bahr; Erik W. Breathing mask
SE511289C2 (sv) † 1995-07-05 1999-09-06 Comasec International Sa Andningsutrustning för utrymningsändamål med optimal användning av tillförd andningsgas
AUPO126596A0 (en) 1996-07-26 1996-08-22 Resmed Limited A nasal mask and mask cushion therefor
GB0210417D0 (en) 2002-05-08 2002-06-12 Qinetiq Ltd Respirator assembly
DE102007042733A1 (de) * 2006-11-15 2008-06-05 Weinmann Geräte für Medizin GmbH + Co. KG Beatmungsvorrichtung mit physiognomisch adaptierbarer Bauteilkomponente
US20240226614A9 (en) * 2022-10-25 2024-07-11 Us Army Protective Headwear, Garment Assembly and Method of Donning
CN116440430B (zh) * 2023-04-18 2023-11-17 中国人民解放军军事科学院系统工程研究院 一种供氧面罩及具有其的吸氧装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015584C2 (de) * 1980-04-23 1982-03-25 Drägerwerk AG, 2400 Lübeck Druckgasbelüfteter Schutzanzug mit Atemschutzgerät
DE3667028D1 (en) * 1985-03-12 1989-12-28 Du Pont Decompression and toxic fume protection apparatus
AU1872088A (en) * 1987-07-29 1989-02-02 British Petroleum Company Plc, The Breathing apparatus
FR2646781B1 (fr) * 1989-05-12 1994-02-04 Lemasson Yves Dispositif et ensemble respiratoires, notamment pour ambiance irrespirable, en particulier pour milieu contamine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101894203B1 (ko) * 2018-01-25 2018-08-31 이일형 호흡용 공기취입식 후드
WO2019146915A1 (fr) * 2018-01-25 2019-08-01 이일형 Cagoule de type gonflable pour la respiration

Also Published As

Publication number Publication date
AU679900B2 (en) 1997-07-17
AU2504992A (en) 1994-09-14
GB9119441D0 (en) 1991-10-23
EP0632736A1 (fr) 1995-01-11
DE69226784T2 (de) 1999-07-01
DE69226784D1 (de) 1998-10-01
WO1994019055A1 (fr) 1994-09-01
CA2134069A1 (fr) 1994-09-01

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