EP0782468B1 - Shielding mask - Google Patents

Shielding mask Download PDF

Info

Publication number
EP0782468B1
EP0782468B1 EP95929900A EP95929900A EP0782468B1 EP 0782468 B1 EP0782468 B1 EP 0782468B1 EP 95929900 A EP95929900 A EP 95929900A EP 95929900 A EP95929900 A EP 95929900A EP 0782468 B1 EP0782468 B1 EP 0782468B1
Authority
EP
European Patent Office
Prior art keywords
mask
hood
visor
inhale
wearer
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
EP95929900A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0782468A1 (en
Inventor
Stefan Sandbacka
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.)
Scott Health and Safety Oy
Original Assignee
Kemira Safety Oy
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 Kemira Safety Oy filed Critical Kemira Safety Oy
Publication of EP0782468A1 publication Critical patent/EP0782468A1/en
Application granted granted Critical
Publication of EP0782468B1 publication Critical patent/EP0782468B1/en
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

  • the present invention relates to a protective mask which comprises a mantle covering the wearer's face and having a visor of a transparent material, inside the mantle an inner mask surrounding the nose and the mouth, and inhale and exhale conduits communicating with the inner mask.
  • the breathable air or oxygen is directed via a tube coming from a container or via a filter belonging to the mask to the interior of the mask, into the region of the visor.
  • This flow of oxygen or air continues via a valve to the inner mask inside the mantle, from where it is finally discharged as exhaled air into the exhale conduit of the mask.
  • the purpose of the inflow stream bypassing the visor is to maintain the visor clear, i.e. free from moisture condensed from the wearer's exhaled air.
  • the object of the present invention is to provide a simple protective mask, fitting as such most wearers, in which mask the above-mentioned deficiencies of known masks are avoided. It is characteristic of the invention that the mantle of the mask is made up of a hood of a membrane-like rubber or plastic material, enclosing the wearer's entire head and sealing around the wearer's neck, and that the visor is of an elastic plastic material flexing together with the hood, the thickness of the material being at maximum approx. 1 mm.
  • the seal is effected by means of a resilient collar which seals against the wearer's neck irrespective of the size of the neck.
  • a loose, elastic hood of a membrane-like material can thus be dimensioned so as to be sufficiently loose to fit different wearers regardless of head size and potential wearing of eyeglasses. No lenses or other such wearer-specific fittings are necessary in the mask according to the invention.
  • the visor belonging to the membrane-like loose hood is according to the invention of a thin elastic plastic material which adjoins smoothly the material of the hood, flexing together with it.
  • the thin visor provides the advantage that it can be warmed up rapidly with a hand in order to dry any moisture possibly condensed on its inside.
  • the material thickness of the visor is suitably 0.5-1 mm, optimally approx. 0.75 mm, a suitable material being for example PVC.
  • the collar portion of the hood may according to the invention be, for example, of a resilient latex rubber having a thickness within the range 0.05-1.5 mm.
  • the hood may be, for example, of PVC, and it may be equipped with a textile coating.
  • the thickness of the hood may be within the range 0.05-2 mm, preferably within the range 0.15-0.5 mm.
  • the protective mask according to the invention may be equipped with a filter which purifies the inhale air, or it may alternatively be connected by means of a tube to an oxygen or compressed-air container.
  • a filter When a filter is used, a vacuum is formed inside the mantle of the mask, and when oxygen or air supplied from a container is used, an overpressure is generated. In either case the resilient, sealing collar part of the hood will prevent leakages between the interior of the mask and the outside air.
  • the mask 1 comprises a hood 2 which encloses the wearer's entire head, the collar 3 of the hood being arranged to seal around the wearer's neck.
  • the hood 2 is of a flexible, membrane-like, uncoated, opaque plastic material, such as PVC, having a thickness of approx. 0.2 mm.
  • the collar 3 is of a resilient latex rubber having a thickness of approx. 0.2 mm. The purpose of the collar 3 is to prevent any leakages between the interior of the hood 2 and the outside air.
  • the hood 2 of the mask is further equipped with a visor 4, which is of a clear, transparent plastic material, such as PVC, having a thickness of approx. 0.75 mm.
  • the elastic visor 4 bends together with the hood 2 portions surrounding it; this facilitates the handling of the mask and improves its durability, for example, by reducing the susceptibility of the mask to rupture.
  • hood 2 Inside the hood 2 in the mask there is a separate inner mask 5, which is tightened by means of fastening straps 6 around the wearer's nose and mouth.
  • the fastening straps 6 are adjustable in length and attached to the inner surface of the hood 2.
  • the protective mask 1 is equipped with an inhale filter 7 for purifying the inhale air entering the mask.
  • an inhale filter 7 for purifying the inhale air entering the mask.
  • a vacuum is formed inside the hood 2 as the sealing collar 3 prevents leakages from the outside air into the mask.
  • the mask 1 can be connected to a pressurized oxygen or air tube (not shown) leading from a container, in which case overpressure is formed inside the mask as the collar 3 prevents any outward leakages.
  • the inhale conduit leading via the filter 7 to the interior of the hood 2 of the mask is shown in Figure 2 by an arrow 8 indicating the inflow air stream.
  • the air stream enters the visor space 9 surrounding the inner mask 5, and in this space it is used for keeping the visor 4 clean of moisture which would otherwise tend to condense from the exhale air onto the inner surface of the visor. From the visor space 9 the air stream continues, in accordance with arrow 10 in Figure 2, via the flap valves 11 in the inner mask 5, to serve as inhale air inside the inner mask. Exhale air leaves the inner mask 5 along the exhale conduit shown by arrow 12 in Figure 2 to the outside air.

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)
EP95929900A 1994-09-06 1995-09-05 Shielding mask Expired - Lifetime EP0782468B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI944091 1994-09-06
FI944091A FI100640B (sv) 1994-09-06 1994-09-06 Skyddsmask
PCT/FI1995/000472 WO1996007452A1 (en) 1994-09-06 1995-09-05 Shielding mask

Publications (2)

Publication Number Publication Date
EP0782468A1 EP0782468A1 (en) 1997-07-09
EP0782468B1 true EP0782468B1 (en) 2000-07-05

Family

ID=8541308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95929900A Expired - Lifetime EP0782468B1 (en) 1994-09-06 1995-09-05 Shielding mask

Country Status (5)

Country Link
EP (1) EP0782468B1 (sv)
AU (1) AU3347695A (sv)
DE (1) DE69517817D1 (sv)
FI (1) FI100640B (sv)
WO (1) WO1996007452A1 (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0203701D0 (en) 2002-02-16 2002-04-03 Secr Defence Respirators
SE531310C2 (sv) 2005-04-12 2009-02-17 Interspiro Ab Andningsmask
KR101136999B1 (ko) * 2010-11-11 2012-04-19 김창용 비상용 방독면
FR3107190A1 (fr) * 2020-02-19 2021-08-20 Arnaud Vautier Kit d’evacuation d’urgence pour particuliers
WO2022009214A1 (en) * 2020-07-10 2022-01-13 Philip Daniel A face shield for protection from environmental hazard

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484575A (en) * 1983-01-13 1984-11-27 E. D. Bullard Company Loose fitting supplied air respirator hood
DE3921603A1 (de) * 1989-06-30 1991-01-10 Draegerwerk Ag Atemschutzmaske mit einer manschettenbaenderung
EP0470791A3 (en) * 1990-08-10 1992-04-22 Sabre Safety Limited Emergency escape breathing apparatus
FI96279C (sv) * 1992-03-06 1996-06-10 Kemira Oy Andningsskydd med huva och därtill fäst filter

Also Published As

Publication number Publication date
FI944091A (sv) 1996-03-07
FI944091A0 (fi) 1994-09-06
WO1996007452A1 (en) 1996-03-14
FI100640B (sv) 1998-01-30
DE69517817D1 (de) 2000-08-10
EP0782468A1 (en) 1997-07-09
AU3347695A (en) 1996-03-27

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