EP0511593A1 - Vollsichtschutzmaske für Intervenienzarbeiten in verschmutzten Umgebungen - Google Patents

Vollsichtschutzmaske für Intervenienzarbeiten in verschmutzten Umgebungen Download PDF

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Publication number
EP0511593A1
EP0511593A1 EP92106984A EP92106984A EP0511593A1 EP 0511593 A1 EP0511593 A1 EP 0511593A1 EP 92106984 A EP92106984 A EP 92106984A EP 92106984 A EP92106984 A EP 92106984A EP 0511593 A1 EP0511593 A1 EP 0511593A1
Authority
EP
European Patent Office
Prior art keywords
mask according
mask
opening
transparent screen
screen
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
EP92106984A
Other languages
English (en)
French (fr)
Other versions
EP0511593B1 (de
EP0511593B2 (de
Inventor
Andrea Cristiani
Baldassare Genova
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.)
DISPOSITIVI PROTEZIONE INDIVIDUALE - D.P.I. S.R.L.
Original Assignee
Dispositivi Protezione Individuale - Dpi Srl
Sekur SpA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11359800&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0511593(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dispositivi Protezione Individuale - Dpi Srl, Sekur SpA filed Critical Dispositivi Protezione Individuale - Dpi Srl
Publication of EP0511593A1 publication Critical patent/EP0511593A1/de
Publication of EP0511593B1 publication Critical patent/EP0511593B1/de
Application granted granted Critical
Publication of EP0511593B2 publication Critical patent/EP0511593B2/de
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
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks

Definitions

  • the present invention relates to a panoramic protection mask for operating interventions in polluted environments.
  • protection masks are widely used in case of natural disasters, industrial accidents or any situation in which it is necessary to ensure the user's survival even when highly toxic substances - be they in the form of gases, aerosol or powders - are present in the surrounding atmosphere.
  • the most common masks essentially comprise a rubber face-piece provided with a sealing lip arranged to act in abutment on the user's face, breathing means arranged to put the inner part of the mask into communication with an air supply and a transparent screen capable of permitting the user's vision.
  • the transparent screens can have different shapes and the most important ones are flat-shaped screens, screens in the form of a cylindrical sector defined by a single bending radius, and screens in the form of a truncated conical sector defined by a series of bending radii decreasing towards the lower screen portion.
  • masks in which the transparent screen and face-piece are of one piece construction.
  • a mask of the last mentioned type being for example the object of the US Patent No. 4,069,516.
  • the mask mainly comprises an annular sealing lip arranged to act in contact relation on the user's face and carrying a transparent visual screen substantially of truncated conical form the major base edge of which is fastened to the lip whereas the minor base edge is such shaped as to be adapted to receive the breathing means as well as a possible transmitter.
  • Said mask is comprised of a visual screen provided with a perfectly transparent eye region and an opaque lower portion designed to receive the breathing means and a possible transmitter.
  • this visual screen is so shaped that the transparent eye region is located as close as possible to the user's eyes.
  • a panoramic protection mask for operating interventions in polluted environments comprising an annular sealing lip arranged to exercise a tight seal around the user's face, a transparent screen sealingly connected to said annular lip by its outer perimeter, a connecting sleeve exhibiting an inspiration opening designed to bring an air supply into communication with the inside of the mask and an expiration opening, characterized in that said transparent screen has a substantially toroidal shape defined by an arc of a circle rotating through an angle of predetermined amplitude about a substantially vertical axis of rotation, said screen extending by its upper edge as far as the top of the user's forehead while the lower edge thereof extends as far as under the user's chin, the distance of said upper edge from said axis of rotation being greater than the distance therefrom of the lower edge, so that the screen can be given a downwardly tapering shape, said screen exhibiting a middle portion designed to sealingly engage the connecting sleeve and substantially positioned in register with the user's mouth.
  • the thickness of the transparent screen is the greatest in the middle of its toroidal surface and gradually decreases towards the side portions thereof.
  • the transparent screen is in the form of an isosceles triangle in which the base side is of substantially rectilinear configuration and defines the upper edge of the screen, whereas the oblique sides have a curvilinear extension, the three sides being joined to each other by wide-radius rounded portions.
  • Said transparent screen has one hole formed in the vicinity of the upper portion of said projecting middle portion and designed to sealingly receive a transmitter.
  • said projecting middle portion has a second hole designed to be coupled to the inspiration opening of said connecting sleeve and a third hole designed to be coupled to the expiration opening of the sleeve.
  • the axes of the first, second and third holes lie in the plane of symmetry of the transparent screen.
  • connecting sleeve is sealingly and removably engaged to said transparent screen by fastening means essentially consisting of a bayonet coupling.
  • said bayonet coupling comprises a ring nut carried by the connecting sleeve coaxially with said inspiration opening and provided with at least a radially-extending engaging lug, said lug being designed to engage, through axial fitting, into a corresponding access housing formed on the perimetrical edge of said second opening and to be locked against said perimetrical edge following an angular rotation of the connecting sleeve about the axis of the inspiration opening.
  • Said ring nut in the embodiment under examination has four radially-extending engaging portions which are circumferentially distributed thereon according to angles of 90 degrees, said engaging portions being designed to engage into the second hole of said transparent screen.
  • operatively engaged in said expiration opening is a single-acting valve previously fitted in said third hole of the transparent screen from the inside thereof.
  • the single-acting valve is operatively engaged in said expiration opening through threaded means.
  • a panoramic protection mask for operating interventions in polluted environments has been generally identified by reference numeral 1.
  • the protection mask 1 has a rubber annular lip 2 designed to act by contact on the user's face 3 due to a pulling action exerted thereon by a sling 2a provided around the user's head.
  • a transparent screen 4 of toroidal form defined by an arc of a circle rotating according to an angle of predetermined amplitude about a substantially vertical axis of rotation 10 (Figs, 1 and 2).
  • the transparent screen 4 thereof has its axis of rotation 10 inclined by an angle ⁇ the value of which is included between 5 degrees on and 25 degrees back relative to a vertical direction V.
  • said axis of rotation 10 appears to be in a rear position relative to the user's eyes by a value (e) ranging between 20 and 40 millimetres.
  • the screen 4 has an upper edge 4a located close to the top of the user's forehead and a lower edge 4b extending as far as under the user's chin.
  • the transparent screen shown in section according to a vertical plane of symmetry is in the form of an arc of a circle the bending radius (R) of which is included between 100 and 200 millimetres.
  • the centre (C) of the arc of the circle is disposed under the user's eyes by an amount (h) equal to or greater than 0 and smaller than 50 millimetres.
  • the toroidal transparent screen 4 is generated by the rotation of said circular segment about the axis of rotation 10 through an angle of rotation ⁇ ranging between 160 and 200 degrees.
  • the screen 4 has its maximum bending radius (r) defined in a plane perpendicular to said axis of rotation 10 having a value included between 75 and 108 millimetres (Fig. 2).
  • the distance (c) existing between the upper edge 4a and the screen 4 section having the maximum bending radius (r) is included between 0 and 80 millimetres.
  • the ratio between the bending radius (R) of said circular segment and the maximum bending radius (r) of the toroidal surface is greater than 1 and smaller than 2.5.
  • the bending radius (a) of the upper edge 4a and the bending radius (b) of the lower edge 4b of the screen 4 as defined in the respective planes perpendicular to said axis of rotation 10 are included between 60 and 120 millimetres and 0 and 30 millimetres respectively.
  • the height (d) of the screen 4 is defined by the distance existing between the upper 4a and lower 4b edges thereof and is greater than 130 millimetres and smaller than 220 millimetres.
  • the transparent screen 4 has a downwardly tapering front configuration.
  • said screen 4 seen in front view has the shape of an isosceles triangle in which the base side is substantially rectilinear and defines the upper edge 4a, whereas the oblique sides have a curvilinear extension, the three sides being joined to each other by wide-radius rounded portions.
  • the thickness of said transparent screen 4 is the greatest (S') in the middle of the toroidal surface for the whole transversal section with a value of 3,3 mm and decreases (S") towards the side portions thereof to value of 2,2 mm, with tolerances of the cited values of ⁇ 0,7 mm.
  • a middle portion 4c of the screen 4 projects outwardly therefrom and is substantially positioned in register with the user's mouth.
  • the ratio between the overall surface of the transparent screen 4 and the surface of said screen taken up by said projecting middle portion 4c varies between 4 and 8.
  • said transparent screen 4 is provided with one hole 9a formed in the vicinity of the upper portion of said middle projecting region 4c and arranged to sealingly receive a transmitter 9.
  • middle portion 4c is arranged to sealingly engage a connecting sleeve 5 provided with an inspiration opening 5b designed to communicate the inside of the mask with an air supply, and an expiration opening 5a.
  • the projecting middle portion 4c is provided with a second hole 4d fitted for connection with the inspiration opening 5b of the connecting sleeve 5 and a third hole 4e fitted for connection with the expiration opening 5a of said connecting sleeve.
  • connecting sleeve 5 is removably and sealingly engaged with said second 4d and third 4e holes of the screen 4 by fastening means 11 consisting of a bayonet coupling.
  • the bayonet coupling comprises a ring nut 12 carried by the connecting sleeve 5 coaxially with said inspiration opening 5b and provided with at least a radially-extending engaging lug defining an undercut, said lug 12a being adapted to engage through axial fitting into a corresponding access housing 12b formed on the perimetrical edge of said second opening 4d and to become locked against said perimetrical edge following an angular rotation of the connecting sleeve 5 about the axis of the inspiration opening 5b.
  • the ring nut 12 belonging to the bayonet coupling 11 is provided with four engaging portions 12a distributed circumferentially thereabout according to angles of 90 degrees.
  • the configuration of the bayonet coupling is such that the ring nut 12 and the four portions 12a can be engaged in the second hole 4d the shape of which matches that of the above pieces.
  • the mating shape of said hole is axially rotated through an angle of about 45 degrees.
  • a filtering element 13 is clamped to the inspiration opening 5b of the connecting sleeve 5 so that the air inspired by the user from the surrounding atmosphere does not cause damages to his respiratory system.
  • a half-mask 6 At the inside of mask 1 sealingly engaged to the expiration opening 5a is a half-mask 6.
  • the half-mask 6 has an end edge 6a designed to exert a sealing action around the user (3)'s nose and mouth.
  • At least a check valve 7 is associated with the half-mask 6 and it enables the air transfer from the inside of mask 1 to the inside of the half-mask 6.
  • a single-acting valve 8 Associated with the expiration opening 5a is a single-acting valve 8 arranged to enable the air expired by the user 3 to issue from the inside of the half-mask 6.
  • the single-acting valve 8 is screwed to the expiration opening of the connecting sleeve 5 from the inside of the transparent screen 4 upon interposition of a spring seal ring 5d.
  • the axes of the first hole 9a, second hole 4d and third hole 4e belong to the plane of symmetry of the transparent screen 4 in such a way that the mounting of the connecting sleeve 5, filter 13 and transmitter 9 do not restrain the width of the user's visual field as permitted by the transparent screen 4.
  • the protection mask of the invention completely eliminates all distortion phenomena present in the masks of the known art.
  • the choice of a bending corresponding to the toroidal form enables the accomplishment of a screen capable of making the visual line of the user's eyes always cross the screen surface in a substantially perpendicular direction so as to minimize said distortions mainly due to optical refraction.
  • the extension of the toroidal surface of the screen over the user's whole face not only ensures an excellent image quality of the surrounding environment but also allows the user to take advantage of the greatest possible visual field.
  • the fact that the upper edge of the screen is spaced apart from the axis a greater distance than the lower edge, particularly in accordance with the cited values, ensures a downwardly tapering outline of the screen adapted to follow the configuration of the user's face with great accuracy, the use of elastic material corresponding to the seal ring being almost the same over the whole screen contour, which involves a sealing pressure on the user's face of substantially uniform value.
  • the downwardly tapering configuration of the toroidal screen enables the latter to follow the conformation of the human face so that face-pieces having a very reduced mass and even of one piece construction can be moulded.
  • the different components of the mask in question such as the screen, face-piece, connecting sleeve and others can be manufactured using very automatized moulding processes and their final assembling is quick and easy.
  • connecting sleeves and/or filtering elements can be used.
  • the connecting sleeve 11 used gives the mask 1 an operating typology currently known as "under vacuum".
  • under vacuum the air is taken from the surrounding atmosphere through the filter 13 by effect of the vacuum produced within the mask following the user's inspiratory action.
  • the single-acting outlet valve 8 will consist for example of a mere diaphragm adapted to be held against an appropriate seat to enable the air entry through the outlet opening 5a during the inspiratory movement, and move away from said seat to enable the air outflow during the expiratory step.
  • connecting sleeve can for example be arranged so as to enable the mask to operate in "overpressure" condition.
  • a delivery duct is engaged to the inlet opening 5b from which the breathable air infed from an outer source comes, under a condition of positive pressure.
  • a delivery valve can be associated, in known manner, with this duct, which valve is designed to open the air passage towards the mask inside, when pressure in the mask goes under a predetermined value.
  • the expiration valve is in turn provided, still in known manner, with a moving element, adjusted by a spring so as to enable the air outflow to the surrounding atmosphere when pressure within the mask exceeds the intended value.
  • the connecting sleeve can also be arranged so that the mask may be used with an oxygen closed-circuit breathing apparatus.
  • the expiration opening 5a will be closed to the surrounding atmosphere and connected to the inspiration opening 5b without any single-acting valve being interposed.
  • a connecting duct associated with a conventional oxygen breathing apparatus will be fitted in the inspiration opening 5b.
  • the connecting threads or other connecting means provided on the different connecting sleeves can be made different from one another so as to prevent a wrong coupling, for example that an air supply system may be coupled to a connecting sleeve designed to be adopted in a supply system of another type.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP92106984A 1991-04-30 1992-04-23 Vollsichtschutzmaske für Intervenienzarbeiten in verschmutzten Umgebungen Expired - Lifetime EP0511593B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI911171 1991-04-30
ITMI911171A IT1248373B (it) 1991-04-30 1991-04-30 Maschera protettiva panoramica per interventi operativi in ambienti contaminati

Publications (3)

Publication Number Publication Date
EP0511593A1 true EP0511593A1 (de) 1992-11-04
EP0511593B1 EP0511593B1 (de) 1996-10-16
EP0511593B2 EP0511593B2 (de) 2000-04-05

Family

ID=11359800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106984A Expired - Lifetime EP0511593B2 (de) 1991-04-30 1992-04-23 Vollsichtschutzmaske für Intervenienzarbeiten in verschmutzten Umgebungen

Country Status (3)

Country Link
EP (1) EP0511593B2 (de)
DE (1) DE69214502D1 (de)
IT (1) IT1248373B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0600258A1 (de) * 1992-12-03 1994-06-08 Drägerwerk Aktiengesellschaft Atemschutzmaske mit festem Maskenkörper
FR2740689A1 (fr) * 1995-11-03 1997-05-09 Comasec International Oculaire destine a un masque de protection respiratoire, masque pourvu de l'oculaire et casque et scaphandre pourvu du masque
WO1998013103A1 (en) * 1996-09-24 1998-04-02 Minnesota Mining And Manufacturing Company Full face respirator mask having integral connectors disposed in lens area
WO2002092170A3 (en) * 2001-05-11 2003-03-06 Mine Safety Appliances Co Respirator facepieces
EP2988834A1 (de) * 2013-04-25 2016-03-02 Airboss Engineered Products Inc. Atemschutzmaske für cbrn oder anderen schutz
IT201700051148A1 (it) * 2017-05-11 2018-11-11 Dimar S R L Maschera facciale per la ventilazione meccanica non invasiva a basso valore di rebreathing di CO2.
KR20210031440A (ko) * 2019-03-06 2021-03-19 주식회사 오토스윙 보안 구조체

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686795B1 (fr) * 1992-01-30 1996-07-05 Intertechnique Sa Equipement individuel respiratoire et de protection en ambiance contaminee.
ITPS20010028A1 (it) 2001-11-15 2003-05-15 Cl Com Advanced Tecnology Srl Maschera intera filtrante per la protezione degli agenti biologici

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540442A (en) * 1967-08-10 1970-11-17 Automatic Sprinkler Corp Face mask microphone mounting
US3545436A (en) * 1967-07-21 1970-12-08 Automatic Sprinkler Corp Face seal
US4296746A (en) * 1979-12-18 1981-10-27 Surgikos Disposable full-face surgical mask
US4595003A (en) * 1983-10-21 1986-06-17 The United States Of America As Represented By The Secretary Of The Army Protective mask for airborne toxic substances

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545436A (en) * 1967-07-21 1970-12-08 Automatic Sprinkler Corp Face seal
US3540442A (en) * 1967-08-10 1970-11-17 Automatic Sprinkler Corp Face mask microphone mounting
US4296746A (en) * 1979-12-18 1981-10-27 Surgikos Disposable full-face surgical mask
US4595003A (en) * 1983-10-21 1986-06-17 The United States Of America As Represented By The Secretary Of The Army Protective mask for airborne toxic substances

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0600258A1 (de) * 1992-12-03 1994-06-08 Drägerwerk Aktiengesellschaft Atemschutzmaske mit festem Maskenkörper
FR2740689A1 (fr) * 1995-11-03 1997-05-09 Comasec International Oculaire destine a un masque de protection respiratoire, masque pourvu de l'oculaire et casque et scaphandre pourvu du masque
EP0776680A1 (de) 1995-11-03 1997-06-04 Comasec International Gesichtsschutzstück für Atemschutzmaske und dazugehörige Maske, Helm und Tauscherlunge
WO1998013103A1 (en) * 1996-09-24 1998-04-02 Minnesota Mining And Manufacturing Company Full face respirator mask having integral connectors disposed in lens area
US5924420A (en) * 1996-09-24 1999-07-20 Minnesota Mining And Manufacturing Company Full face respirator mask having integral connectors disposed in lens area
WO2002092170A3 (en) * 2001-05-11 2003-03-06 Mine Safety Appliances Co Respirator facepieces
EP2988834A1 (de) * 2013-04-25 2016-03-02 Airboss Engineered Products Inc. Atemschutzmaske für cbrn oder anderen schutz
EP2988834A4 (de) * 2013-04-25 2017-07-12 Airboss Engineered Products Inc. Atemschutzmaske für cbrn oder anderen schutz
IT201700051148A1 (it) * 2017-05-11 2018-11-11 Dimar S R L Maschera facciale per la ventilazione meccanica non invasiva a basso valore di rebreathing di CO2.
WO2018207127A1 (en) * 2017-05-11 2018-11-15 Dimar S.R.L. Face mask for non-invasive mechanical ventilation with low value of co2 rebreathing
US11565065B2 (en) 2017-05-11 2023-01-31 Dimar S.R.L. Face mask for non-invasive mechanical ventilation with low value of CO2 rebreathing
KR20210031440A (ko) * 2019-03-06 2021-03-19 주식회사 오토스윙 보안 구조체

Also Published As

Publication number Publication date
ITMI911171A1 (it) 1992-10-30
EP0511593B1 (de) 1996-10-16
EP0511593B2 (de) 2000-04-05
IT1248373B (it) 1995-01-11
DE69214502D1 (de) 1996-11-21
ITMI911171A0 (it) 1991-04-30

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