EP0511592A1 - Masque de protection avec manchon interchangeable de connection pour utilisation lors d'inteventions opérationnelles dans des milieux contaminés - Google Patents

Masque de protection avec manchon interchangeable de connection pour utilisation lors d'inteventions opérationnelles dans des milieux contaminés Download PDF

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Publication number
EP0511592A1
EP0511592A1 EP19920106983 EP92106983A EP0511592A1 EP 0511592 A1 EP0511592 A1 EP 0511592A1 EP 19920106983 EP19920106983 EP 19920106983 EP 92106983 A EP92106983 A EP 92106983A EP 0511592 A1 EP0511592 A1 EP 0511592A1
Authority
EP
European Patent Office
Prior art keywords
opening
connecting sleeve
expiration
mask
main body
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.)
Withdrawn
Application number
EP19920106983
Other languages
German (de)
English (en)
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
Application filed by Dispositivi Protezione Individuale - Dpi Srl, Sekur SpA filed Critical Dispositivi Protezione Individuale - Dpi Srl
Publication of EP0511592A1 publication Critical patent/EP0511592A1/fr
Withdrawn legal-status Critical Current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
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/04—Couplings; Supporting frames

Definitions

  • the present invention relates to an interchangeable connecting sleeve for protection masks used 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 environment.
  • 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, a transparent screen capable of permitting the user's vision, as well as a connecting sleeve associated with said face-piece and provided with an inspiration opening connected to an air supply, and an expiration opening to enable the expired air to be ejected.
  • the operating principle is fundamentally based on the requirement of air from the surrounding atmosphere carried out by the inspiratory vacuum produced by the user within the mask.
  • a filter is generally provided which is associated with the inspiration opening of the connecting sleeve and arranged to carry out the elimination of powders and/or gases from the air inspired by the mask's user.
  • a duct is provided which connects the inspiration opening to an apparatus capable of supplying air on request having substantially the same pressure as the ambient one.
  • the air expired by the user is ejected from the expiration opening through a single-acting diaphragm valve offering a very weak resistance to the passage of air.
  • each of the overpressure masks is a breathing apparatus capable of delivering air to a predetermined pressure.
  • said breathing apparatus is connected through a duct to the connecting sleeve inspiration opening.
  • This duct is arranged so as to send air from the breathing apparatus to the mask as far as the inner mask pressure is substantially the same as the predetermined pressure of the air delivered from the breathing apparatus.
  • the expiration creates an increase in pressure within the mask which will bring about the immediate opening of a single-acting valve associated with the expiration opening.
  • This valve is set so that it only opens when pressure in the mask exceeds the pressure value to which air is supplied by the breathing apparatus.
  • said breathing apparatus by virtue of a cleaner cartridge and a plenum chamber, lends itself to carry out the filtering of the air expired by the user and enrich it with oxygen so that it can be continuously used by the same.
  • a type of mask in which two single-operating expiration valves are present.
  • One of the valves, arranged to operate when the mask is used at the atmospheric pressure, is mounted coaxially with the inspiration opening, whereas a second valve, set for operating under overpressure conditions, is disposed laterally on the mask face-piece.
  • the air expired by the user issues through the first expiration valve.
  • the duct issuing from an overpressure breathing apparatus is connected to the inspiration opening, the passage of the expired air through the first valve is inhibited so that the air is forced to issue through the second valve.
  • the duct connected to the inspiration opening is so shaped that it closes the outlet ports of the first valve.
  • Another solution to increase the versatility of use in the protection mask field envisages an expiration valve positioned under the inspiration opening, which valve is normally adapted to operate under ambient pressure conditions.
  • the duct for connection to the overpressure breathing apparatus has a bulge at one end thereof which is provided with spring devices that when the duct is fitted on the inspiration opening act on the diaphragm of the expiration valve setting the valve to operation under overpressure conditions.
  • the invention relates to an interchangeable connecting sleeve for protection masks used for operating interventions in polluted environments, of the type comprising an inspiration opening and an expiration opening disposed in mutual side by side relation and communicating with the inside of the protection mask; said connecting sleeve being characterized in that it consists of three distinct parts, said first part comprising:
  • said fastening means comprises a bayonet coupling consisting of a ring nut carried by the main body coaxially with said inspiration opening and provided with at least a radially-extending engaging lug defining an undercut, said lug being designed to engage by axial fitting into a corresponding access housing formed on the circumferential edge of said first hole of the anchoring portion and to be locked against said circumferential edge as a result of an angular rotation of the main body about the axis of the inspiration opening.
  • a bayonet coupling consisting of a ring nut carried by the main body coaxially with said inspiration opening and provided with at least a radially-extending engaging lug defining an undercut, said lug being designed to engage by axial fitting into a corresponding access housing formed on the circumferential edge of said first hole of the anchoring portion and to be locked against said circumferential edge as a result of an angular rotation of the main body about the axis of the inspiration opening.
  • the detachable locking means comprises an externally threaded bush designed to be screwed into the expiration opening through the second hole of said anchoring portion, the expiration means being integrated in said bush.
  • an interchangeable connecting sleeve for protection masks to be used for operating interventions in polluted environments has been generally identified by reference numeral 1.
  • the connecting sleeve 1 is associated with a protection mask 2 comprising a transparent screen 3 extending over the user's face and circumferentially connected to an annular lip 3a of elastomeric material designed to exercise a tight seal around the user's face.
  • the connecting sleeve is comprised of a main body 4 exhibiting an inspiration opening 5 and an expiration opening 6 disposed mutually in side by side relation.
  • first engaging means 7 Disposed within the inspiration opening 5 is first engaging means 7 designed to engage air supply means 8 close to and in communication with the inspiration opening, as better specified in the following.
  • the expiration opening 6 is adapted to receive and be coupled to expiration means 9 more clearly described in the following, which is adapted to control the ejection from the mask 2 of the air expired by the user.
  • the main body 4 can be detachably engaged to an anchoring portion 10 rigidly carried by the mask 2 and exhibiting one through hole 11 and a second through hole 12 disposed coaxially with the inspiration opening 5 and the expiration opening 6 formed in the main body 4 of the connecting sleeve 1.
  • fastening means 13 preferably consisting of a bayonet coupling 13.
  • the bayonet coupling 13 is comprised of a ring nut 14 provided on the main body 4 coaxially with the inspiration opening 5 and having at least one radially-extending engaging lug 14a defining an undercut.
  • the engaging lugs 14a are four in number and are circumferentially distributed about the ring nut 14 being spaced apart through angles of 90°.
  • the engaging lugs 14a are designed to engage into corresponding access housings 11a formed on the circumferential edge of said first hole 11 of the anchoring portion 10 and circumferentially distributed on said edge being spaced apart through angles of 90°.
  • the necessary tightness between the inspiration opening 5 and the first through hole 11 is achieved by one ring of elastomeric material 15.
  • the connecting sleeve 1 further comprises removable locking means 16 for fastening the expiration means 9 to the expiration opening 6 via the second through hole 12 of the anchoring portion 10 and lock the main body 4 to the anchoring portion at said second through hole.
  • Said removable locking means preferably consists of a threaded bush 17 to be screwed down in the expiration opening 6 from the inside of the mask 2.
  • a second ring of elastomeric material 18 ensures the tight seal between the circumferential edge of the second through hole 12 and a circumferential projection 19 exhibited by the threaded bush 17.
  • different main bodies are provided to be supplied as equipment for one and the same mask 2, which bodies are adapted to be individually and selectively engaged to the anchoring portion 10 in combination with specific air supply means 8 and expiration means 9, so as to adapt the mask to the different operating typologies.
  • the connecting sleeve 1 is arranged to adapt the mask 2 to an ambient-pressure operation.
  • the first engaging means 7 consists of a thread 7a adapted to engage a filtering element 8a forming the air supply means 8.
  • the expiration means 9 consists of a mere single-acting diaphragm valve, not shown as known per se and conventional, integrated in the threaded bush 16 and arranged to offer a weak resistance to the air outflow expired from the inside of the mask 2.
  • Fig. 5 Shown in Fig. 5 is the main body 4, the air supply means 8 and expiration means 9 that must be associated with the mask 2 when the latter is to operate under overpressure conditions.
  • the first engaging means 7 is made of a thread 7b different from thread 7a in Fig. 1 and suitable for engagement with a duct 8b leading off to a conventional breathing apparatus supplying air to a predetermined pressure.
  • the expiration means 9 is in turn comprised of a single-acting valve 20 such set that it enables the air expired by the user to reach the expiration opening 6 only when the pressure value of the expired air exceeds said predetermined pressure value.
  • said valve 20 consists of a dish 21 elastically pressed by a spring 22 against the circumferential edge 23 of an outflow port 24 for the expired air.
  • Fig. 6 Shown in Fig. 6 is the main body 4, the air supply means 8 and expiration means 9 to be used in order to arrange the mask 2 to operate as a closed-circuit-feed mask.
  • the main body 4 is designed both to send the air expired by the user to air recycling means and take therefrom the enriched air to be subsequently inspired by the user.
  • inspiration opening 5 of the main body 4 is closed by one wall 30 at the end facing the user's face and communicates through a connecting port 31 with the expiration opening 6.
  • the expiration opening 6 is in turn closed at the end opposite the one facing the user's face by a second wall 32.
  • the first engaging means 7 consists of a threaded bush 26 disposed coaxially within the inspiration opening 5 and supported therein by at least a spoke 27 integral with the main body 4.
  • the bush 26 lends itself to be operatively engaged by a threaded element 28 associated with a duct 8c connected to recycling means consisting of an oxygen breathing apparatus not shown as known per se and conventional.
  • the expiration means 9 merely consists of an outflow port 29 formed in the threaded bush 17.
  • the anchoring portion 10 of the connecting sleeve 1 is of one piece construction with the transparent screen 3 of the mask 2.
  • the transparent screen 3 extends so as to completely cover the user's face.
  • the screen 3 has a toroidal configuration defined by an arc of a circle of radius R and centre C rotating through an angle ⁇ of predetermined amplitude about a substantially vertical axis of rotation Y.
  • the screen 3 has a downwardly tapering shape substantially in the form of an isosceles triangle the base side of which is substantially rectilinear 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.
  • the connecting sleeve shown therein is conceived so that it may be associated with a mask 2 provided with a traditional rubber face-piece 33.
  • the anchoring portion 10 consists of a plate-like element 34 provided with a perimetric groove 35 in which the face-piece 33 is engaged through a clamping band 36.
  • a half-mask sealingly engaged to the threaded bush 17 and arranged to exercise a tight seal around the user's nose and mouth.
  • the half-mask 37 can be provided with one or more single-acting valves 37 enabling the air inspired by the user to enter.
  • Identified by 39 is a conventional transmitter.
  • the main body 4 of the connecting sleeve 1 lends itself to be replaced in the mask 2 in order to enable the mask to be used according to differently-operated respiratory systems while ensuring a regular operation.
  • the bush 17 after being untightened and therefore disengaged from the expiration opening 6, is withdrawn rearwardly from the second hole 12 of the anchoring portion 10.
  • the main body 4 of the connecting sleeve 1 can be angularly rotated according the the axis of the inspiration opening 5 in order to axially align the four lugs 14a with the four access housings 11a.
  • the main body thus disengaged can be removed from the mask 2 by axial disconnection of the lugs 14a from the access housings 11a.
  • the mask 2 is now ready to receive the new main body 4 depicted in Fig. 5 the association of which with the mask will enable the latter to operate in overpressure conditions.
  • a filtering element can be only and exclusively mounted to the main body in which the expiration opening is adapted to engage a single-acting diaphragm valve.
  • an overpressure breathing apparatus can be only connected to a main body designed to engage a single-acting valve set to a predetermined pressure value.
  • An oxygen-recycling breathing apparatus will be able to be associated only with a main body the expiration opening of which is connected to the inspiration opening.
  • the invention facilitates the mounting and servicing operations of the various mask components.
  • the anchoring portion of the connecting sleeve in question is of one piece construction therewith and a very wide visual field can be ensured without involving, on the other hand, phenomena of optical distorsion.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP19920106983 1991-04-30 1992-04-23 Masque de protection avec manchon interchangeable de connection pour utilisation lors d'inteventions opérationnelles dans des milieux contaminés Withdrawn EP0511592A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI911172A IT1248374B (it) 1991-04-30 1991-04-30 Bocchettone intercambiabile per maschere protettive per interventi operativi in ambienti contaminati
ITMI911172 1991-04-30

Publications (1)

Publication Number Publication Date
EP0511592A1 true EP0511592A1 (fr) 1992-11-04

Family

ID=11359801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920106983 Withdrawn EP0511592A1 (fr) 1991-04-30 1992-04-23 Masque de protection avec manchon interchangeable de connection pour utilisation lors d'inteventions opérationnelles dans des milieux contaminés

Country Status (2)

Country Link
EP (1) EP0511592A1 (fr)
IT (1) IT1248374B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0771577A1 (fr) 1995-11-03 1997-05-07 Comasec International Sa Bloc de liaison destiné à un masque respiratoire, masque, casque et scaphandre correspondant
FR2740690A1 (fr) * 1995-11-03 1997-05-09 Comasec International Bloc de liaison destine a un masque respiratoire ; masque pourvu d'un tel bloc ; casque et scaphandre comprenant un tel masque
WO1998013103A1 (fr) * 1996-09-24 1998-04-02 Minnesota Mining And Manufacturing Company Masque a gaz integral dote de connecteurs integres disposes dans un hublot
EP1110582A1 (fr) * 1999-12-23 2001-06-27 Auergesellschaft Gmbh Raccord de masque respiratoire
WO2003041801A1 (fr) 2001-11-15 2003-05-22 Cl.Com S.R.L. Systeme de filtrage assurant une protection contre les agents biologiques
GB2515847A (en) * 2013-12-04 2015-01-07 Design Reality Ltd Respirators
CN113679974A (zh) * 2021-07-29 2021-11-23 江苏海拓科技有限公司 一种抖动式自吸呼吸器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE567505C (de) * 1926-03-24 1933-01-04 Bernh Draeger Loesbare Kupplung zum Anschluss eines Filtergehaeuses fuer Atmungsgeraete
DE629801C (de) * 1932-03-25 1936-05-12 Draegerwerk Heinr U Bernh Drae Filteranschlussstueck fuer Gasschutzmasken
DE701632C (de) * 1936-01-27 1941-01-21 Fritz Rieger Filteranschlussstueck fuer Gasschutzmasken
GB1553437A (en) * 1976-09-21 1979-09-26 Dca Design Consultants Ltd Face mask and facepiece therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE567505C (de) * 1926-03-24 1933-01-04 Bernh Draeger Loesbare Kupplung zum Anschluss eines Filtergehaeuses fuer Atmungsgeraete
DE629801C (de) * 1932-03-25 1936-05-12 Draegerwerk Heinr U Bernh Drae Filteranschlussstueck fuer Gasschutzmasken
DE701632C (de) * 1936-01-27 1941-01-21 Fritz Rieger Filteranschlussstueck fuer Gasschutzmasken
GB1553437A (en) * 1976-09-21 1979-09-26 Dca Design Consultants Ltd Face mask and facepiece therefor

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0771577A1 (fr) 1995-11-03 1997-05-07 Comasec International Sa Bloc de liaison destiné à un masque respiratoire, masque, casque et scaphandre correspondant
FR2740690A1 (fr) * 1995-11-03 1997-05-09 Comasec International Bloc de liaison destine a un masque respiratoire ; masque pourvu d'un tel bloc ; casque et scaphandre comprenant un tel masque
WO1998013103A1 (fr) * 1996-09-24 1998-04-02 Minnesota Mining And Manufacturing Company Masque a gaz integral dote de connecteurs integres disposes dans un hublot
US5924420A (en) * 1996-09-24 1999-07-20 Minnesota Mining And Manufacturing Company Full face respirator mask having integral connectors disposed in lens area
DE19963598B4 (de) * 1999-12-23 2007-02-22 Auergesellschaft Gmbh Anschlussteil einer Atemschutzmaske
EP1110582A1 (fr) * 1999-12-23 2001-06-27 Auergesellschaft Gmbh Raccord de masque respiratoire
WO2003041801A1 (fr) 2001-11-15 2003-05-22 Cl.Com S.R.L. Systeme de filtrage assurant une protection contre les agents biologiques
GB2515847A (en) * 2013-12-04 2015-01-07 Design Reality Ltd Respirators
GB2515847B (en) * 2013-12-04 2015-05-27 Design Reality Ltd Respirators
US11491354B2 (en) 2013-12-04 2022-11-08 Core Protection Systems Ltd. Bayonet connectors suitable for connecting filter cartridges to respirators
US11547878B2 (en) 2013-12-04 2023-01-10 Core Protection Systems Ltd. Respirators
CN113679974A (zh) * 2021-07-29 2021-11-23 江苏海拓科技有限公司 一种抖动式自吸呼吸器
CN113679974B (zh) * 2021-07-29 2022-04-05 江苏海拓科技有限公司 一种抖动式自吸呼吸器

Also Published As

Publication number Publication date
IT1248374B (it) 1995-01-11
ITMI911172A1 (it) 1992-10-30
ITMI911172A0 (it) 1991-04-30

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