EP0613699A1 - Joint d'étanchéité pour masque respiratoire - Google Patents

Joint d'étanchéité pour masque respiratoire Download PDF

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Publication number
EP0613699A1
EP0613699A1 EP94301473A EP94301473A EP0613699A1 EP 0613699 A1 EP0613699 A1 EP 0613699A1 EP 94301473 A EP94301473 A EP 94301473A EP 94301473 A EP94301473 A EP 94301473A EP 0613699 A1 EP0613699 A1 EP 0613699A1
Authority
EP
European Patent Office
Prior art keywords
seal
mask
wearer
respiratory mask
respiratory
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Withdrawn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
EP94301473A
Other languages
German (de)
English (en)
Inventor
Michael Beard
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 EP0613699A1 publication Critical patent/EP0613699A1/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Withdrawn legal-status Critical Current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
    • 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
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices

Definitions

  • This invention relates to seals and is, particularly but not exclusively, concerned with seals for respiratory masks, in particular those for close sealing conformity with the face or visage contours of the human form.
  • the masks provide a controlled respiratory or breathing environment adjacent the oral and nasal respiratory tracts and organs - and one admitting respiratory gases at a required composition, pressure and flow rate.
  • seal performance is crucial to overall mask performance.
  • respiratory masks for aviation use are subject to a differential pressure, which may in certain (extreme) circumstances undermine the mechanical seal action and thus the overall dynamic sealing effectiveness.
  • the ambient pressure is low and this is reflected in a prevailing cockpit pressure in a non-pressurised aircraft.
  • the atmosphere is also characteristically 'thin' - ie of low density - and thus a supplementary respiratory supply must be provided to maintain normal pilot breathing.
  • a supplementary supply is typically regulated by a control valve and available on-demand through an alternate inspiratory/expiratory-exhalation valve arrangement.
  • accelerative or so-called 'g-loads' may increase the effective weight of the mask by several times (say 2/3 to 8/9 g).
  • the mask is of not insignificant mass and bulk and thus inertia and so tends to reflect such 'g' loads in a perceptible manner, both in terms of seal contact performance and user comfort.
  • the mask and attendant peripheral face seal may tend to move away from the wearer's face contours. This undermines the seal contact load and overall seal efficacy.
  • the mask may press uncomfortably tight against the face contours.
  • the seal profile itself (particularly with a turned over or rolled edge seal) may distort and no longer provide the resilient deformability for intimate face contour contact.
  • the mask For general mounting support - and to deal with such diverse 'g' loadings and ambient pressure variations, typically the mask is entrained by fairly simple opposed tension straps tethered at each side of the wearer's head, for example to a helmet.
  • Pre-tensioning may also be deployed in anticipation of high altitude, high pressure differential conditions.
  • a respiratory (aviation) face mask 20 comprises a lightweight, rigid or semi-rigid shell 21 covering or embracing both the nose region 31 and mouth region 32 of a wearer's face 30 - as the inlet and outlet orifices of the external respiratory organs.
  • a resiliently deformable seal 22 (shown in more detail in Figure 2), typically of rubber or synthetic rubber composite.
  • the seal 22 is configured to achieve intimate sealing contact with the wearer's individual (and variable/movable) face contours around the external respiratory organs of the nose 31 and mouth 32 - from the (relatively hard, bony) nose bridge, around the (relatively soft/compliant fleshy tissue) cheeks to the (relatively hard, bony) chin.
  • the mask shell 21 thus defines a shallow respiratory breathing chamber 29, closely or tightly defined around the nose 31 and mouth 32 - and to which there may be admitted a prescribed breathing atmosphere, thereby creating a controlled breathing environment.
  • the mask 20 is mounted upon opposed restraining straps 25 at each side of the wearer's head, typically secured to an aviation helmet (not shown) or alternatively in a closed loop around the wearer's head.
  • the straps 25 incorporate length and thus pre-tensioning adjustment buckles 26.
  • a breathing tube 27 connected to a flexible supply tube 28, typically of corrugated profile to inhibit collapse whilst allowing extension, contraction and bending, and in turn in communication with a pressurised supplementary supply of respiratory gas, such as neat oxygen, for controlled admixture to the mask under regulatory intake and exhalation valves, not shown.
  • a pressurised supplementary supply of respiratory gas such as neat oxygen
  • the seal 22 is of generally triangular profile in plan and incorporates a sprung stiffening element 23 to improve seal (contour contact) performance.
  • the seal 22 need only extend at and around the periphery of the mask shell 21, leaving a free chamber 29.
  • the stiffening element 23 has an intricate serrated or multiple toothed (internal) edge profile 24 and is fabricated - for example by stamping from strip or sheet material or even chemical etching from a thin metal foil - with modest inherent spring characteristics.
  • the stiffener teeth 24 impart a selective localised reinforcement or bracing to the seal (contour contact) action of the resiliently-deformable rubber seal body or substrate 22.
  • the marginal 'interstitial' strips 38 of seal substrate located in between the individual fingers 24 can flow over (intricate or complex-curved) local surface contact contours - ie they can flex in a somewhat less constrained manner to preserve seal contact than those areas directly underlying fingers.
  • the 'fingered' areas impart a spring-biassed or pre-loaded contact base closely adjacent the inter-finger regions 38, thus constraining their freedom of movement somewhat and inhibiting them from flexing entirely out of sealing (contour) contact.
  • the individual tooth profiles may vary around the periphery of the seal stiffener 23, for example shorter/more slender fingers 36 around the less compliant/variable nose (upper bridge) contours and longer/broader fingers 35 towards the cheeks and at the lower chin periphery.
  • the individual finger size and profile and the relative disposition of fingers 36 may vary to meet individual mask requirements. Thus, for example, in some variants a lesser number of fingers may be deployed than that illustrated.
  • the fingers 24 are effectively mounted upon - and so constrained by - a common outer peripheral base edge 34, which in this case is of the same/integrated material, but could be a differential mass of other material, such as local thickening of the rubber substrate.
  • the initial contact between the circumferential rubber seal 22 is promoted and reinforced or braced, locally and collectively, by the spring action of the fingers 24 and their bending about the base rim 34.
  • the seal stiffener 23 may be embedded within or applied to one or both sides of the seal 22.
  • seal stiffeners 23 may be incorporated in different areas to meet the particular conditions locally - for example at the semi-rigid nose bridge and chin on the one hand and the relatively soft cheek areas on the other hand.
  • Such performance enhancement is available in not only static - ie constant pressure or 'g' loading - but also under dynamic - ie (continuously) variable pressure and 'g' loadings.
  • the improved seal performance sophistication without increasing the mask and mounting complexity, enables a relatively light-weight, yet stiff and resilient structure, for example a glass or carbon fibre reinforced plastics, to be employed for the mask shell 21.

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)
EP94301473A 1993-03-03 1994-03-02 Joint d'étanchéité pour masque respiratoire Withdrawn EP0613699A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9304347 1993-03-03
GB9304347A GB2275614A (en) 1993-03-03 1993-03-03 Seal for respiratory mask

Publications (1)

Publication Number Publication Date
EP0613699A1 true EP0613699A1 (fr) 1994-09-07

Family

ID=10731405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94301473A Withdrawn EP0613699A1 (fr) 1993-03-03 1994-03-02 Joint d'étanchéité pour masque respiratoire

Country Status (2)

Country Link
EP (1) EP0613699A1 (fr)
GB (1) GB2275614A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996040370A1 (fr) * 1995-06-07 1996-12-19 Mine Safety Appliances Company Masque a gaz avec des elements de rigidification
GB2408459A (en) * 2003-11-25 2005-06-01 Joseph Anthony Griffiths High G breathing mask with enhanced seal
JP2013523246A (ja) * 2010-03-31 2013-06-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ リブ付の患者接触面を有する患者インタフェース装置
US8820326B2 (en) 2007-08-31 2014-09-02 3M Innovative Properties Company Respirator facepiece with thermoset elastomeric face seal
US8839788B2 (en) 2007-08-31 2014-09-23 3M Innovative Properties Company Respirator attachment component with molded thermoset elastomeric seal
CN106617393A (zh) * 2017-01-10 2017-05-10 东莞市利发爱尔空气净化系统有限公司 一种口罩
US10065056B2 (en) 2007-08-31 2018-09-04 3M Innovative Properties Company Unitary respirator with molded thermoset elastomeric elements
US20200197645A1 (en) * 2018-12-21 2020-06-25 Koninklijke Philips N.V. Cushion member having a pre-stressed element and method of manufacture
CN113615907A (zh) * 2020-05-09 2021-11-09 清锋（北京）科技有限公司 一种新型3d打印口罩
WO2022078212A1 (fr) * 2020-10-17 2022-04-21 北京仰生恒泰科技有限责任公司 Masque de protection respiratoire à étanchéité dynamique
CN114515372A (zh) * 2020-11-20 2022-05-20 陈惠美 可调整气密效果的呼吸面罩

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19807961C2 (de) * 1998-02-25 1999-12-02 Map Gmbh Beatmungsmaske
GB2393126B (en) 2002-09-18 2004-11-03 Joseph Anthony Griffiths High G oxygen mask for aircrew
WO2004071565A1 (fr) * 2003-02-12 2004-08-26 Fisher & Paykel Healthcare Limited Interface pour patient
US9776023B2 (en) * 2013-09-24 2017-10-03 3M Innovative Properties Company Respiratory mask having a nose support extension

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR776057A (fr) * 1933-07-22 1935-01-16 Masque à gaz
US4907584A (en) * 1988-03-03 1990-03-13 Mcginnis Gerald E Respiratory mask
GB2260084A (en) * 1991-10-03 1993-04-07 Intertechnique Sa Breathing equipment having a face mask
GB2267647A (en) * 1992-06-12 1993-12-15 Mel A face piece for a face mask

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB447729A (en) * 1935-07-10 1936-05-25 Hungarian Rubber Goods Factory Improvements in or relating to gas masks
GB837250A (en) * 1957-04-29 1960-06-09 Bendix Aviat Corp Respiratory masks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR776057A (fr) * 1933-07-22 1935-01-16 Masque à gaz
US4907584A (en) * 1988-03-03 1990-03-13 Mcginnis Gerald E Respiratory mask
GB2260084A (en) * 1991-10-03 1993-04-07 Intertechnique Sa Breathing equipment having a face mask
GB2267647A (en) * 1992-06-12 1993-12-15 Mel A face piece for a face mask

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996040370A1 (fr) * 1995-06-07 1996-12-19 Mine Safety Appliances Company Masque a gaz avec des elements de rigidification
GB2408459A (en) * 2003-11-25 2005-06-01 Joseph Anthony Griffiths High G breathing mask with enhanced seal
US10065056B2 (en) 2007-08-31 2018-09-04 3M Innovative Properties Company Unitary respirator with molded thermoset elastomeric elements
US8820326B2 (en) 2007-08-31 2014-09-02 3M Innovative Properties Company Respirator facepiece with thermoset elastomeric face seal
US8839788B2 (en) 2007-08-31 2014-09-23 3M Innovative Properties Company Respirator attachment component with molded thermoset elastomeric seal
US11701528B2 (en) 2007-08-31 2023-07-18 3M Innovative Properties Company Unitary respirator with molded thermoset elastomeric elements
US12070633B2 (en) 2007-08-31 2024-08-27 3M Innovative Properties Company Unitary respirator with molded thermoset elastomeric elements
JP2013523246A (ja) * 2010-03-31 2013-06-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ リブ付の患者接触面を有する患者インタフェース装置
CN106617393A (zh) * 2017-01-10 2017-05-10 东莞市利发爱尔空气净化系统有限公司 一种口罩
US20200197645A1 (en) * 2018-12-21 2020-06-25 Koninklijke Philips N.V. Cushion member having a pre-stressed element and method of manufacture
CN113615907A (zh) * 2020-05-09 2021-11-09 清锋（北京）科技有限公司 一种新型3d打印口罩
CN113615907B (zh) * 2020-05-09 2023-09-05 清锋（北京）科技有限公司 一种新型3d打印口罩
WO2022078212A1 (fr) * 2020-10-17 2022-04-21 北京仰生恒泰科技有限责任公司 Masque de protection respiratoire à étanchéité dynamique
CN114515372A (zh) * 2020-11-20 2022-05-20 陈惠美 可调整气密效果的呼吸面罩

Also Published As

Publication number Publication date
GB2275614A (en) 1994-09-07
GB9304347D0 (en) 1993-04-21

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