EP1647310B1 - Breathing mask with exhalation valve - Google Patents

Breathing mask with exhalation valve Download PDF

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Publication number
EP1647310B1
EP1647310B1 EP20040024666 EP04024666A EP1647310B1 EP 1647310 B1 EP1647310 B1 EP 1647310B1 EP 20040024666 EP20040024666 EP 20040024666 EP 04024666 A EP04024666 A EP 04024666A EP 1647310 B1 EP1647310 B1 EP 1647310B1
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EP
European Patent Office
Prior art keywords
breathing mask
sealing
mask according
housing
exhalation
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 - Fee Related
Application number
EP20040024666
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German (de)
French (fr)
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EP1647310A1 (en
Inventor
Heinz Wandel
Frank Kern
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Moldex Metric AG and Co KG
Original Assignee
Moldex Metric AG and Co KG
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.)
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Publication date
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Priority to EP20040024666 priority Critical patent/EP1647310B1/en
Priority to DE200450004668 priority patent/DE502004004668D1/en
Publication of EP1647310A1 publication Critical patent/EP1647310A1/en
Application granted granted Critical
Publication of EP1647310B1 publication Critical patent/EP1647310B1/en
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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
    • A62B18/10—Valves
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators
    • A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask

Definitions

  • the invention relates to a respirator of the type explained in the preamble of claim 1.
  • respirators are widely used for protection in dusty or otherwise contaminated environments. They are often provided with an exhalation valve to reduce expiratory pressure and to ensure that exhaled moist air can exit the mask without restraining too much of the exhaled air moisture through the filter material and possibly interfering with filtration.
  • exhalation valves are known in a variety of constructions.
  • FIG. 1 shows the GB-A-20 72 516 one of the generic respirators with an exhalation valve that uses a flexible sealing membrane.
  • the flexible sealing membrane is formed as a patch and either partially attached in the form of a valve flap on the circumference or formed as a ring valve, wherein the flat sealing membrane is mounted centrally and arched bowl-shaped when inflating.
  • a problem with these exhalation valves is the fact that the material of the sealing membrane becomes fatigued over time and can show cracks in the region of the fastening or the sealing membrane no longer closes tightly due to the loss of the flexible properties.
  • the US-A-4,241,756 shows an exhalation valve for use in artificial respiration devices.
  • the exhalation valve is switched on in a line and contains a sealing part with a flexible, cup-shaped sealing membrane.
  • the sealing membrane is rectilinear and planar towards the inflow side and, in one embodiment, has a trapezoidal shaped edge.
  • the trapezoidally shaped edge has a region which projects on the side of the sealing membrane opposite the inflow side.
  • This protruding edge opens into a region extending parallel to the sealing membrane, which rests on a support surface on its surface facing the inflow side.
  • the transition between the protruding portion and the parallel portion is free on the opposite side, so that both the sealing membrane and the protruding edge can move freely.
  • ventilators do not have to be worn by users, as is the case with respirators. Consequently, care must be taken not to construct as weight-saving as possible, so that the designs are not necessarily comparable.
  • a respirator with an exhalation valve which tries to solve the problems with the rigid attachment of the sealing membrane in the prior art.
  • a valve of the lip valve type is used, which manages without rigid attachment in the range of movement of the sealing membrane.
  • the well-known exhalation valve consists of a Einknöpf Scheme in one Opening a wall of the respirator, which serves as a retaining flange for a membrane formed as an inflow surface, which is connected over part of its circumference with the retaining flange and opens over the remaining part of its circumference in a kind of flattened tube forming a lip valve. All parts are made in one piece from the same flexible material so that the diaphragm and the lip valve do not have to move against a rigid support.
  • this embodiment is also still capable of improvement.
  • the invention is therefore an object of the invention to provide a respirator with a simple to produce and durable exhalation valve.
  • the inventive design a very flat, inexpensive and easy to produce exhalation valve is provided with a prolonged durability. Due to the cup-shaped design of the sealing member with the inflow to the upstream side and the supported by the opposite side edge supported on a support surface, the sealing membrane for opening and closing the exhalation valve can move freely, even without the sealing membrane clamped at any point or otherwise as recorded. Due to the curvature of the inflow surface, counter to the inflow pressure, the sealing part is placed under pretension, so that it rests firmly on the valve seat after completion of exhalation and in particular during inhalation.
  • the closing force of the sealing membrane and consequently the speed with which the sealing membrane rests on the valve seat after exhaling, is still decisively improved when the edge is elastically compressible, in particular bellows-like wavy.
  • the edge is elastically compressed during exhalation, and immediately relaxes again when the exhalation decreases.
  • it can be ensured that the edge is resiliently biased even when the exhalation valve is closed, so that the sealing membrane is additionally loaded in the direction of the valve seat.
  • a buckling protection with at least one guide surface should preferably be provided.
  • the cup-shaped sealing part In order to prevent a displacement of the sealing part during use, the cup-shaped sealing part should be fixed in position, in particular centered over its edge.
  • a deflection restriction for limiting the movement of the sealing membrane during inhalation and / or exhalation should be expediently provided be.
  • housing parts of the exhalation valve include a fastening device for fastening the housing parts to one another and to the respiratory mask, the fastening device preferably having a detent direction for connecting the housing parts and clamping surfaces for clamping a region of the respiratory mask ,
  • the respirator is preferably sealed to ensure secure attachment to the respirator and to prevent the seal from shifting inadvertently.
  • Fig. 1 shows a schematic perspective view of an embodiment of a respirator 1 according to the invention, which may be of any conventional type.
  • the respirator 1 includes a mask body 2 that is configured to cover the user's mouth and nose and sealingly engage the cheeks, over the bridge of the nose and under the user's chin, against the wearer's face. Masks of this type are also referred to as half masks or face masks.
  • the respirator 1 includes a mask body 2, which is molded or deep drawn from a filtering wall, wherein the mask body 2 has a certain dimensional stiffness, ie not collapsing or collapsing during inhalation and not exhale from its sealing seat on the face of the Carrier lifts.
  • the mask body 2 may be made in a conventional manner and with known materials.
  • the respirator 1 is attached by means of a headband 3 at the head of the wearer in the usual way.
  • the headband 3 is fixed by means of tabs 4 on the mask body 2, a Make tunnel for a length adjustment of the harness 3.
  • the headband 3 can also be firmly connected to the mask body 2.
  • the respirator 1 is further provided with an exhalation valve 5, which is arranged in an opening 2 a in the mask body 2.
  • the exhalation valve 5 is arranged at a location of the mask body 2, which is preferably acted upon directly by the flow, which generates the carrier during exhalation.
  • the exhalation valve 5 includes a housing 6, which is formed as a flat, lenticular capsule with a central axis 6 'and encloses a sealing part 7 in its interior.
  • the seal member 7 includes a circular seal diaphragm 7a and a peripheral edge 7b projecting from the seal diaphragm 7a and extending around the entire circumference of the seal diaphragm 7a; i.e. the sealing member 7 is formed substantially cup-shaped, wherein the sealing membrane 7a forms the bottom and the protruding edge 7b, the side wall.
  • the sealing membrane 7a is arched on the side opposite the edge 7b.
  • the sealing part 7 with the sealing membrane 7a and the edge 7b is preferably formed in one piece and consists of a flexible material, such as a plastic or a rubber, as it has also been used for sealing membranes of exhalation valves.
  • the edge 7b is formed such that it is elastically compressible along its longitudinal extent between its free end and the sealing membrane 7a. This is made possible in the illustrated embodiment in that the edge 7b is corrugated bellows. These bellows-like corrugations can already be preformed during the production of the sealing part 7 or can only result in the assembly state described below. It is also possible to specify the desired locations of a corrugation on the edge 7b in the form of indentations or the like, in order to ensure that the edge 7b curls in the desired manner when it is pressed against its free end in the direction of the sealing membrane 7a is charged.
  • the housing 6 includes a first housing part 6a on the inside of the mask body 2 and a second housing part 6b on the outside thereof.
  • the first housing part 6a is provided with a valve seat 8 which extends in an annular manner around an inflow opening 9 which extends through the first housing part 6a.
  • the inflow opening 9 contains in the illustrated embodiment, a stiffening device 10 in the form of star-shaped, spoke-shaped struts which extend over the inflow opening 9.
  • the second housing part 6b is provided with a support surface 11 which extends annularly around the central axis 6 'and is designed to support the free end of the edge 7b of the sealing part 7.
  • a guide surface 12 is provided which serves as Ausknicktik, i. prevents unwanted, lateral displacement of the edge 7b.
  • the guide surface 12 is formed as an outer surface of a pedestal 13 which serves to center the seal member 7 within the housing 6, i. to hold in its predetermined position relative to the valve seat 8.
  • the base 13 is arranged so that it projects into the interior of the cup-shaped sealing part 7.
  • the centering function is further assisted by a flange 14, which is located radially outward with respect to the valve seat 8 on the first housing part 6a and extends in the direction of the second housing part 6b.
  • the radial distance between the guide surface 12 outside of the base 13 and the inwardly facing surface 14a on the flange 14 is dimensioned so that the sealing member 7 and in particular its edge 7b unhindered under the effect of Ausatemdruckes to lift off the valve seat 8 and for subsequent placement on can move the valve seat 8, an undesirable lateral displacement or even buckling and collapse of the sealing member 7, however, is prevented.
  • an outlet opening 15 Radially outside the support surface 11 extends through the second housing part 6b an outlet opening 15, which contains a plurality of individual, separated by material webs, annularly arranged around the support surface 11 individual openings in the illustrated embodiment.
  • the outlet opening 15 is connected via the valve seat 8 with the inflow opening 9 in connection.
  • the housing 6 further includes a first attachment means 16a serving to fix the first housing part 6a to the second housing part 6b, and a second attachment means 16b serving to fix the exhalation valve 5 to the mask body 2.
  • the first fastening device 16a includes a latching connection, which in the illustrated embodiment comprises two resiliently formed hooks 17a and 17b, which project from one housing part 6a, 6b in the direction of the other housing part 6b, 6a and engage in one another by compression.
  • the second fastening device 16b contains a clamping connection for the wall of the mask body 2, wherein a clamping surface 18a, 18b is provided on each of the housing parts 6a, 6b which clamp the wall of the mask body 2 around the opening 2a between them as soon as the two housing parts 6a, 6b are connected to one another via the first fastening device 16a.
  • the exhalation valve 5 is disposed in the opening 2a of the mask body 2 such that the first housing part 6a on the inside of the mask body 2, i. is arranged on the upstream side during exhalation.
  • the interior of the housing 6 is dimensioned and designed so that the free end of the rim 7b is supported on the support surface 11 and the sealing membrane 7a rests only on the valve seat 8 without the action of a respiratory pressure and convex by its convex into the interior of the mask body 2 training is biased against the valve seat 8.
  • the reinforcing device 10 has a distance to the sealing membrane 7a in this state.
  • the enhancer 10 is preferably configured to provide excessive deflection, i. prevents excessive movement of the sealing membrane 7a inwards.
  • a deflection stop 19 is provided on the first housing part 6a and there preferably on the reinforcing device 10.
  • the Auslenkanschlag 19 has a stop surface which is small compared to the surface of the sealing membrane 7a and is preferably arranged centrally to the sealing membrane 7a.
  • Another stop 20 is provided on the second housing part 6b, also arranged centrally, terminating at a distance a behind the sealing membrane 7a and limits the Opening movement, ie the lifting of the sealing membrane 7a from the valve seat 8. The distance a thus determines the range of motion of the sealing membrane 7a.
  • the housing 6 is further dimensioned and arranged so that the edge 7b of the sealing member 7 between the support surface 11 and the valve seat 8 when mounting the housing parts 6a and 6b is biased.
  • This bias by the elastically compressible edge 7b is added to the bias by the curvature of the sealing membrane 7a and determines the total pressure required to lift the sealing membrane 7a from the valve seat 8 and the exhalation valve 5 to open. It is preferred that at least a slight, additional compressive force is exerted on the sealing membrane 7a via the edge 7b in order to ensure that the sealing part 7 is firmly clamped between the support surface 11 and the valve seat 8, so that it can also be moved during violent movements of the sealing element 7 Carrier can not inadvertently lift off the valve seat 8.
  • the free end of the edge 7b can also be attached to the support surface 11, in particular glued.
  • the exhalation valve opens as soon as the wearer exhales and the exhalation air in the direction of the arrow A to the outside, i. the convexly curved side of the sealing membrane 7a flows against. If the inflow pressure is greater than the predetermined closing pressure and the deformation resistance of the sealing part 7, then the sealing membrane 7a lifts off from the valve seat 8 and a flow path through the inflow opening 9, the valve seat 8 to the outlet opening 15 is opened. When the wearer stops exhaling, the sealing part 7, by virtue of its material and form-elastic properties, moves back into its starting position, in which the sealing membrane 7a rests on the valve seat 8 and the exhalation valve 5 closes.
  • the edge of the sealing part by a separate part such as a compressible ring or the like. Be formed.
  • the housing does not necessarily have to be closed capsule-like, but it is also possible, for example, to provide the valve seat and the support surface on the mask body itself.
  • the housing can consist of more than two parts or can be folded in a sham-like manner.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Description

Die Erfindung bezieht sich auf eine Atemschutzmaske der im Oberbegriff von Anspruch 1 erläuterten Art.The invention relates to a respirator of the type explained in the preamble of claim 1.

Derartige Atemschutzmasken sind zum Schutz in staubhaltiger oder auf anderer Weise kontaminierter Umgebung weit verbreitet. Sie sind oft mit einem Ausatemventil versehen, um einerseits den Ausatemdruck zu reduzieren und um andererseits sicherzustellen, dass die feuchtigkeitshaltige Ausatemluft die Maske verlassen kann, ohne dass allzu viel der Feuchtigkeit der Ausatemluft durch das Filtermaterial zurückgehalten wird und möglicherweise die Filterwirkung beeinträchtigt. Derartige Ausatemventile sind in den unterschiedlichsten Konstruktionen bekannt.Such respirators are widely used for protection in dusty or otherwise contaminated environments. They are often provided with an exhalation valve to reduce expiratory pressure and to ensure that exhaled moist air can exit the mask without restraining too much of the exhaled air moisture through the filter material and possibly interfering with filtration. Such exhalation valves are known in a variety of constructions.

So zeigt beispielsweise die GB-A-20 72 516 eine der im Oberbegriff berücksichtigten Atemschutzmasken mit einem Ausatemventil, das eine flexible Dichtmembran verwendet. Die flexible Dichtmembran ist als Flächenstück ausgebildet und entweder in Form einer Ventilklappe partiell am Umfang befestigt oder als Ringventil ausgebildet, wobei die flächige Dichtmembran mittig befestigt ist und sich beim Anströmen schüsselförmig wölbt. Ein Problem dieser Ausatemventile ist darin zu sehen, dass das Material der Dichtmembran mit der Zeit ermüdet und sich Risse im Bereich der Befestigung zeigen können bzw. die Dichtmembran durch Nachlassen der flexiblen Eigenschaften nicht mehr dicht schließt.For example, shows the GB-A-20 72 516 one of the generic respirators with an exhalation valve that uses a flexible sealing membrane. The flexible sealing membrane is formed as a patch and either partially attached in the form of a valve flap on the circumference or formed as a ring valve, wherein the flat sealing membrane is mounted centrally and arched bowl-shaped when inflating. A problem with these exhalation valves is the fact that the material of the sealing membrane becomes fatigued over time and can show cracks in the region of the fastening or the sealing membrane no longer closes tightly due to the loss of the flexible properties.

Die US-A-4 241 756 zeigt ein Ausatemventil zur Verwendung in Geräten für eine künstliche Beatmung. Das Ausatemventil ist in eine Leitung eingeschaltet und enthält ein Dichtteil mit einer flexiblen, napfförmigen Dichtmembran. Die Dichtmembran ist zur Anströmseite hin geradlinig und eben und weist in einem Ausführungsbeispiel einen trapezförmig ausgeformten Rand auf. Der trapezförmig ausgeformte Rand weist einen Bereich auf, der an der der Anströmseite entgegengesetzten Seite der Dichtmembran vorsteht. Dieser vorstehende Rand mündet in einen parallel zur Dichtmembran verlaufenden Bereich, der an seiner zur Anströmseite weisenden Oberfläche auf einer Abstützfläche aufliegt. Der Übergang zwischen dem vorstehenden Bereich und dem parallelen Bereich ist an der entgegengesetzten Seite frei, so dass sich sowohl die Dichtmembran als auch der vorstehende Rand frei bewegen können. Beatmungsgeräte müssen jedoch nicht von den Benutzern getragen werden, wie dies bei Atemschutzmasken der Fall ist. Demzufolge muss nicht darauf geachtet werden, möglichst gewichtssparend zu konstruieren, so dass die Konstruktionen nicht unbedingt vergleichbar sind.The US-A-4,241,756 shows an exhalation valve for use in artificial respiration devices. The exhalation valve is switched on in a line and contains a sealing part with a flexible, cup-shaped sealing membrane. The sealing membrane is rectilinear and planar towards the inflow side and, in one embodiment, has a trapezoidal shaped edge. The trapezoidally shaped edge has a region which projects on the side of the sealing membrane opposite the inflow side. This protruding edge opens into a region extending parallel to the sealing membrane, which rests on a support surface on its surface facing the inflow side. The transition between the protruding portion and the parallel portion is free on the opposite side, so that both the sealing membrane and the protruding edge can move freely. However, ventilators do not have to be worn by users, as is the case with respirators. Consequently, care must be taken not to construct as weight-saving as possible, so that the designs are not necessarily comparable.

Um die Schließkraft zu verbessern ist es weiterhin bereits aus der EP-B-756 881 bekannt, die Dichtmembran eines Ausatemventils für eine Atemschutzmaske zur Vorspannung zu krümmen, so dass die Schließkraft und die Schließbereitschaft des Rückschlagventils verbessert wird. Aber auch dieses Ventil ist als Klappenventil ausgebildet, so dass mögliche Probleme durch Materialermüdung an der Befestigungsstelle nicht gelöst werden können.To improve the closing force, it is still out of the EP-B-756 881 It is known to bend the sealing membrane of an exhalation valve for a respiratory mask to the bias, so that the closing force and the readiness for closure of the check valve is improved. But even this valve is designed as a flap valve, so that potential problems due to material fatigue at the attachment point can not be solved.

Aus der EP-B-267 428 ist weiterhin eine Atemschutzmaske mit einem Ausatemventil bekannt, das versucht, die Probleme mit der starren Befestigung der Dichtmembran im Stand der Technik zu lösen. Zu diesem Zweck wird ein Ventil vom Lippenventiltyp eingesetzt, das ohne starre Befestigung im Bewegungsbereich der Dichtmembran auskommt. Das bekannte Ausatemventil besteht aus einem Einknöpfbereich in eine Öffnung einer Wandung der Atemschutzmaske, der als Halteflansch für eine als Membran ausgebildete Anströmfläche dient, die über einen Teil ihres Umfangs mit dem Halteflansch verbunden ist und über den restlichen Teil ihres Umfangs in eine Art flachgelegten Schlauch mündet, der ein Lippenventil bildet. Alle Teile sind einstückig aus dem gleichen flexiblen Material gefertigt, so dass sich die Membran und das Lippenventil nicht gegen eine starre Halterung bewegen müssen. Diese Ausgestaltung ist jedoch ebenfalls noch verbesserungsfähig.From the EP-B-267 428 Furthermore, a respirator with an exhalation valve is known, which tries to solve the problems with the rigid attachment of the sealing membrane in the prior art. For this purpose, a valve of the lip valve type is used, which manages without rigid attachment in the range of movement of the sealing membrane. The well-known exhalation valve consists of a Einknöpfbereich in one Opening a wall of the respirator, which serves as a retaining flange for a membrane formed as an inflow surface, which is connected over part of its circumference with the retaining flange and opens over the remaining part of its circumference in a kind of flattened tube forming a lip valve. All parts are made in one piece from the same flexible material so that the diaphragm and the lip valve do not have to move against a rigid support. However, this embodiment is also still capable of improvement.

Aus der US-A-3 029 812 ist eine Atemschutzmaske mit einem Ausatemventil bekannt, das einen nach außen vorstehenden, ringförmigen Stutzen und eine Dichtmembran aufweist, die mit ihrem Rand auf der Außenseite des Stutzen befestigt ist. Um jedoch das Ausatmen zu ermöglichen, müssen im Rand Ausatemöffnungen vorgesehen sein, die die Ausatemluft durchlassen. Dadurch wird jedoch die Haltbarkeit der Dichtmembran entscheidend verringert.From the US-A-3,029,812 a respirator with an exhalation valve is known which has an outwardly projecting, annular nozzle and a sealing membrane which is fastened with its edge on the outside of the neck. However, to allow exhalation, exhalation ports must be provided in the rim to allow the exhaled air to pass. However, this significantly reduces the durability of the sealing membrane.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Atemschutzmaske mit einem einfach herstellbaren und haltbaren Ausatemventil zu schaffen.The invention is therefore an object of the invention to provide a respirator with a simple to produce and durable exhalation valve.

Die Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst.The object is solved by the features specified in claim 1.

Durch die erfindungsgemäße Ausgestaltung wird ein sehr flaches, kostengünstiges und einfach herstellbares Ausatemventil mit einer verlängerten Haltbarkeit geschaffen. Durch die napfförmige Ausgestaltung des Dichtteils mit der zur Anströmseite hin gewölbten Anströmfläche und dem von der entgegengesetzten Seite vorstehenden und an einer Abstützfläche abgestützten Rand, kann sich die Dichtmembran zum Öffnen und Schließen des Ausatemventils frei bewegen, auch ohne dass die Dichtmembran an irgendeiner Stelle fest eingeklemmt oder sonst wie festgehalten wird. Durch die Wölbung der Anströmfläche, dem Anströmdruck entgegen, wird das Dichtteil unter Vorspannung gesetzt, so dass es sich nach Beendigung des Ausatmens und insbesondere während des Einatmens wieder fest an den Ventilsitz anlegt.The inventive design a very flat, inexpensive and easy to produce exhalation valve is provided with a prolonged durability. Due to the cup-shaped design of the sealing member with the inflow to the upstream side and the supported by the opposite side edge supported on a support surface, the sealing membrane for opening and closing the exhalation valve can move freely, even without the sealing membrane clamped at any point or otherwise as recorded. Due to the curvature of the inflow surface, counter to the inflow pressure, the sealing part is placed under pretension, so that it rests firmly on the valve seat after completion of exhalation and in particular during inhalation.

Die Schließkraft der Dichtmembran und demzufolge auch die Geschwindigkeit, mit der sich die Dichtmembran nach dem Ausatmen wieder auf den Ventilsitz legt, wird noch entscheidend verbessert, wenn der Rand elastisch zusammendrückbar, insbesondere faltenbalgartig gewellt ist. Durch diese Ausgestaltung wird auch der Rand beim Ausatmen elastisch zusammengedrückt, und entspannt sich sofort wieder, wenn der Ausatemdruck nachlässt. Darüber hinaus kann dafür gesorgt werden, dass der Rand auch bei geschlossenem Ausatemventil elastisch vorgespannt ist, so dass die Dichtmembran zusätzlich in Richtung auf den Ventilsitz belastet wird.The closing force of the sealing membrane and consequently the speed with which the sealing membrane rests on the valve seat after exhaling, is still decisively improved when the edge is elastically compressible, in particular bellows-like wavy. By this embodiment, the edge is elastically compressed during exhalation, and immediately relaxes again when the exhalation decreases. In addition, it can be ensured that the edge is resiliently biased even when the exhalation valve is closed, so that the sealing membrane is additionally loaded in the direction of the valve seat.

Um Fehlbewegungen, insbesondere ein seitliches Ausknicken des Randes zu vermeiden, sollte bevorzugt ein Ausknickschutz mit wenigstens einer Führungsfläche vorgesehen werden.In order to avoid incorrect movements, in particular a lateral buckling of the edge, a buckling protection with at least one guide surface should preferably be provided.

Um eine Verlagerung des Dichtteils während des Gebrauchs zu verhindern, sollte das napfförmige Dichtteil lagefixiert, insbesondere über seinen Rand zentriert werden.In order to prevent a displacement of the sealing part during use, the cup-shaped sealing part should be fixed in position, in particular centered over its edge.

Um zu vermeiden, dass ein übermäßiger Ausatemdruck die Dichtmembran übermäßig bewegt, d.h. stärker bewegt, als dies zum Erreichen eines optimal großen Ausströmquerschnittes notwendig ist, und/oder um sicherzustellen, dass die Dichtmembran beim Einatmen nicht in den Ventilsitz hineingezogen wird, sollte zweckmäßigerweise eine Auslenkbegrenzung zum Begrenzen der Bewegung der Dichtmembran beim Ein-und/oder Ausatmen vorgesehen sein.To avoid excessive exhalation pressure over-moving the sealing membrane, i. moved more than is necessary to achieve an optimally large Ausströmquerschnittes, and / or to ensure that the sealing membrane is not drawn into the valve seat during inhalation, a deflection restriction for limiting the movement of the sealing membrane during inhalation and / or exhalation should be expediently provided be.

Die Montage des Ausatemventils und dessen Befestigung an der Atemschutzmaske wird wesentlich erleichtert, wenn Gehäuseteile des Ausatemventils eine Befestigungseinrichtung zum Befestigen der Gehäuseteile untereinander und an der Atemschutzmaske enthalten, wobei die Befestigungseinrichtung bevorzugt eine Rastenrichtung zum Verbinden der Gehäuseteile und Klemmflächen zum Einklemmen eines Bereichs der Atemschutzmaske aufweist.The mounting of the exhalation valve and its attachment to the respiratory mask is substantially facilitated if housing parts of the exhalation valve include a fastening device for fastening the housing parts to one another and to the respiratory mask, the fastening device preferably having a detent direction for connecting the housing parts and clamping surfaces for clamping a region of the respiratory mask ,

Durch eine zweckmäßige Anordnung der Anströmöffnung innerhalb des Ventilsitzes und einer Auslassöffnung außerhalb der Abstützfläche für den Rand, wird sichergestellt, dass der Strömungsweg nicht durch das Material des Dichtteils hindurchlaufen muss.By an appropriate arrangement of the inflow opening within the valve seat and an outlet opening outside the supporting surface for the edge, it is ensured that the flow path does not have to pass through the material of the sealing part.

Das Atemschutzventil ist bevorzugt gekapselt, um eine sichere Befestigung an der Atemschutzmaske sicherzustellen und zu verhindern, dass sich das Dichtteil unbeabsichtigt verlagert.The respirator is preferably sealed to ensure secure attachment to the respirator and to prevent the seal from shifting inadvertently.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine perspektivische, schematische Darstellung einer erfindungsgemäßen Atemschutzmaske,
Fig. 2
eine geschnittene, perspektivische Darstellung eines Ausatemventils,
Fig. 3
die Schnittansicht durch das Ausatemventil, und
Fig. 4
eine perspektivische Ansicht des Ausatemventils von der Innenseite der Atemschutzmaske.
An embodiment of the invention will be explained in more detail with reference to the drawings. Show it:
Fig. 1
a perspective, schematic representation of a respirator according to the invention,
Fig. 2
a sectional perspective view of an exhalation valve,
Fig. 3
the sectional view through the exhalation valve, and
Fig. 4
a perspective view of the exhalation valve from the inside of the respirator.

Fig. 1 zeigt eine schematische, perspektivische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Atemschutzmaske 1, die von jeder herkömmlichen Art sein kann. Im dargestellten Ausführungsbeispiel enthält die Atemschutzmaske 1 einen Maskenkörper 2, der so ausgebildet ist, dass er Mund und Nase des Benutzers bedeckt und an den Wangen, über den Nasenrücken und unter dem Kinn des Benutzers abdichtend am Gesicht des Trägers anliegt. Masken dieser Art werden auch als Halbmasken oder Gesichtsmasken bezeichnet. Im dargestellten Ausführungsbeispiel enthält die Atemschutzmaske 1 einen Maskenkörper 2, der aus einer filtrierenden Wandung formgepresst oder tiefgezogen ist, wobei der Maskenkörper 2 eine gewisse formhaltige Steifheit aufweist, d.h. beim Einatmen nicht kollabiert bzw. zusammenfällt und sich beim Ausatmen nicht von seinem Dichtsitz am Gesicht des Trägers hebt. Auch der Maskenkörper 2 kann auf übliche Weise und mit bekannten Materialien hergestellt sein. Die Atemschutzmaske 1 wird mit Hilfe einer Kopfbebänderung 3 am Kopf des Trägers in üblicher Weise befestigt. Im dargestellten Ausführungsbeispiel ist die Kopfbebänderung 3 mit Hilfe von Laschen 4 am Maskenkörper 2 befestigt, die einen Tunnel für einen Längenausgleich der Kopfbebänderung 3 bilden. Die Kopfbebänderung 3 kann jedoch auch fest mit dem Maskenkörper 2 verbunden werden.Fig. 1 shows a schematic perspective view of an embodiment of a respirator 1 according to the invention, which may be of any conventional type. In the illustrated embodiment, the respirator 1 includes a mask body 2 that is configured to cover the user's mouth and nose and sealingly engage the cheeks, over the bridge of the nose and under the user's chin, against the wearer's face. Masks of this type are also referred to as half masks or face masks. In the illustrated embodiment, the respirator 1 includes a mask body 2, which is molded or deep drawn from a filtering wall, wherein the mask body 2 has a certain dimensional stiffness, ie not collapsing or collapsing during inhalation and not exhale from its sealing seat on the face of the Carrier lifts. Also, the mask body 2 may be made in a conventional manner and with known materials. The respirator 1 is attached by means of a headband 3 at the head of the wearer in the usual way. In the illustrated embodiment, the headband 3 is fixed by means of tabs 4 on the mask body 2, a Make tunnel for a length adjustment of the harness 3. However, the headband 3 can also be firmly connected to the mask body 2.

Die Atemschutzmaske 1 ist weiterhin mit einem Ausatemventil 5 versehen, das in einer Öffnung 2a im Maskenkörper 2 angeordnet ist. Das Ausatemventil 5 ist an einer Stelle des Maskenkörpers 2 angeordnet, die bevorzugt direkt von der Strömung beaufschlagt wird, die der Träger beim Ausatmen erzeugt.The respirator 1 is further provided with an exhalation valve 5, which is arranged in an opening 2 a in the mask body 2. The exhalation valve 5 is arranged at a location of the mask body 2, which is preferably acted upon directly by the flow, which generates the carrier during exhalation.

Wie auch in Verbindung mit den Fig. 2 bis 4 ersichtlich, enthält das Ausatemventil 5 ein Gehäuse 6, das als flache, linsenförmige Kapsel mit einer Mittelachse 6' ausgebildet ist und in seinem Inneren ein Dichtteil 7 umschließt. Das Dichtteil 7 enthält eine kreisförmige Dichtmembran 7a und einen von der Dichtmembran 7a umfangsseitig vorstehenden Rand 7b, der sich um den gesamten Umfang der Dichtmembran 7a herum erstreckt; d.h. das Dichtteil 7 ist im Wesentlichen napfförmig ausgebildet, wobei die Dichtmembran 7a den Boden bildet und der vorstehende Rand 7b die Seitenwandung. Die Dichtmembran 7a ist auf der dem Rand 7b gegenüberliegenden Seite gewölbt.As can also be seen in connection with FIGS. 2 to 4, the exhalation valve 5 includes a housing 6, which is formed as a flat, lenticular capsule with a central axis 6 'and encloses a sealing part 7 in its interior. The seal member 7 includes a circular seal diaphragm 7a and a peripheral edge 7b projecting from the seal diaphragm 7a and extending around the entire circumference of the seal diaphragm 7a; i.e. the sealing member 7 is formed substantially cup-shaped, wherein the sealing membrane 7a forms the bottom and the protruding edge 7b, the side wall. The sealing membrane 7a is arched on the side opposite the edge 7b.

Das Dichtteil 7 mit der Dichtmembran 7a und dem Rand 7b ist bevorzugt einstückig ausgebildet und besteht aus einem flexiblen Material, beispielsweise einem Kunststoff oder einem Gummi, wie er auch bisher für Dichtmembrane von Ausatemventilen verwendet wurde.The sealing part 7 with the sealing membrane 7a and the edge 7b is preferably formed in one piece and consists of a flexible material, such as a plastic or a rubber, as it has also been used for sealing membranes of exhalation valves.

Der Rand 7b ist derart ausgebildet, dass er entlang seiner Längserstreckung zwischen seinem freien Ende und der Dichtmembran 7a elastisch zusammendrückbar ist. Dies wird im dargestellten Ausführungsbeispiel dadurch ermöglicht, dass der Rand 7b faltenbalgartig gewellt ist. Diese faltenbalgartigen Wellungen können bereits bei der Herstellung des Dichtteils 7 vorgeformt werden oder können sich erst im nachfolgend beschriebenen Montagezustand ergeben. Es ist auch möglich, die gewünschten Stellen einer Wellung auf dem Rand 7b in Form von Einprägungen oder dgl. vorzugeben, um sicherzustellen, dass sich der Rand 7b in der gewünschten Weise wellt, wenn er durch Druck auf sein freies Ende in Richtung auf die Dichtmembran 7a belastet wird.The edge 7b is formed such that it is elastically compressible along its longitudinal extent between its free end and the sealing membrane 7a. This is made possible in the illustrated embodiment in that the edge 7b is corrugated bellows. These bellows-like corrugations can already be preformed during the production of the sealing part 7 or can only result in the assembly state described below. It is also possible to specify the desired locations of a corrugation on the edge 7b in the form of indentations or the like, in order to ensure that the edge 7b curls in the desired manner when it is pressed against its free end in the direction of the sealing membrane 7a is charged.

Das Gehäuse 6 enthält ein erstes Gehäuseteil 6a an der Innenseite des Maskenkörpers 2 und ein zweites Gehäuseteil 6b an dessen Außenseite. Das erste Gehäuseteil 6a ist mit einem Ventilsitz 8 versehen, der sich ringförmig geschlossen um eine Anströmöffnung 9 erstreckt, die durch das erste Gehäuseteil 6a hindurch reicht. Die Anströmöffnung 9 enthält im dargestellten Ausführungsbeispiel eine Versteifungseinrichtung 10 in Form von sternförmig angeordneten, speichenförmig ausgebildeten Streben, die sich über die Anströmöffnung 9 erstrecken.The housing 6 includes a first housing part 6a on the inside of the mask body 2 and a second housing part 6b on the outside thereof. The first housing part 6a is provided with a valve seat 8 which extends in an annular manner around an inflow opening 9 which extends through the first housing part 6a. The inflow opening 9 contains in the illustrated embodiment, a stiffening device 10 in the form of star-shaped, spoke-shaped struts which extend over the inflow opening 9.

Das zweite Gehäuseteil 6b ist mit einer Abstützfläche 11 versehen, die ringförmig um die Mittelachse 6' verläuft und zum Abstützen des freien Endes des Randes 7b des Dichtteils 7 ausgebildet ist. Radial innerhalb oder radial außerhalb der Abstützfläche 11 ist eine Führungsfläche 12 vorgesehen, die als Ausknickschutz dient, d.h. eine unerwünschte, seitliche Verlagerung des Randes 7b verhindert. Die Führungsfläche 12 ist als Außenfläche eines Sockels 13 ausgebildet, der dazu dient, das Dichtteil 7 innerhalb des Gehäuses 6 zu zentrieren, d.h. in seiner vorbestimmten Stellung relativ zum Ventilsitz 8 zu halten. Der Sockel 13 ist so angeordnet, dass er in das Innere des napfförmigen Dichtteils 7 hineinragt. Die Zentrierfunktion wird noch unterstützt durch einen Flansch 14, der sich radial auswärts bezüglich des Ventilsitzes 8 am ersten Gehäuseteil 6a befindet und sich in Richtung auf das zweite Gehäuseteil 6b erstreckt. Der radiale Abstand zwischen der Führungsfläche 12 außen am Sockel 13 und der nach innen weisenden Fläche 14a am Flansch 14 ist so bemessen, dass sich das Dichtteil 7 und insbesondere sein Rand 7b ungehindert unter Wirkung des Ausatemdruckes zum Abheben vom Ventilsitz 8 und zum darauffolgenden Aufsetzen auf den Ventilsitz 8 bewegen kann, eine unerwünschte seitliche Verlagerung oder gar ein Ausknicken und Zusammenfallen des Dichtteils 7 jedoch verhindert wird.The second housing part 6b is provided with a support surface 11 which extends annularly around the central axis 6 'and is designed to support the free end of the edge 7b of the sealing part 7. Radially inside or radially outside the support surface 11, a guide surface 12 is provided which serves as Ausknickschutz, i. prevents unwanted, lateral displacement of the edge 7b. The guide surface 12 is formed as an outer surface of a pedestal 13 which serves to center the seal member 7 within the housing 6, i. to hold in its predetermined position relative to the valve seat 8. The base 13 is arranged so that it projects into the interior of the cup-shaped sealing part 7. The centering function is further assisted by a flange 14, which is located radially outward with respect to the valve seat 8 on the first housing part 6a and extends in the direction of the second housing part 6b. The radial distance between the guide surface 12 outside of the base 13 and the inwardly facing surface 14a on the flange 14 is dimensioned so that the sealing member 7 and in particular its edge 7b unhindered under the effect of Ausatemdruckes to lift off the valve seat 8 and for subsequent placement on can move the valve seat 8, an undesirable lateral displacement or even buckling and collapse of the sealing member 7, however, is prevented.

Radial außerhalb der Abstützfläche 11 erstreckt sich durch das zweite Gehäuseteil 6b eine Auslassöffnung 15, die im dargestellten Ausführungsbeispiel eine Vielzahl einzelner, durch Materialstege voneinander getrennter, ringförmig um die Abstützfläche 11 angeordneter Einzelöffnungen enthält. Die Auslassöffnung 15 steht über den Ventilsitz 8 mit der Anströmöffnung 9 in Verbindung.Radially outside the support surface 11 extends through the second housing part 6b an outlet opening 15, which contains a plurality of individual, separated by material webs, annularly arranged around the support surface 11 individual openings in the illustrated embodiment. The outlet opening 15 is connected via the valve seat 8 with the inflow opening 9 in connection.

Das Gehäuse 6 enthält weiterhin eine erste Befestigungseinrichtung 16a, die dazu dient, das erste Gehäuseteil 6a am zweiten Gehäuseteil 6b zu befestigen, sowie eine zweite Befestigungseinrichtung 16b, die dazu dient, das Ausatemventil 5 am Maskenkörper 2 zu befestigen.The housing 6 further includes a first attachment means 16a serving to fix the first housing part 6a to the second housing part 6b, and a second attachment means 16b serving to fix the exhalation valve 5 to the mask body 2.

Die erste Befestigungseinrichtung 16a enthält eine Rastverbindung, die im dargestellten Ausführungsbeispiel zwei federnd ausgebildete Haken 17a und 17b umfasst, die von jeweils einem Gehäuseteil 6a, 6b in Richtung auf das andere Gehäuseteil 6b, 6a vorstehen und durch Zusammendrücken ineinander greifen.The first fastening device 16a includes a latching connection, which in the illustrated embodiment comprises two resiliently formed hooks 17a and 17b, which project from one housing part 6a, 6b in the direction of the other housing part 6b, 6a and engage in one another by compression.

Die zweite Befestigungseinrichtung 16b enthält eine Klemmverbindung für die Wandung des Maskenkörpers 2, wobei an jedem der Gehäuseteile 6a, 6b jeweils eine Klemmfläche 18a, 18b vorgesehen ist, die die Wandung des Maskenkörpers 2 rund um die Öffnung 2a zwischen sich einklemmen, sobald die beiden Gehäuseteile 6a, 6b über die erste Befestigungseinrichtung 16a miteinander verbunden sind.The second fastening device 16b contains a clamping connection for the wall of the mask body 2, wherein a clamping surface 18a, 18b is provided on each of the housing parts 6a, 6b which clamp the wall of the mask body 2 around the opening 2a between them as soon as the two housing parts 6a, 6b are connected to one another via the first fastening device 16a.

Das Ausatemventil 5 ist so in der Öffnung 2a des Maskenkörpers 2 angeordnet, dass das erste Gehäuseteil 6a an der Innenseite des Maskenkörpers 2, d.h. an der Anströmseite beim Ausatmen angeordnet ist. Das Innere des Gehäuses 6 ist so bemessen und ausgebildet, dass sich das freie Ende des Randes 7b auf der Abstützfläche 11 abstützt und die Dichtmembran 7a ohne Einwirkung eines Atemdruckes lediglich auf dem Ventilsitz 8 aufliegt und durch ihre konvex in das Innere des Maskenkörpers 2 gewölbte Ausbildung gegen den Ventilsitz 8 vorgespannt ist. Die Verstärkungseinrichtung 10 weist in diesem Zustand einen Abstand zur Dichtmembran 7a auf. Die Verstärkungseinrichtung 10 ist jedoch bevorzugt so ausgebildet, dass sie eine übermäßige Auslenkung, d.h. eine übermäßige Bewegung der Dichtmembran 7a nach innen verhindert. Zu diesem Zweck ist ein Auslenkanschlag 19 am ersten Gehäuseteil 6a und dort bevorzugt an der Verstärkungseinrichtung 10 vorgesehen. Der Auslenkanschlag 19 hat eine Anschlagfläche, die klein gegenüber der Fläche der Dichtmembran 7a ist und ist bevorzugt mittig zur Dichtmembran 7a angeordnet.The exhalation valve 5 is disposed in the opening 2a of the mask body 2 such that the first housing part 6a on the inside of the mask body 2, i. is arranged on the upstream side during exhalation. The interior of the housing 6 is dimensioned and designed so that the free end of the rim 7b is supported on the support surface 11 and the sealing membrane 7a rests only on the valve seat 8 without the action of a respiratory pressure and convex by its convex into the interior of the mask body 2 training is biased against the valve seat 8. The reinforcing device 10 has a distance to the sealing membrane 7a in this state. However, the enhancer 10 is preferably configured to provide excessive deflection, i. prevents excessive movement of the sealing membrane 7a inwards. For this purpose, a deflection stop 19 is provided on the first housing part 6a and there preferably on the reinforcing device 10. The Auslenkanschlag 19 has a stop surface which is small compared to the surface of the sealing membrane 7a and is preferably arranged centrally to the sealing membrane 7a.

Ein weiterer Anschlag 20 ist am zweiten Gehäuseteil 6b vorgesehen, ebenfalls mittig angeordnet, endet in einem Abstand a hinter der Dichtmembran 7a und begrenzt die Öffnungsbewegung, d.h. das Abheben der Dichtmembran 7a vom Ventilsitz 8. Der Abstand a bestimmt somit den Bewegungsspielraum der Dichtmembran 7a.Another stop 20 is provided on the second housing part 6b, also arranged centrally, terminating at a distance a behind the sealing membrane 7a and limits the Opening movement, ie the lifting of the sealing membrane 7a from the valve seat 8. The distance a thus determines the range of motion of the sealing membrane 7a.

Das Gehäuse 6 ist weiterhin so bemessen und angeordnet, dass der Rand 7b des Dichtteils 7 zwischen der Abstützfläche 11 und dem Ventilsitz 8 beim Befestigen der Gehäuseteile 6a und 6b unter Vorspannung gesetzt wird. Diese Vorspannung durch den elastisch zusammendrückbaren Rand 7b addiert sich zur Vorspannung durch die Wölbung der Dichtmembran 7a und bestimmt den Gesamtdruck, der erforderlich ist, um die Dichtmembran 7a vom Ventilsitz 8 abzuheben und das Ausatemventil 5 zu öffnen. Es ist bevorzugt, dass über den Rand 7b zumindest eine geringe, zusätzliche Druckkraft auf die Dichtmembran 7a ausgeübt wird, um sicherzustellen, dass das Dichtteil 7 fest zwischen der Abstützfläche 11 und dem Ventilsitz 8 eingespannt ist, so dass es sich auch bei heftigen Bewegungen des Trägers nicht unbeabsichtigt vom Ventilsitz 8 abheben kann. Zusätzlich kann das freie Ende des Randes 7b auch an der Abstützfläche 11 befestigt, insbesondere angeklebt sein.The housing 6 is further dimensioned and arranged so that the edge 7b of the sealing member 7 between the support surface 11 and the valve seat 8 when mounting the housing parts 6a and 6b is biased. This bias by the elastically compressible edge 7b is added to the bias by the curvature of the sealing membrane 7a and determines the total pressure required to lift the sealing membrane 7a from the valve seat 8 and the exhalation valve 5 to open. It is preferred that at least a slight, additional compressive force is exerted on the sealing membrane 7a via the edge 7b in order to ensure that the sealing part 7 is firmly clamped between the support surface 11 and the valve seat 8, so that it can also be moved during violent movements of the sealing element 7 Carrier can not inadvertently lift off the valve seat 8. In addition, the free end of the edge 7b can also be attached to the support surface 11, in particular glued.

Das Ausatemventil öffnet sich, sobald der Träger ausatmet und die Ausatemluft in Richtung des Pfeiles A an die Außenseite, d.h. die konvex gewölbte Seite der Dichtmembran 7a anströmt. Ist der Anströmdruck größer als der vorbestimmte Schließdruck und Vertormungswiderstand des Dichtteiles 7, so hebt sich die Dichtmembran 7a vom Ventilsitz 8 ab und es wird ein Strömungsweg durch die Anströmöffnung 9, den Ventilsitz 8 zur Auslassöffnung 15 geöffnet. Beendet der Träger das Ausatmen, bewegt sich das Dichtteil 7 durch seine material- und formelastischen Eigenschaften zurück in seine Ausgangsposition, in der die Dichtmembran 7a auf dem Ventilsitz 8 aufliegt und das Ausatemventil 5 schließt.The exhalation valve opens as soon as the wearer exhales and the exhalation air in the direction of the arrow A to the outside, i. the convexly curved side of the sealing membrane 7a flows against. If the inflow pressure is greater than the predetermined closing pressure and the deformation resistance of the sealing part 7, then the sealing membrane 7a lifts off from the valve seat 8 and a flow path through the inflow opening 9, the valve seat 8 to the outlet opening 15 is opened. When the wearer stops exhaling, the sealing part 7, by virtue of its material and form-elastic properties, moves back into its starting position, in which the sealing membrane 7a rests on the valve seat 8 and the exhalation valve 5 closes.

In Abwandlung der beschriebenen und gezeichneten Ausführungsbeispiele kann beispielsweise der Rand des Dichtteils durch ein gesondertes Teil, beispielsweise einen komprimierbaren Ring oder dgl. ausgebildet werden. Das Gehäuse muss nicht unbedingt kapselförmig geschlossen sein, sondern es ist beispielsweise auch möglich, den Ventilsitz und die Abstützfläche am Maskenkörper selbst vorzusehen. Das Gehäuse kann aus mehr als zwei Teilen bestehen oder kann schamierartig zusammengeklappt werden.In a modification of the described and illustrated embodiments, for example, the edge of the sealing part by a separate part, such as a compressible ring or the like. Be formed. The housing does not necessarily have to be closed capsule-like, but it is also possible, for example, to provide the valve seat and the support surface on the mask body itself. The housing can consist of more than two parts or can be folded in a sham-like manner.

Claims (10)

  1. Breathing mask (1) having an exhalation valve (5), which has a valve seat (8) arranged annularly and a flexible sealing part (7) having a sealing diaphragm (7a) and a rim (7b), characterized in that the sealing part (7) is bowl-shaped, the sealing diaphragm (7a) interacting with the valve seat (8) with an inlet surface curved towards the inlet side, and the rim (7b) projecting on the side of the sealing diaphragm (7a) opposite the inlet side and being supported on a supporting surface (11).
  2. Breathing mask according to Claim 1, characterized in that the rim (7b) is corrugated in such a way that it can be compressed elastically, in particular in the manner of a bellows.
  3. Breathing mask according to Claim 1 or 2, characterized in that the rim (7b) is assigned an anti-buckling safeguard (13) having at least one guide surface (12).
  4. Breathing mask according to one of Claims 1 to 3, characterized in that the bowl-shaped sealing part (7) is centred over the rim (7b).
  5. Breathing mask according to one of Claims 1 to 4, characterized in that a deflection limiting means (19, 20) is provided in order to limit the movement of the sealing diaphragm (7a) during inhalation and/or exhalation.
  6. Breathing mask according to one of Claims 1 to 5, characterized in that the exhalation valve (5) comprises a housing (6), and in that, between a first housing part (6a) provided with the valve seat (8) and a second housing part (6b) supporting the rim (7b), there is provided a fixing device (16a, 16b) for fixing the housing parts (6a, 6b) to one another and to the breathing mask (1).
  7. Breathing mask according to Claim 6, characterized in that the fixing device (16a, 16b) has a latching device (17a, 17b) for connecting the housing parts (6a, 6b) and clamping surfaces (18a, 18b) for clamping in a region (2) of the breathing mask (1).
  8. Breathing mask according to one of Claims 1 to 7, characterized in that at least one inlet opening (9) arranged radially within the valve seat (8) is provided.
  9. Breathing mask according to one of Claims 1 to 8, characterized in that at least one outlet opening (15) arranged radially outside the supporting surface (11) is provided.
  10. Breathing mask according to one of Claims 6 to 9, characterized in that the housing (6) is constructed as a capsule comprising a first and a second housing part (6a, 6b) which, while enclosing the sealing part (7) and clamping in a region of the breathing mask (1), are connected to each other and fixed to the breathing mask (1).
EP20040024666 2004-10-15 2004-10-15 Breathing mask with exhalation valve Expired - Fee Related EP1647310B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20040024666 EP1647310B1 (en) 2004-10-15 2004-10-15 Breathing mask with exhalation valve
DE200450004668 DE502004004668D1 (en) 2004-10-15 2004-10-15 Respirator with exhalation valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040024666 EP1647310B1 (en) 2004-10-15 2004-10-15 Breathing mask with exhalation valve

Publications (2)

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EP1647310A1 EP1647310A1 (en) 2006-04-19
EP1647310B1 true EP1647310B1 (en) 2007-08-15

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USD827811S1 (en) 2016-09-16 2018-09-04 3M Innovative Properties Company Valve cover
USD827812S1 (en) 2016-09-16 2018-09-04 3M Innovative Properties Company Valve cover with openings
USD828546S1 (en) 2016-09-16 2018-09-11 3M Innovative Properties Company Valve cover with openings
USD842983S1 (en) 2016-09-16 2019-03-12 3M Innovative Properties Company Valve cover
USD843562S1 (en) 2016-09-16 2019-03-19 3M Innovative Properties Company Valve cover with diamond pattern
USD849245S1 (en) 2016-09-16 2019-05-21 3M Innovative Properties Company Valve cover
DE102022113700A1 (en) 2022-05-31 2023-11-30 Dräger Safety AG & Co. KGaA Valve arrangement for a respiratory mask
WO2023232173A1 (en) 2022-05-31 2023-12-07 Dräger Safety AG & Co. KGaA Valve arrangement for a respiratory mask

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DE502004004668D1 (en) 2007-09-27

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