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EP3978081A1 - Masque respiratoire pourvu de soupape à disques - Google Patents

Masque respiratoire pourvu de soupape à disques Download PDF

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Publication number
EP3978081A1
EP3978081A1 EP20199306.0A EP20199306A EP3978081A1 EP 3978081 A1 EP3978081 A1 EP 3978081A1 EP 20199306 A EP20199306 A EP 20199306A EP 3978081 A1 EP3978081 A1 EP 3978081A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve device
carrier body
opening
sealing surface
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Withdrawn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
EP20199306.0A
Other languages
German (de)
English (en)
Inventor
Torben Skov
Roman Skov
Gregor Andreas KRZEMPEK
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.)
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.)
Filing date
Publication date
Application filed by Moldex Metric AG and Co KG filed Critical Moldex Metric AG and Co KG
Priority to EP20199306.0A priority Critical patent/EP3978081A1/fr
Publication of EP3978081A1 publication Critical patent/EP3978081A1/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Withdrawn legal-status Critical Current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
    • A62B18/10—Valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A62B18/025—Halfmasks

Definitions

  • the invention relates to a valve device for a breathing mask, with a carrier body which can be fastened to a mask body of the breathing mask and has a valve opening through which flow can flow axially, the carrier body having a valve seat which surrounds the valve opening in a circle or annular shape with a continuous sealing surface, and with an elastically deformable seat Valve element, which is designed in the shape of a circular disk and is attached to the carrier body at an attachment point in the center of the valve opening in such a way that, in an unactuated state, it rests sealingly on the sealing surface at the edge, the valve seat having a longitudinal extension transverse to the direction of flow leading through the center of the valve opening and a having transverse extension leading through the center point.
  • the invention relates to a breathing mask, in particular for a human user, with a mask body which is designed to cover the user's mouth and nose when used as intended and to lie tightly against the user's face at the edge, and with a valve device arranged on the mask body , as described above.
  • valve devices and breathing masks with corresponding valve devices are already known from the prior art.
  • the disclosure document discloses U.S. 2009/0151728 A1 a generic valve device for a breathing mask.
  • Respiratory masks are generally used to protect the user of the respirator from airborne contaminants such as smoke, dust, foreign particles or aerosols, so that the inhaled air can only get through the filter material of the mask body to the mouth or nose of the user.
  • the mask body is generally designed to be filtering.
  • it is known not to return the airflow the same way, i.e. directly through the material of the mask body, but through a valve device which offers less air resistance.
  • valve devices have a valve element that is fixed at one end and that can detach from a sealing surface at the other end.
  • a valve element that is fixed at one end and that can detach from a sealing surface at the other end.
  • the valve device of the generic type known from the publication first mentioned above has the advantage that the valve element can detach from the sealing surface at two points, as a result of which a low back pressure is ensured when exhaling.
  • the invention is based on the object of creating an improved valve device in which, in particular, the back pressure is further reduced and the probability of droplet formation on the inside of the breathing mask facing the user is minimized.
  • valve device having the features of claim 1 .
  • This has the advantage that by pre-bending the valve element in its non-actuated position or in its non-actuated state, the detachment of the valve element from the sealing surface on both sides of the attachment point is made easier, thereby further reducing the back pressure when exhaling.
  • the valve element Due to the embodiment of the valve seat according to the invention, the valve element is already bent in the direction in which the valve element would move during an exhalation process with sufficient air pressure at the edge regions lying opposite one another, in relation to the attachment point. This preforming eliminates the initial energy that would have to be expended to move the valve element from a flat position, as is the case in the published application U.S.
  • the valve seat has a concave curvature overall in a side view in the direction of the longitudinal extent, along which the sealing surface extends.
  • the valve seat is thus curved in a concave manner in its entirety, so that the concave curvature extends over the entire valve seat in a side view.
  • Such a shape of the sealing surface results, for example, from the fact that the in particular tubular valve seat is cut by an imaginary cylinder, which extends perpendicularly to the longitudinal extent of the tubular valve seat, i.e. perpendicularly to the axial extent of the valve seat and the valve opening, so that the sealing surface ultimately extends along the Outer surface of the imaginary cylinder runs.
  • the valve element is thus curved in only one direction in the frame state.
  • the advantageous shape of the sealing surface or the valve seat means that the valve element, in that it is in the resting state, is sealing on the sealing surface over the entire area or at the edge rests, and thus also extends in the side view in a cylinder-concave shape and is thus already further pre-bent on two diametrically opposite sides spaced from the attachment point in the direction of actuation than in a section between the two end regions.
  • the valve element thus detaches quickly and with little effort at the outer end regions, and thus at two points from the valve seat, as a result of which the back pressure acting on the user is minimized.
  • the sealing surface extends concavely only parallel to the transverse extension of the valve seat.
  • the course of the sealing surface results in the concave curvature of the valve seat. This ensures that the edge of the valve element rests securely on the sealing surface in the idle state and that the seal is permanently ensured over the entire circumference of the valve element. This ensures that the valve element closes securely during an inhalation process and that even if there is no air flow, for example if the valve device is held by the user in such a way that the valve element lies below the valve seat, the valve element cannot become detached from the valve seat under its own weight .
  • the fastening point is arranged relative to the sealing surface in such a way that a prestressing of the valve element always acts on the sealing surface.
  • the fastening point in the valve opening is in front of the sealing surface, seen in the direction of flow. As a result, the valve element is always kept prestressed between the fastening point and the sealing surface.
  • an axial distance between the sealing surface and the fastening point changes constantly over the course of the sealing surface around the valve opening. This avoids steps or stepped transitions in the course of the sealing surface and ensures that the disk-shaped valve element rests securely on the sealing surface. This is achieved in particular by a sufficiently large radius of the concave curvature.
  • the curvature preferably has, at least in sections, a radius that is larger than a radius of an inside or an outside of the valve seat. This ensures that the sealing surface has a continuous profile, particularly in the areas that have the greatest axial distance from the fastening point.
  • the larger the radius of curvature is selected the flatter the cone shape of the valve seat is, which ensures a constant progression of the valve surface in a simple manner.
  • the Diameter or radius of the cylinder intersecting the valve seat is larger, in particular significantly larger, than the diameter or radius of the valve seat.
  • the carrier body has at least one, preferably several, webs projecting radially into the valve opening, and the respective web forms the fastening point at its end lying in the valve opening.
  • the attachment point is thus positioned in the valve opening by the web or webs and the central mounting or attachment of the valve element to the carrier body is made possible in a simple manner.
  • the multiple webs are particularly preferably connected to one another in one piece at their ends and form the fastening point in the connection area, which in particular has a support for the valve element.
  • the valve element can thus be placed on the valve seat and the attachment point. Due to the above-mentioned advantageous axial distance between the fastening point and the sealing surface, the valve element does not rest on the fastening point in the preassembled state due to its internal stress, unless it is pressed into the valve opening in the direction of the fastening point by overcoming the internal stress.
  • the valve device also has a cover fastened to the carrier body and covering the valve element at a distance, which has a retaining projection protruding in the direction of the valve disk, which presses the valve disk against the support of the fastening point.
  • the cover thus covers the valve element so that it is protected from external influences.
  • the distance between the cover and the valve element is selected in such a way that the valve element is lifted by the sealing surface when it is actuated, i.e. when an exhaled air flow occurs that exerts a sufficiently high pressure on the valve element in the valve opening, without being prevented from doing so by the cover to become.
  • the retaining projection ensures that the valve disc is pressed against the support when the cover is installed and that the prestress on the valve element for tight contact with the valve seat or the sealing surface is thus reliably achieved.
  • the central arrangement of the attachment point ensures that the valve element is subjected to a uniform force, which, among other things, also ensures a long service life.
  • the holding projection has a centering pin or mounting pin at its end facing the support, which has a central holding opening Valve disk penetrates and is inserted into a centering pin receptacle or mounting pin receptacle in the support of the attachment point.
  • the centering pin and the centering receptacle ensure that the retaining projection is optimally aligned with respect to the attachment point in order to achieve the desired contact pressure.
  • the fact that the holding projection with the centering pin reaches through the valve disk permanently ensures an optimal arrangement of the valve disk on the valve seat or the carrier body. Furthermore, this ensures simple assembly, which in particular ensures error-free joining of the individual parts of the valve device.
  • the retaining projection and/or the centering pin preferably have a circular cross section.
  • the optional circular cross-section of the centering pin ensures that the centering pin and centering pin holder can be easily brought together.
  • the circular cross-section of the retaining projection and in particular also the fastening point or its support for the valve disk ensures that the valve disk or the circular disk-shaped valve element is subjected to a uniform force application.
  • the circular cross section also means that the valve disc can be arranged in any orientation at the attachment point, a predetermined orientation of the valve disc in relation to the attachment point is omitted, which considerably simplifies assembly and can also be automated, for example.
  • the centering pin is inserted into the centering pin receptacle with radial play and is in axial contact with an axial stop of the centering pin receptacle.
  • the depth of insertion of the centering pin into the centering pin receptacle is thus limited by the axial stop. Because the centering pin is also inserted radially with play, it is ensured that the centering pin achieves the desired axial contact with the axial stop of the centering pin receptacle during assembly of the valve device without, for example, jamming or tilting in the centering pin receptacle beforehand.
  • the deformation of the valve element or the valve disk due to the assembly of the valve device can also be easily limited or adjusted to a predetermined value.
  • the valve disc is held between the holding projection and the support, the distance between the holding projection and the support being defined by the insertion depth of the centering pin. This also defines the position of the valve disk between the support and the retaining projection and thereby the relative position of the valve disk in the area of the support to the sealing surface (i.e. seen in the axial direction) or the preload of the valve disk in the valve device.
  • the The insertion depth of the centering pin is selected in such a way that the valve disc in the area of the support is arranged at an axial distance from the sealing surface, in particular also at an axial distance from the lowest point of the valve seat, seen in the axial direction, in order to preload and deform the valve element according to the concave shape of the valve seat to reach.
  • the carrier body and the cover form at least one plug-in connection arranged radially outside of the valve seat.
  • the carrier body and the cover are thus preferably connected in addition to the connection of the holding projection to the fastening point outside of the valve seat or the valve element by the plug-in connection, preferably non-positively, in a form-fitting manner, in order to securely hold the cover on the carrier body and in particular the one acting on the valve element
  • the plug-in connection preferably non-positively, in a form-fitting manner, in order to securely hold the cover on the carrier body and in particular the one acting on the valve element
  • three plug-in connections are formed between the carrier body and the cover, which are distributed over the circumference of the valve element or the valve seat.
  • the respective plug-in connection preferably has a retaining pin protruding axially from the carrier body or the cover and a retaining opening formed in the cover or the carrier body, the retaining pin being inserted, in particular pressed, into the retaining opening.
  • a plurality of plug-in connections are formed between the carrier body and the cover and are distributed around the valve opening.
  • the plug-in connections are particularly preferably distributed unevenly around the valve opening, so that an asymmetry arises.
  • the asymmetry ensures that incorrect assembly of the cover on the carrier body is reliably prevented.
  • the asymmetrical arrangement also allows the assembly to be automated, since the arrangement of the plug connections, in particular the retaining pins and/or the retaining opening, is also automatically recognized on the respective individual part, thereby ensuring correct alignment of the individual parts with one another.
  • the valve seat is particularly preferably designed as a sealing web protruding axially from the carrier body.
  • the valve seat thus protrudes axially in particular from the carrier body, as a result of which the formation of the sealing surface can be implemented cost-effectively.
  • At least one protective web is formed radially spaced from the valve seat and extends in particular parallel to the sealing web.
  • the valve disk is further protected against external influences by the protective web, which is not directly operatively connected to the valve disk, which means that it is also located at a radial distance from the valve disk. It is only when the valve disk is actuated that it lifts up in some areas above the protective bar in order to facilitate the exhalation process. In the non-actuated state, it lies below the protective bar and is therefore not visible, for example, in a side view.
  • the carrier body has an insertion section, which is formed in particular on the side of the carrier body facing away from the sealing seat, and which can be inserted or inserted into an opening of the mask body for aligning and/or fastening the valve device on the mask body.
  • the plug-in section thus represents a fastening means for the carrier body, by means of which the carrier body can be arranged and in particular aligned on the mask body of the breathing mask.
  • the plug-in section is manufactured with an outer contour that corresponds to the inner contour of the opening of the mask body, so that a form-fitting connection between the mask body and the carrier body can be implemented.
  • the insertion section particularly preferably has a connecting ring which can be inserted into the opening, or a plurality of latching elements which are distributed over the circumference and which are separated from one another as viewed in the circumferential direction by longitudinal slots.
  • a clamping ring can be pushed onto the plug-in section or plug-in ring and held in a form-fitting manner on the plug-in section, for example by latching lugs of the connecting ring or the latching elements, in such a way that material of the mask body is clamped between the clamping ring and the carrier body and the carrier body or the valve device is thereby fastened to the mask body .
  • the cover has at least one peripheral wall section of a peripheral wall which is designed to rest on the mask body at its free end.
  • the cover is thus supported on the mask body in the fitted position by the peripheral wall section.
  • valve device can be mounted or mounted on the breathing mask in such a way that the free end of the peripheral wall section is pressed onto the mask body in such a way that it deforms the mask body in certain areas and forms a depression on its outside, which is advantageous when moisture is introduced into the mask body works.
  • the cover forms at least two flow openings which are diametrically opposite one another in the transverse extension of the valve seat.
  • the through-flow openings are thus assigned to that area of the valve element or the disc valve which is the first to detach from the sealing surface during an exhalation process.
  • air is blown out through the respectively raised valve section directly through the through-flow opening of the cover associated therewith into the area surrounding the breathing mask. This ensures a particularly low back pressure for the user.
  • the cover particularly preferably forms the respective through-flow opening between itself and the mask body.
  • the cover has an opening or an opening in its casing wall or peripheral wall for each of the through-flow openings.
  • the breathing mask according to the invention with the features of claim 18 is characterized by the inventive design of the valve device.
  • the valve device is preferably arranged on the mask body in such a way that the longitudinal extension of the valve device, in particular of the carrier body, extends in the longitudinal extension of the mask body, i.e. in particular parallel to a center line of symmetry of the mask body, which extends through a nose and mouth area of the mask body , so that it detaches the valve element from the sealing surface to the left and right of an imaginary line connecting the nose and mouth when the breathing mask is used as intended.
  • both a low air resistance is achieved and the formation of droplets on the inside of the breathing mask is avoided.
  • the carrier body has an insertion section, as already described above, which is inserted into the opening of the mask body for aligning and/or fastening the valve device.
  • the valve of the opening of the mask body is advantageously assigned and the orientation and arrangement of the valve device on the Mask body secured.
  • the cover is pressed onto at least one peripheral wall section on the outside of the mask body, in particular in such a way that there is a depression on the mask body along the free end of the peripheral wall section. As a result, moisture that condenses, for example, on the inside of the cover facing the valve element, is introduced into the mask.
  • the peripheral wall section is arranged in particular on an underside of the valve device, so that condensate that forms on the cover is introduced into the mask at the lower end without penetrating the mask.
  • the cover preferably has through-flow openings that are diametrically opposite one another in the transverse extension of the valve seat, so that the respective through-flow opening is assigned to the area of the disc valve that is axially the greatest distance from the support and is therefore the first to open when the user exhales.
  • the through-flow openings lie to the left and right of an imaginary line connecting the mouth and nose when used as intended.
  • the through-flow openings are particularly preferably formed between the cover and the mask body, so that an edge delimitation of the respective through-flow opening is limited by the cover on the one hand and the mask body on the other hand.
  • the respective through-flow opening is formed entirely in a peripheral wall section of the cover.
  • FIG 1 shows a perspective view of an advantageous breathing mask 1 for a human user.
  • the breathing mask 1 has a mask body 2 which is designed to cover the mouth and nose of the user and to lie sealingly on the user's face with a circumferential sealing edge 3 .
  • the mask body 2 is designed in one or more layers, in particular to ensure a dimensionally stable design of the mask body 2 and to provide a filter function for the mask body 2 . If the mask body 2 lies tightly against the user's face so that it covers the user's mouth and nose, the mask body serves to filter the ambient air inhaled by the user.
  • the mask body 2 has a valve device 4 which has an opening 5 (in figure 2 shown) fills out.
  • the valve device 4 is embodied as an exhalation valve, so that it opens or enables a flow-through process when a user breathes out and closes when the user breathes in. This ensures that when inhaling, the outside air can only reach the user through the mask body 2 or through the filtering and air-permeable material of the mask body 2, and that when exhaling, the air escapes from the breathing mask 2 with reduced resistance by opening the valve can. This ensures that the user is comfortable to wear, which also allows the breathing mask 1 to be worn over a longer period of time without any problems.
  • the valve device 1 which is explained in more detail below, has the advantage that it offers particularly low resistance during an exhalation process and also effectively prevents the formation of droplets on the inside of the breathing mask 1.
  • FIG 2 shows the valve device 4 in a simplified longitudinal sectional view according to line AA figure 1 , i.e. in a longitudinal section.
  • the valve device 4 has a carrier body 6 , a cover 7 and a valve element 8 .
  • the valve device 4 can in particular be preassembled and then fastened to the mask body 2 .
  • the individual parts of the valve device 4, i.e. the carrier body 6, the cover 7 and the Valve element 8 is preferably made of a plastic material, the materials of the individual parts can also differ from one another.
  • FIG 3 shows the support body 6 of the valve device 4 in different views.
  • the support body 6 is in particular a single part made of plastic, which has a substantially circular outer contour and a valve opening 9 in the middle, which is also circular according to the present embodiment.
  • Figure 3A shows the carrier body 6 in a perspective view.
  • the carrier body 6 has a plate-shaped base section 10 through which the valve opening 9 extends axially, so that the valve opening 9 can also be flowed through axially.
  • Figure 3B shows the carrier body 6 in a side view according to arrow 11 in Figure 3A .
  • a plurality of locking elements 13, which surround the valve opening 9 on the circumference, protrude axially, are designed to be elastically deformable and each have a radially projecting locking lug 14 on their outside.
  • the latching elements 13 are thus designed in the manner of bending elements, with the latching elements 13 optionally having an outer diameter at the level of the latching lugs 14 which is larger than the inner diameter of the opening 5 in which the valve device 4 is fastened.
  • the carrier body 6 is pushed in with the latching elements 13 in such a way that the latching elements 13 are elastically deformed radially inwards in order to penetrate the opening 5 of the mask body 2, and then, due to their inherent elasticity, push radially outwards in order to axially compress the mask body 2 to intervene.
  • the outer diameter of the locking elements 13 in the area of the locking lugs 14 is selected in such a way that it is smaller than the inner diameter of the opening 5, so that the carrier body 6 can be inserted into the opening 5 with the locking elements 13 without resistance, as shown in FIG figure 2 shown. Then a particularly elastically deformable clamping ring 15 is pushed over the locking elements 13 on the outside in order to engage behind the locking lugs 14 . This also ensures that the carrier body 6 is securely locked on the mask body 2 .
  • the latching elements 13 are not separated from one another by slots 16 that extend axially, as in the present exemplary embodiment, but are formed in one piece as a closed connecting ring.
  • the latching elements 13 or the connecting ring form an annular insertion section 13', which is inserted into the opening 5 of the mask body for alignment and/or attachment of the valve device 4 to the mask body.
  • Figure 3C shows the carrier body in a plan view.
  • the carrier body 6 has a longitudinal extent L and a transverse extent Q, with the longitudinal extent corresponding to the cutting line AA in the assembled state and the transverse extent being perpendicular thereto, with the longitudinal extent and transverse extent each passing through the center point of the carrier body 6 and the valve opening 9, as shown in FIG Figures 3A and 3C shown.
  • the side view according to arrow 11 as shown in Figure 3B is shown is therefore a view in the longitudinal extension L or perpendicular to or on the transverse extension Q.
  • the carrier body 6 on the base section 10 has a sealing web 17 which extends in the shape of a circular ring and which surrounds the valve opening 9 and is in particular arranged coaxially thereto.
  • the sealing web 17 protrudes axially from the base body 10 and forms a valve seat 18 for the valve element 8 already mentioned.
  • the valve seat 8 is concave overall, so that it has a curvature with the radius R1.
  • the sealing web 17 On its free end face, the sealing web 17 has a sealing surface 19 which corresponds to the intersection of the sealing web 17 with an imaginary cylinder with the radius R1, whose center axis or axis of rotation is aligned in the longitudinal direction according to the arrow 11.
  • the sealing surface 19 thus extends concavely only parallel to the transverse extension Q of the valve seat 18, the sealing surface having a course in the circumferential direction due to the radius R1, which is significantly larger than the radius R2 of the annular shape of the sealing web 17, at which the distance of the sealing surface 19 changes constantly along the course of the sealing surface 19 to a fastening point 20 lying in the middle of the valve opening 9 .
  • the base body 10 has several webs 21 , in this case three, which protrude radially inwards into the valve opening 9 and which lead from the inside of the valve opening 9 to the central attachment point 20 .
  • the webs 21 are each formed in one piece with the base body 10 and with the fastening point 20 .
  • the attachment point 20 is cup-shaped, with a free end face that forms a support 22 and with a recess arranged in the support 22 that forms a centering pin receptacle 23 .
  • the webs 21 are distributed in particular uniformly over the circumference of the valve opening 9 .
  • Figure 3D shows a sectional view of the carrier body 6 in the transverse extension Q, as in FIG Figure 3C shown. It can be seen here that the cup-shaped fastening point 22 lies in the center of the valve opening 9 and ends at a distance axially from the sealing surface 19 of the valve seat 18 . Also in the sectional representation of Figure 3D the concave shape of the valve seat 18 can be seen. The smallest axial distance x between the support 22 of the attachment point 20 and the sealing surface 19 corresponds to the value x 1 . The greatest axial distance x 2 is between the support 22 of the attachment point 20 and the sealing surface 19 in - in the longitudinal section of Figure 3D seen - the very outer area of the sealing web 17.
  • the distances x 1 and x 2 are selected in particular depending on the embodiment of the valve element 8, in particular depending on its elasticity, which result from the selected material and the shape of the valve element 8, in order to ensure that the valve element 8 fits tightly on the To ensure sealing surface 19 permanently. The force with which the valve element 8 is pretensioned by the cover 7 is also taken into account.
  • Figure 3E shows an enlarged detailed sectional view of the carrier body in the area of the sealing seat 18.
  • Figure 3F shows a sectional representation of the carrier body 6 according to the longitudinal section or the longitudinal extension L.
  • the concave configuration of the valve seat 17 cannot be seen.
  • the distance x 1 to the support 22 it is also shown in Figure 3F the distance x 1 to the support 22.
  • FIG 4 shows a perspective view of the cover 7 with a view of the underside facing the carrier body 6 .
  • the cover 7 has a presently circular base section 24, from the outer edge of which an in particular peripheral jacket wall 25 protrudes in the direction of the carrier body 6, the height of the jacket wall 25 being of different sizes as seen over the circumference.
  • the height of the jacket wall 25 is selected in particular as a function of the mask body 2 on which the valve device 4 is attached, so that the jacket wall 25, in particular at two diametrically opposite wall sections 25' with a greater height on the mask body 2, has a free end of the respective casing wall section 25', and ends at two diametrically opposite wall sections 25" with a lower height, which lie between the first-mentioned wall sections, at a distance from the mask body 2 in order to form a flow opening 26 between the mask body 2 and the cover 7, such as for example in the side view of the breathing mask 1 in figure 5 shown.
  • the through-flow openings 26 are preferably diametrically opposite one another in the transverse extension of the carrier body 6 , so that the through-flow openings 26 are assigned to the area of the valve seat 17 that is axially at the greatest distance from the support 22 . This ensures that when the valve is actuated by an exhalation process, the exhaled air reaches the through-flow opening 26 directly through the raised valve element 8 and can thus be blown out of the valve device 4 with little counter-pressure.
  • the cover 7 only has the wall sections 25'.
  • the free end of the respective wall section 25' is pressed into the mask body 2 in such a way that a recess is formed in the outside of the mask body 2.
  • the cover 7 has an axially protruding retaining projection 27 in the center of the base section 24 .
  • the retaining projection 27 has a centering pin 28 with a reduced diameter.
  • the retaining projection 7 and the centering pin 28 are each provided with axially extending and radially projecting stiffening ribs 29,30.
  • the outer diameter of the retaining projection 27 or the stiffening ribs 28 is chosen to be larger in this case such that the retaining projection 27 is opposite the attachment point 29 with its front edge of the support 22 .
  • the centering pin 28 is inserted into the centering pin receptacle 23 in particular with radial play, so that the free end of the centering pin 28 rests securely on the bottom of the centering pin receptacle, in particular in the form of a cup.
  • the bottom of the centering pin receptacle forms an axial stop 23 ′ for the centering pin 28 , which limits the penetration depth of the centering pin 28 in the centering pin receptacle 23 .
  • This ensures that the valve disk or the valve element 8 is only deformed by the end wall of the retaining projection 27 in the direction of the support 22 until the centering pin 28 reaches the axial stop 23'. This ensures a limited pre-deformation of the valve disk or the valve element 8 and thus a defined contact pressure of the valve element 8 on the sealing surface 19 during assembly in a simple manner.
  • the disk-shaped valve element 8 has an opening 31 in the middle, which in particular is also circular, as in FIG figure 2 shown.
  • the inner diameter of the opening 31 is larger than the outer diameter of the centering pin 28, so that the retaining projection 27 with the centering pin 28 penetrates the valve disc or the valve element 8 with a radial distance or with radial play, so that the valve element 8 in the assembled state, as in FIG figure 2 shown, held axially between the holding projection 28 and the support 22, in particular braced or clamped.
  • the inner diameter of the opening 31 is smaller than the outer diameter of the retaining projection 27 or the stiffening ribs 29.
  • valve element 8 is thus prestressed axially in such a way that it is flat on the edge, i.e. with its outer edge the sealing surface 19 of the valve seat 18 rests, as exemplified in figure 2 shown.
  • plug-in connections 32 are formed between the cover 7 and the carrier body 6 .
  • Each of the plug connections 32 has a retaining pin 33, which in the present case protrudes axially from the base section 10 of the carrier body 6 on the upper side 16, and a retaining opening 34 into which the retaining pin 33 is pressed.
  • the holding openings 34 are advantageously formed in holding domes 35 protruding from the base section 24 of the cover 7 in the direction of the carrier body 6 .
  • the plug-in connections 32 which ensure a non-positive connection between the cover and the carrier body 6, ensure that the cover 7 does not become detached from the carrier body 6 in an undesired manner. In addition, it is ensured that the desired pressing force of the valve element 8 is permanently guaranteed. Thanks to the advantageous plug-in connections 32, the base section 24 of the cover 7 is kept at such a distance from the carrier body 6 and the valve element 8 that the valve element 8 can be elastically deformed sufficiently to open a flow path, as shown in FIG figure 2 indicated by dashed lines.
  • the advantageous alignment and design of the carrier body 6 ensures that the area with the greatest distance x 2 between the sealing surface 19 and the support 22 is in the area of the flow openings 26, so that a direct flow path from the valve element 8 through the flow opening 26 is guaranteed.
  • valve seat 18 ensures that the advantageous concave pre-shaping of the valve element 8, the valve element 8 at his der Flow opening 26 facing sections or end areas deformed even at low air pressure inside the breathing mask 1 and detaches from the sealing surface 19 to release the flow path. This offers a particularly low resistance of the valve device 4 when exhaling.
  • a protective web 36 is preferably associated with the valve seat 18 or the sealing web 17, as for example also in the sectional view of FIG Figure 3D or 3E shown, which is spaced radially outwards from the sealing web 17 and protrudes further axially from the base section 10 than the sealing web 17.
  • the protective web 36 preferably runs parallel to the sealing web 18, in particular also following the concave shape of the valve seat 18 , as in the Figures 3D and 3E shown.
  • the height of the protective web 36 is selected such that it protrudes beyond the valve element 8 resting on the sealing web 17 in the unactuated state, so that the valve element 8 in a side view of the valve device 4, such as in the side view of the breathing mask 1 in FIG figure 5 shown, is not visible and is protected by the protective web 36 from unwanted damage.
  • the protective web 36 either extends continuously around the sealing web 17, thus also forming a closed annular shape, or it is interrupted in sections, as in the present exemplary embodiment, in particular in FIGS Figures 3A and 3C shown.
  • the carrier body 6 has an outer contour that deviates from a circular shape, which according to the present exemplary embodiment is characterized by a straight edge section 37, as shown in FIG Figure 3C shown is formed.
  • the carrier body 6 receives a geometric or mechanical reference that offers simple alignment and sorting and thus mechanical processing of the carrier body 6 during assembly, storage and transport of the carrier body 6 and the valve device 4 .
  • the plug-in connections 32 are not evenly distributed over the circumference of the valve opening 9, but unevenly. This also enables machine processing, in particular machine alignment of the carrier body and the cover to one another, which enables a simple machine assembly process, as a result of which the present breathing mask 1 or the valve device 4 can also be produced fully automatically in large numbers.
  • valve element 8 When used as intended, the valve element 8 opens to the left and right or to the side in relation to an imaginary line connecting the mouth and nose of a user, as in figure 1 represented by arrows 38 indicating airflow of an expiratory event.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP20199306.0A 2020-09-30 2020-09-30 Masque respiratoire pourvu de soupape à disques Withdrawn EP3978081A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20199306.0A EP3978081A1 (fr) 2020-09-30 2020-09-30 Masque respiratoire pourvu de soupape à disques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20199306.0A EP3978081A1 (fr) 2020-09-30 2020-09-30 Masque respiratoire pourvu de soupape à disques

Publications (1)

Publication Number Publication Date
EP3978081A1 true EP3978081A1 (fr) 2022-04-06

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EP (1) EP3978081A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08332239A (ja) * 1995-06-08 1996-12-17 Koken Kk 使い捨て防じんマスク
WO1999021618A1 (fr) * 1997-10-24 1999-05-06 Scott Technologies, Inc. Masque respiratoire et son procede de fabrication
WO2008092052A2 (fr) * 2007-01-25 2008-07-31 Louis M. Gerson Co., Inc. Valve de fluide dotée d'un montant central
US20090151728A1 (en) 2005-10-11 2009-06-18 Mcconnell Alison Kay Respiratory Protection Device
USRE43289E1 (en) 1995-08-04 2012-04-03 3M Innovative Properties Company Uni-directional fluid valve
WO2018052874A1 (fr) 2016-09-16 2018-03-22 3M Innovative Properties Company Soupape d'expiration et appareil respiratoire comprenant ladite soupape d'expiration
EP1399222B1 (fr) 2001-06-25 2018-06-20 3M Innovative Properties Company Soupape de respiration

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08332239A (ja) * 1995-06-08 1996-12-17 Koken Kk 使い捨て防じんマスク
USRE43289E1 (en) 1995-08-04 2012-04-03 3M Innovative Properties Company Uni-directional fluid valve
WO1999021618A1 (fr) * 1997-10-24 1999-05-06 Scott Technologies, Inc. Masque respiratoire et son procede de fabrication
EP1399222B1 (fr) 2001-06-25 2018-06-20 3M Innovative Properties Company Soupape de respiration
US20090151728A1 (en) 2005-10-11 2009-06-18 Mcconnell Alison Kay Respiratory Protection Device
WO2008092052A2 (fr) * 2007-01-25 2008-07-31 Louis M. Gerson Co., Inc. Valve de fluide dotée d'un montant central
WO2018052874A1 (fr) 2016-09-16 2018-03-22 3M Innovative Properties Company Soupape d'expiration et appareil respiratoire comprenant ladite soupape d'expiration

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