EP4185391A1 - Regulator assembly for an aircrew breathing mask - Google Patents
Regulator assembly for an aircrew breathing maskInfo
- Publication number
- EP4185391A1 EP4185391A1 EP21749134.9A EP21749134A EP4185391A1 EP 4185391 A1 EP4185391 A1 EP 4185391A1 EP 21749134 A EP21749134 A EP 21749134A EP 4185391 A1 EP4185391 A1 EP 4185391A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axial
- mode selection
- selection button
- cover
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000029058 respiratory gaseous exchange Effects 0.000 title abstract description 9
- 230000000241 respiratory effect Effects 0.000 claims description 36
- 230000000295 complement effect Effects 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000033228 biological regulation Effects 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000000284 resting effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 8
- 239000003570 air Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B7/00—Respiratory apparatus
- A62B7/14—Respiratory apparatus for high-altitude aircraft
-
- 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
- A62B7/00—Respiratory apparatus
- A62B7/02—Respiratory apparatus with compressed oxygen or air
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B9/00—Component parts for respiratory or breathing apparatus
- A62B9/02—Valves
Definitions
- This disclosure relates to a regulator assembly for an aircrew member's breathing mask.
- such a regulation assembly for a respiratory mask of an aircraft crew member comprises:
- a mode selection button capable of being moved between at least a first position (EMER), a second position (100%) and a third position (N), the second position (100%) being positioned between the first position ( EMER) and the third position (N),
- a regulator intended to be supplied by a source of respiratory gas and suitable for supplying a respiratory cavity at least in the following three operating modes:
- the regulator supplies the respiratory cavity as long as the pressure in the respiratory cavity is not greater than a first pressure relative to the ambient pressure
- the regulator supplies the respiratory cavity as long as the pressure in the respiratory cavity is not greater than a second pressure relative to the ambient pressure, the first pressure being greater than the second pressure
- the regulator supplies the respiratory cavity with respiratory gas diluted with air
- the first position "EMER” corresponds to the “EMERGENCY” mode. It is to be selected in case of smoke or fire in the cockpit.
- the second position “100%” corresponds to the “100%” mode. It provides protection against hypoxia.
- the third position “N” corresponds to the "NORMAL” mode. It allows to limit the oxygen consumption in preventive port or on a landing in descent profile.
- the select button is by default in the second position 100%.
- the second 100% position is arranged centrally between the first position and the third position.
- the mode selection button is not visible to the user when the mask is worn.
- the selection button is asymmetrical to allow the user to distinguish the direction of rotation leading to the "EMERGENCY" mode and to the “NORMAL” using touch.
- the selection button also has side markings to allow verification of the selected mode by a third party.
- current respiratory masks include means providing information on the selected mode of operation to the user, thanks to the asymmetry of the button, and to third parties, using the side markings.
- the purpose of this disclosure is to propose a set of regulation capable of avoiding accidental selection of the “NORMAL” mode instead of the “EMERGENCY” mode.
- the purpose of this disclosure is to increase the level of safety of oxygen mask regulation assemblies by preventing mishandling of the mode selection button.
- the invention relates to a regulator assembly as described above in which the mode selection button comprises a base pivotally mounted on the support with respect to an axis of rotation, and a cover carried by the base; said axis of rotation being perpendicular to the support and extending in an axial direction; said cover being movable in the axial direction relative to the base between a locking position of the mode selection button and an unlocking position of the mode selection button, the locking position locking the rotation of the mode selection button from the second position to the third position, the unlocking position authorizing rotation of the mode selection button from the second position to the third position.
- the present disclosure makes it possible to mechanically prevent the selection of an incorrect mode of operation.
- the support comprises at least one axial projection
- the cover comprises a bottom, and at least one axial wall carried by the bottom, said at least one axial wall being capable of coming into abutment against said at least one projection axial when the cover is positioned in the locking position and the mode selection button is pivoted from the second position to the third position; said at least one axial wall being capable of pivoting away from said at least one axial projection when the cover is positioned in the unlocked position and the mode selection button is pivoted from the second position to the third position.
- the base comprises a plate extending parallel to the support; the bottom resting against the plate when the mode selection button is in the locking position; the base comprises a sliding device and the cover comprises a complementary sliding device cooperating with the sliding device to allow the cover to move relative to the base in the axial direction between the locking position and the unlocking position.
- the cover is capable of being pulled in a direction directed outward from the mode selection button to bring the cover into the unlocked position; and wherein said axial wall is able to pivot above said at least one axial projection when the cover is positioned in the unlocked position and the mode selection button is pivoted from the second position to the third position.
- said at least one axial wall borders only part of a peripheral edge of the bottom.
- the cover has two axial walls parallel to each other and parallel to a median plane, said median plane containing the axis of rotation.
- the support comprises an additional axial projection disposed on one side of said median plane, said axial projection being disposed on the other side of said median plane, the axial projection being positioned such that the axial wall is disposed above of the additional axial projection when the mode selection button is positioned in the third position.
- said plate has only two peripheral edges, at least one opening being arranged between the two peripheral edges, and in which said at least one axial wall of the cover covers said at least one opening; said at least one axial projection being able to pass through said at least one opening, when the cover is in the unlocked position and the mode selection button is pivoted towards the third position.
- the mode selection button comprises at least one elastic element capable of acting between the base and the cover to hold the cover in the locking position.
- the sliding device comprises at least one axial hole provided in said plate, and in which the complementary sliding device comprises at least one axial section extending perpendicular to the bottom, said axial section sliding in said axial hole, when the cover is moved from the locking position to the unlocking position.
- the complementary sliding device comprises at least one support cap adapted to be fixed to a free end of said at least one axial profile, said axial profile having a diameter; the support cap having a diameter greater than the diameter of the axial profile, and wherein said elastic element bears on the one hand against said at least one support cap and on the other hand against said plate.
- said at least one axial profile has at least three branches which intersect, and in which said at least one support cap comprises lugs capable of being wedged between said branches of said at least one axial profile.
- FIG. 1 is a perspective view of a respiratory mask comprising a regulation assembly according to the present invention
- FIG. 2 is an exploded perspective view of the mode selection button and the support of the regulation assembly according to the invention
- FIG. 3 is a perspective view from one side of the mode selector button and bracket, in a locked position
- FIG. 4 is a perspective view from another side of the mode selector button and the support, in an unlocked position
- FIG. 5 is a cross-sectional view of the selection button and of the support, according to a section plane V-V illustrated in FIG. 4;
- FIG. 6 is a top view of the mode selection button, when the mode selection button is the third "N" position;
- FIG. 7 is a sectional view of the mode selector knob and the bracket, when the mode selector knob is in the third "N" position; the cutting plane being perpendicular to an axis of rotation Z of the mode selection button; and
- FIG. 8 is a perspective view from one side of a mode selector button, in an unlocked position
- FIG. 1 illustrates a breathing mask 100 arranged in a pressurized cabin 8 of a commercial aircraft intended to transport crew members and generally also passengers.
- a device pressurizes the cabin so that it is not lower than a pressurization pressure, generally corresponding to an altitude of between 1,500 meters and 2,400 meters.
- a pressurization pressure generally corresponding to an altitude of between 1,500 meters and 2,400 meters.
- the pressure in the cabin is substantially equal to the pressure outside the cabin and decreases, until said pressurization pressure is reached.
- the pressure in the cabin is then kept constant until the pressure outside becomes lower than the pressurization pressure.
- the respiratory mask aims to allow its user to have sufficient oxygen and to be protected from harmful substances in the event of incidents, such as depressurization, presence of toxic gases or the like, preventing the occupants of the cabin from breathing normally. .
- the respiratory mask 100 comprises a face cover 2 and a regulation assembly 1.
- the oronasal face cover 2 is intended to be applied in a substantially sealed manner to the face of a user around his nose and his mouth.
- the oronasal face cover 2 has a respiratory cavity 4 in which the user breathes.
- the regulation assembly 1 comprises a support 10, a regulator, and a mode selection button 20 pivotally mounted on the support 10 around an axis of rotation Z.
- the axis of rotation Z is perpendicular to the support 10 and s extends along the axial direction A.
- the term “axial” is defined with respect to the axis of rotation Z in the present application, except when another axis is explicitly mentioned.
- the axis of rotation Z and the axial direction A are coaxial and merged.
- the support 10 comprises a box 13 and a plate 14 arranged on the box 13 and able to close it.
- the housing 13 is provided with a breathing gas supply port intended to receive the end of a pipe to connect the regulator to a source of breathing gas essentially containing oxygen.
- the regulator is housed in the box 13. It operates according to three operating modes.
- the first mode of operation called “EMERGENCY” mode
- the regulator supplies the respiratory cavity 4 only with respiratory gas until a slight overpressure is reached in the respiratory cavity 4 relative to the ambient pressure of the air in the cabin, generally this overpressure is between 3 mbar and 30 mbar.
- this overpressure value is hardly felt by the user.
- the overpressure requires a substantial additional effort from the user to breathe, which is quickly felt by the user.
- the regulator supplies the respiratory cavity 4 only with respiratory gas until it substantially reaches the ambient pressure.
- it is generally useful to plan to stop the supply to the respiratory cavity before the respiratory cavity reaches ambient pressure, so that there is a very slight depression (a few tenths of a mbar to a few mbar) in the respiratory cavity 4.
- the third respiratory mode differs from the second respiratory mode in that the respiratory cavity 4 is supplied with respiratory gas diluted with air, generally ambient air, the proportion of which is usually a function in particular of cabin pressure 8.
- the mode selection button 20 has a first position indicated “EMER” and commanding the regulator to operate in the first mode.
- the mode selection button 20 has a second position indicated “100%” and commanding the regulator to operate in the second mode.
- the mode selection button 20 has a third position indicated “N” and commanding the regulator to operate in the third mode.
- the axis of rotation Z of the selection button extends substantially vertically when the user holds his head vertically, so that the mode selection button 20 extends under the housing 13.
- the mode selection button 20 could be placed differently, in particular on the front of the case 13 and/or with an axis of rotation extending substantially horizontally.
- the three positions of the mode selection button are discrete positions materialized by notches.
- a marker 11a is placed in the center of the width of the plate 14.
- a median plane M is defined. This median plane M passes through the reference 11a and through the axis of rotation Z. The median plane M is perpendicular to the support 10.
- the front face of the mode selection button has three inscriptions indicating the angular position of the mode selection button with respect to the support 10.
- the positions of the mode selection button are arranged according to an arc of a circle.
- the center of this arc of a circle is positioned on the axis of rotation Z.
- the second position indicated "100%” is located between the first position "EMER” and the third position indicated "N".
- the first position "EMER” is inscribed on one side of the median plane, hereinafter called the left side and the third position "N" is inscribed on the other side of the median plane, hereinafter called right side.
- the plate 14 comprises a hollow cylindrical body 16 extending in the axial direction A above and below the plate 14.
- the cylindrical body 16 is positioned at the center of the medium.
- the cylindrical body 16 is provided with a through hole 18.
- the plate 14 also has an axial projection 22 extending above the plate.
- the axial projection 22 has the shape of a straight block.
- the axial projection is located on the side of the median plane M opposite to the first position "EMER", that is to say on the right side.
- the axial projection 22 is positioned on the plate so as to be disposed under the axial wall 54, when the mode selection button is in the third position "N", as seen in Figure 7.
- plate 14 may also include an additional axial projection 23 extending above the plate.
- the additional axial projection 23 is located on the other side of the median plane M with respect to the side containing the axial projection 22.
- the additional axial projection 23 is positioned on the plate so as to be disposed under the axial wall 52 when the button of mode selection is in the third position “N”, as visible in FIG. 7.
- the additional axial projection has the shape of an elongated straight block to provide a larger bearing surface for the axial wall 52.
- the mode selection button 20 comprises a base 24 carried by the support 10, and a cover 48 carried by the base.
- the base 24 comprises a plate 26 extending parallel to the support 10, two peripheral flanges 28, 30 and a central crown 32 extending axially in the direction of the support.
- the plate 26 is suitable for carrying the cover 48. It comprises two axial holes 34,
- the axial holes 34 have a shape corresponding to the shape of the axial sections described below. Thus, in the embodiment represented in the figures, the axial holes 34 have the shape of a cross.
- the central ring 32 is mounted so as to be able to rotate around the cylindrical body 16.
- the central ring 32 is provided with an internal shoulder 38.
- a washer 40 of diameter greater than the diameter of the cylindrical body 16 is arranged on the cylindrical body and on a part of the internal shoulder 38.
- a fixing screw 42 is screwed into a threaded metal insert of the housing 13 The axis of the fixing screw forms the axis of rotation Z of the selection button 20.
- peripheral flanges 28, 30 extend axially in the direction of the support 10 along two opposite transverse faces of the mode selection button.
- Two openings 44, 46 are provided between the two peripheral edges. In the embodiment shown, 44.46 openings are arranged laterally to the mode selection button.
- the cover 48 comprises a bottom 50 extending parallel to the plate 14 of the support, two axial walls 52, 54, two axial sections 56, 58 and two bearing caps 60, 62.
- the bottom 50 is arranged against the plate 26 when the mode selection button 20 is in the locking position.
- the two axial walls 52, 54 extend in an axial direction A towards the support. Each axial wall borders part 59 only of the peripheral edge of the bottom.
- the axial walls 52, 54 are arranged opposite one another.
- the axial walls 52, 54 cover all of the openings 44,46 of the base when the cover 48 is in the locking position. Part of the openings 44.46 are uncovered when the cover 48 is in the unlocked position.
- the two axial walls 52, 54 are parallel to each other and parallel to the median plane M.
- the two axial walls 52, 54 are positioned laterally to the mode selection button.
- the two axial sections 56, 58 pass through the axial holes 34, 36 of the base plate.
- Each support cap 60, 62 is mounted at the free end of each axial profile.
- the diameter of each bearing cap 60, 62 is greater than the diameter of each axial section 56, 58.
- the axial sections 56, 58 have four branches 68 which intersect.
- the support caps 60, 62 have lugs 70 capable of being wedged between said branches of the axial sections.
- the mode selection button 20 also comprises two elastic elements 64, 66 capable of acting between the base 24 and the cover 48 to hold the cover in the locking position.
- An elastic element 64, 66 is arranged around each axial profile. Each elastic element 64, 66 bears against the support cap 60, 62 and the plate 26 of the base.
- the elastic elements can for example consist of compression springs.
- the axial holes 34, 36 formed in the plate 26 constitute two sliding devices.
- the axial sections 56, 58, the elastic elements 64, 68 and the support caps 60, 62 constitute two complementary sliding devices.
- the sliding devices are able to cooperate with the complementary sliding devices to allow the movement of the cover 48 relative to the base 24 in the axial direction A between the locking position and the unlocking position.
- Sliding devices and complementary sliding devices also allow the cover to be fixed to the base.
- the cover 48 comprises a single axial wall.
- the mode selection button comprises a single sliding device and a single complementary sliding device.
- the mode selection button comprises more than two sliding devices and more than two complementary sliding devices.
- the cover 48 is movable in the axial direction A relative to the base 24 between a locking position of the mode selection button 20 and an unlocking position of the mode selection button.
- the locking position is illustrated in Figures 3 and 5.
- the locking position locks the rotation of the mode selection button 20 from the second position 100% to the third position N.
- the bottom of the cover 48 is in contact of the base 24.
- the wearer of the mask pivots the mode selection button towards the third position "N"
- the axial wall 54 comes into abutment against the axial projection 22 and mechanically prevents rotation of the mode selection button.
- the wearer of the respiratory mask 100 can rotate the mode selection button from the second position “100%” to the first position “EMER” by rotation of the base-cover assembly around the axis of rotation Z .
- the wearer of the mask pulls the cover in a direction S directed along the axial direction A and towards the outside of the mode selection button.
- the bottom of the cover is at a distance from the base.
- the elastic elements 64, 66 are compressed.
- the axial walls 52, 54 are moved outward so that part openings 44, 46 are uncovered.
- the free end of the axial wall 54 is located above the axial projection 22.
- the unlocked position is illustrated in FIG. 4. If the wearer of the mask rotates the mode selection button towards the third position "N", the axial wall 54 pivots away from the axial projection 22. In particular, the axial wall 54 pivots above the axial projection 22.
- the axial projection 22 passes through the opening 44 , when the cover 48 is in the unlocked position and the mode selection button 20 pivots to the third position "N", as shown in Figure 6.
- the unlocked position authorizes rotation of the mode selection button from the second “100%” position to the third “N” position.
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20305856.5A EP3943162B1 (en) | 2020-07-24 | 2020-07-24 | Control assembly for a breathing mask for an aircraft crew member |
PCT/EP2021/070450 WO2022018169A1 (en) | 2020-07-24 | 2021-07-21 | Regulator assembly for an aircrew breathing mask |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4185391A1 true EP4185391A1 (en) | 2023-05-31 |
EP4185391B1 EP4185391B1 (en) | 2024-06-26 |
Family
ID=72046813
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20305856.5A Active EP3943162B1 (en) | 2020-07-24 | 2020-07-24 | Control assembly for a breathing mask for an aircraft crew member |
EP21749134.9A Active EP4185391B1 (en) | 2020-07-24 | 2021-07-21 | Control assembly for a breathing mask for an aircraft crew member |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20305856.5A Active EP3943162B1 (en) | 2020-07-24 | 2020-07-24 | Control assembly for a breathing mask for an aircraft crew member |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230293916A1 (en) |
EP (2) | EP3943162B1 (en) |
CN (1) | CN116133723A (en) |
BR (1) | BR112022026895A2 (en) |
CA (1) | CA3184015A1 (en) |
WO (1) | WO2022018169A1 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101932363B (en) * | 2007-11-21 | 2012-05-23 | 联合技术公司 | Breathing mask with oxygen reduced consumption |
FR3020274B1 (en) * | 2014-04-24 | 2016-04-15 | Zodiac Aerotechnics | REGULATING ASSEMBLY FOR RESPIRATORY MASK. |
-
2020
- 2020-07-24 EP EP20305856.5A patent/EP3943162B1/en active Active
-
2021
- 2021-07-21 US US18/006,714 patent/US20230293916A1/en active Pending
- 2021-07-21 EP EP21749134.9A patent/EP4185391B1/en active Active
- 2021-07-21 BR BR112022026895A patent/BR112022026895A2/en unknown
- 2021-07-21 CN CN202180061145.0A patent/CN116133723A/en active Pending
- 2021-07-21 CA CA3184015A patent/CA3184015A1/en active Pending
- 2021-07-21 WO PCT/EP2021/070450 patent/WO2022018169A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN116133723A (en) | 2023-05-16 |
EP4185391B1 (en) | 2024-06-26 |
US20230293916A1 (en) | 2023-09-21 |
EP3943162A1 (en) | 2022-01-26 |
CA3184015A1 (en) | 2022-01-27 |
BR112022026895A2 (en) | 2023-01-31 |
WO2022018169A1 (en) | 2022-01-27 |
EP3943162B1 (en) | 2023-10-25 |
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