[go: up one dir, main page]

WO2024194417A1 - Appareil de protection respiratoire à épuration d'air motorisé - Google Patents

Appareil de protection respiratoire à épuration d'air motorisé Download PDF

Info

Publication number
WO2024194417A1
WO2024194417A1 PCT/EP2024/057625 EP2024057625W WO2024194417A1 WO 2024194417 A1 WO2024194417 A1 WO 2024194417A1 EP 2024057625 W EP2024057625 W EP 2024057625W WO 2024194417 A1 WO2024194417 A1 WO 2024194417A1
Authority
WO
WIPO (PCT)
Prior art keywords
mask
air
interior space
power source
face mask
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.)
Pending
Application number
PCT/EP2024/057625
Other languages
English (en)
Inventor
Mikael KLOCKSETH
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.)
Tiki Safety AB
Original Assignee
Tiki Safety AB
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 Tiki Safety AB filed Critical Tiki Safety AB
Publication of WO2024194417A1 publication Critical patent/WO2024194417A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

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
    • A62B18/006—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 with pumps for forced ventilation
    • 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
    • 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
    • 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
    • A62B18/04—Gas helmets
    • A62B18/045—Gas helmets with fans for delivering air for breathing mounted in or on the helmet

Definitions

  • the present disclosure relates generally to PAPRs (Powered Air Purifying Respirators) and more specifically to PAPRs provided with a full -face mask.
  • PAPRs Powered Air Purifying Respirators
  • Air-purifying respirators are air filtering devices that protect against inhalation of both large and small particles by removing contaminants by filtration or absorption. They may be passive, APR, or powered, PAPR.
  • the PAPRs comprise a blower for forcing air from the surrounding atmosphere through a filter into the mask and to create a positive pressure inside the mask.
  • the PAPRs have a great advantage over APRs, because they only require a simple fit test, and they do not increase the work of breathing. PAPRs also reduce the risk of leakage into the mask caused by growth of beard, wrinkles etc since they provide a positive pressure inside the face mask.
  • the respirators may comprise a half-face mask covering only the mouth and nose of the user or a full-face mask covering also the eyes of the user.
  • the fullface masks therefore comprise a transparent visor which allows the user to see the surroundings through the mask.
  • the present disclosure relates to such full-face mask PAPRs.
  • PAPRs with a full-face mask are comfortable to use and that they do not hinder or cause fatigue to the user during use.
  • the power source normally electric batteries, adds to the weight of the PAPR which may cause fatigue and other ergonomic inconveniences in use. It is also important that the full face PAPRs provide a wide and undistorted field of view to the user.
  • US2017/0361134A1 discloses a breathing apparatus comprising a full-face mask with a visor and a flow generator with a filter for supplying filtered air through an air inlet into the mask.
  • the flow generator is arranged in a neck component which is worn at the neck of the user and connected to an air inlet on the mask.
  • the apparatus may comprise an inner mask received in the full-face mask and arranged to sealingly cover the mouth and nose of the wearer.
  • WO 2011/159233 Ai discloses a PAPR comprising a full-face mask, a blower unit and a filter unit.
  • the blower unit comprises an electric battery and is received in a compartment of the full face mask.
  • the compartment is arranged at an upper forehead region of the mask and protrudes forwardly in front a visor of the mask.
  • the full-face mask is manufactured in one piece from a transparent plastic in a one-step vacuum forming process with a single curved field of vision.
  • a face sealing may be manufactured as a separate piece by vacuum forming and cutting out a central opening adapted to the full-face mask. The face sealing is then bonded to the full-face mask. Alternatively, the face sealing may be formed integral with the fullface mask in the one-step vacuum forming process.
  • US 2010/0224190 Al discloses a modular PAPR comprising a full face mask, a canister filter and a PAPR module comprising a housing which holds a fan, a motor and a power source.
  • a modular PAPR comprising a full face mask, a canister filter and a PAPR module comprising a housing which holds a fan, a motor and a power source.
  • two canister filters are fixed to a respective PAPR module, which PAPR modules in turn are fixed to respective sides of the full face mask at respective air inlets of the mask.
  • WO 2022/079551 Al discloses a respiratory device comprising a full face mask which comprises body and a face piece.
  • the device further comprises haptic sensing means for sensing a touch pattern at the face piece or body.
  • the body may comprise a front cover module which forms a chin portion of the body and which defines a battery compartment receiving a battery for powering the haptic sensing means.
  • An object of the present disclosure is to provide an enhanced PAPR comprising a full face mask.
  • Another object is to provide such a PAPR which is ergonomically advantageous.
  • a further object is to provide such a PAPR which is comfortable to wear and use.
  • Yet another object is to provide such a PAPR at which the gravitational load experienced by the user is comparatively low and which thereby may be used for comparatively long periods of time without causing fatigue or excessive strain, especially to the neck of the user.
  • Another object is to provide such a full-face mask which provides an unimpaired view through a visor of the mask.
  • a still further object is to provide such a full-face mask which may readily be disassembled for cleaning, maintenance and other purposes.
  • a further object is to provide such a full-face mask which allows for a modular construction wherein the different components may readily be exchanged for adapting the mask to different conditions of use.
  • Still another object is to provide such a full-face mask which may readily be manufactured and assembled at a comparatively low cost.
  • the PAPR comprises a full face mask which in use, together with the face of a user, defines an interior space.
  • the full face mask comprises a transparent visor, a peripheral face sealing rim arranged to bear against the face of a user, a mask inlet opening for supplying air from the surrounding atmosphere to the interior space and a mask outlet for exhausting air from the interior space.
  • the full face mask has a frontmost portion and a rearmost portion as defined when the full face mask is worn by a standing user facing horizontally forwards, which rearmost portion forms part of the face sealing rim.
  • the PAPR further comprises a supply air arrangement comprising an inlet tube extending through the mask inlet opening and an electric blower arranged to force air from the surrounding atmosphere through the mask inlet to the interior space, and a power source unit for supplying electric power to the blower, which power source unit comprises at least one electric storage device and exhibits a mounting opening which receives the air inlet tube.
  • the power source unit is arranged outside the interior space and the at least one electric storage device is arranged between respective vertical planes extending through the frontmost portion and the rearmost portion respectively of the full face mask.
  • the PAPR may be attached to and carried by the full face mask. Thereby, no electric wires or air conducting tubes for connecting the mask to components of the PAPR being separated from the mask are necessary.
  • the arrangement also allows for a compact and uncoplicated design of the PAPR.
  • the electric power storage device or devices may typically comprise an electric battery which may be rechargeable but other electric storage devices such as capacitors and superconductive magnets may also be used.
  • the PAPR may readily be adapted to different conditions of application by selecting and fixing a power source unit having the required energy capacity. Further the PAPR also allows for that the power source unit may readily be exchanged when reaching low power levels without the need to remove the mask form the head of the user.
  • the centre of gravity of the electric storage device is positioned at a comparatively short distance from the neck of the user.
  • the torque caused by the weight of the electric storage device and acting on the neck of the user is reduced.
  • the moment of inertia is reduced such that head movements of the user are facilitated.
  • the PAPR may be varied according to several embodiments. For example:
  • At least a portion of the power source unit may be positioned at a vertical level below the interior space. This allows e.g. for that also power source units comprising comparatively large electric storage devices may be positioned at a short distance from the neck of the user.
  • the electric blower may preferably be arranged in the interior space. By this means the power storage device is separated from the blower such that the power storage device may be exchanged separately, for example when the storage device has run out of electric power, without the need of removing the blower. Such an arrangement of the blower also provides a comparatively low overall pressure drop over the supply air arrangement resulting in high electric efficiency and long battery life.
  • the power source unit is preferably removably mounted to the full face mask. This also facilitates exchange of power source device.
  • the power source unit may comprise at least two electric storage devices which are arranged symmetrically with regard to a vertical centre line of the full face mask. By this means the gravitational load carried by the user is evenly distributed which enhances the ergonomics.
  • the energy capacity of the electric storage device or devices of the power source unit should preferably be sufficient for powering the blower and any further electric power consuming devices of the PAPR during normal use in at least 4 hours. Typically this means that the total energy capacity of the power source device or devices should be at least 10 Wh and preferably at least 20 Wh.
  • the inlet tube may exhibit an external thread and the power source unit may be removably mounted to the full face mask by a clamping nut which is threaded onto the external thread.
  • a clamping nut which is threaded onto the external thread.
  • the PAPR may further comprise an air filter unit which is removably fastened to the inlet tube, outside of the interior space. This allows for a simple an modular construction where the inlet tube is used for the fixation of both the power source unit and the filter unit to the full face mask.
  • the air inlet tube may exhibit and internal or external thread and the air filter unit may exhibit a corresponding external or internal thread for screw-fixation of the filter unit to the air inlet tube.
  • the electrical blower may be removably fastened to an interior end of the air inlet tube. This further enhances the modular design of the PAPR and allows for that the blower may readily be removed or exchanged if needed.
  • the electrical blower may be mounted in a housing which is in fluid communication with the air inlet tube and with the interior space.
  • the housing may be mounted to the interior end of the air inlet tube, preferably by cooperating snap-fitting means arranged on said interior end and on the housing.
  • the housing may exhibit an air passage arranged to direct supply air from the air inlet tube towards the interior surface of the visor.
  • the fresh air supplied from the surrounding atmosphere via the filter may be used for preventing the formation of mist on the inside of the visor.
  • the PAPR may comprise a flexible sheet formed deflector arranged to contact the nose of a user and to deflect exhaled air from the user towards the mask outlet. This also contributes to prevent the formation of mist on the inside of the visor.
  • the power source unit comprises two or more electric storage devices, these may be arranged in a downwardly narrowing V-formation. This allows for a compact design while maintaining the centre of gravity of the power source unit close to the neck of the user.
  • Fig. 1 is an exploded view in perspective of PAPR according to an exemplifying embodiment.
  • Figs. 2a-c are respective views from one side, from the front and obliquely from the front of the PAPR shown in fig. 1, when assembled.
  • Fig. 3 is a view from the back of the PAPR shown in fig 1, when assembled.
  • Fig. 4 is a side view, partly in section of the PAPR shown in fig. 1, when assembled.
  • Figs. 1-4 illustrate an PAPR comprising a full-face mask 10, a supply air arrangement 20, a power source unit 30 and a filter unit 40.
  • the full face mask 10 comprises a transparent visor 11, surrounded by a frame portion 12 and a peripheral face sealing rim 13 which is arranged to bear against the face and forehead of the user when the PAPR is worn.
  • the visor 11 is formed from a sheet of a transparent polymer material. Examples of materials for forming the visor are PETG (Polyethylene terephthalate glycol) and PC (Polycarbonate).
  • PETG Polyethylene terephthalate glycol
  • PC Polycarbonate
  • the visor 11 and the frame portion 12 are formed as an integral component from one and the same transparent polymer material.
  • the visor may be formed of a first transparent material and the frame portion from another material which may be transparent or not.
  • the visor 11 exhibits a single or double curved surface for providing a wide and undistorted field of view to the user.
  • the face sealing rim 13 is formed of a flexible material which is able to closely adapt its shape to the contour of the user’s face.
  • the face sealing rim 13 is formed of an injection mouldable flexible polymer material. Examples of such materials suitable for the face sealing rim are TPE, silicone and rubber.
  • the face sealing rim 13 has a three-dimensional shape with an outer peripheral edge 13a arranged to sealingly contact the face of the wearer and a central through opening surrounded by an edge.
  • the frame 12 is received in the central opening and the perimeter of the frame 12 is sealingly fixed along the inner edge of the face sealing rim 13.
  • the face sealing rim 13 comprises a number of protruding fixation tabs 14 arranged to be connected to a harness (not shown) for the fixation of the mask 10 the head of the user.
  • the fixation tabs 14 protrude from the sealing rim 13 at a distance from the peripheral edge 13a of the sealing rim 13.
  • the frame portion 12 exhibits a central lower through opening which forms a mask inlet 15.
  • the mask inlet is positioned centrally below the visor 11.
  • the frame portion 12 further exhibits two mask outlets 16 which are arranged symmetrically at ether side of the mask inlet 15, below the visor 11.
  • Both mask outlets 16 comprise a through opening in the frame portion 12 and a one-way exhaust valve 16a.
  • each exhaust valve 16a comprises circular disk made of a flexible sheet material.
  • the full face mask 10 exhibits a frontmost portion 17 and a rearmost portion 18 as defined when the mask is worn by a standing user facing horizontally forward, which position of the full face mask is illustrated in figures.
  • the frontmost portion 17 is arranged at the lateral centre of the mask 10 just below the visor 11, at the junction between the visor n and the frame portion 12.
  • the rearmost portion 18 is formed by respective laterally distanced portions of the peripheral edge 13a of the face sealing rim 13.
  • the supply air arrangement 20 comprises an inlet tube 21 which, when mounted, extends through the mask inlet 15.
  • the inlet tube 21 has a first end with a radially protruding flange 21a which is arranged in the interior space and which, via an intermediate gasket 22, supportingly abuts the inside of the frame portion 12 around the mask inlet 15.
  • the second end of the inlet tube 21 is arranged outside the mask and exhibits an external thread 21b and an internal thread 21c.
  • the supply air arrangement 20 further comprises a clamping nut 23 with an internal thread such that the clamping nut 23 may be threaded onto the external thread 21b of the inlet tube 21, from the outside of the full face mask 10.
  • the supply air arrangement 20 may thereby be removably fixed to the full face mask 10 by clamping the frame portion’s 12 edge around the mask inlet 15 between the flange 21a and the clamping nut 23.
  • the supply air arrangement 20 further comprises a housing 24 which is snap-fitted onto the flange 21a of the inlet tube 21.
  • the housing 24 and the flange 21a define a cylindrical cavity in which a blower (not shown) in the form of a radial or centrifugal fan is arranged.
  • the blower draws air from an air channel defined by a longitudinal bore through the inlet tube 21 and expels the air into the interior space through an air passage 24a which in the shown example is formed by a plurality of radial openings in the housing 24.
  • the air passage 24 is arranged in proximity to a lower portion of the visor 11, such that the inlet air expelled from the housing 24 is directed towards and along the interior surface of the visor 11.
  • the filtered inlet air supplied to the interior space contributes to prevent the formation of mist on the inside of the visor 11.
  • the arrangement of the housing 24 and the air passage 24a also prevents the inlet airflow to be directed directly towards the face and especially the eyes of the user, which otherwise may be uncomfortable and irritating for the user.
  • the filter unit 10 comprises a cylindrical container 41, a filter inlet 42 and an externally threaded protruding portion 43 with a central filter outlet.
  • a non-shown filter is arranged inside the container 41 for filtering air passing inside the container 41 from the filter inlet 42 to the filter outlet.
  • the filter unit is removably mounted to the full face mask 10 by threading the protruding portion 43 into the outer, internally threaded portion 21c of the inlet tube 21.
  • the exemplifying power source unit 30 shown in the figures is formed of an injection moulded polymer material. It comprises two electric storage device (not shown).
  • the electric storage devices maybe electric batteries, preferably rechargeable but they could also comprise capacitors, superconductive magnets, or other devices for storing electric energy.
  • the overall shape of the power source unit 30 results from the arrangement of the batteries such that the outer shape of the power source unit 30 tappers downwardly in the lateral direction.
  • the power source unit 30 comprises a mid- portion 31 which connects two lateral side portions forming chambers 32 for holding a respective electric storage device.
  • the mid portion 31 exhibits a through opening 33 having a shape which corresponds to and is somewhat larger than the cross-section of the outer end of the inlet tube 21.
  • the outer cross-section shape of the inlet tube’s outer end and of the power source unit’s through opening 33 are generally circular with radially opposing flat portions.
  • the power source unit 30 is removably fixed to the full face mask 10 by the through opening 33 being slipped onto the outer end of the inlet tube 21 and the mid portion 31 being clamped against the outside of the frame portion 12 by means of the clamping nut 23.
  • the two chambers 32 holding a respective electric storage device are arranged between a vertical plane VPf extending through the frontmost portion 17 of the full face mask 10 and a vertical plane VP r extending through the rearmost portion 18 of the full face mask 10.
  • the centre of gravity of the comparatively heavy electric storage devices (having a comparatively high density) is arranged at a comparatively short horizontal distance from the neck of the user.
  • the gravitational torque applied to the user’s neck is kept low and the moment of inertia of the PAPR is reduced such that head movements of the user are facilitated.
  • the arrangement of the power source unit thus provides for a PAPR which is ergonomically advantageous.
  • the exemplifying PAPR further comprises a deflector 50 for directing exhaled air from the user’s mouth and nose towards the mask outlets 16.
  • the deflector 50 comprises a flexible sheet-formed element made of a comparatively soft polymer material.
  • the deflector 50 is fixed to and extends into the interior space from an upper portion of the housing 24 and is arranged to contact the nose of the user and possibly portions of the user’s cheeks.
  • the deflector 50 may extend laterally such that it is wider than the normal width of an adult human’s mouth.
  • the deflector 50 however does not form a traditional inner mask which defines an a exhalation air space being sealed of from the rest of the mask’s interior space. Utilizing a flexible deflector 50 instead of a sealing inner mask reduces the risk of giving the user a sensation of claustrophobia which frequently occurs at traditional full face masks provided with an inner mask sealingly covering the user’s nose and mouth.
  • the PAPR disclosed herein is advantageous in that it allows for a modular construction wherein each of the different components, especially the power source unit 30, the filter unit 40, the fan and the deflector 50 may readily be removed and exchanged separately, without the need to exchange any of the other components.
  • the PAPR may thus efficiently be adapted to different users and conditions of application. This is achieved by the supply air arrangement 20 comprising the inlet tube 21 which forms an interface for the removable attachment of several different exchangeable components.

Landscapes

  • 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)

Abstract

La présente invention concerne un appareil de protection respiratoire à épuration d'air motorisé (PAPR) comprenant : un masque facial intégral (10) qui, lors de l'utilisation, conjointement avec le visage d'un utilisateur, définit un espace intérieur. Le masque facial intégral comprend une visière transparente (11), un rebord d'étanchéité de face périphérique (13) agencé pour prendre appui contre le visage d'un utilisateur, une ouverture d'entrée de masque (15) pour fournir de l'air de l'atmosphère environnante à l'espace intérieur et une sortie de masque (16) pour évacuer l'air de l'espace intérieur. Le masque facial intégral (10) a une partie la plus en avant (17) et une partie la plus en arrière (18) telles que définies lorsque le masque facial intégral (10) est porté par un utilisateur debout faisant face horizontalement vers l'avant, laquelle partie la plus en arrière (18) fait partie du rebord d'étanchéité de face (13). Le PAPR comprend en outre un agencement d'air d'alimentation (20) comprenant un tube d'entrée (21) s'étendant à travers l'ouverture d'entrée de masque (15) et une soufflante électrique agencée pour forcer l'air de l'atmosphère environnante à passer à travers l'entrée de masque (15) à l'espace intérieur, et une unité de source d'alimentation (30) pour fournir de l'énergie électrique à la soufflante. L'unité de source d'alimentation (30) comprend au moins un dispositif de stockage électrique et présente une ouverture de montage (33) qui reçoit le tube d'entrée d'air (21). L'unité de source d'alimentation (30) est fixée au masque facial intégral (10) et disposée à l'extérieur de l'espace intérieur et l'au moins un dispositif de stockage électrique est disposé entre des plans verticaux respectifs (VRf, VRr) s'étendant à travers la partie la plus en avant (17) et la partie la plus en arrière (18) respectivement du masque facial intégral (10).
PCT/EP2024/057625 2023-03-22 2024-03-21 Appareil de protection respiratoire à épuration d'air motorisé Pending WO2024194417A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2350321A SE547034C2 (en) 2023-03-22 2023-03-22 A powered air purifying respirator comprising a full face mask and a power source unit fixed thereto
SE2350321-2 2023-03-22

Publications (1)

Publication Number Publication Date
WO2024194417A1 true WO2024194417A1 (fr) 2024-09-26

Family

ID=90544962

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/057625 Pending WO2024194417A1 (fr) 2023-03-22 2024-03-21 Appareil de protection respiratoire à épuration d'air motorisé

Country Status (2)

Country Link
SE (1) SE547034C2 (fr)
WO (1) WO2024194417A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138666A (en) * 1987-12-18 1992-08-11 Actron Manufacturing Company Voice transmission system
US5224473A (en) * 1991-03-04 1993-07-06 Bloomfield John W Retrofitting gas mask voice amplifier unit with easily actuated switch means
US20100224190A1 (en) 2007-11-20 2010-09-09 Avon Protection Systems, Inc. Modular powered air purifying respirator
CN205698963U (zh) * 2016-06-12 2016-11-23 浙江恒泰安全设备有限公司 一种压力平视显示装置
US20170003611A1 (en) 2015-07-02 2017-01-05 Samsung Electronics Co., Ltd. Toner for developing electrostatic charge image and method for preparing the same
CN106422104A (zh) * 2016-10-17 2017-02-22 麦萌创意科技（深圳）有限公司 可穿戴呼吸装置
US20210330853A1 (en) * 2020-04-24 2021-10-28 David Mizandari Air purification apparatus
US20210401086A1 (en) * 2020-06-29 2021-12-30 Intellisafe Llc Protective mask
WO2022079551A1 (fr) 2020-10-15 2022-04-21 3M Innovative Properties Company Dispositif de protection respiratoire à détection haptique
EP2818205B1 (fr) * 2012-02-23 2022-12-28 Koken Ltd. Équipement de protection respiratoire

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013537812A (ja) * 2010-09-07 2013-10-07 ネクストテック エルエルシー ガスマスクのカートリッジおよびキャニスタに対する残存有効寿命指示
WO2015056464A1 (fr) * 2013-10-17 2015-04-23 株式会社重松製作所 Appareil respiratoire
AU2017248735B2 (en) * 2016-04-15 2019-08-15 Scott Technologies, Inc. Headgear for first responders

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138666A (en) * 1987-12-18 1992-08-11 Actron Manufacturing Company Voice transmission system
US5224473A (en) * 1991-03-04 1993-07-06 Bloomfield John W Retrofitting gas mask voice amplifier unit with easily actuated switch means
US20100224190A1 (en) 2007-11-20 2010-09-09 Avon Protection Systems, Inc. Modular powered air purifying respirator
EP2818205B1 (fr) * 2012-02-23 2022-12-28 Koken Ltd. Équipement de protection respiratoire
US20170003611A1 (en) 2015-07-02 2017-01-05 Samsung Electronics Co., Ltd. Toner for developing electrostatic charge image and method for preparing the same
CN205698963U (zh) * 2016-06-12 2016-11-23 浙江恒泰安全设备有限公司 一种压力平视显示装置
CN106422104A (zh) * 2016-10-17 2017-02-22 麦萌创意科技（深圳）有限公司 可穿戴呼吸装置
US20210330853A1 (en) * 2020-04-24 2021-10-28 David Mizandari Air purification apparatus
US20210401086A1 (en) * 2020-06-29 2021-12-30 Intellisafe Llc Protective mask
WO2022079551A1 (fr) 2020-10-15 2022-04-21 3M Innovative Properties Company Dispositif de protection respiratoire à détection haptique

Also Published As

Publication number Publication date
SE2350321A1 (en) 2024-09-23
SE547034C2 (en) 2025-04-08

Similar Documents

Publication Publication Date Title
EP1003590B1 (fr) Systeme de protection du visage et des voies respiratoires
US20210330853A1 (en) Air purification apparatus
CA2230616C (fr) Casque chirurgical
US11771928B2 (en) Filter mask
US10342999B2 (en) Particulate filter face mask having fan breathing assist
AU2011238597B2 (en) Helmet-mounted respirator apparatus with a dual plenum system
US20210308499A1 (en) Powered air-purifying respirator
US20210308496A1 (en) Respiratory mask
US11992710B2 (en) Filter mask
JP2007524436A (ja) 呼吸具フードおよびヘルメット用の硬質空気ダクト
US20210274861A1 (en) Filter mask
CN110772724A (zh) 一种过滤口罩装置
US20220118290A1 (en) Powered air filtration face covering
WO2024194417A1 (fr) Appareil de protection respiratoire à épuration d'air motorisé
EP0108560A1 (fr) Unité d'alimentation d'air à moteur pour respirateurs
US20210275840A1 (en) Filter mask
CN2443741Y (zh) 改进的防毒面具
CN214550708U (zh) 一种轻便型电动空气净化呼吸器及其空气净化机
CN216409224U (zh) 行动空气净化器
CN214596865U (zh) 低成本面罩及包含其的电动空气净化呼吸器
WO2025133182A2 (fr) Lunettes de protection et respirateur
WO2022174271A1 (fr) Masque protecteur

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24714884

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE