WO2021089626A1 - Respirateur à air pouvant être installé sur la tête - Google Patents

Respirateur à air pouvant être installé sur la tête Download PDF

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Publication number
WO2021089626A1
WO2021089626A1 PCT/EP2020/080969 EP2020080969W WO2021089626A1 WO 2021089626 A1 WO2021089626 A1 WO 2021089626A1 EP 2020080969 W EP2020080969 W EP 2020080969W WO 2021089626 A1 WO2021089626 A1 WO 2021089626A1
Authority
WO
WIPO (PCT)
Prior art keywords
face
air purifying
purifying respirator
visor
powered air
Prior art date
Application number
PCT/EP2020/080969
Other languages
English (en)
Inventor
Thomas BLAKEMAN
Nils Aksnes
Joshua Ward
Andrew Simpson
Peter UPCOTT
Krzystof SZELAZEK
Morven SHEARLAW
Original Assignee
Centurion Safety Products Ltd
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 Centurion Safety Products Ltd filed Critical Centurion Safety Products Ltd
Priority to GB2207973.5A priority Critical patent/GB2604826A/en
Publication of WO2021089626A1 publication Critical patent/WO2021089626A1/fr

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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
    • A62B18/006—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
    • A62B18/04—Gas helmets
    • A62B18/045—Gas helmets with fans for delivering air for breathing mounted in or on the helmet
    • 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
    • A62B18/084—Means for fastening gas-masks to heads or helmets

Definitions

  • the present invention relates to a powered air respirator, in particular the invention relates to a single unit head-mountable powered air respirator facilitating, at least respiratory, eye and face protection.
  • a powered air-purifying respirator intakes contaminated air, through one or more filtration units, which remove contaminants and hazardous materials from the air and deliver cleaner, non-hazardous breathable air to the user.
  • a PAPR is an example of personal protective equipment, which is used to minimise personnel’s exposure to atmospheric hazards.
  • the PAPR protects the wearer by preventing him or her from inhaling contaminants.
  • a respirator does not perform any breathing function for the user. Instead, its purpose is to clean/purify contaminated air before it is inhaled, thereby preventing contaminated air entering the user’s bodily organs, lungs and/or airways.
  • a suitable filter unit traps harmful particles and fumes from the air which is being drawn through the system, typically, by a powered fan or the like.
  • PAPR systems fall into two categories i.e. head mounted systems and waist mounted systems.
  • a head mounted system typically provides protection of the user’s head, eyes and face.
  • a first aspect of the present invention provides a head mountable powered air purifying respirator configured to connect, as a single unit, to a user’s head or to headwear to be or being worn by a user
  • the head mountable powered air purifying respirator comprises: an annular casing, which is attachable to and detachable from a user’s head or to headwear to be or being worn by a user
  • the annular casing includes: a power source, which is operable to power/control one or more filtration units, which is/are attachable to the casing; and a detachable visor, including a face-shield, wherein, the visor is attachable to and detachable from a front edge of the annular casing such that in use the visor extends down from the annular casing and defines an enclosed volume between the face-shield and a user’s face; wherein the power source is operable to power the one or more filtration units to filter contaminated air from an environment in which the air purifying respir
  • the air purifying respirator system is configured to be attached to a user’s head or headwear as a single unit, which provides, at least respiratory protection, eye protection and face protection.
  • headwear when used with a standard unmodified safety helmet, hard hat or suitable headwear it will be appreciated the combination of headwear and the single unit powered air purifying respirator system provides head protection, respiratory protection, eye protection and face protection.
  • the visor may comprise a pivotal rod attachment, which facilitates single point attachment and detachment of the visor to/from the annular casing, wherein the annular casing includes a complementary latching mechanism configured to receive and retain the rod attachment.
  • the latching mechanism may include a latch member and one or more spring biased connectors, which are configured to apply a spring force to the latch member and/or the rod attachment such that, in use the latch mechanism is operable to retain the rod attachment and therefore the visor in a predetermined position.
  • the latch member may include a jaw into which the rod attachment is received to retain the visor as part of the air purifying respirator.
  • the latch member may be pivotal such that the jaw pivots relative to the rod attachment member to retain and to release the rod attachment. Interaction of the rod attachment and the latching mechanism facilitates easy attachment and detachment of the visor to and from the annular casing such that the visor can be removed for maintenance or changed for hygiene reasons, for example, when different users wish to use the air purifying respirator.
  • Easy attachment and detachment may be by one hand releasing, for example pivoting the latch member, thereby facilitating release of the rod attachment and the same hand or another hand removing the visor.
  • attaching, detaching and changing the visor can be done easily and swiftly without removing the annular casing from the user’s head, headwear or helmet, as such the user’s safety in certain environments (e.g. designated head protection areas) is not compromised.
  • the one or more spring biased connectors and the rod attachment may each comprise complementary end profiles, which are engageable with each other to control extent of rotation of the visor to one or more predetermined positions.
  • the complementary end profiles act as guides and stops to control movement of the visor and to lock the visor between at least two predetermined positions, namely a deployed position, where the visor extends downwards from the annular casing and an undeployed position, where the visor no longer shields the user’s face.
  • the undeployed position may be where the visor extends outwards and/or at least partially upwards relative to the annular casing.
  • the face-shield of the visor may further comprise a flange, which projects inwards and facilitates connection of the visor to a forward edge of the annular casing.
  • the rod attachment may extend from the flange.
  • the flange may further comprise a bracket connecting the rod attachment to the flange and offsetting the rod attachment from the flange to ensure alignment of the rod attachment and the latch member.
  • the flange may include one or more holes, which correspond in number and location with the one or more filtration units such that, in use there is fluid communication between each of the one or more holes and their corresponding filtration unit.
  • the one or more holes may each be shaped to correspond with the shape of an outlet from the corresponding filtration unit, such that in use each outlet aligns with and engages with a corresponding hole.
  • the one or more holes may include a seal configured to provide an airtight seal between each hole and its corresponding filtration unit.
  • the flange may further comprise one or more locating elements, which are arranged to engage with an underside of the annular casing, such that, in use the visor is retained in a deployed position to ensure respiratory protection, eye protection and face protection.
  • the one or more locating elements may include magnets.
  • the visor may further comprise a face-seal, wherein the face-seal connects to the face-shield and the face to form the enclosed volume between the face-shield and the user’s face.
  • a perimeter of the face-seal may be attached to a perimeter of the face-shield.
  • the face-seal may be permanently attached to the face-shield.
  • the face-seal may be removably attached to the face-shield.
  • the face-seal may be adhered/bonded to the face-shield or may include edging clamp members, which facilitate attachment and detachment of the face-seal and the face-shield.
  • the face-seal may comprise a flexible body made of flexible, pliable fabric such that movement of the user’s face and neck is unrestricted and user and to ensure the enclosed volume is maintained.
  • An inner perimeter of the face-seal comprises a flexible and compliant edge/rim which resiliently conforms to the contour of the user’s face, jaw and/or neck to ensure an enclosed volume between the face-shield and the user’s face is maintained whilst the air purifying respirator is in use.
  • the face-seal may include an upper outward projecting flange, wherein the flange engages with the visor flange to create the enclosed volume between the face-shield and the user’s face.
  • the face-seal’s flange may be flexible and compliant such that it compresses to conform with the shape of the face-shield’s flange to create a substantially air-tight enclosed volume between the face-shield and the user’s face.
  • the one or more filtration units may include a fan element and a filter element, wherein the fan facilitates air flow through the filtration unit, thereby cleaning air to be breathed in by the user.
  • the fan element may include a body retained in the annular casing, an inlet and an outlet, wherein the filter element is received adjacent the inlet and the outlet is arranged to be in fluid communication with a corresponding hole through the flange.
  • the filter element may comprise a removable cartridge, which includes filter medium and a housing, wherein the filter medium is housed in the housing, which include at least a partially open inlet face.
  • the removable cartridge is attachable to and detachable from the inlet of the fan element. Attachment and detachment of the removable cartridge from the fan element may be via a bayonet fitting for ease of attachment and detachment.
  • the filtration unit may further comprise a perishable pre-filter element, wherein the pre-filter element is insertable into and removable from the housing and wherein, in use, the pre-filter element is located outwardly of filter medium.
  • the housing may include an edge slot, which facilitates insertion and removal of the pre-filter element.
  • the power source being operable to power the one or more filtration units, such that the fan element draws contaminated air through filter element and draws clean/filtered air through the body of the fan element to the outlet into the enclosed volume between the face-shield and the user’s face.
  • the annular casing may include at least one of a forward mounting or rearward mounting element operable to facilitate attachment and detachment of the air purifying respirator to headwear.
  • the annular casing may include a forward mounting element and a rearward mounting element. At least one of the forward mounting element and the rearward mounting element may include a retractable fastener, which is configured to engage with a corresponding edge of the headwear to which the air purification respirator is being attached.
  • the retractable fastener may be biased to a retracted position, such that retraction is automatic when engaging the air purifying respirator to headwear.
  • a front and/or rear mounting element means the powered air purifying respirator is easily detached from headwear, whilst the headwear is worn such that fitting and removal is done easily without compromising the safety of the user.
  • a further aspect of the invention provides a retrofittable headwear mountable powered air purifying respirator comprising the powered air purifying respirator according to the first aspect.
  • a further aspect of the invention provides a safety helmet comprising a powered air purifying respirator according to the first aspect.
  • Figure 1 illustrates an exploded view of the component parts used to form a powered air-purifying respirator as an example of the present invention
  • Figure 2a illustrates a perspective view of a powered air-purifying respirator configured by assembly of the components illustrated in Figure 1
  • Figure 2b illustrates a front/elevation view of a powered air-purifying respirator configured by assembly of the components illustrated in Figure 1 ;
  • Figure 2c illustrates a rear view of a powered air-purifying respirator configured by assembly of the components illustrated in Figure 1 ;
  • Figure 2d illustrates a side view of a powered air-purifying respirator configured by assembly of the components illustrated in Figure 1 ;
  • Figure 3 illustrates a visor used with the powered air-purifying respirator illustrated in figures 1 and 2a to 2d;
  • Figure 4a illustrates a perspective view of an assembly of the powered air-purifying respirator of figures 2a to 2d and a safety helmet/hard hat
  • Figure 4b illustrates a front/elevation view of an assembly of the powered air- purifying respirator of figures 2a to 2d and a safety helmet/hard hat
  • Figure 4c illustrates a rear view of an assembly of the powered air-purifying respirator of figures 2a to 2d and a safety helmet/hard hat;
  • Figure 4d illustrates a side view of an assembly of the powered air-purifying respirator of figures 2a to 2d and a safety helmet/hard hat
  • Figure 5a illustrates a cowl, which is attached to the visor of figure 3;
  • Figure 5b illustrates a perspective view (viewed from inside) of an assembly of the visor and the cowl.
  • FIG 1 illustrates an exploded view of a head mountable powered air- purifying respirator (PAPR) 10, which is an example of the present invention.
  • PAPR head mountable powered air- purifying respirator
  • FIGS. 2a, 2b, 2c and 2d illustrate an assembled PAPR 10; each figure presents a different view of an assembly of the components illustrated in Figure 1.
  • a PAPR 10 which comprises a casing 12 that defines an annular headpiece, which can be worn on a user’s head, but more specifically is configured to be attached to headwear, for example a safety helmet/hard hat (see figures 4a, 4b, 4c and 4d) to provide respiratory protection, head protection, eye protection and face protection.
  • the casing 12 includes two hollow shell sections 12A, 12B (an upper shell section 12A and a lower shell section 12B).
  • the shell sections 12A and 12B join via bosses 13 and fasteners (not shown).
  • the shell sections 12A and 12B could be joined in other ways, for example snap-fit about edges, or spring clawed bosses etc.
  • the casing 12 is made of plastic, for example thermoplastic material such as Acrylonitrile Butadiene Styrene (ABS), polycarbonate, nylon etc.
  • ABS Acrylonitrile Butadiene Styrene
  • nylon nylon
  • the casing 12 defines a foundation to which two filtration units 14, a power source 16 and a visor 18 are attachable such that the PAPR 10 is configured as a single unit that can be worn on a user’s head or attached to and/or detached from headwear whilst it is worn or is to be worn.
  • Each filtration unit 14 includes a blower/fan 20 and a removable filter cartridge
  • each blower/fan 20 is contained within the casing 12 and an outer face 21 of the blower/fan is exposed at the face of the casing 12 to facilitate attachment of the filter cartridge 22 to the blower/fan 20.
  • the body 19 of each blower/fan 20 includes a duct section 23, which is mainly contained within the casing 12 with the exception of the outlet 24, which extends through an opening (not illustrated) through the floor of the lower shell section 12B of the casing 12.
  • the outlets 24 extend downwards and in use, each outlet 24 extends through a corresponding hole through the flange proximate the top of the visor 18 (as described further below).
  • the outlets 24 are arranged, such that, in use, they deliver clean air to the volume defined between the inside of the face-shield 30 of the visor 18 and the user’s face.
  • each filter cartridge 22 is attached to the face 21 of its respective blower/fan 20 by a bayonet fitting 25.
  • a bayonet fitting 25 is provided by locating a protrusion/lug of one member (blower/fan 20 or filter 22) within a groove on another member (filter cartridge 22 or blower/fan 20) and rotating one member (e.g. the filter cartridge 22) relative to the other (e.g. the blower/fan 20) to lock the members together.
  • the filter cartridge 22 is consumable, therefore it is desirable, as it becomes dirty and inefficient, that it is easily removed from the face 21 of the blower/fan 20.
  • a bayonet fitting 25 facilitates quick and easy removal and replacement of the filter cartridge 22.
  • the filter cartridge 22 includes a housing 31 and filter medium 33.
  • the housing 31 (as described above) facilitates connection of the filter medium 33 to the blower/fan 20 and removal of the filter medium 33 from the blower/fan 20. Removal of the filter cartridge 22 allows replacement of the filter medium 33 when it is contaminated
  • the housing 31 includes a slot
  • the pre-filter element 37 and the filter cartridge 22 provide a two-stage filtration process, which exhausts cleaned air into the enclosed volume between the face-shield 30 and the user’s face. It will be appreciated, this two-stage filter process extends/prolongs the life of the second stage filter medium 33 and therefore prolongs the life of the removable filter cartridge 22. Typically, the cost to replace the pre-filter element 37 will be much less than the cost to replace the filter cartridge 22.
  • a power source 16 is mounted to the rear of the casing 12.
  • the power source 16 may be a battery 27 (rechargeable) and switch 29 arrangement, where the battery 27 is wired to the switch 29 and to each blower/fan 20. By actuating the switch 29 each blower/fan 20 begins drawing contaminated air through each filter 22.
  • the hollow casing 12 facilitates internal routing of wires between the components, for example the battery 27, the switch 29 and the blower/fans 20.
  • the switch 29 is provided by a push button, which is located towards the rear of the casing 12 and is exposed through the ceiling of the upper shell section 12A.
  • the blower/fan 20 is started and stopped by depressing the push button (switch 29).
  • the PAPR 10 may include visual or audible indicators etc.
  • visual and/or audible indicators may alert the user about environmental conditions and/or the condition of the filter medium 33 i.e. when the filter 33 is contaminated and filter cartridge 22 should be replaced.
  • the PAPR 10 may also include an alarm (not illustrated) which will activate if the PAPR 10 is used and there is no filter cartridge 22 in place.
  • the alarm (audible or visual) may also indicate if the battery i.e. power source 16 is low power and should be replaced or recharged.
  • the visor 18 is configured to attach to a front edge of the casing 12. In the illustrated example, when attached to the casing 12, the visor 18 is biased to a deployed position where the visor 18 extends down from the casing 12 such that in use, the visor 18 covers the user’s face.
  • the visor 18 includes a curved face-shield 30, an upper flange 32 and a rod attachment 38.
  • the visor 18, is see-through such that the user’s view is not obscured.
  • the face-shield 30 is made of clear polycarbonate or clear plastic. Depending on the environment in which the PAPR 10 is to be used, it will be appreciated, that the face-shield 30 may include tinted see-through material.
  • the upper flange 32 extends inwards to facilitate connection of the visor 18 to the casing 12.
  • the upper flange 32 includes two elongated holes 34, locating elements 36 and a centrally located attachment rod 38.
  • the elongated holes 34 are each shaped to correspond with the shape of the outlets 24 from each blower/fan 20 such that in use each outlet 24 aligns with and extends through a corresponding one of the elongated holes 34.
  • a sealing gasket 40 is provided about the perimeter of each elongated hole 34 such that an airtight seal is created between the gasket 40 and the outlet 24 to maximise air flow into the volume between the face-shield 30 and the user’s face.
  • the locating elements 36 are arranged as two pairs, where each pair is arranged towards an outer edge of the flange 32 and the visor 18.
  • the locating elements 36 are arranged to engage with corresponding elements (not visible) located on the base of the lower shell section 12B of the casing 12.
  • the locating elements 36 may comprise magnets, where magnetic attraction between the locating elements 36 and corresponding magnetic elements (not visible) on the casing 12 assist in holding the visor 18 in position.
  • An alternative arrangement may be provided by a protruding locating element extending into a hole to assist in restraining the visor 18 in the deployed position.
  • the centrally located attachment rod 38 facilitates a single-point connection of the visor 18 to a latch 42 (see figures 1 , 2a and 2b), which is located on the front face of the upper shell section 12A of the casing 12.
  • the attachment rod 38 is attached to the flange 32 by a bracket 44 which connects the rod 38 to the flange 32, offsets the rod 38 from the flange 32 and aligns the rod 38 with the latch 42.
  • the latch 42 is spring biased (discussed further below). This means that when the rod 38 is engaged with the latch 42, the latch 42 automatically assumes the position where the visor 18 (i.e. the face-shield 30) extends down from the front edge of the casing 12.
  • the latch 42 facilitates easy attachment and detachment of the visor 18 such that the visor 18 can be changed for maintenance or changed for hygiene reasons, for example, when different users wish to use the PAPR 10.
  • the latch 42 includes a jaw 43 into which the rod 38 is received to retain the visor 18 as part of the PAPR 10.
  • the spring connectors 46 each include a spring applying a spring force to a short shaft, which terminates with an inward facing face 48.
  • the inward facing face in use, engages with a corresponding end face 47 of the attachment rod 38.
  • the faces 48 of the spring connectors 46 and the end faces of the attachment rod 46 each include complementary profiled surfaces such that the profiled surfaces act as guides and stops (ratchet affect) to control movement of the visor 18 and to lock the visor 18 in predetermined positions, for example the deployed position (extending downwards from the casing 12) and the undeployed position (extending upwards or outwards from the casing 12) i.e. where the user’s face is no longer shielded.
  • the visor 18 By overriding the spring force, the visor 18 can be pivoted relative to the latch 42.
  • the pivotal rotation of the visor 18 is guided by the interaction of the end faces
  • an example application of the PAPR 10 is as an attachment to headwear, for example a safety helmet/hard hat 50 (see figures 4a, 4b, 4c and 4d) such that the entire assembly provides respiratory protection, head protection, face protection and eye protection using a single device.
  • ear defenders (not illustrated) may be incorporated as part of the PAPR 10. Therefore, hearing protection respiratory protection, head protection, face protection and eye protection can be provided by the PAPR 10 as described.
  • the illustrated PAPR 10 includes a hook latch 52 at the rear and a spring latch 54 at the front. This arrangement means that the PAPR 10 can be attached to/detached from the safety helmet/hard hat 50 whilst the safety helmet/hard hat 50 is being worn.
  • the PAPR 10 can be attached and detached in a similar manner to placing for example a safety helmet or baseball cap on one’s head i.e. locating the rear of the PAPR 10 adjacent the occipital bone and pivoting the front of the PAPR 10 forward (relative to the user’s head or headwear).
  • the rear of the PAPR 10 is engaged with the rear of a safety helmet/hard hat 50 via the hooked latch 52.
  • the hooked latch 52 is fixed and extends downwards from the rear, bottom edge of the casing 12.
  • the hook latch 52 includes a forward-facing lip 53, which engages with the rear of the safety helmet/hard hat 50.
  • the hook latch 52 and lip 53 facilitate correct orientation of the PAPR 10 and one-handed attachment and detachment of the PAPR 10 to/from the safety helmet 50.
  • the one-handed operation of attaching and detaching the PAPR 10 is facilitated by the front spring latch 54, which is located to the front edge of the
  • PAPR 10 and is configured to engage with and lock against a front edge of the safety helmet/hard hat 50.
  • the spring latch 54 incorporates a hook 55 (see figure 1 ), which engages with a front edge of the safety helmet/hard hat 50
  • the spring latch 54 is biased to a locked/engaged position such that the latch 54 moves to accommodate engagement/hooking to the front edge of the safety helmet/hard hat 50 with an automatic spring effect to lock the spring latch 54 in place once the edge of the safety helmet/hard hat 50 and the hook 55 of the spring latch 54 are engaged.
  • the user releases the spring latch 54 by overriding the spring force (e.g. pulling the hook 55 forward) and unhooks the hook 55 of the spring latch 54 from the safety helmet/hard hat 50, thereby releasing the front of the PAPR 10.
  • the front of the PAPR 10 can then be lifted and tilted relative to the safety helmet/hard hat 50 to release/detach the rear hook latch 52 and remove the PAPR 10 from the safety helmet/hard hat 50.
  • the one-handed action of attaching and detaching the PAPR 10 can be performed whilst the safety helmet/hard hat is being worn. This means that in certain environments head protection is never compromised.
  • Figure 1 and figure 5a illustrates a face-seal 60, which is attached to the visor 18 to complete the respiratory protection aspect of the PAPR 10.
  • Figure 5b illustrates an assembly of the face-seal 60 and the visor 18.
  • the front of the face-seal 60 is configured to attach to the perimeter of the face-shield 30 and the rear of the face-seal 60 is configured, such that in use it contacts with the face and neck to create an enclosed volume between the face- shield 30, the user’s face and the face-seal 60 for breathing cleaned/filtered air.
  • the face-seal 60 is made of flexible, compliant material, e.g. neoprene or other flexible/elasticated material which is configured, in use, to deform and allow to the shape of the user’s face, fore-head, jaw and neck area i.e. contact areas to define the desired enclosed volume for breathing uncontaminated air.
  • the face-seal 60 is made from a composition of flexible fabric, foam and adhesive 63. In the illustrated example, the adhesive bonds the front perimeter edge/rim of the face-seal 60 to the face-shield 30.
  • the face-seal 60 connects to the face-shield and the user’s face to form the enclosed volume between the face-shield and the user’s face.
  • the face-seal 60 is made of flexible, pliable fabric, for example neoprene or similar flexible/elasticated material such that movement of the user’s face and neck is unrestricted and to ensure the enclosed volume between the face-shield and the user’s face is maintained, in use.
  • An inner perimeter of the face-seal 60 includes a flexible and compliant edge/rim which resiliently conforms to the contour of the user’s face, jaw and/or neck to ensure the enclosed volume between the face-shield and the user’s face is maintained whilst the air purifying respirator is in use.
  • the face-seal 60 includes a one-way valve 64, which permits the user to breathe normally whilst wearing the PAPR 10 because the one-way valve 64 is configured to expel exhaled carbon dioxide (CO2) from the volume defined by the face-shield 30, the user’s face and the cowl 60.
  • CO2 exhaled carbon dioxide
  • the face-seal 60 also includes a forehead portion 66 (i.e. an outward projecting flange), which is made of compliant material, for example closed cell foam.
  • the forehead portion 66 is connected, e.g. bonded/adhered to the flange 32 on the visor 18 (see figure 5b) and extends inwards from the visor flange 32, such that, in use, the forehead portion 66 rests against, and due to the compliant material used, compresses/deforms to conform with the contour of the user’s forehead to ensure that an airtight volume is created between the PAPR 10 and the user’s face.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

La présente invention concerne un respirateur à purification d'air motorisé (10) pouvant être installé sur la tête et configuré pour être relié, en tant qu'unité unique, à la tête d'un utilisateur ou à un couvre-chef porté ou devant être porté par un utilisateur. Le respirateur à purification d'air motorisé (10) pouvant être installé sur la tête comprend une structure annulaire (12), qui peut être fixée à la tête de l'utilisateur ou à un couvre-chef, par exemple un casque de sécurité/de protection standard non modifié, et en être détachée. La structure annulaire (12) fournit une base pour une source d'alimentation (16), qui est conçue pour alimenter/commander une ou plusieurs unités de filtration (14), qui peuvent être fixées à la structure (12). La source d'alimentation (16) est conçue pour alimenter la ou les unités de filtration (14) pour filtrer l'air contaminé provenant d'un environnement dans lequel le respirateur à purification d'air est utilisé. Une visière détachable (18) incluant un écran facial (30) est incluse. La visière (18) peut être fixée à un bord avant de la structure annulaire (12) et détachée de celui-ci de sorte que, lors de l'utilisation, la visière (18) s'étend vers le bas à partir de la structure annulaire (12) et définit un volume clos entre l'écran facial (30) et le visage de l'utilisateur ; les unités de filtration (14) sont configurées pour expulser l'air filtré vers le volume clos entre l'écran facial (30) et le visage de l'utilisateur.
PCT/EP2020/080969 2019-11-04 2020-11-04 Respirateur à air pouvant être installé sur la tête WO2021089626A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2207973.5A GB2604826A (en) 2019-11-04 2020-11-04 Head mountable air respirator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1916018.3A GB201916018D0 (en) 2019-11-04 2019-11-04 Head mountable air respirator
GB1916018.3 2019-11-04

Publications (1)

Publication Number Publication Date
WO2021089626A1 true WO2021089626A1 (fr) 2021-05-14

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822698A (en) * 1973-01-22 1974-07-09 R Guy Powered air-purifying respirator helmet
GB2541672A (en) * 2015-08-25 2017-03-01 Jsp Ltd A powered air respirator kit
CN109123875A (zh) * 2018-09-18 2019-01-04 金华市多绿奇五金制品有限公司 一种安全头盔
WO2019079162A1 (fr) * 2017-10-16 2019-04-25 Gentex Corporation Système de protection respiratoire modulaire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822698A (en) * 1973-01-22 1974-07-09 R Guy Powered air-purifying respirator helmet
GB2541672A (en) * 2015-08-25 2017-03-01 Jsp Ltd A powered air respirator kit
WO2019079162A1 (fr) * 2017-10-16 2019-04-25 Gentex Corporation Système de protection respiratoire modulaire
CN109123875A (zh) * 2018-09-18 2019-01-04 金华市多绿奇五金制品有限公司 一种安全头盔

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