[go: up one dir, main page]

WO1990005565A1 - Ameliorations relatives a des masques de protection - Google Patents

Ameliorations relatives a des masques de protection Download PDF

Info

Publication number
WO1990005565A1
WO1990005565A1 PCT/GB1989/001366 GB8901366W WO9005565A1 WO 1990005565 A1 WO1990005565 A1 WO 1990005565A1 GB 8901366 W GB8901366 W GB 8901366W WO 9005565 A1 WO9005565 A1 WO 9005565A1
Authority
WO
WIPO (PCT)
Prior art keywords
hood
fan
motor
wearer
protective hood
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.)
Ceased
Application number
PCT/GB1989/001366
Other languages
English (en)
Inventor
John Michael Devereux De La Pena
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.)
WOODVILLE POLYMER ENGINEERING Ltd
Original Assignee
WOODVILLE POLYMER ENGINEERING 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 WOODVILLE POLYMER ENGINEERING Ltd filed Critical WOODVILLE POLYMER ENGINEERING Ltd
Publication of WO1990005565A1 publication Critical patent/WO1990005565A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
    • A62B17/04—Hoods

Definitions

  • the invention relates to a protective hood which is capable of protecting the wearer from the effects of heat and smoke and noxious fumes in the event of a fire or from the effects of toxic or irritant gases such as might escape during a leakage or spillage in, for example, a laboratory, chemical plant or factory.
  • hoods of this type which is pulled over the head in one action and is donnable in any orientation while still providing filters against gases and smoke particles across the nose and mouth of the wearer.
  • hoods of this type the wearer inhales air through the filter which absorbs toxic fumes or irritant gases and blocks smoke particles.
  • Exhaled gases, CO 2 and water vapour leave the hood, either by passing back through the filter or by a passage through specially provided exhaust vents or valves.
  • Unfortunately there is always a considerable amount of dead-space within the protective hood, especially if the wearer is small, in which exhaled gases accumulate and are not easily expelled. This accumulation results in an increasing carbon dioxide level which can cause distress to the wearer as well as 'misting up' and a generally unpleasant environment.
  • a protective hood in accordance with the invention comprises a bag-like head covering of a heat- resistant, and/or gas-impermeable sheet material, the bag being transparent over at least the area which in use falls in front of the eyes of the wearer and having one or more filter pads
  • sealing means being provided at the mouth of the bag to create a seal around the neck of the wearer when donned
  • the hood is fitted with at least one motor-driven fan, which is adapted to facilitate removal of accumulating exhaled gases within the hood, while preventing the ingress of smoke and fumes therethrough and power means to drive the motor, the fan and power means being arranged in the hood in such manner that power is supplied to the motor automatically when the hood is first donned.
  • electrical switch means is connected in a circuit with the fan and power means and is adapted to be operated automatically by the action of a wearer in unpacking the hood or donning it so that the power means is connected to the fan.
  • the switch means may be a reed switch provided with a small magnetic strip which is located adjacent to the switch so as to hold the switch in an open condition when the hood is packed ready for use, and which is automatically removed from the vicinity of the switch and causes the switch to close when the hood is unpacked for donning by the wearer.
  • the reed switch and magnetic strip may be secured to different portions of the hood which are folded together when the hood is packed, but which are moved apart as the hood is unpacked.
  • electrical contacts of the motor may be separated by a strip of insulating material to prevent a connection being made with the power means before the hood is donned, the insulating strip being attached to the hood in such a way that, on donning of the hood, the strip is removed from the contacts, the connection between the power means and the motor thus being made to instantly drive the fan.
  • the insulating strip may, for example, be one end of a tape of a non- elastic material, such as, for example, PVC, the other end of the tape being attached to the hoodin a tensioned manner at a point distant from the insulating strip so that the stretching of the hood which is necessary on donning results in the removal of the strip from the contacts.
  • the other end of the tape to that which provides the insulating strip is attached to the neck sealing means.
  • the fan is therefore operated automatically by the action of unpacking and/or donning the hood so there is no need for the wearer to assimilate any instructions for switching on the fan and yet he or she is instantaneously provided with the full protective benefit of the hood.
  • the venting of the waste gases by the fan assures comfort for the wearer for the duration of the emergency.
  • the ingress of smoke and fumes through the fan itself is preferably prevented by a one-way exhalation valve which closes when the wearer inhales and opens when the wearer exhales. The exhalation valve functions in this manner even when the motor is not operating and thus in the event of failure of the motor, for any reason, smoke and fumes cannot enter the protective hood via the fan unit.
  • the power means is one or more lithium batteries having very small dimensions, for example, about 10mm long by 10mm in diameter.
  • the fan and motor are preferably combined in a single cylindrical unit also having small dimensions.
  • the unit may be between 40 to 60mm in length and 18 to 25mm in diameter.
  • the small size of the combined motor and fan unit and the batteries allows them to be easily incorporated into a 'bag- type' protective hood without unduly increasing the weight, bulkiness or ability to be folded and stored in a small space.
  • the hood it is preferable for the hood to be fitted with two fan and motor units there being a separate power supply for each one.
  • the fan may be capable of both axial and centrifugal air-flow and have a total air/waste gas through-put of 70 litres per minute.
  • a method of exhausting exhaled gases from a protective hood of the bag-like type comprises fitting the bag with at least one motor-driven fan and with power means to drive the motor, the fan being adapted to remove gases from the inside of the hood to the
  • the bag-like head covering is preferably made from a film material, preferably transparent, which, depending on the particular application of the hood, has chemical and/or heat resistance.
  • the hood may be constructed from more than one suitable material. Particularly suitable films are those made from polyimide, polycarbonate, polyurethane, polyvinyl chloride, polyester and high density polyethylene.
  • the sheet-material of the. hood may be additionally coated with a heat- reflective coating such as gold and/or nickel and aluminium.
  • the sealing means at the mouth of the bag which provides a seal around the neck of the wearer is preferably a flexible diaphragm of any suitable elastic, substantially gas impermeable sheet material such as, for example, latex rubber, silicon rubber, butyl rubber or neoprene.
  • a particularly preferred diaphragm material is a flame-retardant polyurethane.
  • the filter pad or pads are preferably multi-layered and of a soft flexible material tc allow the hood to be easily folded and stored.
  • a suitable construction might be a first or outer layer of a flame-proof, spark- resistant material such as, for example, non- activated charcoal cloth, a second layer of an electrostatically charged polycarbonate non-woven mat, a third layer of an 'activated' charcoal cloth and a fourth or inner layer of a flame-proof, spark- resistant material such as, for example, non- activated charcoal cloth, a second layer of an electrostatically charged polycarbonate non-woven mat, a third layer of an 'activated' charcoal cloth and a fourth or inner layer of a flame-proof, spark- resistant material such as, for example, non- activated charcoal cloth, a second layer of an electrostatically charged polycarbonate non-woven mat, a third layer of an 'activated' charcoal cloth and a fourth or inner layer of a flame-proof, spark- resistant material such as, for example, non- activated charcoal cloth, a second layer of an electrostatically charged polycarbonate non-woven mat, a third layer of an 'activated' charcoal cloth and
  • the hood may be provided with catalyst packs to convert carbon monoxide to carbon dioxide , which is then exhausted by the fan.
  • the protective hoods in accordance with the invention may be made available for use in
  • Figure 1 is a front view of a protective hood in accordance with the invention when in use
  • Figure 2 is an enlarged schematic view of the mechanism for operating the fan
  • Figure 3 is a longitudinal cross-section through the combined fan and motor unit.
  • Figure 4 is a top view of a stator blade showing the degree of curvature
  • Figure 5 is a part sectional elevation of the fan rotor and blades
  • Figure 6 is a front view of a protective hood according to an alternative embodiment of the invention.
  • Figure 7 is a longitudinal cross-section through the fan and motor unit used in the protective hood of Figure 6.
  • the bag comprises a bag-like head covering 2 made of a transparent film which can be pulled over the head of the wearer 4.
  • the bag is usually constructed from front and back panels which are joined at seams 6 and are reinforced by tapes 8.
  • the mouth of the bag is fitted with a diaphragm 10 of an elastic, gas impermeable sheet material which can be easily stretched to pass over the head to don the hood but then contracts to provide a seal around the wearer's neck.
  • a multi-layer filter pad 12 is attached across the bag 2 in a position such that it is in alignment with the nose and mouth of the wearer when the hood is donned. Apertures (not shown) are provided in the film across the area where the filter is attached so that air can pass through the filter into the hood when the wearer inhales.
  • the filter pad 12 may be annular, stretching around the whole circumference of the bag 2 or, two or more pads may be arranged around the hood in such a way that the hood can be safely donned in any orientation.
  • Two cylindrical combined fan and motor units 14 are vertically positioned at the bottom, on either side of the hood, the end of the units in which the fan is disposed protruding through the
  • Each fan-and motor unit 14 is provided with a compartment 16 which contains a lithium battery.
  • the connection between the motor and the battery is seen schematically in. Figure 2.
  • the battery 18 has its positive terminal 20 uppermost and its negative terminal 22 resting on the positive terminal 24 of the motor 26. Provision for the connection between the negative terminal 30 of the motor 26 and positive terminal 20 of the battery 18 is made by means of an extending wire 28.
  • insulating strip 32 is one end of a tape of non- elastic material 34 (see Figure 1).
  • the other end of this tape 34 is attached tc the flexible diaphragm 10 and 35 on the opposite side of the hood to the fan and motor unit 14 with which it is connected.
  • the effect is to pull the insulating strip 32 from between the positive terminals 20 of the batteries and the end of wires 28 vhich are connected to the negative terminals 30 of the two motors 26.
  • power is instantaneously supplied to the motors 26 to drive the fans as the hood is donned.
  • the construction of the fan 36 is seen more clearly in Figures 3, 4 and 5.
  • the motor 26 and the fan 36 are disposed in a common cylindrical housing 38.
  • the housing 38 extends above the motor 26 to provide a
  • the far. 36 comprises a stator insert 40 which is attached to the housing 38 by means of eight curved stator blades 42.
  • the dimensions of the stator blade sections vary linearly between the root and the tip. The precise curvature of the stator blades is shown in Figure 4.
  • the fan 36 further comprises a rotor 44 which is mounted on the motor spindle 46.
  • the rotor 44 bears nine curved fan blades 48 (see Figure 5) the blade section of each one, as with the stator blades, varying linearly between the root and the tip.
  • the blades 48 are arranged such that the 40% chord point of each blade lies in the same radial plane.
  • the fan blade sections have a semicircular leading edge and are a constant thickness between this edge and the 70% chord point.
  • waste gases are drawn from the hood through intake window 50 and blown by the rotor blades 48 through the stator blades 42 to the exterior of the hood taking both an axial and centrifugal path.
  • the back-flow of noxious gases through the fan into the hood is prevented by means of a one-way exhalation valve 52 which moves from the open position shown at 52b to the closed position shown at 52a in Figure 3 when the wearer inhales.
  • the valve 52 functions in this manner even when the motor is not operating.
  • the fan components and housing will be injection moulded of a suitably light material such as for example, glass-filied nylon to minimise the final weight of the
  • FIG. 6 and 7 An alternative embodiment of the invention is illustrated in Figures 6 and 7 in which a combined fan and motor unit 54 incorporates a battery 58 and a reed switch 60 so that the switch connects the battery to the motor 62 under the control of a magnetic strip 64.
  • the magnetic strip 64 is connected via a short length of flexible tape 66 to a point on the hood 68 just above a corner of the filter pad 70 and above the fan and motor unit 54 so that when the hood is folded on itself into a pack ready for use, the magnetic strip 64 lies adjacent to the unit 54 and can be located inside the housing 72 of the unit 54 against the reed switch 60 and held lightly in place thereon by adhesive.
  • the magnetic strip 64 serves to held the reed switch 60 in an open position in which it disconnects the battery 58 from the motor 62.
  • the magnetic strip 64 is automatically pulled away from switch 60 causing the switch to close and connect the battery 58 to the motor 62.
  • the motor 62 is therefore powered by the battery 58 and drives the fan rotor 74 to extract waste gases from the hood.
  • the combined fan and motor unit 54 is illustrated in Figure 7.
  • the fan rotor 74 is similar to the fan rotor 44 in Figure 3 except that it is mounted on top of the motor 62 with the motor housed within the stator 76 downstream of the rotor 74.
  • the battery 58 is supported in a case 78 that is attached beneath the stator 76 within the outer housing 72.
  • the negative terminal 80 of the battery 58 is connected to the positive terminal 82 of the motor 62, and the positive terminal 84 of the battery is connected via the reed switch 60 to the negative terminal 86 of the motor, the reed switch being located within the case 78 and on the side of the battery 58.
  • the magnetic strip 64 when it is located adjacent to the switch 60 in the packed state of the hood, is attached lightly by adhesive to the outer surface of the case 78 within the housing 72.
  • a one-way exhalation valve 88 is provided between the stator 76 and the housing 72 so as to operate in the same manner as the valve 52 in Figure 3.
  • the fan and motor unit for use in accordance with this invention can each provide an air/waste gas through-put of up to 70 litres per minute.
  • the average respiratory volume of a sedentary adult is about 8 litres/min and rises to 75 to 80 litres/min during moderate to high activity and even to 100 litres/min at very high work rates.
  • a single fan unit could provide adequate waste gas clearance for most emergency situations and therefore the provision of two fans merely provides extra capacity to ensure the comfort of the wearer during either very high activity or prolonged wear.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Toxicology (AREA)
  • Pulmonology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

Un masque protecteur utilisé soit en cas d'incendie soit comme protection contre un dégagement de gaz irritants dans un environnement industriel, comprend un couvre-tête (2) analoguue à un sac en matière thermo-résistante et/ou imperméable au gaz, se présentant sous la forme de feuille. Ledit sac est transparent sur au moins la surface qui, lors de l'utilisation, tombe devant les yeux de l'utilisation, et comporte un ou des tampons (12) de filtrage positionnés pour couvrir le nez et la bouche du porteur de manière que ce dernier peut respirer à travers lesdits tampons. On a prévu un moyen de scellement (10) au niveau de la bouche dudit sac afin de créer un joint d'étanchéité autour du cou du porteur, lorsque ledit sac est porté. Ledit sac est équipé d'au moins un ventilateur (14) à moteur aidant à éliminer les gaz exhalés accumulés à l'intérieur dudit masque, ainsi que d'un moyen d'alimentation (18) actionnant le moteur, ledit ventilateur et ledit moyen d'alimentation étant agencés dans ledit masque de sorte que le moteur est alimenté en courant automatiquement lorsque le masque est défait ou lorsqu'il vient d'être revêtu.
PCT/GB1989/001366 1988-11-17 1989-11-16 Ameliorations relatives a des masques de protection Ceased WO1990005565A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888826864A GB8826864D0 (en) 1988-11-17 1988-11-17 Improvements in & relating to protective hoods
GB8826864.4 1988-11-17

Publications (1)

Publication Number Publication Date
WO1990005565A1 true WO1990005565A1 (fr) 1990-05-31

Family

ID=10646990

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/001366 Ceased WO1990005565A1 (fr) 1988-11-17 1989-11-16 Ameliorations relatives a des masques de protection

Country Status (4)

Country Link
EP (1) EP0413775A1 (fr)
JP (1) JPH03503249A (fr)
GB (2) GB8826864D0 (fr)
WO (1) WO1990005565A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146636A (en) * 1989-10-05 1992-09-15 Pena John M D De Heat and smoke protective hood
US5214803A (en) * 1992-02-19 1993-06-01 David Shichman Smoke hood
US5214800A (en) * 1990-04-27 1993-06-01 Christopher Braun Collapsible, flexible head wear
WO1999013946A1 (fr) * 1997-09-15 1999-03-25 Protector Technologies B.V. Appareil respiratoire a utiliser en cas d'urgence
WO2004073445A1 (fr) * 2003-02-24 2004-09-02 Lee, Soon-Jae Sac a dos comportant une fonction de masque a gaz
WO2014035641A2 (fr) 2012-08-31 2014-03-06 3M Innovative Properties Company Appareil d'échappement électrique pour un dispositif respiratoire de protection personnelle
CN103656900A (zh) * 2013-12-18 2014-03-26 无锡同春新能源科技有限公司 安装纳米防雾薄膜观察窗和微型空气净化器的防雾霾面具
CN103656908A (zh) * 2013-12-18 2014-03-26 无锡同春新能源科技有限公司 带纳米级二氧化钛光催化网微型空气净化器的防雾霾面具
CN103656901A (zh) * 2013-12-18 2014-03-26 无锡同春新能源科技有限公司 带纳米级二氧化钛光催化网微型空气净化器的防雾霾头盔
WO2014081788A2 (fr) 2012-11-22 2014-05-30 3M Innovative Properties Company Appareil d'échappement électrique pour un dispositif respiratoire de protection personnelle
WO2015084255A1 (fr) 2013-12-04 2015-06-11 Singapore Technologies Dynamics Pte Ltd Système de ventilation active et dispositifs contenant un système de ventilation active
KR20170001425U (ko) * 2015-10-13 2017-04-21 주식회사 진아산업 방진용 마스크
EP3077064A4 (fr) * 2013-12-04 2017-07-19 Innosparks Pte Ltd Système de ventilation active et dispositifs contenant un système de ventilation active
US11202925B1 (en) * 2021-04-21 2021-12-21 Wadie M. Awad Full face and head mask
US12213553B2 (en) 2020-10-13 2025-02-04 Gilz Llc Head protection with integrated air filtration
US12263361B2 (en) 2018-07-23 2025-04-01 Dyson Technology Limited Wearable air purifier
US12311204B2 (en) 2018-07-23 2025-05-27 Dyson Technology Limited Wearable air purifier

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9018569D0 (en) * 1990-08-23 1990-10-10 Sabre Safety Ltd Respiratory protective apparatus
GB2257346B (en) * 1991-07-12 1995-05-10 S M Alexander Protective hood
US6834646B2 (en) * 2001-12-19 2004-12-28 Testa Technologies T.T. Ltd. Respiratory hood
US6892725B2 (en) * 2002-04-26 2005-05-17 Mine Safety Appliances Company Protective hoods and neck seals for use therein
JP2007275190A (ja) * 2006-04-04 2007-10-25 Shigematsu Works Co Ltd 電動ファン付き呼吸用保護具
GB2575814B (en) * 2018-07-23 2020-12-09 Dyson Technology Ltd A wearable air purifier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204101B (de) * 1962-07-26 1965-10-28 Wilhelm Bender Staubschutzeinrichtung fuer die vom Motor-Geblaeserad eines Elektrohandgeraets, insbesondere Handschleifgeraets, von einem Filterkasten ueber einen biegsamen Schlauch angesaugte Kuehlluft
FR2220133A5 (fr) * 1973-03-01 1974-09-27 Delest Rene
US4116237A (en) * 1977-02-07 1978-09-26 Norman Birch Emergency breathing apparatus
US4583535A (en) * 1980-08-07 1986-04-22 Saffo John J Protection mask

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204101B (de) * 1962-07-26 1965-10-28 Wilhelm Bender Staubschutzeinrichtung fuer die vom Motor-Geblaeserad eines Elektrohandgeraets, insbesondere Handschleifgeraets, von einem Filterkasten ueber einen biegsamen Schlauch angesaugte Kuehlluft
FR2220133A5 (fr) * 1973-03-01 1974-09-27 Delest Rene
US4116237A (en) * 1977-02-07 1978-09-26 Norman Birch Emergency breathing apparatus
US4583535A (en) * 1980-08-07 1986-04-22 Saffo John J Protection mask

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146636A (en) * 1989-10-05 1992-09-15 Pena John M D De Heat and smoke protective hood
US5214800A (en) * 1990-04-27 1993-06-01 Christopher Braun Collapsible, flexible head wear
US5214803A (en) * 1992-02-19 1993-06-01 David Shichman Smoke hood
WO1993016760A1 (fr) * 1992-02-19 1993-09-02 David Shichman Casque de protection contre la fumee
WO1999013946A1 (fr) * 1997-09-15 1999-03-25 Protector Technologies B.V. Appareil respiratoire a utiliser en cas d'urgence
US6460538B1 (en) 1997-09-15 2002-10-08 Protector Technologies B.V. Emergency escape breathing apparatus
WO2004073445A1 (fr) * 2003-02-24 2004-09-02 Lee, Soon-Jae Sac a dos comportant une fonction de masque a gaz
WO2014035641A3 (fr) * 2012-08-31 2014-11-20 3M Innovative Properties Company Appareil d'échappement électrique pour un dispositif respiratoire de protection personnelle
RU2622824C2 (ru) * 2012-08-31 2017-06-20 3М Инновейтив Пропертиз Компани Электрическое вытяжное устройство для средства индивидуальной защиты органов дыхания
EP3498339A1 (fr) * 2012-08-31 2019-06-19 3M Innovative Properties Company Appareil d'échappement électrique pour un dispositif respiratoire de protection personnelle
AU2016219689B2 (en) * 2012-08-31 2018-04-05 3M Innovative Properties Company Powered exhaust apparatus for a personal protection respiratory device
WO2014035641A2 (fr) 2012-08-31 2014-03-06 3M Innovative Properties Company Appareil d'échappement électrique pour un dispositif respiratoire de protection personnelle
WO2014081788A2 (fr) 2012-11-22 2014-05-30 3M Innovative Properties Company Appareil d'échappement électrique pour un dispositif respiratoire de protection personnelle
EP3077064A4 (fr) * 2013-12-04 2017-07-19 Innosparks Pte Ltd Système de ventilation active et dispositifs contenant un système de ventilation active
WO2015084255A1 (fr) 2013-12-04 2015-06-11 Singapore Technologies Dynamics Pte Ltd Système de ventilation active et dispositifs contenant un système de ventilation active
CN103656900A (zh) * 2013-12-18 2014-03-26 无锡同春新能源科技有限公司 安装纳米防雾薄膜观察窗和微型空气净化器的防雾霾面具
CN103656901A (zh) * 2013-12-18 2014-03-26 无锡同春新能源科技有限公司 带纳米级二氧化钛光催化网微型空气净化器的防雾霾头盔
CN103656908A (zh) * 2013-12-18 2014-03-26 无锡同春新能源科技有限公司 带纳米级二氧化钛光催化网微型空气净化器的防雾霾面具
KR20170001425U (ko) * 2015-10-13 2017-04-21 주식회사 진아산업 방진용 마스크
KR200485149Y1 (ko) 2015-10-13 2017-12-01 주식회사 진아산업 방진용 마스크
US12263361B2 (en) 2018-07-23 2025-04-01 Dyson Technology Limited Wearable air purifier
US12311204B2 (en) 2018-07-23 2025-05-27 Dyson Technology Limited Wearable air purifier
US12213553B2 (en) 2020-10-13 2025-02-04 Gilz Llc Head protection with integrated air filtration
US11202925B1 (en) * 2021-04-21 2021-12-21 Wadie M. Awad Full face and head mask

Also Published As

Publication number Publication date
EP0413775A1 (fr) 1991-02-27
JPH03503249A (ja) 1991-07-25
GB8925936D0 (en) 1990-01-04
GB8826864D0 (en) 1988-12-21
GB2226490A (en) 1990-07-04

Similar Documents

Publication Publication Date Title
WO1990005565A1 (fr) Ameliorations relatives a des masques de protection
US6948191B2 (en) Personal protective suit with partial flow restriction
US6796304B2 (en) Personal containment system with sealed passthrough
EP0876830B1 (fr) Masque de protection respiratoire améliorée
RU2566910C2 (ru) Полнолицевая маска для электроприводного воздухоочистительного респиратора (papr)
US5115804A (en) Protective hood and oral-nasal mask
EP1786523B1 (fr) Appareil de fourniture d'air respirable et de protection du corps dans un environnement contamine
US4116237A (en) Emergency breathing apparatus
US6763835B1 (en) Chemical/biological special operations mask
US20060048777A1 (en) Apparatus and method for providing breathable air and bodily protection in a contaminated environment
JPS58500393A (ja) 救命系及び新鮮な空気を閉止域に供給する方法
US20210205640A1 (en) Portable gas supply device and respiratory assistance system
JP3921295B2 (ja) 呼吸保護具
US7712151B2 (en) Inflatable protective enclosure
JPS6068869A (ja) 呼吸保護器
US20030192536A1 (en) Personal containment system with isolated blower
CN214260402U (zh) 一种消防呼吸防护自救器
EP0197641B1 (fr) Dispositif de protection contre décompression et fumée toxique
CN212347481U (zh) 一种森林消防员紧急呼吸器
JPH0191872A (ja) 酸素発生形呼吸用保護具収納体
EP0327643B1 (fr) Cagoule de protection et masque destine a couvrir le nez et la bouche
SE447792B (sv) Anordning vid skyddsmask
CA1326805C (fr) Casque protecteur et masque bucco-nasal
Burgess An improved air-purifying respirator
JPS62277973A (ja) 火災時の避難用防災マスク

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1989913213

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1989913213

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1989913213

Country of ref document: EP