EP0474372A2 - Appareil de protection respiratoire - Google Patents

Appareil de protection respiratoire Download PDF

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Publication number
EP0474372A2
EP0474372A2 EP91307307A EP91307307A EP0474372A2 EP 0474372 A2 EP0474372 A2 EP 0474372A2 EP 91307307 A EP91307307 A EP 91307307A EP 91307307 A EP91307307 A EP 91307307A EP 0474372 A2 EP0474372 A2 EP 0474372A2
Authority
EP
European Patent Office
Prior art keywords
hood
moving means
filter
air moving
protective apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91307307A
Other languages
German (de)
English (en)
Other versions
EP0474372A3 (en
Inventor
John Bryan Richards
Thomas William Norbron
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.)
Sabre Safety Ltd
Original Assignee
Sabre Safety 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
Priority claimed from GB909018569A external-priority patent/GB9018569D0/en
Priority claimed from GB909018681A external-priority patent/GB9018681D0/en
Application filed by Sabre Safety Ltd filed Critical Sabre Safety Ltd
Publication of EP0474372A2 publication Critical patent/EP0474372A2/fr
Publication of EP0474372A3 publication Critical patent/EP0474372A3/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/04—Couplings; Supporting frames
    • 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
    • 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

Definitions

  • This invention relates to respiratory protective apparatus and more particularly to respiratory protective apparatus for delivering filtered air to a person wearing the apparatus in a noxious atmosphere.
  • respiratory protective apparatus comprising a flexible hood capable of enveloping the head of an adult wearer, a neck seal at an open lower edge of the hood for engaging the neck of an adult wearer, an air moving means and a filter, both mounted to a wall of the flexible hood with the air moving means located within the flexible hood and the filter located outside the flexible hood, the air moving means and the filter being in communication through an aperture in the wall of the flexible hood, and a source of power connected to the air moving means for driving the air moving means to suck air from the ambient atmosphere through the filter to fill the space within the hood.
  • Respiratory protective apparatus in accordance with the present invention provides a continual supply of clean, filtered air to the wearer of the flexible hood without the need for employing an inhale valve or a source of breathable gas.
  • the supply of filtered air to the wearer of the flexible hood maintains a positive pressure within the hood preventing the ingress of noxious gases past the neck seal.
  • Respiratory protective apparatus need not include an exhale valve in the wall of the hood when the neck seal permits sufficient leakage of gas from the interior of the hood.
  • an efficient neck seal for example when the neck seal is constituted by a septum of a highly elastic polymer such as silicone or polyurethane, leakage past the neck seal is so low that an exhale valve must be included in a wall of the hood permitting gas pressures generated within the hood to be relieved to atmosphere.
  • an inhale valve may optionally be included in the aperture to establish uni-directional flow.
  • the neck seal comprises an elasticated band through which there is threaded a draw string, the ends of which are provided with a toggle for securing the draw string to maintain the neck seal in any desired position.
  • the neck seal may be a septum of a polymer material having an elasticity high enough to provide an effective seal around necks of varying diameters.
  • Preferred embodiments of the present invention provide respiratory protective apparatus which may be used to protect a person of any age from an infant to an adult.
  • the respiratory protective apparatus incorporates a neck seal which is an elasticated band with a draw string and a toggle
  • the hood is placed over the upper half of the infant's body and the draw string tightened round the waist of the infant and secured by the toggle to prevent noxious gases from the atmosphere entering the space enclosed within the hood.
  • This space is fed with air drawn by the air moving means through the filter and cleaned of noxious substances which may be nuclear, biological or chemical.
  • the respiratory protective apparatus when the respiratory protective apparatus according to the present invention includes a neck seal which is a septum of highly elastic polymer material, the elasticity of the neck seal is such that it will readily engage and provide efficient seal around the waist of an infant or the neck of any adolescent child or any adult.
  • Respiratory protective apparatus is therefore adaptable for use by a person of any age and when used on an infant provides access to the lower part of the infant's body, for example for changing a nappy, without any risk of the upper torso and respiratory tract of the infant receiving noxious gases from the atmosphere.
  • the filter and the air moving means each includes a threaded mounting means, one of said mounting means being internally threaded and the other of said mounting means being a co-operating externally threaded mounting means enabling the filter and the air moving means to be mounted in the aperture by screwing the respective threaded mounting means into engagement.
  • the source of power is carried on the head of an adult wearer wearing the flexible hood of respiratory protective apparatus according to the present invention.
  • the source of power may be carried directly on the hood, in an external pocket on the wall of the flexible hood or the source of power may be carried indirectly on the hood by being carried between the filter and the air moving means.
  • the source of power comprising a plurality of batteries may be mounted in a housing surrounding the engaged cooperated threaded means and mounted between the filter and the aperture in the hood.
  • the carrying of a power source in an external pocket on the wall of the hood or in a housing mounted on the engaged cooperating threaded mounting means is very convenient when a small power pack designed for providing positive pressure inside the hood for a period, for example, of two hours is used.
  • the power pack may be arranged to be supported independently of the hood, for example on the belt of an adult wearer.
  • respiratory protective apparatus which comprises a transparent flexible hood, a neck seal at a lower open edge of the transparent flexible hood, a ring housing defining an aperture in a wall of the flexible hood, an air moving means comprising a fan/motor unit mounted in the ring housing with the fan inside the transparent flexible hood, the air moving means having a threaded portion extending through the ring housing, a filter having a threaded portion corresponding to the threaded portion of the air moving means, the filter being mounted externally of the transparent flexible hood by screwing the threaded portion of the filter to the threaded portion of the air moving means such that the filter and the air moving means are in direct communication through the aperture, a power pack supported on the hood, and means connecting the power pack to the air moving means whereby the air moving means sucks air from a noxious ambient atmosphere through the filter to fill the space within the transparent flexible hood while the neck seal engages the neck of an adult wearer of the hood
  • ear surrounds are provided for at least partially encircling the ears of the wearer of the transparent flexible hood.
  • the ear surrounds are designed to baffle the noise of the motor of the air moving means and make it easier for the wearer to hear when spoken to.
  • the respiratory protective apparatus illustrated in Figure 1 comprises a flexible hood 1 which is a clear lightweight hood and may be made, for example, of PVC or a bilaminar polymer, the latter being preferable if the hood is to be used for protection against nucleur, biological and chemical gases.
  • the transparent flexible hood 1 includes a stiffer visor portion 2 for positioning in front of the face of a wearer to provide good visibility.
  • the flexible hood 1 has a neck seal 3 at its lower open end for engaging the neck of a wearer.
  • the neck seal comprises an elasticated band 4 through which there extends a draw string 5, the ends of which are passed through a toggle 6.
  • the neck seal may also comprise an elasticated draw string.
  • the wall of the flexible hood 1 contains an aperture defined by a ring housing 14.
  • the filter 7, which is preferably a nuclear, biological and chemical filter (NBC filter) is located outside the flexible hood 1 in front of the wearer's face whereas the air moving means 8 is located inside the flexible hood 1 as indicated by the dotted lines denoting the air moving means 8 in Figure 1.
  • NBC filter nuclear, biological and chemical filter
  • the filter 7 is a screw fit in the ring housing 14 and the air moving means 8 is mounted to the filter 7 by providing similar mating threads on each of the filter 7 and the air moving means 8 so that these can be simply screwed together in the aperture in the front wall of the flexible hood 1.
  • the flexible hood 1 further includes an external pocket 9 on a back wall of the hood 1, a compact power pack 10 capable of driving the air moving means 8 for a period of two hours being located in the pocket 9.
  • the power pack 10 is connected to the air moving means 8 by a short wire 11, a long wire 12 and a plug and socket device 13 of which the socket is connected by the short wire 11 to the power pack 10.
  • a wearer inserts the plug in the socket of the device 13, thereby energising the air moving means 8.
  • the hood 1 is placed over the head of the wearer and the air moving means 8 draws ambient air through the filter 7 and inflates the flexible hood 1 to maintain a reservoir of filtered air about the head of the wearer.
  • the air moving means 8 and the filter 7 are in direct communication without the interposition of an inhale valve.
  • some of the exhaled gas may escape through the aperture defined by the ring housing 14 and through the filter 7, notwithstanding the action of the air moving means 8. Exhaled gases also escape past the neck seal 3.
  • FIG. 2 of the accompanying drawings the respiratory protective apparatus of Figure 1 is shown in use on a baby.
  • the neck seal 3 of the hood is passed over the head, arms and shoulders of the baby, and the draw string 5 is tightened about the baby's waist and secured in the tightened position by the toggle 6.
  • the flexible hood 21 includes a stiff visor member 22 to which the flexible hood is secured in a manner to form a flat top 23 to the hood such that the visor portion stands naturally away from direct contact with the face of an adult wearer of the hood.
  • the flexible hood 21 includes a neck seal 24 constituted by a septum of a highly elastic polymer material such as silicone, polyurethane or butyl with a small circular aperture 25 located therein.
  • the diameter of the aperture 25 is less than the diameter of an infants′ waist or the neck of a child but the elastic polymer material of the septum 24 is sufficiently elastic to be extended readily around the neck of any adult and adequately grips the neck of any person or the waist of any infant child around which the flexible hood may be placed as shown in Figures 4 and 5 respectively.
  • the flexible hood 21 illustrated in Figure 3 includes an aperture defined by a ring housing 26 and an exhale valve 27 for releasing excess pressure generated within the hood on exhalation.
  • a flexible hood 21 is shown with a fan/motor unit 28 and filter 29 mounted in the aperture defined by the ring housing 26 in a similar manner to that already described with reference to Figure 1.
  • the power source comprising a number, for example four, of electric batteries is located in a housing 30 of octagonal or similar shape supported on the cooperating threaded mounting means between the fan/motor unit 28 and the filter 29.
  • the fan motor is started up by connecting together a plug and socket similar to plug and socket device 13 of the apparatus of Figure 1, before the flexible hood 21 is donned by an adult wearer, or placed over the torso of an infant child, as illustrated in Figure 5.
  • Either of the flexible transparent hoods illustrated in the accompanying drawings may be provided with ear surrounds which at least partially encircle the ears of the wearer of the transparent flexible hood.
  • the ear surrounds may be provided by external means such as a strap placeable over the head of the wearer with external ear surrounds urging the flexible hood against the ears of the wearer.
  • external means such as a strap placeable over the head of the wearer with external ear surrounds urging the flexible hood against the ears of the wearer.
  • Such ear surrounds having the effect of baffling the noise of the motor of the air moving means, so making it easier for the wearer of the hood to converse with another person.
  • the ear surrounds may be incorporated in the hood itself and be fixed to the internal wall of the flexible hood with a suitable curved stiffener in the hood to maintain the ear surrounds in contact with the ears of the wearer or with the head of the wearer near the ears.
  • the flexible hood may have an aperture at one or both ears thereby enabling speech or other sounds outside the hood to reach the wearer direct while wearing the respiratory protective apparatus.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Pulmonology (AREA)
  • Toxicology (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
EP19910307307 1990-08-23 1991-08-08 Respiratory protective apparatus Withdrawn EP0474372A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9018569 1990-08-23
GB909018569A GB9018569D0 (en) 1990-08-23 1990-08-23 Respiratory protective apparatus
GB9018681 1990-08-24
GB909018681A GB9018681D0 (en) 1990-08-24 1990-08-24 Respiratory protective apparatus

Publications (2)

Publication Number Publication Date
EP0474372A2 true EP0474372A2 (fr) 1992-03-11
EP0474372A3 EP0474372A3 (en) 1992-05-27

Family

ID=26297550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910307307 Withdrawn EP0474372A3 (en) 1990-08-23 1991-08-08 Respiratory protective apparatus

Country Status (2)

Country Link
EP (1) EP0474372A3 (fr)
IL (1) IL99239A0 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699894A1 (fr) * 1992-12-29 1994-07-01 De Buyer Herve Conteneur isotherme.
GB2294882A (en) * 1994-11-11 1996-05-15 Warrick Ian Gorman Self rescuer apparatus
GB2301039A (en) * 1995-05-24 1996-11-27 Protector Techn Ltd Emergency escape breathing apparatus
US6796304B2 (en) 2002-04-12 2004-09-28 3M Innovative Properties Company Personal containment system with sealed passthrough
US6948191B2 (en) 2002-04-12 2005-09-27 3M Innovative Properties Company Personal protective suit with partial flow restriction
EP2211997A4 (fr) * 2007-11-20 2014-10-01 Avon Protection Systems Inc Respirateur purificateur d'air alimenté modulaire
CN111111040A (zh) * 2020-02-18 2020-05-08 李星 呼吸防护头罩
CN111790072A (zh) * 2020-07-24 2020-10-20 上海宝亚安全装备股份有限公司 一种微正压自吸过滤式逃生呼吸器
US11166497B1 (en) 2021-04-16 2021-11-09 Larin Company Protective headgear
WO2021224861A1 (fr) * 2020-05-07 2021-11-11 Airen Srl Dispositif de protection individuelle à face pleine ventilée
WO2023110157A1 (fr) * 2021-12-13 2023-06-22 Gama Healthcare Limited Dispositif respiratoire

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH216065A (de) * 1938-12-30 1941-07-31 Heinrich Dr Draeger Otto Vorrichtung zum Schutze von Kleinkindern gegen chemische Kampfstoffe.
US2896617A (en) * 1955-11-03 1959-07-28 Wesley A Gibbons Air supplied hood structure
US3033199A (en) * 1959-10-13 1962-05-08 Jacobs Clifford Roy Closure for protective device
US4583535A (en) * 1980-08-07 1986-04-22 Saffo John J Protection mask
FR2556226A1 (fr) * 1983-12-09 1985-06-14 Ulmer Aeronautique Cagoule de protection
GB2215615B (en) * 1988-03-21 1991-12-18 Sabre Safety Ltd Breathing apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699894A1 (fr) * 1992-12-29 1994-07-01 De Buyer Herve Conteneur isotherme.
GB2294882A (en) * 1994-11-11 1996-05-15 Warrick Ian Gorman Self rescuer apparatus
GB2301039A (en) * 1995-05-24 1996-11-27 Protector Techn Ltd Emergency escape breathing apparatus
FR2734487A1 (fr) * 1995-05-24 1996-11-29 Protector Technologies Limited Appareil respiratoire de sauvetage d'urgence
US5690095A (en) * 1995-05-24 1997-11-25 Protector Technologies Limited Emergency escape breathing apparatus
GB2301039B (en) * 1995-05-24 1999-07-14 Protector Technologies Limited Emergency escape breathing apparatus
US6796304B2 (en) 2002-04-12 2004-09-28 3M Innovative Properties Company Personal containment system with sealed passthrough
US6948191B2 (en) 2002-04-12 2005-09-27 3M Innovative Properties Company Personal protective suit with partial flow restriction
EP2211997A4 (fr) * 2007-11-20 2014-10-01 Avon Protection Systems Inc Respirateur purificateur d'air alimenté modulaire
CN111111040A (zh) * 2020-02-18 2020-05-08 李星 呼吸防护头罩
WO2021224861A1 (fr) * 2020-05-07 2021-11-11 Airen Srl Dispositif de protection individuelle à face pleine ventilée
CN111790072A (zh) * 2020-07-24 2020-10-20 上海宝亚安全装备股份有限公司 一种微正压自吸过滤式逃生呼吸器
US11166497B1 (en) 2021-04-16 2021-11-09 Larin Company Protective headgear
WO2023110157A1 (fr) * 2021-12-13 2023-06-22 Gama Healthcare Limited Dispositif respiratoire

Also Published As

Publication number Publication date
EP0474372A3 (en) 1992-05-27
IL99239A0 (en) 1992-07-15

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