WO2016182604A1 - Dispositif permettant de réduire la concentration en dioxyde de carbone d'air inhalé - Google Patents

Dispositif permettant de réduire la concentration en dioxyde de carbone d'air inhalé Download PDF

Info

Publication number
WO2016182604A1
WO2016182604A1 PCT/US2015/068269 US2015068269W WO2016182604A1 WO 2016182604 A1 WO2016182604 A1 WO 2016182604A1 US 2015068269 W US2015068269 W US 2015068269W WO 2016182604 A1 WO2016182604 A1 WO 2016182604A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
housing
adsorbent
port
ventilation port
Prior art date
Application number
PCT/US2015/068269
Other languages
English (en)
Inventor
Stephen Cox
Original Assignee
Wolf, Geoffrey
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 Wolf, Geoffrey filed Critical Wolf, Geoffrey
Publication of WO2016182604A1 publication Critical patent/WO2016182604A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/22—Carbon dioxide-absorbing devices ; Other means for removing carbon dioxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B19/00—Cartridges with absorbing substances for respiratory apparatus

Definitions

  • the present device relates to a portable, handheld chemical adsorbent system/device for reducing anxiety and the symptoms of panic attacks through the reduction of inhaled carbon dioxide.
  • Anxiety is a term used generally to describe several disorders whose symptoms include apprehension, fear, and nervousness either as an abnormal response to an environmental condition or sometimes without a precursor stressor. Mild anxiety is vague and unsettling, while severe anxiety can be extremely debilitating, having a serious impact on daily life.
  • GAD Generalized Anxiety Disorder
  • GAD is a chronic disorder characterized by excessive, persistent anxiety about nonspecific life events, objects, and situations and GAD is diagnosed when a person worries excessively about a variety of everyday problems for at least 6 months.
  • GAD sufferers often feel afraid and worry about their health, money, family, work, or school, but they have trouble both identifying the specific fear and controlling the worries. Their fear is usually unrealistic or out of proportion with what may be expected in their situation.
  • Sufferers expect failure and disaster to the point that it interferes with daily functions like work, school, social activities, and relationships.
  • a panic attack is a sudden episode of intense fear that triggers severe physical reactions when there is no real danger or apparent cause.
  • Panic attacks and anxiety are complex conditions of which little is known about their physiological triggers. It is believed that some individuals possess a hypersensitivity to elevated C0 2 levels that should normally be tolerated by healthy individuals.
  • C0 2 The removal of C0 2 from air typically relies upon a chemical adsorbent to remove the undesired constituent from air and is commonly referred to as CO2 scrubbing.
  • Porous inorganic metal oxides such as alkali metals or alkali-earth metals providing alkalinity have also been widely incorporated for C0 2 capture.
  • lithium and calcium based materials are preferred as effective C0 2 adsorbents because of their high adsorption capacity.
  • CO 2 scrubbing techniques include chemical absorption through alkanolamine-based absorbents, ionic liquid-based absorbents, and blended absorbents. Additional methods incorporate physical adsorbents such as carbonaceous materials, e.g. activated carbon and graphene, zeolite, ordered mesoporous silica, e.g. M41 s, SBA-n, and AMS and metal-organic frameworks. Chemical adsorbents include lithium materials, e.g. LiOH and U2O2, calcium materials, e.g. Ca(OH) 2 , and amine-based materials.
  • physical adsorbents such as carbonaceous materials, e.g. activated carbon and graphene, zeolite, ordered mesoporous silica, e.g. M41 s, SBA-n, and AMS and metal-organic frameworks.
  • Chemical adsorbents include lithium materials, e.g. LiOH and U2O2, calcium materials
  • the subject device of the present application is a handheld scrubber utilized to remove undesired constituents from air prior to inhalation,
  • the device is primarily utilized to reduce the concentration of C0 2 in inhaled air so as to inhibit the onset of anxiety or to provide a fast-acting intervention during the onset of anxiety or panic attacks among those afflicted with a hypersensitivity to C0 2 .
  • a disproportionate tracheal/blood C0 2 ratio may induce a signal to the locus ceruleus-amygdala alarm and fear centers of the brain resulting in anxiety or even panic attacks in persons predisposed to such afflictions, Higher CO2 levels have also been shown to impair the qualify of higher order brain functions in persons without these afflictions, The desire to escape an environment detected to be rich in CO2 is believed to be a physiological response common in mammals.
  • the hypersensitive response to elevated C0 2 levels is rapidly reversible once the C0 2 concentration falls below that required to induce the response.
  • a person so afflicted from a confined environment e.g. a moving car, poorly ventilated work space or classroom, a crowded elevator, or an airplane.
  • time may be of the essence and the afflicted person may need to rapidly overcome the effect to focus on the task or decision at hand.
  • a handheld air scrubber that can be carried in a pocket, briefcase, or purse has been developed which employs a chemical adsorbent to remove substantial quantities of CO2 from air inhaled through the device until the adsorbent bed contained therein is substantially depleted.
  • the device possesses valves to direct inhaled air across the adsorbent bed and to provide an alternative channel for exhaled air so as to direct C0 2 rich expirations out of the device without passing back across the adsorbent bed.
  • Other undesired constituents may a!so be removed from air by selecting the appropriate absorbents and/or adsorbents.
  • FIG. 1 depicts a perspective view of a preferred embodiment of the handheld air scrubber.
  • FIG. 2 depicts a perspective view of a preferred embodiment of the filter cartridge housing.
  • FIG, 3 depicts an exploded perspective view of a preferred embodiment of the handheld air scrubber, filter cartridge housing, and filter cartridge.
  • FIG. 4 depicts a cross sectional view of a preferred embodiment of the handheld air scrubber along the proximal-distal (A - A') axis.
  • FIG. 5 depicts a perspective view of the front of a preferred embodiment of the handheld air scrubber.
  • FIG. 6 depicts a partial cross sectional perspective view of the rear of a preferred embodiment of the handheld air scrubber depicting the adsorbent cartridge disposed therein.
  • FIG. 7 summarizes research results into the effect of elevated C02 levels on human decision making.
  • FIG. 8 depicts a cross-sectional view of the adsorbent cartridge.
  • FIG. 9 depicts a cross-sectional view of a single adsorbent sheet.
  • a handheld air scrubber device 100 for short term use is depicted in FIGS. 1-6 and 8-9.
  • the handheld air scrubber device 100 possesses a housing 50 comprised of a first lateral casing 40 and a second lateral casing 45 which are joined at the casing joint 47.
  • the present application is directed to the disclosure of a handheld device 100 utilized to remove undesired constituents from ambient air immediately prior to its inhalation.
  • This device is particularly useful in enclosed environments where these undesired constituents, e.g. C0 2 and CO, can accumulate to produce deleterious effects on humans who inhale such contaminants.
  • the process of purifying air is commonly known as "scrubbing.” Scrubbing C0 2 from inhaled air is useful to treat the onset of anxiety and panic attacks.
  • exposure to elevated levels of indoor CO2 has been shown to impair human decision making.
  • the use of the disclosed device is believed to not only alleviate some symptoms of the onset of anxiety and panic attacks, but is also believed to improve decision making by reducing the concentration of CO2 in inhaled air,
  • a common method for scrubbing is through the use of chemical adsorbents 80 to remove undesired constituents as air comes into contact with a sufficient quantity of that adsorbent 80.
  • the efficiency of the scrubbing process depends on the duration a given volume of air is in contact with an unsaturated adsorbent 80, i.e. residence time, the efficiency of the adsorbent 80 itself in removing the undesired constituent irrespective of time, and the rate of removal of the undesired constituent from air when in contact with the adsorbent 80.
  • the handheld air scrubber 100 possesses a ventilation port 5 at the distal end of ventilation port sheath 6 that is placed in the mouth of the user and through which air is inhaled from the housing 50 along the inhalation route 60, and exhaled through the device 100 along the exhalation route 70.
  • Inhaled air is drawn into the housing 50 through the inhalation port 17 as the user inhales and creates a vacuum.
  • a plurality of inhalation ports 17 are utilized at the housing base 43.
  • the inhaled air enters the air treatment chamber 30 as it passes through the inhalation ports 17 at the housing base 43.
  • the air treatment chamber 30 houses the air treatment device 88 which acts to scrub undesired constituents from the air.
  • the air treatment device 100 housed within the air treatment chamber 30 is an adsorbent cartridge 90.
  • the air treatment chamber 30 further possesses a means to secure the adsorbent cartridge 90 in a fixed position within the housing 50.
  • the air treatment chamber 30 is partially defined by first air treatment chamber wall interior surface 36 of the first air treatment chamber wall 48 and the second air treatment chamber wall interior surface 38 of the second air treatment chamber wall 49 of the lateral casings 40, 45 to mechanically hold the cartridge 90 in place in a friction fit arrangement.
  • the air treatment chamber 30 further possesses base cartridge stops 58 extending into the air treatment chamber 30 so as to lift the cartridge 90 off of the inhalation ports 17.
  • the air treatment chamber 30 further possesses a top cartridge stop 59 extending into the air treatment chamber 30 from the base 43 so as to set an upper limit for the movement of the cartridge 90 within the air treatment chamber 30.
  • the inhaled air is drawn through the inhalation ports 17 and through the cartridge 90 within the air treatment chamber 30.
  • the air treatment chamber 30 is sealed at the top by a chamber ceiling 32.
  • An internal inlet port 27 connects the air treatment chamber 30 to the transverse air duct 20 running from the anterior face 42 to the posterior face 46 of the device 100.
  • An inlet valve 7 opens and closes the internal inlet port 27 by rotating above the inlet valve 7 and up and distaily through the transverse air duct 20 about an inlet valve hinge 8 sited at the distal end of the internal inlet port 27.
  • the inlet valve 7 is a flapper type valve with dowels 55 which are received into dowel seats 57 within the housing 50.
  • the inlet valve 7 rests on an inlet valve stop 9 which acts to prevent the inlet valve 7 from rotating into the air treatment chamber 30, At rest the inlet valve 1 seats against and seals the internal inlet port 27.
  • the outlet valve 11 rests on an outlet valve stop 12 which acts to prevent the outlet valve 11 from rotating proximally into the transverse air duct 20 and over the inlet valve 7.
  • the outlet valve 11 acts to seal the outlet port 25 during inhalation. Sealing the outlet port 25 during inhalation ensures that a sufficient vacuum is created to draw air into the transverse air duct 20 from the air treatment chamber 30 and open the inlet valve 7.
  • the outlet valve 11 is a flapper type valve 53 with dowels 55 which are received into dowel seats 57 within the housing 50. At rest, the outlet valve 11 seats against the outlet port 25 within the transverse air duct 20 and prevents air from being inhaled through the exhaust port, bypassing the adsorbent cartridge 90. [0031 ] During exhalation, this seals the air treatment chamber 30 and directs exhaled air through the transverse air duct 20 and against the outlet valve 11. The pressure of the exhaled air forces the outlet valve 11 open and allows exhaled air to exit the housing 50 through the exhaust port 13. Exhaled air is prevented from entering the air treatment chamber 30 and traversing the adsorbent cartridge 90 to avoid premature depletion of the adsorbent 80 by unnecessary exposure to constituents of the exhaled air.
  • the inlet valve 7 and outlet valve 11 are flapper type valves which rotate about hinges 15 at the base of each valve 7, 11. At rest, the inlet valve 7 lies closed against the top of the air treatment chamber 30 so as to seal the internal inlet port 27.
  • the inlet valve 7 opens due to the vacuum within the transverse air duct 20 and permits air to flow from the inhalation ports 17 across the cartridge 90 in the air treatment chamber 30, through the inlet valve 7, and into the transverse air duct 20.
  • the vacuum also acts to close the outlet valve 11 which seals the outlet port 25.
  • Inhaled air follows the inhalation path 60 and exits the ventilation port 5 into the mouth of the user via the ventilation port sheath 5.
  • the housing 50 is preferably constructed of a rigid material such as a plastic to protect the Integrity of the adsorbent sheets.
  • the inlet valve 7 and outlet valve 11 are likewise constructed of a rigid material.
  • the housing 50 is preferably molded into two lateral casings 40, 45 which are joined about a casing joint 47.
  • the adsorbent 80 is preferably retained on a planar adsorbent support 31. Dustless preparations of commercially available adsorbents are preferred so as to avoid issues with the inhalation of adsorbent 80. Dustless adsorbents 80 are especially preferred when alkali metals and alkali earth metals containing adsorbents 80 are utilized due to the potential for chemical burns or when toxic adsorbents 80 are employed.
  • the adsorbent support 31 is constructed of a card stock or other sufficiently rigid
  • the adsorbent 80 is retained on each support 31 in parallel vertical rows 85 across one face of the support 31.
  • these supports 31 When stacked together, these supports 31 are arranged so that the adsorbent rows 85 on each support 31 lie adjacent to the planar surface of an adjacent support 31.
  • This arrangement when supports 31 are tightly stacked together to form an adsorbent cartridge 90, uses the empty rows created from the open spaces between adsorbent rows 85 as adsorbent cartridge ventilation channels 83 through which air is inhaled and contacts the adsorbent 80 for the removal of C0 2 or other contaminants.
  • there is sufficient volume in the cartridge ventilation channels 83 to minimize the pressure differential across the cartridge 90
  • the thickness of the adsorbent cartridge 90 is optimized to ensure a tight fit within the air treatment chamber 30 so as to ensure sufficient air flow through the adsorbent cartridge 90 rather than around the adsorbent cartridge 90.
  • the supports 31 are bound together to fix each sheet's relative position within the adsorbent cartridge 90.
  • the air treatment chamber 30 utilizes top cartridge stops 59 to ensure that a head space is preserved by preventing the adsorbent cartridge 90 from moving up toward the internal inlet port 27.
  • the air treatment chamber 30 also possesses base cartridge stops 58 to ensure that some space is maintained between the bottom of the adsorbent cartridge 90 and the air treatment chamber floor 35.
  • the air treatment chamber floor 35 possesses a plurality of inhalation ports 17 through which air enters the housing 50 during inhalation. Some space between the bottom of the adsorbent cartridge 90 and the inhalation ports 17 assists in inhibiting foreign objects from contacting the adsorbent supports and adsorbent rows in a way that could potentially dislodge some adsorbent 80 from the supports 31.
  • the adsorbent cartridge housing 99 i.e. filter cartridge cradle 99, retains the filter cartridge 90, i.e. adsorbent cartridge 90.
  • the filter cartridge 90 is retained within the filter cartridge housing 99 by a filter cartridge cap 110.
  • the adsorbent cartridge housing 90 possesses a substantially rectangular support floor 96 from which support stops 95 extend vertically from each comer on the proximal side of said support floor 96 along with side cartridge guides 93 and end cartridge guides 97 which serves to retain and position the adsorbent cartridge 90. It is important to keep the absorbent sheets 91 properly aligned to keep the filter ventilation channels 83 open and unobstructed and to minimize the pressure differential ( ⁇ ) across the cartridge 90.
  • the ventilation channels 83 minimize the pressure differential by keeping all or most of the channels 83 open and contiguous across the cartridge 90. While if is important to keep the sheets 91 properly aligned aiong their edges, it is also important to prevent them from moving along the proximal-distal axis, i.e. up-and-down within the cartridge cradle 99 as they could shift and cause channels 83 to be blocked.
  • the distal side of said support floor 96 is in contact with the air treatment chamber first side wall 49 on one side of the air treatment chamber 30 which acts to tension the filter cartridge cradle 99, i.e. removable filter cartridge housing, and filter cartridge 90 against a second air treatment chamber wall 48.
  • the filter cartridge cap 110 possesses a series of cap legs 112 and cap tabs 114 to both position the cap 110 and to retain the filter cartridge 90 so as to inhibit movement of the filter cartridge 90.
  • the filter cartridge cap 110 possesses a cartridge roof 116 having an interior face 117 adjacent to the filter cartridge 90 and an exterior face 118.
  • the filter cartridge cap 110 and cradle 99 act to retain the filter cartridge 90 so as to inhibit movement within the filter cartridge cradle 99.
  • the filter cartridge cradle 99 and filter cartridge cap 110 further act to inhibit movement of the filter cartridge 90 within the housing 50 by engaging the side walls 48, 49 and stops 9, 58 within the housing 50.
  • the snug fit of the filter cartridge 90 within the air treatment chamber 30 against the interior walls 36, 38 minimizes or eliminates the amount of air flowing around the filter cartridge 90, thus remaining untreated prior to inhalation.
  • the device 100 will be disposable, with the housing 50 being supplied pre-loaded with an adsorbent cartridge 90.
  • the device 100 is further anticipated to be sold in sealed packaging.
  • the packaging could be vacuum sealed or possess an inert atmosphere such as N ⁇ .
  • the seam 47 between the lateral casings 40, 45 is sonically welded or otherwise sealed.
  • the housing 50 is preferably comprised of a composition of polypropylene and a thermoplastic elastomer.
  • the housing 50 is formulated to be resistant to attack by the adsorbent 85.
  • the composition of the housing 50, the filter cartridge cradle 99, and the filter cartridge cap 110 is substantially 2/3 polypropylene and 1/3 thermoplastic elastomer.

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

Le problème décrit par la présente invention est que des crises d'anxiété peuvent souvent être limitées ou éliminées en réduisant la concentration de dioxyde de carbone inhalé. La solution de l'invention concerne un dispositif portable pour réduire la concentration en dioxyde de carbone de l'air inhalé en utilisant des feuilles empilées comportant des rangées d'adsorbants déposées sur celles-ci et qui forment un dispositif de traitement d'air. La cartouche est placée dans un logement de cartouche d'adsorbant pour fixer la cartouche au sein du logement de dispositif et pour maintenir des canaux de ventilation à travers la cartouche. L'air inhalé traverse la cartouche contenant l'adsorbant et l'air expiré quitte le dispositif à travers une dérivation afin d'éviter un empoisonnement de l'adsorbant avec le dioxyde de carbone expiré.
PCT/US2015/068269 2015-05-08 2015-12-31 Dispositif permettant de réduire la concentration en dioxyde de carbone d'air inhalé WO2016182604A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201514707084A 2015-05-08 2015-05-08
US14/707,084 2015-05-08

Publications (1)

Publication Number Publication Date
WO2016182604A1 true WO2016182604A1 (fr) 2016-11-17

Family

ID=57248410

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/068269 WO2016182604A1 (fr) 2015-05-08 2015-12-31 Dispositif permettant de réduire la concentration en dioxyde de carbone d'air inhalé

Country Status (1)

Country Link
WO (1) WO2016182604A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5771885A (en) * 1996-02-22 1998-06-30 Tri-Pact Enterprises, Inc. Exercise filter
US7329307B2 (en) * 2004-01-28 2008-02-12 Micropore, Inc. Method of manufacturing and using enhanced carbon dioxide adsorbent
US20090301493A1 (en) * 2008-06-10 2009-12-10 Micropore, Inc. Adsorbents and inhalation devices
US20110206572A1 (en) * 2010-01-26 2011-08-25 Micropore, Inc. Adsorbent System for Removal of Gaseous Contaminants
US20120090470A1 (en) * 2010-10-14 2012-04-19 Micropore, Inc. Adsorbent cartridge assembly with end cap

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5771885A (en) * 1996-02-22 1998-06-30 Tri-Pact Enterprises, Inc. Exercise filter
US7329307B2 (en) * 2004-01-28 2008-02-12 Micropore, Inc. Method of manufacturing and using enhanced carbon dioxide adsorbent
US20090301493A1 (en) * 2008-06-10 2009-12-10 Micropore, Inc. Adsorbents and inhalation devices
US20110206572A1 (en) * 2010-01-26 2011-08-25 Micropore, Inc. Adsorbent System for Removal of Gaseous Contaminants
US20120090470A1 (en) * 2010-10-14 2012-04-19 Micropore, Inc. Adsorbent cartridge assembly with end cap

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LU ET AL.: "Comparative study of C02 capture by carbon nanotubes, activated carbons, and zeolites.", ENERGY & FUELS, vol. 22, no. 5, 25 July 2008 (2008-07-25), pages 3050 - 3056, XP055331343, [retrieved on 20080000] *
MOCHIDA ET AL.: "Removal of SOx and NOx over activated carbon fibers", CARBON, vol. 38, no. 2, 31 December 2000 (2000-12-31), pages 227 - 239, XP002519898, [retrieved on 20000000] *

Similar Documents

Publication Publication Date Title
US4688567A (en) Gas mask
US7601189B2 (en) Filtration method and a filter device for removing impurities from the air of a limited space and an apparatus for removing carbon dioxide from the air of an air-raid shelter
EP1809388B1 (fr) Enveloppe de protection
US8480797B2 (en) Activated carbon systems for facilitating use of dimethyl sulfoxide (DMSO) by removal of same, related compounds, or associated odors
TWI645882B (zh) 淨氣式呼吸防護具的隔板裝置
US8673061B2 (en) Methods for facilitating use of dimethyl sulfoxide (DMSO) by removal of same, related compounds, or associated odors
US8413655B2 (en) Adsorbents and inhalation devices
US20030075173A1 (en) Inhalation protection apparatuses
Bien et al. Respiratory protection handbook
US6706092B2 (en) Chemical/Biological decontamination filter
US11439787B2 (en) Portable air filtration and disinfection device for a respirator system
JPS63192463A (ja) 緊急用保護フード
Khayan et al. Active carbon respiratory masks as the adsorbent of toxic gases in ambient air
US5058578A (en) Respiratory device
EP1889643A2 (fr) Respirateur complexe
US20180085548A1 (en) Device for the reduction of inhaled carbon dioxide
Khayan et al. Respiratory mask using a combination of spunbond, meltblown, and activated carbon materials for reducing exposure to CO: an in vivo study
WO2016182604A1 (fr) Dispositif permettant de réduire la concentration en dioxyde de carbone d'air inhalé
US20160089511A1 (en) Device for reducing the carbon dioxide concentration of inhaled air
US11752232B2 (en) Personalized forced air purifier
KR200285213Y1 (ko) 삽입형 간이 마스크 장치
US20230372747A1 (en) Personal protective anti-viral face mask
KR102213155B1 (ko) 공기청정기능을 구비한 비상호흡장치
JPH0611015Y2 (ja) 防護用マスク
RU2171124C1 (ru) Фильтрующий портативный самоспасатель

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: 15892054

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15892054

Country of ref document: EP

Kind code of ref document: A1