WO1996011037A1 - Dispositif de filtrage - Google Patents

Dispositif de filtrage Download PDF

Info

Publication number
WO1996011037A1
WO1996011037A1 PCT/AU1995/000656 AU9500656W WO9611037A1 WO 1996011037 A1 WO1996011037 A1 WO 1996011037A1 AU 9500656 W AU9500656 W AU 9500656W WO 9611037 A1 WO9611037 A1 WO 9611037A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtering device
mouthpiece
chamber
filter
passageway
Prior art date
Application number
PCT/AU1995/000656
Other languages
English (en)
Inventor
Philip Michael Leworthy
Anthony Gilbert Matthews
Original Assignee
Philip Michael Leworthy
Anthony Gilbert Matthews
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 AUPM8618A external-priority patent/AUPM861894A0/en
Priority claimed from AUPN3407A external-priority patent/AUPN340795A0/en
Application filed by Philip Michael Leworthy, Anthony Gilbert Matthews filed Critical Philip Michael Leworthy
Priority to AU36007/95A priority Critical patent/AU3600795A/en
Publication of WO1996011037A1 publication Critical patent/WO1996011037A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/06—Nose filters
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/10—Respiratory apparatus with filter elements
    • 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
    • A62B9/06—Mouthpieces; Nose-clips

Definitions

  • a FILTERING DEVICE FIELD OF THE INVENTION This invention relates to a filtering device, for example, portable and pocket-type filtering devices for filtering smoke, fumes, airborne particulate matter etc.
  • the device may also be used to filter airborne pathogens for subsequent diagnosis. Whilst the device will be described primarily in these contexts, it should be appreciated that it has wider application. BACKGROUND ART
  • the present invention provides a filtering device for use as a respirator and which comprises a mouthpiece that is shaped and arranged to be located in a person's mouth.
  • a chamber is formed integrally with the mouthpiece and is arranged to hold a filter, and at least one opening is provided within a wall of the chamber to permit air flow into and through the chamber.
  • a passageway connects with the chamber and extends through the mouthpiece to permit inhalation of filtered air.
  • the device has been developed primarily for use in circumstances where conventional gas masks may not be available or be convenient to wear.
  • the device can readily lend itself to situations where short-term relief may be required from smoke or fume laden air. This may arise in situations where a person requires relief from an air entrained pollutant such as smoke or a noxious vapour whilst working in or escaping from a region containing the pollutant.
  • the device can be used by firemen and fire victims to prevent smoke inhalation, by commuters and passengers in heavily polluted environments or where poisonous gas threat situations are imminent .
  • the device can be used for taking samples for diagnosis in suspected contaminated areas.
  • the device can also be used in workplace situations where noxious fumes or airborne particulate matter predominates.
  • means associated with the filtering device are provided for use in preventing or inhibiting nasal breathing.
  • These means may comprise a clamp device that is arranged to be placed on a user's nose to pinch the nares region of the nose.
  • a clamp device may be used independently of the filtering device or be formed as an integral part of the filtering device. In the former case the clamp device may be moulded integrally with a portion of the filtering device and be removed for use as and when required.
  • the means arranged to inhibit nasal breathing may be formed as an integral extension of the filtering device and be shaped and positioned to abut the user's nose in a manner to block the nasal passages when the filtering device is held in the user's mouth.
  • the extension may be formed with a pad of soft material to abut the nose or be formed with projections that enter and block the nasal passages.
  • inhalation efficiency can be improved and inadvertent or involuntary intake of matter through the nose can also be prevented or substantially eliminated.
  • the mouthpiece has a comfortable configuration.
  • the mouthpiece has a shape akin to the mouthpiece of a snorkel and/or diving respirator. The provision of such a mouthpiece can assist a user in stress release through a "biting-down" on the mouthpiece during use and can improve comfort.
  • the filter may comprise a replaceable composite filter, and the chamber is preferably located outside of the user's mouth.
  • the chamber is located in a tubular portion extending laterally (ie. to the side of the mouthpiece) in a swept-away configuration.
  • a perforate cap can be fitted to the chamber that permits flow of ambient air through the filter and into the user's mouth during normal respiration.
  • the replaceable filter may also be in the form of a substrate for retaining airborne pathogens.
  • the substrate can then be removed for subsequent diagnostic testing.
  • Figure 1 shows a plan view of one type of filtering device according to the invention
  • Figure 2 shows a side elevation view of the device of Figure 1;
  • Figure 3 shows a front view of the device of Figure i;
  • Figure 4 shows a side sectional elevation through the device of Figure 1;
  • Figure 5 shows a separate view of the nose clamp which can be moulded integrally with an end cap of the filtering device of Figure 1 but which is removable from the end cap;
  • Figure 6 shows a perspective view of another type of filtering device according to the invention.
  • Figure 7 shows an exploded perspective view of the device of Figure 6 illustrating the removal and replacement of filter cartridges for use in the filtering device;
  • Figure 8 shows a perspective schematic view of the device of Figure 6 in use
  • Figure 9 shows a perspective underside view of the device of Figure 6 in a modified configuration
  • Figure 10 shows a perspective underside view of the device of Figure 6 in a further modified configuration
  • Figure 11 shows a schematic detail in side elevation of a modification of the device of Figure 10;
  • Figure 12 shows an underside perspective detail of the modified device of Figure 11;
  • Figure 13 shows a further embodiment of a filtering device according to the invention in side perspective detail
  • Figure 14 shows a front elevation of the device of Figure 13.
  • the filtering device as illustrated in the accompanying drawings 1 to 5 comprises a plastics material moulding 10 that incorporates a mouthpiece 11 and an integrally moulded chamber 12.
  • the mouthpiece has a generally elliptical form in cross-section and is formed internally with a divided passageway 13.
  • One portion of the passageway comprises an inhalation passage 13b and it extends between the chamber 12 and an open end region 14 of the mouthpiece.
  • the other portion of the passageway 13 comprises an exhalation passage 13a and it extends from the open end region of the mouthpiece to exhaust ports 15.
  • the open end region of the mouthpiece is surrounded by a small flange 16 that may be located behind a user's teeth to prevent the device from slipping from the mouth of the user.
  • the chamber 12 has a generally cylindrical form and is arranged to receive a removable filter 17.
  • a snap-on end cap 18 is fitted to the chamber for retaining the filter 17 and the end cap has a mesh-like central region 19 to permit air flow into and through the chamber 12.
  • Air A is drawn through the end cap 18, through the filter 17 and along the inhalation passage 13b of the mouthpiece 11 during inhalation by the user. Exhausted air is directed through the exhalation passage 13a and it is exhausted through the outlet ports 15.
  • Check valves 22 and 23 are provided in wall 24 to prevent inhaled air from being drawn through the exhaust ports 15 and, similarly, to prevent exhaled air from being exhausted through the filter 17.
  • check valve 22 is a one-way valve which enables air to pass therethrough in the direction as indicated, but not in the opposite direction.
  • check valve 23 allows air to exit the device as stream E passing through the check valve in the direction indicated, but does not allow air to pass in the opposite direction.
  • filter 17 is in fact divided into three separate and removable filters, namely a particle filter 17a, an activated charcoal filter 17b, and a fine foam mesh-type filter 17c.
  • This combination of filters provides an effective particulate matter filter as well as a fume and/or gas-type filtering medium.
  • Figure 4 also shows the employment of a whistle arrangement 16 which emits a whistle sound when air exits the device through passage 13a.
  • This whistle arrangement enables a user of the device to alert others to the fact that a dangerous situation exis , without unnecessary removal of the device.
  • An open loop, generally elliptical, plastics material nose clamp 20 is moulded integrally with a surrounding flange 21 of the end cap 18 and the clamp may be broken away from the end cap as and when required, so that it may be sprung open and be positioned on a user's nose so as to close the nasal passages to inhibit nasal respiration.
  • a bridge and/or protrusions may be formed on the mouthpiece that project upwardly therefrom to engage either the nares region of a user's nose or protrude directly into the nostrils to block the same.
  • This arrangement is shown schematically in Figure 2 wherein the bridge is denoted by the letter B and the optional nostril protrusion means by the letter N. Both components B and N can be formed from an appropriate padded material.
  • the clamp is employed to prevent nasal respiration during use of the filtering device and to encourage oral respiration, to prevent a user from inadvertently breathing noxious fumes that the filter 17 is intended to trap.
  • the clamp can also be used with and arranged on the device of Figures 6 to 8.
  • a second type of filtering device comprises a moulded material 30 that incorporates a snorkel-type mouthpiece 32 and an integrally moulded filter column 34.
  • the mouthpiece 32 is preferably formed from a soft polymer or elastomeric material for comfort and ease of fit.
  • An intake head 36 is arranged at the opposing end of the filter column and incorporates a plurality of air inlets 38 opening onto a fibrous filter 40 arranged within the intake head.
  • a second fibrous filter 41 is arranged at the opposing end of the filter column to enhance filter performance.
  • the filter column 34 typically has a granulated carbon filter 42 arranged therein, with a first passage 44 extending from the filter column and opening onto the mouthpiece. This passage enables air suction to be applied to the intake head via the filter column, so that air is drawn into the mouthpiece.
  • a second passage 46 adjacent to the first passage can be provided for air exhalation; valving arrangements similar to those shown in Figure 4 above can be employed with the first and second passages. Where a second passage is not employed, the user simply exhales back out through the filter device via the first passage.
  • the nose clamp 20 described above can also be employed with the device 30 and may be snap-fitted therearound. Alternatively, the nose clamp can be suspended from the device on an attachment string or line
  • Figure 7 shows how a replaceable granular carbon filter cartridge 46 can be employed with the device 30 and demonstrates the ease of removal and replacement.
  • the cartridge can employ an expiry indicator (eg. a chemically active colour change formulation) that indicates to a user when the cartridge is full and/or requires replacement.
  • the granular carbon filter cartridge can also include, or may be in the form of, a substrate that is capable of adsorbing and retaining thereon airborne pathogens.
  • the filtering device can be worn by a user to:
  • the £ ilter cartridge can be removed and the substrate -en tested to identify the pathogen types in the contaminated region.
  • Figure 8 shows a typical in-use configuration of the device 30 showing its compact and inobtrusive arrangement. It can be seen that air intake and exhalation is directed away from the user by the swept- back configuration of the device, pointing generally towards the user's ear.
  • FIG 9 shows a modification of the device of Figure 6 which is provided with an airflow exit and saliva release valve 48.
  • This valve can be in the form of an opening which communicates with the first passage 44 to enable exhaled air to pass from the device via the valve.
  • a resilient flap 50 eg. formed from a resilient and tacky polymeric material
  • cover the valve 48 and in effect functions as a one-way valve.
  • the resilient flap is biased to cover the valve 48, but is displaced away during exhalation through the device.
  • an exit in saliva release valve 52 is provided on the end of a saliva collection chamber 54 formed integrally with the mouthpiece 32.
  • a flexible membrane 56 can be provided over the valve 52, once again to function as a one-way valve (and again would be typically formed from a resilient and tacky polymeric material) .
  • the saliva collection chamber is in communication with the first passage (but both the valve 48 and valve 52 can also be in communication with the second passage 46, shown in Figure 6) .
  • the shape of the collection chamber in Figures 7, 10 (and 11 and 12) is indicative only, and other suitable shapes such as curved or conical chambers could equally well be employed.
  • the saliva collection chamber can be formed as a detachable unit 58, with a plurality of exhaust ports 60 formed therein. As shown in Figure 12, the chamber 58 is detached to leave a release valve arrangement 52' similar to that shown in Figure 10.
  • a flexible membrane similar to membrane 56 in Figure 10 could be employed to act as a one-way valve.
  • the filtering medium 70 can be located in a helmet or cap 72.
  • a communication conduit 74 extends from the filtering medium and is pivoted at pivot point 76.
  • the continuation of the conduit 77 can be connected to a suitable mouthpiece (ie. as shown above in Figures 1 through 12) , and the mouthpiece and conduit can be pivoted between a storage position, stored within the helmet (shown in dotted outline) and an in use engaged position (as shown in Figures 13 and 14) .
  • a nose piece 78 can be formed integrally with the mouthpiece and engage the nares region of a user's nose as shown.
  • the filtering medium can also be located in the visor or in other appropriate positions within the helmet.
  • the filter as shown in Figures 13 and 14 can advantageously be employed in many work situations where immediate dust filtration protection is required, for example, by fire fighters, miners, building contractors, chemical plant operators etc.

Landscapes

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

Abstract

Un dispositif de filtrage (30) à utiliser comme inhalateur, comporte un embout buccal (32) configuré de façon à se placer dans la bouche d'une personne. Une chambre (34) faisant bloc avec l'embout buccal présente une structure permettant de recevoir un filtre (42). Une paroi de la chambre présente au moins une ouverture (38) permettant à l'air de s'écouler dans la chambre et de la traverser. En outre, un canal (44) raccordé à la chambre traverse l'embout buccal.
PCT/AU1995/000656 1994-10-06 1995-10-04 Dispositif de filtrage WO1996011037A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU36007/95A AU3600795A (en) 1994-10-06 1995-10-04 A filtering device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPM8618A AUPM861894A0 (en) 1994-10-06 1994-10-06 A filtering device
AUPM8618 1994-10-06
AUPN3407A AUPN340795A0 (en) 1995-06-06 1995-06-06 A filtering device
AUPN3407 1995-06-06

Publications (1)

Publication Number Publication Date
WO1996011037A1 true WO1996011037A1 (fr) 1996-04-18

Family

ID=25644787

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000656 WO1996011037A1 (fr) 1994-10-06 1995-10-04 Dispositif de filtrage

Country Status (1)

Country Link
WO (1) WO1996011037A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000004958A1 (fr) * 1998-07-24 2000-02-03 Fausto Ferraro Dispositif de filtre a air pourvu de moyens de serrage en forme d'embout buccal
EP1025877A1 (fr) * 1999-02-08 2000-08-09 Thierry Templai Masque de protection respiratoire à usage intermittent
WO2003035181A1 (fr) * 2001-10-24 2003-05-01 Daniel Shahaf Appareils de protection contre les inhalations
WO2005000412A1 (fr) * 2003-06-25 2005-01-06 Johannes Alexander Paulus Paul Dispositif de protection respiratoire
GB2437926A (en) * 2006-05-11 2007-11-14 Martin Harrison Personal respiratory device
EP2089114A1 (fr) * 2006-11-20 2009-08-19 Filtoro Aktiebolag Dispositif respiratoire protecteur
RU169280U1 (ru) * 2016-08-23 2017-03-13 Иван Сергеевич Тихашин Индивидуальный фильтр защиты органов дыхания
WO2021263001A1 (fr) * 2020-06-26 2021-12-30 Clear Blew Dispositifs de traitement d'air portés sur le corps et procédés de désactivation d'agents pathogènes

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231364A (en) * 1979-04-30 1980-11-04 Speshyock Fred R Respiratory control
DE3405098A1 (de) * 1984-02-14 1985-08-29 Drägerwerk AG, 2400 Lübeck Kohlenoxid-atemschutzgeraet
US4955373A (en) * 1989-10-16 1990-09-11 Maguire Iii John N Air breathing assembly and air filter attachment therein
US5058578A (en) * 1988-10-16 1991-10-22 Weiss Alvin H Respiratory device
GB2255285A (en) * 1991-04-26 1992-11-04 William George Lyne Air purifier
US5226412A (en) * 1992-07-30 1993-07-13 Winters Alva B Emergency respirator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231364A (en) * 1979-04-30 1980-11-04 Speshyock Fred R Respiratory control
DE3405098A1 (de) * 1984-02-14 1985-08-29 Drägerwerk AG, 2400 Lübeck Kohlenoxid-atemschutzgeraet
US5058578A (en) * 1988-10-16 1991-10-22 Weiss Alvin H Respiratory device
US4955373A (en) * 1989-10-16 1990-09-11 Maguire Iii John N Air breathing assembly and air filter attachment therein
GB2255285A (en) * 1991-04-26 1992-11-04 William George Lyne Air purifier
US5226412A (en) * 1992-07-30 1993-07-13 Winters Alva B Emergency respirator

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000004958A1 (fr) * 1998-07-24 2000-02-03 Fausto Ferraro Dispositif de filtre a air pourvu de moyens de serrage en forme d'embout buccal
EP1025877A1 (fr) * 1999-02-08 2000-08-09 Thierry Templai Masque de protection respiratoire à usage intermittent
FR2789318A1 (fr) * 1999-02-08 2000-08-11 Thierry Templai Masque de protection respiratoire a usage intermittent
WO2003035181A1 (fr) * 2001-10-24 2003-05-01 Daniel Shahaf Appareils de protection contre les inhalations
WO2005000412A1 (fr) * 2003-06-25 2005-01-06 Johannes Alexander Paulus Paul Dispositif de protection respiratoire
GB2437926B (en) * 2006-05-11 2011-04-06 Martin Harrison Personal respiratory device
GB2437926A (en) * 2006-05-11 2007-11-14 Martin Harrison Personal respiratory device
EP2089114A1 (fr) * 2006-11-20 2009-08-19 Filtoro Aktiebolag Dispositif respiratoire protecteur
EP2089114A4 (fr) * 2006-11-20 2009-11-25 Filtoro Aktiebolag Dispositif respiratoire protecteur
US8397726B2 (en) 2006-11-20 2013-03-19 Filtoro Aktiebolag Small size breathing protective device arranged to be held in the users mouth
RU169280U1 (ru) * 2016-08-23 2017-03-13 Иван Сергеевич Тихашин Индивидуальный фильтр защиты органов дыхания
WO2021263001A1 (fr) * 2020-06-26 2021-12-30 Clear Blew Dispositifs de traitement d'air portés sur le corps et procédés de désactivation d'agents pathogènes
US11806558B2 (en) 2020-06-26 2023-11-07 Clear Blew Body-worn air-treatment devices and methods of deactivating pathogens

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