EP2099532B1 - Abc-filter - Google Patents

Abc-filter Download PDF

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Publication number
EP2099532B1
EP2099532B1 EP07706211A EP07706211A EP2099532B1 EP 2099532 B1 EP2099532 B1 EP 2099532B1 EP 07706211 A EP07706211 A EP 07706211A EP 07706211 A EP07706211 A EP 07706211A EP 2099532 B1 EP2099532 B1 EP 2099532B1
Authority
EP
European Patent Office
Prior art keywords
filter
base
perforated membrane
anterior
hole
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.)
Active
Application number
EP07706211A
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English (en)
French (fr)
Other versions
EP2099532A1 (de
Inventor
Giuseppe Galli
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.)
Officine Meccaniche Galli Srl
Original Assignee
Officine Meccaniche Galli Srl
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Filing date
Publication date
Application filed by Officine Meccaniche Galli Srl filed Critical Officine Meccaniche Galli Srl
Publication of EP2099532A1 publication Critical patent/EP2099532A1/de
Application granted granted Critical
Publication of EP2099532B1 publication Critical patent/EP2099532B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B23/00—Filters for breathing-protection purposes
    • A62B23/02—Filters for breathing-protection purposes for respirators

Definitions

  • the present invention relates to the NBC protection sector, and in particular, refers to an NBC filter to be applied to the inlet of an NBC face mask.
  • Said filter may be either the type having an asymmetrical fastening, the axis of symmetry of which is off-centred with respect to the main axis of the filter itself, or the type having a centralized fastening, the axis of symmetry of which coincides with the main axis of the filter itself.
  • a first drawback of the plastic filters currently on the market is that the essentially cylindrical body of the filter is formed by two parts, one anterior and one posterior, fixed together by means of a resin-based glue, which does not ensure the stable fixing of said parts, and which are thus liable to come apart over time.
  • a further drawback is constituted by the fact that said glue releases toxic vapours inside the filter, with the risk of these being inhaled by the individual using the filter itself.
  • a third drawback is given by the fact that, as a result of shock, or the accidental dropping of the filter, its filtering capacity may be significantly reduced over time, if not indeed lost entirely.
  • the main scope of the present invention is that of providing an NBC filter made from a reinforced plastic material, preferably fibreglass, capable of resisting accidental, and even repeated shock, while at the same time maintaining its filtering capacity, and avoiding the use of adhesives which can lead to the above-described drawbacks.
  • the interior of said filter is fitted with a central pin which spaces apart two membranes, which delimit a space filled with activated charcoal particles, in order to avoid said membranes to bent outwards and give rise to empty or dead spaces, which could reduce the filtering activity of said particles and thus the filtering capacity of the filter itself.
  • the anterior and posterior parts, forming the filter body are hot blade welded together so that said parts are stably fixed together, avoiding any gluing which can give rise to the above-described drawbacks.
  • the essentially cylindrical body of the NBC filter 1 consists of two parts, anterior A and posterior B.
  • the anterior part A comprises a base A1, fitted with an asymmetrical fastening 2 and a valve pusher 3, a first perforated membrane 4, an area 5 containing the activated charcoal particles, with a pin 6 passing through centrally, and a second perforated membrane 7, while the posterior part B comprises a first perforated disk 11, an antiaerosol pack 12 constituted by a glass microfibre paper cartridge, a second perforated disk 13, and a base B1 with an inlet hole fitted with a plug 14 of known type.
  • the asymmetrical fastening 2 of the filter 1 is essentially constituted by a cylindrical collar which protrudes from the base A1 and is positioned so that part of its outer perimeter is aligned with the outer edge of the filter 1 ( figure 3A ).
  • the valve' pusher 3 is inserted into a dedicated through hole 8 in the base A1 which is located inside the asymmetrical fastening 2 and runs parallel to it.
  • Said valve pusher 3 is essentially constituted by a cylindrical collar protruding from the base A1 along the inner edge of which are a series of radiating equidistant fins 9 protruding below, and facilitating the correct positioning of said valve pusher 3 inside the through hole 8, by inserting it in appropriate "U" shaped housings 21, as will be explained in more detail below ( figures 2A and 2B ).
  • valve pusher 3 is welded into place.
  • Each of the perforated membranes 4 and 7 delimiting the activated charcoal area 5 is lined internally with a non-woven fabric 10.
  • a ring-shaped end-stop 15 which is held in place by a plurality of small teeth projecting from the inner surface of the side wall of the anterior part A, along the edge of the same.
  • the second perforated membrane 7 is fixed to the anterior part A held pressed against an inner edge 16 which arises from the inner face of the anterior part A, a short distance from its free end, and which runs parallel to it.
  • the central pin 6 is interposed between the first perforated membrane 4 and the second 7, and maintains the distance between said membranes, which in the case of shock and/or accidental dropping, with the membranes being bent outwards, could increase, giving rise to dead spaces, which, as already been mentioned, could reduce the filtration capacity of the filter 1.
  • the base A1 has an internal surface with a plurality of ribs 20 running radially with respect to the centre of the through hole 8 into which the valve pusher 3 is inserted, channelling the air towards the valve pusher 3 itself ( figure 3B ) .
  • each rib 20 increases towards the through hole 8.
  • each rib extends from the edge of the base A1 to the through hole 8, in the close proximity to which, the free end of each rib has a "U" shaped housing 21 which, as already been mentioned, can house a corresponding fin 9 from the valve pusher 3 when the latter is inserted.
  • the base A1 has two protruding lugs 18 at 90° to one another with respect to the centre of the through hole 8 acting as visual and tactile points of reference for the user, both for the correct insertion of the filter 1 onto the inlet of the NBC face mask, and for the direction of rotation which allows the user to fix said filter onto the inlet itself ( figure 3A ) .
  • said lugs are "L" shaped, with the long sides oriented radially with respect to the fastening 2 of the filter 1, and continuing downwards along the side surface of the filter 1 itself, stopping halfway along said surface, while the short sides are perpendicular to the former, giving the direction of rotation for a bayonet connector.
  • the lugs 18 are a contrasting colour from that of the filter 1.
  • the posterior base B1 is fitted with an entry hole which is closed off by a central rubber stopper 14 which must be removed by the user in order to use the filer itself ( figure 4 ).
  • the two parts, anterior A and posterior B are fixed together by means of hot blade welding which, following the melting of the contact seams, stably fixes the free ends together, thus making a single body without the use of any adhesives.
  • the NBC filter envisages a filter 1 the base of which A1 is fitted with a central fastening 2' not according to the invention the axis of symmetry of which coincides with the main axis of the filter itself.
  • Said central fastening 2' is essentially constituted by a cylindrical collar with threading around the outer edge.
  • the central fastening 2' does not have the four fins distributed angularly around the inner edge, also the outer edge lacks the further two opposite facing fins and the two housings formed in the ribbed protrusions.
  • the base A1 lacks the valve pusher 3 and the lugs 18.
  • the antiaerosol pack 12 is fixed and sealed onto the posterior base B1 by means of non-toxic glue.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Networks Using Active Elements (AREA)
  • Fats And Perfumes (AREA)

Claims (15)

  1. NBC Filter (1) vom Typ, welcher zwei Teile aufweist, ein Vorderteil (A) und ein Hinterteil (B), die aneinander befestigt sind, wobei das Vorderteil (A) eine Basis (A1), eine asymmetrische Befestigung (2), deren Symmetrieachse bezüglich der Hauptachse des Filters versetzt ist, eine erste perforierte Membran (4), einen Bereich (5), welcher Aktivkohlepartikel enthält, und eine zweite perforierte Membran (7) aufweist, während das Hinterteil (B) eine erste perforierte Platte (11), ein Anti-Aerosolpack (12), das aus einem Glasmikrofasereinsatz gebildet ist, eine zweite perforierte Platte (13) und eine Basis (B1) mit einer Einlassöffnung aufweist, dadurch gekennzeichnet, dass die Einlassöffnung mit einem bekannten Stopfen (14) versehen ist, und dass, um ein Nach-Außen-Durchbiegen der ersten perforierten Membran (4) und/oder der zweiten perforierten Membran (7) zu verhindern, ein zentrischer Stift (6) vorgesehen ist, welcher beim Durchlaufen des Bereiches (5), einen konstanten Abstand zwischen den beiden Membranen aufrechterhält, wodurch es ermöglicht wird, dass der Filter auch wiederholt einem Stoß oder einem unbeabsichtigten Herunterfallen standhält, während gleichzeitig die Filterkapazität intakt erhalten bleibt; wobei die asymmetrische Befestigung (2) des Filters (1) im Wesentlichen durch eine zylindrische Manschette bereitgestellt wird, welche von der Basis (A1) hervorsteht und so angeordnet ist, dass ein Teil ihrer Außenkante mit der Kante des Filters (1) ausgerichtet ist.
  2. Filter (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Befestigung (2) vier Lamellen, die an ihrer Innenkante abwinkelt angeordnet sind, ferner zwei an ihrer Außenkante gegenüberliegende Lamellen, und zwei Gehäuse aufweist, die in den rippenförmigen Vorsprüngen ausgebildet sind.
  3. Filter (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass er einen Ventildrücker (3) aufweist, der in eine geeignete Durchgangsöffnung (8) in der Basis (A1) eingeführt ist; wobei der Ventildrücker (3) innerhalb der Befestigung (2) angeordnet und mit dieser koaxial ausgerichtet und angeschweißt ist.
  4. Filter (1) nach den vorhergehenden Ansprüchen, dadurch gekennzeichnet, dass der Ventildrücker (3) im Wesentlichen durch eine zylindrische Manschette gebildet ist, welche von der Basis (A1) und entlang der Innenkante hervorsteht, von welcher eine Reihe radialer Lamellen (9) in gleichem Abstand voneinander vorgesehen und ausgebildet sind, um eine korrekte Positionierung des Ventildrückers (3) selbst in dem geeignet "U"-förmigen Gehäuse (21) innerhalb der Durchgangsöffnung (8) zu ermöglichen.
  5. Filter (1) nach Anspruch 1, dadurch gekennzeichnet, dass beide, die erste perforierte Membran (4) und die zweite perforierte Membran (7), innen mit einem nicht gewebten Stoff (10) ausgekleidet sind.
  6. Filter (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Vorderteil (A) ein freies Ende aufweist, welches an dem korrespondierenden freien Ende des Hinterteils (B) mittels Warmschildschweißen verbunden ist, durch Schmelzen der sich in Kontakt befindlichen Lagen, was die Teile (A) und (B) stabil befestigt, wodurch ein einziger Körper gebildet wird.
  7. Filter (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass zum Erleichtern des Haltens durch einen Benutzer, welcher Handschuhe trägt, das freie Ende der Seitenwand des Teils (A) und das des Teils (B) hervorstehend ist bezüglich der korrespondierenden Seitenwände, so dass, wenn einmal zusammen geschweißt, ein kreisförmiger Vorsprung oder Absatz erzeugt wird, der von dem Körper des Filters (1) vorsteht.
  8. Filter (1) nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass die zweite perforierte Membran (7) an dem Vorderteil (A) befestigt ist und gegen eine Innenkante (16) gedrückt gehalten wird, welche an der Innenfläche des Vorderteils (A) in einem kurzen Abstand von dessen freien Ende beginnt und parallel zu diesem verläuft.
  9. Filter (1) nach Anspruch 4, dadurch gekennzeichnet, dass die Basis (A1), um den Luftstrom von außen über den gesamten Bereich (5) zu verteilen, eine Innenfläche mit einer Vielzahl von Rippen (20) aufweist, die radial bezüglich der Mitte der Durchgangsöffnung (8) angeordnet sind, welche geeignet sind, um Luft zu dem Ventildrücker (3) zu leiten.
  10. Filter (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Höhe jeder Rippe (20) in Richtung der Durchgangsöffnung (8) zunimmt.
  11. Filter (1) nach einem der Ansprüche 9 oder 10, dadurch gekennzeichnet, dass jede der Rippen (20) sich von der Kante der vorderen Basis (A1) zu der Durchgangsöffnung (8) erstreckt, wobei, an dem freien Ende jeder "U"-förmige Gehäuse (21) vorgesehen sind, die geeignet sind zum Aufnehmen der Lamellen (9) des Ventildrückers (3); wobei die Anzahl der Rippen (20), welche die Durchgangsöffnung (8) erreichen, gleich der Anzahl der Lamellen (9) ist.
  12. Filter (1) nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die äußere Basis (A) zwei in einem Winkel beabstandete Vorsprünge (18) aufweist, welche geeignet sind als visuelle und taktile Bezugselemente für den Benutzer zu dienen, wobei beide vorgesehen sind für das korrekte Aufstecken des Filters (1) auf den Einlass einer NBC Gesichtsmaske und für die Drehrichtung, die dem Benutzer erlaubt, den Filter auf dem Einlass selbst zu befestigen.
  13. Filter (1) nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Vorsprünge (18) im Wesentlichen "L"-förmig sind, wobei zwei lange Seiten, die radial zu der asymmetrischen Befestigung (2) des Filters (1) verlaufen, sich nach unten entlang der Seitenfläche des Filters (1) erstrecken, und auf halbem Weg entlang der Oberfläche stoppen, während die kurzen Seiten im Wesentlichen senkrecht zu den langen Seiten ausgebildet sind.
  14. Filter (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Anti-Aerosolpack (12) in dem Filter (1) durch einen nicht-toxischen Kleber befestigt und abgedichtet ist.
  15. Filter (1) nach den vorhergehenden Ansprüchen, gekennzeichnet durch ein ringförmiges Anschlagelement (15), welches durch eine Vielzahl von kleinen Zähnen gehalten wird, die von der Innenfläche der Seitenwand des Vorderteils (1) hervorstehen und entlang der Kante desselben verlaufen.
EP07706211A 2007-01-05 2007-01-05 Abc-filter Active EP2099532B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000011 WO2008081489A1 (en) 2007-01-05 2007-01-05 Nbc filter

Publications (2)

Publication Number Publication Date
EP2099532A1 EP2099532A1 (de) 2009-09-16
EP2099532B1 true EP2099532B1 (de) 2011-04-20

Family

ID=38521042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07706211A Active EP2099532B1 (de) 2007-01-05 2007-01-05 Abc-filter

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Country Link
EP (1) EP2099532B1 (de)
AT (1) ATE506106T1 (de)
DE (1) DE602007014095D1 (de)
WO (1) WO2008081489A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2387474C1 (ru) * 2008-11-25 2010-04-27 Открытое акционерное общество "Электростальское научно-производственное объединение "Неорганика" (ОАО "ЭНПО "Неорганика") Противогазовый фильтр
ITRM20130309A1 (it) * 2013-05-29 2014-11-30 Ohg Galli Srl "elemento filtrante antiaerosol per maschere nbc dotato di attivita' antimicrobica"
US9999546B2 (en) 2014-06-16 2018-06-19 Illinois Tool Works Inc. Protective headwear with airflow
US11812816B2 (en) 2017-05-11 2023-11-14 Illinois Tool Works Inc. Protective headwear with airflow
IL263915B (en) * 2018-12-23 2022-03-01 Beth El Zikhron Yaaqov Ind Ltd Filtration systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2825424A (en) * 1950-12-22 1958-03-04 William E Gross Gas mask canisters
US4548626A (en) * 1984-04-30 1985-10-22 Figgie International Inc. Particulate air filter assembly
US5038775A (en) * 1988-01-04 1991-08-13 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Canadian Government Plastic scrim
GB2254017B (en) * 1991-03-26 1994-05-11 Sabre Safety Ltd Respirator filters
KR100375045B1 (ko) * 1998-06-23 2003-06-09 한국전력공사 재활용이용이한방독면정화통의제조및재활용방법
AU759053B2 (en) * 1998-11-17 2003-04-03 Harbrae Holdings Pty Limited Filter
US7419526B2 (en) * 2005-03-03 2008-09-02 3M Innovative Properties Company Conformal filter cartridges and methods

Also Published As

Publication number Publication date
DE602007014095D1 (en) 2011-06-01
WO2008081489A1 (en) 2008-07-10
EP2099532A1 (de) 2009-09-16
ATE506106T1 (de) 2011-05-15

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