DK157352B

DK157352B - RESPIRATORY

Info

Publication number: DK157352B
Application number: DK266787A
Authority: DK
Inventors: John Robert Feeney
Original assignee: Protector Safety Ltd
Priority date: 1985-09-26
Filing date: 1987-05-26
Publication date: 1989-12-27
Also published as: EP0276216A1; DK266787D0; GB8523795D0; FI881455A; DK266787A; AU6405886A; DK157352C; AU595840B2; FI881455A0; WO1987001950A1

Description

DK 157352 BDK 157352 B

Den foreliggende opfindelse angâr en respirator med en bægerlignede krop forbundet med et luftindl0b og et luft-udl0b og med et rundtgâende tætningselement, der er udformet sâledes, at det kan placeres hen over næsen og rundt om mun-5 den pâ brugeren, hvor tætningselementet er holdt pâ plads ved hjælp af et klemorgan, som udloseligt er forbundet med den baegerlignende krop.The present invention relates to a respirator having a beaker-like body connected to an air inlet and an air outlet and having a circumferential sealing member designed to be placed over the nose and around the mouth of the user where the sealing member is held in place by a clamping means which is releasably connected to the cup-like body.

En respirator af denne art er kendt fra tysk pa-tentskrift nr. 207.751. Den kendte respirator omfatter en 10 koplignende r0gmaske bestâende af et luftpermeabelt materia-le, gennem hvilket indândignsluften filtreres. Et sâdant filter mister hurtigt sin effektivitet og mâ derfor hyppigt skiftes. Imidlertid kan gummitætningsringen, der sorger for tætningen mellem ansigtet pâ brugeren og masken, overflyttes 15 til et nyt filter, idet den er fastholdt i en rille i kanten af filteret ved hjælp af en fjederring, der af hensyn til at udskiftningen skal være nem at foretage, opnâr tilnærmelses-vis cirkulær form. Denne form er ikke hensigtsmæssig, nâr der skal tilvejebringes en god tætning mellem masken og bru-20 gerens ansigt.A respirator of this kind is known from German Patent Publication No. 207,751. The known respirator comprises a 10 cup-like smoke mask consisting of an air-permeable material through which the breathing air is filtered. Such a filter quickly loses its efficiency and therefore must be changed frequently. However, the rubber sealing ring which provides for the seal between the face of the wearer and the mask can be transferred to a new filter, being held in a groove at the edge of the filter by means of a spring ring which, for the sake of replacement, must be easy to make. , approximates circular shape. This form is not appropriate when a good seal must be provided between the mask and the wearer's face.

Det er formâlet med den foreliggende opfindelse at tilvejebringe en respirator, hvor tætningselementet er let udskifteligt, men hvor de nævnte ulemper ikke forekommer.It is an object of the present invention to provide a respirator in which the sealing element is easily replaceable but where the disadvantages mentioned do not occur.

I henhold til opfindelsen opnâs dette formâl med en 25 respirator af den indledningsvis nævnte type, hvilken respirator er ejendommelig ved det i den kendetegnende del af krav 1 angivne. Denne udformning muliggor anvendelsen af et meget bl0dt og smidigt tætningselement, hvis gode tætningse-genskaber udnyttes bâde ved tætningen ind mod brugerens an-30 sigt og ved tætningen mellem tætningselementet og den kop, som anbringes hen over brugeres næse og mund. Nâr tætningselementet har mistet sin smidighed efter nogen ganges brug kan det let udskiftes ved adskillelse af koppen fra klemor-ganet.According to the invention, this object is achieved with a respirator of the type mentioned initially, which respirator is characterized by the characterizing part of claim 1. This design allows for the use of a very soft and supple sealing member, whose good sealing properties are utilized both at the seal in the face of the user and at the seal between the seal member and the cup placed over the nose and mouth of the user. Once the sealing element has lost its agility after some use, it can easily be replaced by separating the cup from the clamping member.

35 Fordelagtige udformninger af respiratoren if0lge op findelsen framgâr af de uselvstændige krav. Især er det hen-sigtsmæssigt, at klemorganet kan udgore en del af et beskyt-telsesorgan, der er anbragt henover udândingsventilen, sâle-35 Advantageous designs of the respirator according to the invention are evident from the dependent claims. In particular, it is desirable that the clamping member may form part of a protective member disposed over the exhalation valve, thus

DK 157352 BDK 157352 B

2 des at den sikres mod ydre bemring eller overlast, men u-middelbart kan inspiceres ved udskiftning af tætningselemen-tet.2 that it is secured against external sealing or overloading, but can be inspected immediately by replacing the sealing element.

Opfindelsen skal i det f0lgende beskrives nærmere ved 5 hjælp af et pâ tegningen vist udf0relseseksempel. PÂ tegnin-gen viser:The invention will now be described in more detail by means of an exemplary embodiment shown in the drawing. The drawing shows:

Fig. 1 en adskilt, perspektivisk afbildning af en ud-f0relsesform for en halvmaskerespirator if0lge opfindelsen, fig. 2 en adskilt afbildning fra siden delvis i snit 10 af masken vist pâ fig. 1, men uden detaljer fra selen, og fig. 3 er en afbildning set fra siden af den samlede maske.FIG. 1 is a separate perspective view of an embodiment of a half-mask respirator according to the invention; FIG. 2 is a side elevational view partly in section 10 of the mask shown in FIG. 1, but without details from the harness, and fig. 3 is a side view of the overall mask.

Den illustrerede halvmaskerespirator omfatter en bæ-gerlignende krop 1, der er formet til placering hen over 15 næsten og munden pâ brugeren, en pudelignende ansigtstætning 2 til placering pâ koppen 1, et ydre klemorgan 3, en stan-dardfilterpatron 4, en indândingsventil 18 (ikke vist pâ fig. 1, men klart vist pâ fig. 2), udândingsventiler 5 (kun én vist) og selestropper 6.The illustrated half-mask respirator comprises a beaker-like body 1 formed for placement over nearly 15 and the mouth of the user, a pillow-like face seal 2 for placement on the cup 1, an outer clamping member 3, a standard filter cartridge 4, an inhalation valve 18 ( not shown in Figure 1, but clearly shown in Figure 2), exhalation valves 5 (only one shown) and harness straps 6.

20 Koppen 1 er en stiv del st0bt i plast og udformet som en bægerformet krop 7 med en âbning 8 i en plan, forreste flade og med to âbninger 9 i en plan nedre flade. Âbningen 8 er indefter forsynet med et indvendigt gevindskâret, r0rfor-met fremspring 8a, i hvilket en luftindândingsventil 18 (se 25 fig. 2) er placeret. Ud fra siden af kanten af kroppen 7 er der en ud i ét med denne udf omet f lange 10.The cup 1 is a rigid part molded in plastic and formed as a cup-shaped body 7 with an opening 8 in a flat, front face and with two openings 9 in a flat lower face. The aperture 8 is then provided with an internally threaded, tubular projection 8a, in which an air inhalation valve 18 (see Fig. 25) is located. From the side of the edge of the body 7 there is one integral with this embodiment for long 10.

Klemorganet 3 er ogsâ en stiv del st0bt i plast og omfatter en væg 11 med en fremstâende beskyttelsesdel 12.The clamping member 3 is also a rigid part molded in plastic and comprises a wall 11 with a projecting protective part 12.

Nærmere bestemt er væggen 11 udformet til tæt at passe om-30 kring kroppen 7 bortset fra, at beskyttelsesdelen 12 vil hâve et mellemrum til den plane, nederste flade af kroppen 7 for at muligg0re placering af udândingsventilerne 5 i âbnin-gerne 9. Den nedre flade af beskyttelsesdelen 12 er opspal-tet sâledes, at luft fra ventilerne 5 kan passere.More specifically, the wall 11 is designed to fit snugly around the body 7 except that the protective portion 12 will have a gap to the planar, lower surface of the body 7 to allow placement of the exhalation valves 5 in the openings 9. The lower surface of the protective member 12 is split so that air from the valves 5 can pass.

35 Pâ klemorganet 3 findes tillige en flange 13 ud i ét med væggen 11. Endelig er der pâ væggen 11 anbragt taplig-nende fremspring 14.35 Also on the clamping member 3 is a flange 13 integral with the wall 11. Finally, on the wall 11, tabular projections 14 are arranged.

Komplementære snaplâseorganer (ikke vist) er anbragt 3Complementary snap locking means (not shown) are arranged 3

DK 15 7 3 5 2 BDK 15 7 3 5 2 B

pâ væggen 11 pâ klemorganet 3 og pâ kroppen 7 af koppen 1, hvorved klemorganet 3 kan clipses pâ koppen 1. Snaplàseorga-nerne kan være udformet pâ mange mâder. Fx kan den bægerlig-nende krop 7 hâve en kontinuerlig eller diskontinuerlig un-5 derskæring, i hvilken et tilsvarende fremspring pâ den ind-vendige flade af væggen 11 placerer sig. Med elementet 3 pâclipset pâ koppen 1 er flangerne 10 og 13 i en stilling, hvor de kan klemme flade mod flade.on the wall 11 on the clamping member 3 and on the body 7 of the cup 1, whereby the clamping member 3 can be clipped onto the cup 1. The snap-locking means can be formed in many ways. For example, the beaker body 7 may have a continuous or discontinuous undercut in which a corresponding projection on the inner surface of the wall 11 is located. With the element 3 of the clip on the cup 1, the flanges 10 and 13 are in a position where they can squeeze flat against flat.

Ansigtstætningen 2 er af den pâ fig. 1 viste form.The face seal 2 is of the embodiment shown in FIG. 1.

10 Nærmere bestemt er ringen udformet til placering pâ og rundt langs flangen 10 pâ koppen 1. Tætningen 2 er udformet med en kernering af blodt skumgummi 15 beklædt med bojeligt PVC 16, sâledes at tætningen 2 er af pudelignende konstruktion. Den-ne PVC-beklædning 16 har et skort 17 (hvis formâl skal be-15 skrives nærmere) rundt langs den indre kant af den ringlig-nende ansigtstætning og placeret sâledes, at den strækker sig indefter i forhold til denne. Bredden af skortet 17 er i det væsentlige den samme sont bredden af flangerne 10 og 13.10 Specifically, the ring is designed for placement on and around the flange 10 of the cup 1. The seal 2 is formed with a core of foamed foam rubber 15 lined with flexible PVC 16 such that the seal 2 is of pad-like construction. This PVC cover 16 has a card 17 (the purpose of which must be described in more detail) around the inner edge of the annular face seal and positioned so that it extends inwardly relative thereto. The width of the card 17 is substantially the same as the width of the flanges 10 and 13.

Samling af halvmasken sker som folger, idet det anta-20 ges, at indlobsventilen 18 og udlobsventilerne 5 er anbragt pâ plads.Assembly of the half-mask is as follows, assuming that the inlet valve 18 and the outlet valves 5 are arranged in place.

F0rst monteres ansigtstætningen 2 pâ koppen 1 ved manipulation af sk0rtet 17 pâ tætningen 2 pâ en sâdan mâde, at den overlapper flangen 10 pâ den bægerlignende krop 1. Med 25 tætningen monteret sâledes pâ koppen er en væsentlig del af tætningens ringlignende krop placeret pâ den side af flangen 10, som vender bort fra den bægerformede krop 7.First, the face seal 2 is mounted on the cup 1 by manipulating the skirt 17 on the seal 2 in such a way that it overlaps the flange 10 on the cup-like body 1. With the 25 seal mounted thus on the cup, a substantial portion of the ring-like body of the seal is placed on that side. of the flange 10 facing away from the cup-shaped body 7.

Dernæst pâclipses klemorganet 3 pâ koppen 1, hvilket sikrer, at skortet 17- fastklemmes sikkert mellem flangerne 30 10 og 13, hvorved tætningen 2 fastholdes pâ plads. Med klem organet 3 placeret pâ plads tjener beskyttelsesdelen 12 til beskyttelse af ventilerne 5 samtidig med, at luft fra venti-lerne 5 kan passere.Next, the clamping member 3 is clipped onto the cup 1, which ensures that the apron 17- is securely clamped between the flanges 30 10 and 13, thereby holding the seal 2 in place. With the clamping member 3 located in place, the protective portion 12 serves to protect the valves 5 while allowing air from the valves 5 to pass.

Samlingen kompletteres ved pâskruning af en patron 4 35 i fremspringet 8a og endelig fastgorelse af selestropperne 6 til tappene 14.The assembly is completed by screwing a cartridge 4 35 into the projection 8a and finally securing the harness straps 6 to the pins 14.

Den samlede maske bæres selvfolgelig med tætningen 2 placeret over næseryggen og rundt om munden pâ brugeren, i-The assembled mask, of course, is worn with the seal 2 placed over the nose and around the mouth of the wearer,

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4 det masken holdes pâ plads ved hjælp af selestropper 6, sont placeres rundt om nakken pâ bærerens hoved. Nâr masken bæ-res, trækker disse selestropper 6 klemorganet 3 mod ansigtet pâ brugeren, hvilket forstærker klemvirkningen.4 the mask is held in place by harness straps 6, which are placed securely around the neck of the wearer's head. When wearing the mask, these harness straps 6 pull the clamping member 3 towards the face of the wearer, which enhances the clamping effect.

5 Under indânding trækkes luft gennem (og filtreres derved af) patronen 4. Udândet luft udspyes via udl0bsventi-leme 5.5 During inhalation, air is drawn through (and thereby filtered off) the cartridge 4. Exhaled air is expelled via the outlet valves 5.

Det er uundgâeligt, at tætningen 2 vil miste sin ef-fektivitet efter gentagen brug af masken. Med den viste ma-10 skekonstruktion kan tætningen udskiftes hurtigt og let ved udlosning og fjernelse af klemorganet 3 fra koppen 1 (efter fjernelse af patronen 4 om nodvendigt), fjernelse af den garnie tætning, anbringelse af en ny og gensamling af masken. F0lgelig er der ikke behov for at kassere masken, blot fordi 15 tætningen taber sin effektivitet.It is inevitable that the seal 2 will lose its effectiveness after repeated use of the mask. With the mesh construction shown, the seal can be replaced quickly and easily by releasing and removing the clamping member 3 from the cup 1 (after removing the cartridge 4 if necessary), removing the garnish seal, applying a new and re-assembling the mask. Consequently, there is no need to discard the mask simply because the seal loses its effectiveness.

Den viste maske har en pudelignende tætning. André typer tætning kan imidlertid anvendes, fx oppustelige tæt-ninger eller tætninger med omb0jet kant.The mask shown has a cushion-like seal. However, other types of seal can be used, e.g. inflatable seals or sealed-edge seals.

Claims

1. Respirator with a beaker-like body connected to an air inlet and an air outlet and with a circumferential sealing element designed to be placed over the nose and around the mouth of the user where the sealing element is held in place by means of a clamping means releasably connected to the beaker-like body, characterized in that the beaker-like body has a cup for placement over the mouth and over the nose of the user, and a first flange extending around the the edge of the cup, where the clamping member is placed around the cup along its edge and having a second flange, a portion of the sealing element being clamped between the first and second flanges.

Respirator according to claim 1, characterized in that the cup has a front face with an opening provided with an inwardly directed, tube-shaped projection, which forms an air inlet, and which is provided with an inhalation valve.

Respirator according to claim 2, characterized in that a filter cartridge is fixed in the tubular projection.

4. Respirator according to claim 1, 25, characterized in that the cup has a flat lower surface in which an exhalation valve is located.

5. Respirator according to claim 4, characterized in that the clamping means has a protective part for protecting the exhalation valve.

Respirator according to any one of claims 1- 5, characterized in that the clamping means and the cup-like body have complementary snap-locking means for the releasable connection.

Respirator according to any one of claims 1-35 6, characterized in that the sealing element comprises a ring of blood foam rubber coated with a soft plastic material.

Respirator according to claim 7, characterized in that the soft plastic material is PVC.

9. Respirator according to any one of claims 1-8, characterized in that the clamping means is provided with a pin for securing a set of harnesses for placement around the user's neck. 10