SE125797C1

SE125797C1 -

Info

Publication number: SE125797C1
Authority: SE
Publication date: 1949-01-01

Description

Uppfinnare: W. H. Lehmberg. Inventor: W. H. Lehmberg.

Foreliggande uppfinning avser en ,anordning vid gasmasker med ett for eftergivande anliggning mot ,ansiktet avsett .ansiktsskydd, i vilket inandnings- och utandningsbppningar är& upptagna, ,och med en filterbehallare, som är lostagbart .ansluten till inandningstippningens kant .och innehaller en i huvudsak cylindrisk filterkropp med ett centralt, i huvudsak cylindriskt innerrum, varvid filterkroppen lampligen ãr hitt insatt mellan tvenne andskivor. The present invention relates to a device for gas masks with a resilient abutment against the face, in which inhalation and exhalation openings are accommodated, and with a filter container which is removably connected to the edge of the inhalation tip and contains a substantially cylindrical filter body with a central, substantially cylindrical inner space, the filter body being suitably inserted between two duct discs.

Anordningen enligt uppfinningen ãr beskaff ad pa fOljande salt: Filterkroppen innehaller i sitt centrala innerrum en cylindrisk inandningsventil med ventiloppningar pa mantelytan. Denna ventils hus är forsett med en operforerad botten och ãr vid byre anden fOrbunden med en skiya, som ligger ,ovanf Or filterkroppens ovre 5ndskiva o•eh ãr tall inspand mellan .ansiktsskyddet och filtret, nar filterbehall,aren är fastsatt pa .ansiktsskyddet. Inandningsluften, inkommer genom filterbehallarens perforerade sidovaggar och pas,serar vidare genom filterkroppen in i dermas inner-rum f Or att via inandningsventilen fortsatta in i ansiktsskyddets inandningsoppning. The device according to the invention is provided with the following salt: The filter body contains in its central inner space a cylindrical inhalation valve with valve openings on the mantle surface. This valve housing is provided with an unperforated bottom and is connected to the skin with a skiya, which is located above the filter body's upper 5nd plate and there is a pine clamp between the face shield and the filter, when the filter housing is attached to the face shield. The inhaled air, entering through the perforated side cradles and passages of the filter container, passes further through the filter body into their inner space and continues via the inhalation valve into the inhalation opening of the face shield.

Darvid ernas foljande fordelar. Luften suges mat mot behallarens ,axel, sá att hela liltreringseffekten hos fititerenheten utnytitjas. Stromningsmotstandei är litet trots komp,akt utforande. Filtret kan liitt uttagas ur filterbehallaren och ett nytt filter kan utan svarighet insattas. Data medf8r i sin tur den fordelen, .att man medelst utbytbara filter av olika slag kan Ora en och samma gasmask ,anvandbar for olika andamal, exempelvis for avskiljande .av damm och for borttagande .av giftiga gaser. Filtret med sin behallare, s,om är av ytterst kompakt konstruktio,n, verk,ar icke skrymmande och skymmer icke bararens synfalt, men trots detta har filtret mycket stor kapacitet. Thereby the following advantages. The air is sucked food against the container's shaft, so that the entire filtration effect of the fititer unit is utilized. Flow resistance is small despite comp, careful execution. The filter can be easily removed from the filter container and a new filter can be inserted without responsibility. Data, in turn, has the advantage that by means of replaceable filters of different kinds one can create one and the same gas mask, usable for different purposes, for example for separating dust and for removing toxic gases. The filter with its container, which is of extremely compact construction, is not bulky and does not obscure the visibility of the carrier, but despite this the filter has a very large capacity.

Ett ytterligare viktigt kannetecken pa uppfinningen är, att .ansiktsskyddet dtr filirsett med en munplatta med en darpa .anbragt tatningsyulst, som är anordnad att anligga mot ventilhusskivan, sa att luft icke kan passera mellan munplattan och ventilhusskivan. En tatningsring ãr anordnad mellan ventilhusskivan .och filterkroppens Ovre Eindskiva for att hindra ,ofiltrerad luft fran att inkomma mellanrummet mellan ventilhusskivan och ansiktsskyddets munplatta. Vidare kan munplattan vara perforerad med ett antal luftinstromningshal och vara forsedd med en mot densamma anliggande skiva, som är perforerad med, nyssnamnda hal motsvarande hal ,och är vridbar, sa att den kan installas med sina hal mitt for Mien i munplattan, flax gasmasken skall anvandas, resp. mellan Mien i munplattan, nar gasmaskens tathet skall provas. Harigenom blir .det m5jligt att prova tatheten .av gasmasken i lage pa ansiktet ,och sedan Ora gasmasken Mar for anvandning utan att dess lage pt .ansiktet behover andras. A further important feature of the invention is that the face shield is fitted with a mouth plate with a tapered sealing sleeve, which is arranged to abut against the valve housing disc, so that air cannot pass between the mouth plate and the valve housing disc. A sealing ring is arranged between the valve body plate and the upper body of the filter body to prevent unfiltered air from entering the space between the valve body plate and the faceplate mouth plate. Furthermore, the mouth plate may be perforated with a number of air inflow halls and be provided with a disc abutting against it, which is perforated with the hall just mentioned hall corresponding to the hall, and is rotatable, so that it can be installed with its halls in front of Mien in the mouth plate. used, resp. between the Mien in the mouth plate, when the tightness of the gas mask is to be tested. This makes it possible to test the tightness of the gas mask in the layer on the face, and then leave the gas mask Mar for use without its layer on the face needing others.

En utforingsform av en gasmask med anordningen enligt uppfinningen Or sasom exempel askadliggjord pa bifogade ritning. An embodiment of a gas mask with the device according to the invention Or, as an example, damaged in the accompanying drawing.

Fig. I visar en perspektivvy av gasmasken med dennas enskilda huvuddelar isarlagda. Fig. II visar ett tvarsnitt genom filterbehal- laren efter linjeni fig. I. Fig. 1 shows a perspective view of the gas mask with its individual main parts inserted. Fig. II shows a cross section through the filter container along the line in Fig. I.

Fig. III visar ett langdsnitt genom den hop- satta gasmasken efter linjeni fig. I. Fig. III shows a longitudinal section through the assembled gas mask along the line in Fig. I.

Fig. IV visar ett tvarsnitt genom inandningsventilen efter linjen IV—IV i fig. III. Fig. IV shows a cross-section through the inhalation valve along the line IV-IV in Fig. III.

Fig. V visar ell tvarsnitt genom en filterbehallare med en filterkropp av annat utforande. Fig. V shows a cross section through a filter container with a filter body of a different design.

Sjalva ansiktsskyddet 20 är foretradesvis gjutet eller pressat av gummi i en mot ansiktets konturer svarande form. ,Sasom framgar ,av fig. I, har ansiktsskyddet 20 en relativt trang nasdel 21, kinddelar 22 och en hakdel 23. Ndsdelen 21, som dr formad for att stracka sig Over ,anvandarens nasa, är fOrsedd med vulst 25. Denna, vulst Or utford i ett stycke med ansiktsskyddet och straeker sig app Over nasdelen for att fiirstarka denna. The face shield itself 20 is preferably molded or pressed of rubber in a shape corresponding to the contours of the face. As can be seen from Fig. 1, the face shield 20 has a relatively narrow nose portion 21, cheek portions 22 and a chin portion 23. The needle portion 21, which there is formed to extend over, the user's nose, is provided with bead 25. This bead Or challenge in one piece with the face shield and stretch the app Over the nasal part to strengthen it.

I kinddelarna 22 aro anordnade utandningsoppningar 26, i var och en av vilka ãr anbragt en utandningsventil 27 ,av flagon lamp-hg konstruktion. I den pa ritningarna visade utforingsformen har ventilhuset formen !av 2— — tvenne kupiga brickor, vilkass kanter mellan sig fastklamma kanterna .av Hien 26 i masken. Den lure skiyan eller brickan 28 är perforerad och utgar sate far en bojlig gummiskiva 29, som bildar ventilkroppen. Eftersom ventiIsatet är konkavt, Jigger ventilkroppen i viloldget stadigt an met sfitet. Den yttre briekan 30 är ocksa perforerad for att slfippsa ut den utandade luften .och den fasthalles pa den hire brickan av en skruv 31 eller nhgon liknande del, som fir forsedd med en mutter 32 for ,att fasthalla mitten av ventilkroppen 29 mot dess sate. In the cheek parts 22 there are arranged exhalation openings 26, in each of which an exhalation valve 27 is arranged, of flake lamp-like construction. In the embodiment shown in the drawings, the valve housing has the shape of two domed washers, the edges of which clamp the edges of the male 26 in the mask between them. The lure skiyan or washer 28 is perforated and provides a flexible rubber disc 29 which forms the valve body. Because the valve is concave, the valve body in the resting jig is firmly attached. The outer washer 30 is also perforated to release the exhaled air and is secured to the washer by a screw 31 or similar member provided with a nut 32 for holding the center of the valve body 29 against its seat.

Ansiktsskyddet 20 uppbar en behMlare 35 for filterkroppen eller filterenheten. For sdetta andamfil ãr :ansiktsskyddet forsett med en fldnsliknande munplatta 36, sorn är utford i ett stycke med ansiktsskyddet. Den speciell,a formen och .dimensionerna .av filterbehallaren 35 och vissa detaljer i dess kanstruktion bitcds ingen del av foreligg,ande uppfin.ning, men i samband med foreliggande uppfinning bora behallaren 35 och de i detsamma .anyand.a filterenheterna var.a sä standardiserade, aft gasmasken kan anpassas till flera olika anyandAingsomraden genom utbyte av en typ say filterenhet mot en annan typ .av filterenhet. The face shield 20 carried a container 35 for the filter body or filter unit. For this andamfil year: the face shield is provided with a flow-like mouth plate 36, sorn is challenged in one piece with the face shield. The special shape and dimensions of the filter container 35 and certain details in its construction are not part of the present invention, but in connection with the present invention the container 35 and the filter units thereof are the same. so standardized, aft gas mask can be adapted to several different anyandAings areas by exchanging one type say filter unit for another type .of filter unit.

Filterenheten sjaly skall .anbringas 1 behallaren 35. Derma behdllare inrymmer dven yentilhuset 38 for inandningsventilen, sh att ventilhuset kan anbringas i behallaren 35. Delta mesdfor Hera fordelar. For det forsta suges luften mat mot behdllarens axe', sh att hela filtreringseffekten hos filterenheten utnyttjas och ingen rak yfig bildas, genom vilken luften kan passera in i gasmaskens inre. For det andra tillater denna anordning say ventilhuset, ,att ventilen savskarmas frau sanvandarens fuktiga andedrdkt genom en perforerad mellanydgg eller skfirm 39, som i denna utfaringsform är utford i ett stycke med ansiktsskyldet 20. Denna mellan-vagg 39 HRH:ter obehindrad luftstrananing, men fungerar som en kondenseringsskarm, som minskar eller forhindrar spridande av fuktighet tillbaka till insandningsventilen yid den tidpnnkt, da anvandaren utandas forbi backventilen 29. The filter unit itself must be fitted to the container 35. These containers also accommodate the valve housing 38 for the inhalation valve, so that the valve housing can be fitted in the container 35. Delta mesdfor Hera benefits. First, the air is sucked food against the axis of the container, so that the whole filtration effect of the filter unit is utilized and no straight surface is formed, through which the air can pass into the interior of the gas mask. Secondly, this device allows the valve housing to be shielded from the sanitizer's moist breath by a perforated diaphragm or shield 39, which in this embodiment is challenged in one piece with the face shield 20. This diaphragm 39 HRHs unobstructed air circulation, but acts as a condensing screen, which reduces or prevents the spread of moisture back to the sanding valve at the time when the user exhales past the non-return valve 29.

Enligt uppfinningen anvdndes denna mellanvagg 39 tillsammans med en vridbar avstdogningsyentil 40 far provnin.g av andningsskyddets tdthet. Aystfingningsventilen 40 dr vridbart .anbragt ph ett centralt stift 41 och är forsedd med hal 42 (se fig. I), vilka ligga mittemsot halen 43 i mellanyfiggen 39 under normalt arbete .av andningsskyddet. En spak eller ett utsprang 14 ph den roterande avstangningsventilen 40 stracker sig ut at sidan, sa .att anyfindaren latt kan flytta Hien i den vridbara aystangningsventilen sh, satt de ligga antingen mitt for eller vid sidan av Mien 43. Dh hhlen i den vridb,ara aystangningsventilen ligga helt och hfillet vid sidan av Mien i mellanyaggen 39, kan ingen genomstromning av luft age. rum. Anvandaren kan da genom .att forsoka ,andsas in tuft avgara, om gasmasken p.assar tatt pO. an.siktet (samt em utandningsventilerna aro tab). Dfirefter kan man utan nhgon .annan findring an att vrida avstangningsventilen 40 till sadan.t ldge, att halen i densamma ligga mitt framfor halen 43, Aterstalla gasmasken till verksamt tillstand. According to the invention, this intermediate wall 39 is used together with a rotatable de-icing yen 40 to test the tightness of the respirator. The aisting valve 40 is rotatably mounted on a central pin 41 and is provided with a hole 42 (see Fig. 1), which lies in the middle of the tail 43 in the intermediate spike 39 during normal operation of the respirator. A lever or a projection 14 ph the rotary shut-off valve 40 extends to the side, so that the finder can easily move Hien in the rotatable shut-off valve sh, they sit either in front of or next to the Mien 43. Dh hhlen in the rotary, ara the shut-off valve lie completely and hfillet next to the Mien in the intermediate jaw 39, no flow of air age can. room. The user can then, by trying, breathe in the tuft avgara, if the gas mask p.assar taken pO. the face (as well as the exhalation valves aro tab). Then, without any other consideration, it is possible to turn the shut-off valve 40 to such an extent that the tail in it lies in the middle in front of the tail 43, to restore the gas mask to an operative state.

Anyandaren kan ph liknande satt aystinga utandningsventilerna f Or att Ora ett liknande prov. Far var .och en av dessa ventiler kan far .detta andamal anardnas en perforerad, vridbar aystangningsventil 44, som dr anbragt under skallen pa skruven 31 vid yttersidan av brickan 30. Mien i ayst5.ngningsventilen 44 bringas att ligga mitt for eller vid sidan av Mien i brickan 30 genom aft man vrider avstangningsventilen 44 med hjalp say dess utsprang 45. Anyandaren can ph similarly set aystinga exhalation valves f Or to Ora a similar sample. For each of these valves, a perforated, rotatable shut-off valve 44 may be provided, which is located below the skull of the screw 31 at the outside of the washer 30. The center of the shut-off valve 44 is caused to lie in front of or next to Mien in the washer 30 by turning the shut-off valve 44 by means of its projection 45.

Den i fig. loch II visade utfaringsformen av filterenheten fir ay enkel konstruktion. Ett psorost, sammanhfingande filtermaterial, exempelvis lilt, fir anordnat i veck 46 kring en central cylindrisk oppning eller halighet 47. Om filten eller generellt filtreringsmaterialet icke fir i form ay ett andlost hand, bora dess finder fastsdttas vid yarandra, sO. .att ingen fri oppning kvarlfimnas for luften. Man kan .anyan:da. en relatiyt tat filt, emedan den luftvolym, som per tidsenhet sstrommar genom en viss ytenhet, är helt liten. Dessutom ror sig luften i riktning mot filterenhetens axel, yarf or de msaterialpartiklar, som luften for med sig, traffa filtreringsmaterialet ungefar tangentiellt. Detta synes Oka filtreringseffekten. The embodiment of the filter unit shown in Fig. Loch II is of a simple construction. A psorost, cohesive filter material, for example lilt, is arranged in folds 46 around a central cylindrical opening or cavity 47. If the felt or generally the filtering material is not in the form of a breathable hand, its fins should be attached to each other, sO. .that no free opening is left for the air. Man kan .anyan: da. a relatively felt felt, because the volume of air that flows through a certain surface unit per unit of time is quite small. In addition, the air moves in the direction of the axis of the filter unit, yarf or the material particles which the air carries with it, hit the filtration material approximately tangentially. This seems to increase the filtration effect.

Andarna ay filterenheten kunna yore. tillslutna .av skivformiga filtstycken 50 och 51, men findtillslutningarna kunna ocksh besta av ogenomtrd.ngligt material, exempelvis aluminium eller ett gjut- seller pressbart material. For ytterligare forhfiltrande av filterenheten kunna vecken 46 omgivas av ett sammanhangande band 53 av porasare lilt. Den 1 filterenheten instrommande luften passerar Virg genom den psordsare filten 53, som filtrerar ut de starre p,artiklarna. Detta skyddar den naindre porosa filten 46 frail clessa starre partiklar, som ann.ars skulle kunna fylla sdess porer och Oka dess motstfind mot luftstromningen. I den centrala appningen är, som .ovan forklarats, ventilhuset 38 far inandningsventilen anbragt. The spirits ay the filter unit can yore. closed by disc-shaped felt pieces 50 and 51, but the fine closures can also consist of impermeable material, for example aluminum or a cast-cell compressible material. For further pre-filtering of the filter unit, the folds 46 can be surrounded by a continuous band 53 of porous lilac. The air flowing into the filter unit 1 passes Virg through the slower blanket 53, which filters out the stiffer articles. This protects the near porous blanket 46 frail clessa rigid particles, which otherwise could fill its pores and increase its resistance to airflow. In the central opening, as explained above, the valve housing 38 is fitted with the inhalation valve.

Denna ventil bar lampligen ett cylindriskt ventilhus. Sisom visas i fig. III och. IV, Or en bojlig gummiremsa 56 lagd i ring inuti yentilhsuset. Denna remsa ar .vid sett stfille mellan dess bade andar fastsatt ph ventilhuset genom fasthallningsorgan, sasom antydes vid 57. Da anyfindaren .andas in, inkommer den tuft, som p.asserat genom filterenheten, i ventilhuset genom appningarna 58 f orbi. ventilkroppen 56 och strammar sedan axiellt mot halen i mellanyfiggen 39. I stallet far remsan 56 kan man anyfinda en cylindrisk ventilkropp, .som genom organet 57 .ar fastsatt i — —3 ventilhuset. En dylik cylindrisk ventilkropp kan, om den är utford ay tunt, bajligt material, sham gummi, latt boj.a sig till och ur ingrepp med dess cylindriska ventilsate 38. This valve suitably carried a cylindrical valve housing. As shown in Fig. III and. IV, Or a flexible rubber strip 56 laid in a ring inside the yentilhsuset. This strip, when seen between the two ends, is fixed to the valve housing by retaining means, as indicated at 57. When the sensor is inhaled, the tuft which has passed through the filter unit enters the valve housing through the openings 58. the valve body 56 and then tightens axially against the tail in the intermediate nib 39. Instead of the strip 56, a cylindrical valve body can be found, which is fixed in the valve housing by the member 57. Such a cylindrical valve body can, if challenged by a thin, flexible material, sham rubber, be easily bent into and out of engagement with its cylindrical valve set 38.

For att enkel hopsattning av andningsskyddet skall astadkommas är ventilhuset eller ventilsatet 38 anbragt ph en del 60 av filterhuset, vilken del har formen av en skiva, som ligger mellan filterenheten :och flansen 36, da andningsskyddets ,olika ,delar aro, hopsatta. Vid en altern.ativ •anordning ar ventilhuset anbragt i filterenheten och uppbares .av filterenhetens andtillslutningar 50 och 51. En dylig anordning forenklar konstruktionen, eftersom skivan 60 kan bortfalla, men kraver, att varje filterenhet är forsedd med ett ventilhus. Mellan skivan 60 ,och filterenhetens andtillslutning 50 är inlagd en ringformig bricka eller packning 61, sh .att luften ej kan passera mat mellan delarna 50 och 60 utan inkornmer i ventilhuset 38 utan att passera igenom filterenheten. For undvikande av friktion mellan den vridbara avstangningsventilen ,och ski-van 60, är pa flansen 36 anordnad en sammanhangande, ringformig upphojning eller vulst 63, vilken upphajning eller vulst astadkommer lufttat anliggning mot skivan 60. In order to achieve easy assembly of the respirator, the valve housing or valve set 38 is arranged ph a part 60 of the filter housing, which part has the shape of a disc, which lies between the filter unit: and the flange 36, when the respirator, various parts aro, are assembled. In an alternative device, the valve housing is located in the filter unit and is supported by the filter fittings 50 and 51. A suitable device simplifies the construction, since the disc 60 can be omitted, but requires that each filter unit be provided with a valve housing. Between the disc 60, and the duct closure 50 of the filter unit, an annular washer or gasket 61 is inserted, so that the air cannot pass food between the parts 50 and 60 without entering the valve housing 38 without passing through the filter unit. To avoid friction between the rotatable shut-off valve and the disc 60, a continuous, annular elevation or bead 63 is arranged on the flange 36, which suspension or bead provides an air-bearing abutment against the disc 60.

Behallarens 35 huvuddel eller stomme 6utgores av en cylindrisk skal, vars kant 66 är gangad pa insidan for anslutning till en med ytterganga forsedd klamring 67. Klamringen 67 pressas in over flansen 36 och samverkar med den gangade kanten 66 for att fasthalla filterenheten i huset 35 och hailer de olika delarna tillsammans i lufttatt ingrepp med varandra. Pa klamringen 67 aro anordnade krokar 69 for fastsattning av ett elastiskt band 70, vilket stacker sig runt anyandarens huvud f Or att hâlla gasmasken pa sin plats. The main part or body 6 of the container 35 is formed by a cylindrical shell, the edge 66 of which is threaded on the inside for connection to an outer clamping ring 67. The clamping ring 67 is pressed over the flange 36 and cooperates with the threaded edge 66 to hold the filter unit in the housing 35 and hailer the different parts together in aerated engagement with each other. On the clamping ring 67, hooks 69 are provided for attaching an elastic band 70, which extends around the wearer's head to hold the gas mask in place.

Den mitt emot mellanvaggen 39 liggande anden av behallaren 35 kan vara delvis oppen for att utsatta andtillslutningen 51 for instrommande luft, sarskilt om namnda ändtill- sluicing är av filt. Ytan av andtillslutningen 51 fir sa liten i jamforelse med ytan av filtrets veckade del, att endast en liten del ay den luft, som strommar till ventilhuset 38, passerar genom denna andtillslutning 51. Denna ande av huset kan darfor endast vara perf orerad eller kan till och med vara helt ,och hallet sluten. The spirit of the container 35 opposite the diaphragm 39 may be partially open to expose the duct closure 51 to inflowing air, especially if said end closure is made of felt. The surface of the duct closure 51 is so small in comparison with the surface of the pleated part of the filter that only a small part of the air flowing to the valve housing 38 passes through this duct closure 51. This spirit of the housing can therefore only be perforated or can be and with be completely, and the hall closed.

Filterenheten kan vara utformad ph .olika salt. I stallet for den i fig. II visade anordningen med tall liggande veck, kan man anbringa yecken glesare, sasom visas i fig. V. Vid denna anordning kan man lampligen late vartannat veck 72 gra langre in mot filterenhetens .axel an de mellanliggande vecken 73. The filter unit can be designed for different salts. In the place of the device with pine folds shown in Fig. II, the yoke can be arranged more sparingly, as shown in Fig. V. In this device it is possible to place every other fold 72 degrees further towards the axis of the filter unit than the intermediate folds 73 .

Claims

Patent claim:

Device with gas masks, having a resilient: abutment facing the face. Set: face shield (20): and having a filter container (35) connected thereto, containing a cylindrical filter body (46), characterized in that the filter body (46) ) in its central cylindrical inner space (47) contains a cylindrical inhalation valve (38, 56) with the inlet openings of the valve on the circumferential surface of the cylinder, which valve housing (38) is provided with an unperforated bottom: and at the oure linden Sr f Connected with a disc (60 ), which is located above the upper body plate (50) of the filter body and is clamped between the face shield and the filter when the filter container (65) is attached to the face shield.

Device according to claim 1, characterized in that the face shield is provided with a mouth plate (36, 39) with a sealing bead (63) arranged thereon, which is arranged to: abut against the valve housing plate (60), so that air cannot pass between the mouth plate (36) and the valve body plate (60). .

Device according to claim 1 or 2, characterized in that the mouth plate (36, 39) is perforated with an autal air inflow hall (43) and provided with a disc (40) abutting against it: which is perforated with the hall just mentioned. corresponding hatred (42) and Sr vridhar, sO. that it can be installed with its hal in the middle of Hien in the mouth plate, when the gas mask should, anyandas, resp. between the Mien in the mouth plate, when the density of the gas mask is to be tested.

4. A device according to any one of claims 1-3, characterized in that: a sealing ring (61) is arranged between the valve housing disc (60) and the Sure duct plate (50) of the filter body for: preventing unfiltered air from entering the space between the valve body plate and the face shield. mouth plate. Stockholm 1949. Rune. Boktr. P. A. liorstedt & Miler 490039 SN3SVIS1VM3N3