CA2067195C - Respiratory protection device - Google Patents
Respiratory protection device Download PDFInfo
- Publication number
- CA2067195C CA2067195C CA002067195A CA2067195A CA2067195C CA 2067195 C CA2067195 C CA 2067195C CA 002067195 A CA002067195 A CA 002067195A CA 2067195 A CA2067195 A CA 2067195A CA 2067195 C CA2067195 C CA 2067195C
- Authority
- CA
- Canada
- Prior art keywords
- filter
- face mask
- face
- mask
- air
- 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.)
- Expired - Lifetime
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
- A62B23/02—Filters for breathing-protection purposes for respirators
- A62B23/025—Filters for breathing-protection purposes for respirators the filter having substantially the shape of a mask
Abstract
A face mask (1), covering at least the nose and mouth, has an air-permeable region (holes 9) for extending over the nasal and oral orifices and has means (7, 8) for attaching the mask to the head. A disposable flexible air-permeable filter (2) extends over the nasal and oral orifices, in contact with the face, and is temporarily connected to the face mask (1) by non-return exhalation valves (12).
Description
~o~~r~~~
WO 91/05584 fZ:T/~B90/01581 Respiratory Protection Device This invention relates to a respiratory protection device comprising a face mask with a filter. The device is intended particularly, but not solely, for the use of cyclists in built-up areas and on roads with high traffic density.
The invention provides a respiratory protection device comprising a resiliently stretchable face mask of spongy material for covering at least the nose and mouth, the face mask having an air-permeable region for extending over at least the nasal and oral orifices, the face mask including at least one non-return exhalation valve, a disposable flexible air-permeable filter for extending over at least the nasal and oral orifices, the filter being in direct contact with the face when the device is worn, temporary connecting means connecting the exhalation valve to a corresponding aperture in the filter, and means far attaching the face mask to the head so that the filter is sandwiched between the face mask and the face.
The face mask preferably has a porous fabric (e. g.
cotton) lining, so as not to interfere too greatly with perspiration. The face mask conveniently has side pieces which carry the attaching means and which can be connected together at the back of the head. Preferably the rear ends of the side pieces carry respective loops and hooks fox connection together; the rear ends are preferably enlarged so that the rear ends can be overlapped to different degrees to accommodate different head sizes. The face mask is resiliently stretchable, which facilitates a good fit.
WO 91/05584 PCf/G~90/015~1 The face mask may be made, for example, from "Plastazote" or "Evazote" (Trade Marks of BXL Plastics Ltd. for closed-cell cross-linked polyethylene and co-polymer foams) or expanded neoprene.
The filter preferably comprises active carbon, preferably in the form of activated charcoal cloth. The surface of the cloth which is to contact the face preferably has a lining, such as a particulate lining for the sake of comfort, enhanced strength, improved handling, and increased ability to trap air-borne particulate matter.
Activated charcoal cloth is woven from charcoal yarn and is non-toxic. It has the ability to physically and chemically trap odours, vapours, bacteria, viruses, acid gases, and dust of a size greater than 0. 5 ~Cm. With respect to vehicle exhaust pollutants, it exhibits excellent adsorption of aromatic hydrocarbons and particulate matter, poor adsorption of carbon monoxide, moderate adsorption of sulphur dioxide, and poor adsorption of nitrogen dioxide.
Impregnation of the filter with platinum may increase its ability to adsorb carbon monoxide.
Impregnation of the filter with copper gives it excellent ability to chemisorb nitrogen dioxide and sulphur dioxide. A non-woven fabric lining may be impregnated with potassium permanganate to enhance chemisorbtion of acid gases and also to offer an indication, by way of a colour change, when the filter is due for replacement.
The face mask preferably incorporates one or more nose clips which can be plastically deformed to fit the bridge of the nose in order to minimize leakage round the edge of the filter.
The invention will be described further, by way of example,~wit.h reference to the accompanying drawings, in whi ch:
WHO 9i/0558d ~ ~ ~ ~ ~ ~ ~ Pt.T1G~90/01581 Figure 1 is an exploded perspective view of a respiratory protection device;
Figure 2 is a side view of. an exhalation valve;
Figure 3 is an axial section through the valve, ' taken on line B-B in Figure 2;
Figure 4 is a section taken on line C-C in Figure 2;
and Figure 5 is an axial section through an annular connection member.
The respiratory protection device illustrated comprises a face mask 1 and a filter 2 which fits in the face mask and is in direct contact with the face when the device is worn.
The face mask 1 is of expanded neoprene sandwiched between knitted fabric coverings. It has a face-covering portion 3, which is to extend vertically from the top of the nose to the chin and horizontally from cheek to cheek, and integral side pieces 4 whose rear ends 6 are enlarged and bear respectively "Velcro"
(Registered Trade Mark) hook material 7 and loop material 8. The mask has through-holes 9 defining an air-permeable region corresponding to the region of the nasal and oral orifices.
Near each end of the mouth the mask has an aperture 11 in which a non-return exhalation valve 12 is fixed.
The valve has a cover 13 with peripheral openings 14, a freely-movable valve disc 16, an annular valve seat 17 which projects into the mask through the aperture 11, and an annular retaining member 18 which clamps the periphery of the aperture 11 to the valve seat 17 and cover 13.
A plastically deformable nose clip 20 comprising a pressing made from annealed aluminium is incorporated in the face mask 1 in the region of the bridge of the nose.
WO 91/05584 fZ:T/~B90/01581 Respiratory Protection Device This invention relates to a respiratory protection device comprising a face mask with a filter. The device is intended particularly, but not solely, for the use of cyclists in built-up areas and on roads with high traffic density.
The invention provides a respiratory protection device comprising a resiliently stretchable face mask of spongy material for covering at least the nose and mouth, the face mask having an air-permeable region for extending over at least the nasal and oral orifices, the face mask including at least one non-return exhalation valve, a disposable flexible air-permeable filter for extending over at least the nasal and oral orifices, the filter being in direct contact with the face when the device is worn, temporary connecting means connecting the exhalation valve to a corresponding aperture in the filter, and means far attaching the face mask to the head so that the filter is sandwiched between the face mask and the face.
The face mask preferably has a porous fabric (e. g.
cotton) lining, so as not to interfere too greatly with perspiration. The face mask conveniently has side pieces which carry the attaching means and which can be connected together at the back of the head. Preferably the rear ends of the side pieces carry respective loops and hooks fox connection together; the rear ends are preferably enlarged so that the rear ends can be overlapped to different degrees to accommodate different head sizes. The face mask is resiliently stretchable, which facilitates a good fit.
WO 91/05584 PCf/G~90/015~1 The face mask may be made, for example, from "Plastazote" or "Evazote" (Trade Marks of BXL Plastics Ltd. for closed-cell cross-linked polyethylene and co-polymer foams) or expanded neoprene.
The filter preferably comprises active carbon, preferably in the form of activated charcoal cloth. The surface of the cloth which is to contact the face preferably has a lining, such as a particulate lining for the sake of comfort, enhanced strength, improved handling, and increased ability to trap air-borne particulate matter.
Activated charcoal cloth is woven from charcoal yarn and is non-toxic. It has the ability to physically and chemically trap odours, vapours, bacteria, viruses, acid gases, and dust of a size greater than 0. 5 ~Cm. With respect to vehicle exhaust pollutants, it exhibits excellent adsorption of aromatic hydrocarbons and particulate matter, poor adsorption of carbon monoxide, moderate adsorption of sulphur dioxide, and poor adsorption of nitrogen dioxide.
Impregnation of the filter with platinum may increase its ability to adsorb carbon monoxide.
Impregnation of the filter with copper gives it excellent ability to chemisorb nitrogen dioxide and sulphur dioxide. A non-woven fabric lining may be impregnated with potassium permanganate to enhance chemisorbtion of acid gases and also to offer an indication, by way of a colour change, when the filter is due for replacement.
The face mask preferably incorporates one or more nose clips which can be plastically deformed to fit the bridge of the nose in order to minimize leakage round the edge of the filter.
The invention will be described further, by way of example,~wit.h reference to the accompanying drawings, in whi ch:
WHO 9i/0558d ~ ~ ~ ~ ~ ~ ~ Pt.T1G~90/01581 Figure 1 is an exploded perspective view of a respiratory protection device;
Figure 2 is a side view of. an exhalation valve;
Figure 3 is an axial section through the valve, ' taken on line B-B in Figure 2;
Figure 4 is a section taken on line C-C in Figure 2;
and Figure 5 is an axial section through an annular connection member.
The respiratory protection device illustrated comprises a face mask 1 and a filter 2 which fits in the face mask and is in direct contact with the face when the device is worn.
The face mask 1 is of expanded neoprene sandwiched between knitted fabric coverings. It has a face-covering portion 3, which is to extend vertically from the top of the nose to the chin and horizontally from cheek to cheek, and integral side pieces 4 whose rear ends 6 are enlarged and bear respectively "Velcro"
(Registered Trade Mark) hook material 7 and loop material 8. The mask has through-holes 9 defining an air-permeable region corresponding to the region of the nasal and oral orifices.
Near each end of the mouth the mask has an aperture 11 in which a non-return exhalation valve 12 is fixed.
The valve has a cover 13 with peripheral openings 14, a freely-movable valve disc 16, an annular valve seat 17 which projects into the mask through the aperture 11, and an annular retaining member 18 which clamps the periphery of the aperture 11 to the valve seat 17 and cover 13.
A plastically deformable nose clip 20 comprising a pressing made from annealed aluminium is incorporated in the face mask 1 in the region of the bridge of the nose.
4 ~ ~ ~'~ ~ ~ ~ Pf:T/G1390/01581 The filter 2 has a shape corresponding to that of the face-covering portion 3 of the mask. Tt comprises an outer layer of particulate non-woven material, a middle layer of activated charcoal cloth, and an inner layer or lining of particulate non-woven material. The filter 2 is made in two parts stitched together along a seam 21.
The filter 2 has two apertv.res corresponding to the mask apertures 11 and each containing an annular connection member 24 having a flange 26 on the side of the filter adjacent the face, and a tube 28 which projects out through the filter. The tube 28 is an interference fit in the bore of the retaining member 18 of the corresponding exhalation valve 12.
Thus, owing to the separable interconnection of the face mask 1 and the filter 2 by the interengagement of the connection members 24 and the valves 12 and owing to the sandwiching of the filter 2 between the mask 1 and the wearer's face, the filter 2 is located in a stable and most effective position and yet is easily removable for replacement.
The filter 2 has two apertv.res corresponding to the mask apertures 11 and each containing an annular connection member 24 having a flange 26 on the side of the filter adjacent the face, and a tube 28 which projects out through the filter. The tube 28 is an interference fit in the bore of the retaining member 18 of the corresponding exhalation valve 12.
Thus, owing to the separable interconnection of the face mask 1 and the filter 2 by the interengagement of the connection members 24 and the valves 12 and owing to the sandwiching of the filter 2 between the mask 1 and the wearer's face, the filter 2 is located in a stable and most effective position and yet is easily removable for replacement.
Claims (4)
1. A respiratory protection device comprising:
a face mask (1) for covering at least the nose and mouth, the face mask (1) having an air-permeable region for extending over at least the nasal and oral orifices;
and a flexible air-permeable filter (2) for extending over at least the nasal and oral orifices;
wherein the filter (2) is disposable, temporary connecting means (24) releasably connecting the filter (2) to the face mask (1), the filter (2) being sandwiched between the face mask (1) and the face and in direct contact with the face when the device is worn; and wherein the face mask (1) is made of flexible and resiliently stretchable spongy material and includes integral side pieces (4) which form a continuation of the material of the face mask and whose rear ends (6) have means (8, 9) for connecting them together at the back of the head in order to attach the face mask (1) to the head so that it fits the face closely so as to provide effective sealing around the air-permeable region.
a face mask (1) for covering at least the nose and mouth, the face mask (1) having an air-permeable region for extending over at least the nasal and oral orifices;
and a flexible air-permeable filter (2) for extending over at least the nasal and oral orifices;
wherein the filter (2) is disposable, temporary connecting means (24) releasably connecting the filter (2) to the face mask (1), the filter (2) being sandwiched between the face mask (1) and the face and in direct contact with the face when the device is worn; and wherein the face mask (1) is made of flexible and resiliently stretchable spongy material and includes integral side pieces (4) which form a continuation of the material of the face mask and whose rear ends (6) have means (8, 9) for connecting them together at the back of the head in order to attach the face mask (1) to the head so that it fits the face closely so as to provide effective sealing around the air-permeable region.
2. A device as claimed in claim 1, including at least one non-return exhalation valve (12) mounted on the face mask (1) and communicating with an aperture in the filter (2), wherein the temporary connecting means comprises an annular member (24) which has a flange (26) on the side of the filter (2) adjacent the face and which extends through the aperture in the filter (2) and is releasably engaged with the valve (12).
3. A device as claimed in claim 2, wherein the valve (12) is adjacent one end of the mouth when the device is worn.
4. A device as claimed ire claim 1, wherein the face mask (1) is provided with a plastically deformable nose clip (20).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8922951.2 | 1989-10-12 | ||
| GB8922951A GB2236681B (en) | 1989-10-12 | 1989-10-12 | Respiratory protection device |
| PCT/GB1990/001581 WO1991005584A1 (en) | 1989-10-12 | 1990-10-12 | Respiratory protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2067195A1 CA2067195A1 (en) | 1991-04-13 |
| CA2067195C true CA2067195C (en) | 2003-06-10 |
Family
ID=10664432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002067195A Expired - Lifetime CA2067195C (en) | 1989-10-12 | 1990-10-12 | Respiratory protection device |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0495864A1 (en) |
| JP (1) | JP2928381B2 (en) |
| AU (1) | AU6602590A (en) |
| CA (1) | CA2067195C (en) |
| GB (1) | GB2236681B (en) |
| WO (1) | WO1991005584A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9642403B2 (en) | 2007-08-16 | 2017-05-09 | Kimberly-Clark Worldwide, Inc. | Strap fastening system for a disposable respirator providing improved donning |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2262891A (en) * | 1991-12-05 | 1993-07-07 | Genevieve * Marsh Teresa | All in one face mask |
| GB2264060A (en) * | 1992-02-12 | 1993-08-18 | Kuo Huei Liang | Mask with means for passing out the expiration of air |
| GB9203299D0 (en) * | 1992-02-17 | 1992-04-01 | Indena Spa | Cosmetic and/or pharmaceutical compositions and methods for their use |
| GB9507718D0 (en) * | 1995-04-13 | 1995-05-31 | Chelsea Systems Ltd | Mask |
| AUPO504597A0 (en) | 1997-02-10 | 1997-03-06 | Resmed Limited | A mask and a vent assembly therefor |
| US6561191B1 (en) * | 1997-02-10 | 2003-05-13 | Resmed Limited | Mask and a vent assembly therefor |
| EP1408762A2 (en) | 2000-02-17 | 2004-04-21 | Ecosmart Technologies, Inc. | Plant essential oils containing pediculicidal compositions |
| US6581594B1 (en) | 2000-05-15 | 2003-06-24 | Resmed Limited | Respiratory mask having gas washout vent and gas washout vent for respiratory mask |
| AU2007202555B2 (en) * | 2001-12-04 | 2011-09-08 | ResMed Pty Ltd | Respiratory Mask Having Gas Washout Vent and Gas Washout Vent Assembly for a Respiratory Mask |
| JP4975611B2 (en) | 2004-04-09 | 2012-07-11 | レスメド・リミテッド | Nasal assembly |
| JP5399072B2 (en) * | 2005-09-12 | 2014-01-29 | アベラ ファーマスーティカルズ インコーポレイテッド | System for removing dimethyl sulfoxide (DMSO) or related compounds or odors associated therewith |
| WO2010070495A1 (en) * | 2008-12-17 | 2010-06-24 | Koninklijke Philips Electronics, N.V. | Respiratory interface device with filtration medium |
| US8617295B2 (en) * | 2009-09-30 | 2013-12-31 | 3M Innovative Properties Company | Active-particulate air filter having monolith primary filter and polishing filter |
| USD746439S1 (en) | 2013-12-30 | 2015-12-29 | Kimberly-Clark Worldwide, Inc. | Combination valve and buckle set for disposable respirators |
| US10434341B1 (en) | 2015-06-05 | 2019-10-08 | Steve Gordon Torbenson | Mask apparatuses and approach |
| CN105795554B (en) | 2015-12-07 | 2018-07-27 | 小米科技有限责任公司 | Mask |
| KR101964732B1 (en) * | 2017-12-05 | 2019-04-02 | 한은빈 | dust mask |
| DE102018125228B4 (en) * | 2018-10-11 | 2021-06-24 | Pr-Technik Gmbh | Modular respiratory protection device |
| JP2021169666A (en) * | 2020-04-14 | 2021-10-28 | 有限会社トラッド | Air sterilizer by ultraviolet irradiation, and mask and full face mask using the same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR374693A (en) * | 1907-01-09 | 1907-06-20 | Arthur Touchard | Mouth cover for motorists |
| FR870560A (en) * | 1941-03-05 | 1942-03-16 | Use and method of making filter paper washable as an air and gas filter, and manufacture of filter paper respiratory masks | |
| GB1092378A (en) * | 1963-09-27 | 1967-11-22 | Chapman & Smith Ltd | Device for filtering air |
| GB1075346A (en) * | 1964-06-23 | 1967-07-12 | Martindale Electric Company Lt | Improvements in and relating to sanitary masks |
| FR1503573A (en) * | 1966-06-29 | 1967-12-01 | Shell respirator | |
| SE7601232L (en) * | 1976-02-05 | 1977-08-06 | Reboprodukter Goran Segersten | FACE MASK WITH REPLACABLE FILTER |
| GB2072516A (en) * | 1980-03-31 | 1981-10-07 | Siebe Gorman & Co Ltd | Improvements in and relating to respiratory face masks |
| GB2176404B (en) * | 1985-06-13 | 1988-07-27 | Od G Univ Im I I Mechnikova | Respirator |
| US4856508A (en) * | 1987-04-13 | 1989-08-15 | New England Thermoplastics, Inc. | Face mask |
| DE3719420A1 (en) * | 1987-06-11 | 1988-12-29 | Sandler Helmut Helsa Werke | RESPIRATORY MASK |
-
1989
- 1989-10-12 GB GB8922951A patent/GB2236681B/en not_active Expired - Lifetime
-
1990
- 1990-10-12 CA CA002067195A patent/CA2067195C/en not_active Expired - Lifetime
- 1990-10-12 EP EP19900915501 patent/EP0495864A1/en not_active Withdrawn
- 1990-10-12 AU AU66025/90A patent/AU6602590A/en not_active Abandoned
- 1990-10-12 WO PCT/GB1990/001581 patent/WO1991005584A1/en not_active Application Discontinuation
- 1990-10-12 JP JP2514453A patent/JP2928381B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9642403B2 (en) | 2007-08-16 | 2017-05-09 | Kimberly-Clark Worldwide, Inc. | Strap fastening system for a disposable respirator providing improved donning |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2928381B2 (en) | 1999-08-03 |
| AU6602590A (en) | 1991-05-16 |
| EP0495864A1 (en) | 1992-07-29 |
| WO1991005584A1 (en) | 1991-05-02 |
| GB2236681B (en) | 1992-04-22 |
| JPH05500915A (en) | 1993-02-25 |
| GB8922951D0 (en) | 1989-11-29 |
| CA2067195A1 (en) | 1991-04-13 |
| GB2236681A (en) | 1991-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |