GB2236681A - Respiratory protection device - Google Patents
Respiratory protection device Download PDFInfo
- Publication number
- GB2236681A GB2236681A GB8922951A GB8922951A GB2236681A GB 2236681 A GB2236681 A GB 2236681A GB 8922951 A GB8922951 A GB 8922951A GB 8922951 A GB8922951 A GB 8922951A GB 2236681 A GB2236681 A GB 2236681A
- Authority
- GB
- United Kingdom
- Prior art keywords
- face mask
- filter
- face
- cloth
- valve
- 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.)
- Granted
Links
- 230000000241 respiratory effect Effects 0.000 title claims description 10
- 239000004744 fabric Substances 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000012286 potassium permanganate Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 description 6
- 101100269850 Caenorhabditis elegans mask-1 gene Proteins 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 235000010269 sulphur dioxide Nutrition 0.000 description 2
- 239000004291 sulphur dioxide Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000544 Gore-Tex Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Exposure Control For Cameras (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
- Studio Devices (AREA)
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
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 face mask 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. means for attaching the face mask to the head, 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, and means for temporarily connecting the filter to the face mask.
The face mask preferably includes at least one non-return exhalation valve in register with a corresponding aperture in the filter. The temporary connecting means preferably connect the valve to the aperture. In particular the aperture may contain an annular member fixed to the filter and releasably engaged with the valve.
The face mask is preferably porous and preferably has a porous fabric (e.g. cotton) lining, so as not to interfere too greatly with perspiration. The face mask may, in particular, comprise spongey material. It 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 for 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 preferably resiliently stretchable, which facilitates a good fit.
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), tssProcom X5S770" (Trade Mark of ICI plc for a 5% elastomer modified polypropylene), "Gortex" (Trade Mark of W.L. Gore & Associates (U.K.) Ltd. for a porous hydrophobic membrane material made from PTFE), 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 fabric lining, for the sake of comfort, enhanced strength, and improved handling.
Activated charcoal cloth is woven from charcoal yarn and is non-toxic. It has the ability to physical and chemical trap odours, vapours, bacteria, viruses, and dust of a size greater than 0.5 Bm. With respect to vehicle exhaust pollutants, it exhibits excellent adsorption of aromatic hydrocarbons and particulate matter, good adsorption of carbon monoxide, moderate adsorption of sulphur dioxide, and poor adsorption of nitrogen dioxide. Impregnation of the cloth with copper markedly improves adsorption of nitrogen dioxide. The fabric lining may be impregnated with potassium permanganate to enhance sulphur dioxide adsorption and also to indicate when the filter is due for replacement, owing to a colour change from brown-black to yellow.
The filter preferably incorporates a nose clip 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, with reference to the accompanying drawings, in which:
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.
The filter 2 has a shape corresponding to that of the face-covering portion 3 of the mask. It comprises an outer layer of activated charcoal cloth 19 and a non-woven or particulate air-permeable lining (not shown). The filter 2 is made in two parts stitched together along a seam 21. A nose clip 22 comprises two parallel lengths of wire embedded in a plastics strip sewn to the filter 2 along a seam 23.
The filter 2 has two apertures corresponding to the mask apertures 11 and each containing an annular connection member 24 having a flange 25 on the side of the filter adjacent the face, a peripheral groove 27 in which the filter is fixed, 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 (15)
1. A respiratory protection device comprising a face mask for covering at least the nose and mouth, the face mask having anair-permeable region for extending over at least the nasal and oral orifices, means for attaching the face mask to the head, 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, and means for temporarily connecting the filter to the face mask.
2. A device as claimed in claim 1, in which the face mask includes at least one non-return exhalation valve in register with a corresponding aperture in the filter.
3. A device as claimed in claim 2, in which the temporary connecting means connect the valve to the aperture.
4. A device as claimed in claim 3, in which the aperture contains an annular member fixed to the filter and releasably engaged with the valve.
5. A device as claimed in any preceding claim, in which the face mask is porous.
6. A device as claimed in any preceding claims, in which the face mask is of spongey material.
7. A device as claimed in any preceding claim, in which the face mask has a porous fabric lining.
8. A device as claimed in any preceding claims, in which the face mask has side pieces which carry the attaching means and can be connected together at the back of the head.
9. A device as claimed in claim 8, in which the rear ends of the side pieces are enlarged and carry respective loops and hooks for connection together.
10. A device as claimed in any preceding claim, in which the face mask is resiliently stretchable.
11. A device as claimed in any preceding claim, in which the filter comprises active carbon.
12. A device is claimed in claim 11, in which the filter comprises activated charcoal cloth.
13. A device as claimed in claim 12, in which the surface of the cloth which is to contact the face has a fabric lining.
14. A device as claimed in claims 12 or 13, in which the cloth is impregnated with copper and/or with potassium permanganate.
15. A respiratory protection device substantially as described with reference to, and as shown in, the accompanying drawings.
15. A device as claimed in any preceding claim, in which the filter incorporates a plastically deformable nose clip.
16. A respiratory protection device substantially as described with reference to, and as shown in, the accompanying drawings.
Amendments to the claims have been filed as follows 1. 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 a 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 for attaching the face mask to the head so that the filter is sandwiched between the face mask and the face.
2. A device as claimed in claim 1, in which the exhalation valve is adjacent one end of the mouth when the device is worn.
3. A device as claimed in claim 2, in which there are two said exhalation valves adjacent respective ends of the mouth.
4. A device as claimed in any preceding claim, in which the temporary connecting means comprises an annular member which extends through the aperture and is releasably engaged with the valve.
5. A device as claimed in claim 4, in which the annular member has a flange on the side of the filter adjacent the face.
6. A device as claimed in any preceding claim, in which the air permeable region of the face mask has a plurality of through-holes.
7. A device as claimed in any preceding claim, in which the face mask has a porous fabric lining.
8. A device as claimed in any preceding claim, in which the face mask has side pieces which carry the attaching means and can be connected together at the back of the head.
9. A device as claimed in claim 8, in which the rear ends of the side pieces are enlarged and carry respective loops and hooks for connection together.
10. A device as claimed in any preceding claim, in which the filter comprises active carbon.
11. A device is claimed in claim 10, in which the filter comprises activated charcoal cloth.
12. A device as claimed in claim 11, in which the surface of the cloth which is to contact the face has a fabric lining.
13. A device as claimed in claim 11 or 12, in which the cloth is impregnated with copper and/or with potassium permanganate.
14. A device as claimed in any preceding claim, including a plastically deformable nose clip.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8922951A GB2236681B (en) | 1989-10-12 | 1989-10-12 | Respiratory protection device |
| CA002067195A CA2067195C (en) | 1989-10-12 | 1990-10-12 | Respiratory protection device |
| JP2514453A JP2928381B2 (en) | 1989-10-12 | 1990-10-12 | Respiratory protection device |
| AU66025/90A AU6602590A (en) | 1989-10-12 | 1990-10-12 | Respiratory protection device |
| EP19900915501 EP0495864A1 (en) | 1989-10-12 | 1990-10-12 | Respiratory protection device |
| PCT/GB1990/001581 WO1991005584A1 (en) | 1989-10-12 | 1990-10-12 | Respiratory protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8922951A GB2236681B (en) | 1989-10-12 | 1989-10-12 | Respiratory protection device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8922951D0 GB8922951D0 (en) | 1989-11-29 |
| GB2236681A true GB2236681A (en) | 1991-04-17 |
| GB2236681B GB2236681B (en) | 1992-04-22 |
Family
ID=10664432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8922951A Expired - Lifetime GB2236681B (en) | 1989-10-12 | 1989-10-12 | 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 (9)
| 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 |
| GB2299762A (en) * | 1995-04-13 | 1996-10-16 | Chelsea Systems Ltd | Respiratory mask |
| US6561191B1 (en) * | 1997-02-10 | 2003-05-13 | Resmed Limited | Mask and a vent assembly therefor |
| US7207335B2 (en) | 1997-02-10 | 2007-04-24 | Resmed Limited | Mask and vent assembly therefor |
| US7926487B2 (en) | 2000-05-15 | 2011-04-19 | Resmed Limited | Respiratory mask having gas washout vent and gas washout vent assembly for a respiratory mask |
| US7942150B2 (en) | 2004-04-09 | 2011-05-17 | Resmed Limited | Nasal assembly |
| 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 |
| DE102018125228A1 (en) * | 2018-10-11 | 2020-04-16 | Pr-Technik Gmbh | Modular respirator |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9203299D0 (en) * | 1992-02-17 | 1992-04-01 | Indena Spa | Cosmetic and/or pharmaceutical compositions and methods for their use |
| AR027527A1 (en) | 2000-02-17 | 2003-04-02 | Ecosmart Technologies Inc | PESTICIDE COMPOSITIONS CONTAINING ESSENTIAL VEGETABLE OILS AGAINST THE HUMAN BODY LICE |
| EP1966229B1 (en) * | 2005-09-12 | 2015-10-21 | Abela Pharmaceuticals, Inc. | Systems for removing dimethyl sulfoxide (dmso) or related compounds, or odors associated with same |
| US9642403B2 (en) | 2007-08-16 | 2017-05-09 | Kimberly-Clark Worldwide, Inc. | Strap fastening system for a disposable respirator providing improved donning |
| JP2012511987A (en) * | 2008-12-17 | 2012-05-31 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Respiratory interface device with filtration media |
| 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 |
| JP2021169666A (en) * | 2020-04-14 | 2021-10-28 | 有限会社トラッド | Air sterilizer by ultraviolet irradiation and masks and full face masks using it |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1075346A (en) * | 1964-06-23 | 1967-07-12 | Martindale Electric Company Lt | Improvements in and relating to sanitary masks |
| GB1092378A (en) * | 1963-09-27 | 1967-11-22 | Chapman & Smith Ltd | Device for filtering air |
| GB1182838A (en) * | 1966-06-29 | 1970-03-04 | Giffard L | Face-Mask or Respirator. |
| GB1515096A (en) * | 1976-02-05 | 1978-06-21 | Segersten G | Face mask with exchangeable filter |
| GB2072516A (en) * | 1980-03-31 | 1981-10-07 | Siebe Gorman & Co Ltd | Improvements in and relating to respiratory face masks |
| GB2176404A (en) * | 1985-06-13 | 1986-12-31 | Od G Univ Im I I Mechnikova | Respirator |
Family Cites Families (4)
| 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 | |
| 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 WO PCT/GB1990/001581 patent/WO1991005584A1/en not_active Ceased
- 1990-10-12 JP JP2514453A patent/JP2928381B2/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
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| GB1182838A (en) * | 1966-06-29 | 1970-03-04 | Giffard L | Face-Mask or Respirator. |
| GB1515096A (en) * | 1976-02-05 | 1978-06-21 | Segersten G | Face mask with exchangeable filter |
| GB2072516A (en) * | 1980-03-31 | 1981-10-07 | Siebe Gorman & Co Ltd | Improvements in and relating to respiratory face masks |
| GB2176404A (en) * | 1985-06-13 | 1986-12-31 | Od G Univ Im I I Mechnikova | Respirator |
Cited By (18)
| 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 |
| GB2299762A (en) * | 1995-04-13 | 1996-10-16 | Chelsea Systems Ltd | Respiratory mask |
| US8826910B2 (en) | 1997-02-10 | 2014-09-09 | Resmed Limited | Mask and vent assembly therefor |
| US8122886B2 (en) | 1997-02-10 | 2012-02-28 | Resmed Limited | Respiratory mask assembly with vent |
| US7845354B2 (en) | 1997-02-10 | 2010-12-07 | Resmed Limited | Mask and vent assembly therefor |
| US8833371B2 (en) | 1997-02-10 | 2014-09-16 | Resmed Limited | Mask and vent assembly therefor |
| US6561191B1 (en) * | 1997-02-10 | 2003-05-13 | Resmed Limited | Mask and a vent assembly therefor |
| US7207335B2 (en) | 1997-02-10 | 2007-04-24 | Resmed Limited | Mask and vent assembly therefor |
| US8528558B2 (en) | 2000-05-15 | 2013-09-10 | Resmed Limited | Respiratory mask having washout vent and gas washout vent assembly for a respiratory mask |
| US7926487B2 (en) | 2000-05-15 | 2011-04-19 | Resmed Limited | Respiratory mask having gas washout vent and gas washout vent assembly for a 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 |
| US8757162B2 (en) | 2004-04-09 | 2014-06-24 | Resmed Limited | Nasal assembly |
| US7942150B2 (en) | 2004-04-09 | 2011-05-17 | Resmed Limited | Nasal assembly |
| US9895505B2 (en) | 2004-04-09 | 2018-02-20 | Resmed Limited | Nasal assembly |
| US10842957B2 (en) | 2004-04-09 | 2020-11-24 | ResMed Pty Ltd | Nasal assembly |
| DE102018125228A1 (en) * | 2018-10-11 | 2020-04-16 | Pr-Technik Gmbh | Modular respirator |
| DE102018125228B4 (en) * | 2018-10-11 | 2021-06-24 | Pr-Technik Gmbh | Modular respiratory protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6602590A (en) | 1991-05-16 |
| WO1991005584A1 (en) | 1991-05-02 |
| JP2928381B2 (en) | 1999-08-03 |
| CA2067195A1 (en) | 1991-04-13 |
| GB8922951D0 (en) | 1989-11-29 |
| GB2236681B (en) | 1992-04-22 |
| CA2067195C (en) | 2003-06-10 |
| JPH05500915A (en) | 1993-02-25 |
| EP0495864A1 (en) | 1992-07-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20091011 |