GB2415634A - Breathing mask with hood and valve - Google Patents
Breathing mask with hood and valve Download PDFInfo
- Publication number
- GB2415634A GB2415634A GB0414563A GB0414563A GB2415634A GB 2415634 A GB2415634 A GB 2415634A GB 0414563 A GB0414563 A GB 0414563A GB 0414563 A GB0414563 A GB 0414563A GB 2415634 A GB2415634 A GB 2415634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hood
- cover
- breathing mask
- mask
- wearer
- 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
- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 24
- 230000000717 retained effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000000994 depressogenic effect Effects 0.000 claims description 4
- 239000012858 resilient material Substances 0.000 claims 1
- 210000000613 ear canal Anatomy 0.000 abstract description 3
- 210000003811 finger Anatomy 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 210000003454 tympanic membrane Anatomy 0.000 description 2
- 208000003643 Callosities Diseases 0.000 description 1
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/084—Means for fastening gas-masks to heads or helmets
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
- A62B18/10—Valves
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
A breathing mask has a face piece to be worn within a hood 3 and a cover 2 to be worn outside the hood, and a stud 1 for attaching the face piece to the hood 3. The stud 1 is pressed into but not through the material of the hood 3, and both are retained in a clip formed in the cover 2 externally of the hood. According to a second aspect, a breathing mask has an outlet port (10, Fig 3) with a valve which opens on exhalation, but can be closed by the wearer in order to allow the wearer to equalise pressure in the ear canals.
Description
BREATHING EQUIPMENT
The present invention relates to breathing equipment and in particular to breathing masks, such as those worn by the pilots of military aircraft.
The pilot of a military aircraft typically wears a breathing mask which is attached by straps for, example, to a helmet. In order to provide environmental protection, it may be necessary to provide the pilot with a hood worn either under or over the helmet.
The mask has to be located within the hood so that a problem arises when connecting the mask to the helmet, in the event that the hood is worn under the helmet. If openings are provided in the hood to receive straps connecting the mask to the helmet, the openings will need to be sealed to ensure the integrity of the hood. If the seals become damaged or distorted in use, the health of the pilot may be placed at risk. Similar problems may arise in the case of breathing masks provided for use of those working in toxic atmospheres.
According to one aspect of the present invention the breathing mask has a component for location within the hood and a component for location externally of the hood, one of the components being provided or associated with a projection capable of being pressed into the material of the hood, and the other component having an opening for receiving and retaining the projection and the portion of the hood to which it is applied.
Preferably the projection has an enlarged head which, together with the portion of the hood, is retained in the opening ea. as a snap-fit. The projection may he of mushroomlike form and be provided on a face piece of the mask for reception, together with the portion of hood covering it, in an opening n1 a cover locate:! on the outside of the hood. The cover is provided with fitmellts for attachment of straps securing the cover to the helmet. Although the opening in which the projection IS received may pass entirely through the cover, it will be appreciated that the openmg may be in the corns of a depression in the cover, the depression hOVlilg, I COllstrlCted nill to grip th(' prOJeCtlOII. - 2
A problem experienced by the wearers of breathing masks is that changes of external air pressure lead to an imbalance in air pressure across the ear drum, and to discomfort for the wearer. Some way of equalising the air pressure is therefore needed and typically this is achieved by pinching the nose, clenching the lips and exerting pressure as by exhaling, a technique known as valsalva. In the case of a pilot or worker who is required to wear goggles, pinching the nose may not be practicable. The ability to pinch the nose effectively may also be restricted if thick gloves are being worn. A conventional breathing mask includes an outlet port provided with an expiratory valve which opens as the wearer exhales and through which the exhalate is vented. According to a second aspect of the invention, the port may be provided with a part which may be depressed by finger or thumb pressure to close the port.
The cover may be so shaped by, for example, being dished, so as to allow the wearer to locate it with ease, even when wearing thick gloves. With the port closed, the wearer may exhale vigorously, and it is found that the effect of this is to equalise the pressure in the ear canals.
The first and second aspects of the invention need not be employed together, but either may be employed in a breathing mask without the other.
Embodiments of the above-mentioned aspects of the invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1 diagrammatically shows a mask embodying the first aspect of the invention, Figure 2 is an axial section through the fixing arrangement for the mask, and Figure 3 diagrammatically shows a mask embodying the second aspect.
Referring to FIgurci 1, a pilot Is provided with an environmental protection hood 3 worn under a helmet 4. A hrcatllng mask incorporates a face piece which is worn under the hood (anL1 not vsllc In Figure 1) and a cover 2 which is worn externally of the hood and is CC)ntleCtek] to t6C healer hat strapping 5 and a bayonet fitting 5a which is retained in a - 3 receiver 5b attached to the helmet 4, as for example in GB 2313399. A hose 6 supplies air to the face piece of the mask.
The face piece is secured to the cover by an arrangement incorporating a stud 1 provided on the face piece and capable of inter-fitting with an opening 7 in the cover. The stud is of mushroom-like shape and has an enlarged head as shown in Figure 2 so as to be a snap fit in the opening, with the material of the hood trapped between the stud and the cover. The stud may be readily snapped into the opening and released from it, but reliably secures the two parts of the mask when interlocked with it.
Referring now to Figure 3, a breathing mask is provided with an expiratory valve having an outlet port 10 covered by a finger piece 9. The construction of the valve may be as described in UK Patent Application No. 0311338.8, but may alternatively be of any suitable known type. It is arranged to close as the wearer inhales, and to open as the wearer breathes out.
When in its normal position the cover 9 does not interfere with this manner of operation but may be depressed to close the port 10 when it would normally be open.
In order to ease discomfort in the ears, the wearer of the mask may use the finger piece 9 to close the port and at the same time endeavour to exhale strongly. Exhalation is prevented due to the port 10 being closed, resulting in elevated pressure in the wearer's respiratory system, thereby equalising or at least reducing the pressure difference across this ear drums.
The wearer then releases the finger piece.
The finger piece may take the form of a cover for the outlet port retained by a central spigot 11 and arranged to close the port when depressed. Alternatively the finger piece may be coupled to the valve and serve to override and close it when it would normally be open. The finger piece may be so shaped as to be easily identifiable by touch, as by being dished.
Each feature disclosed in this specification (which term includes the claims) and/or shown in the drawings may be incorporated in the invention independently of other disclosed and/or illustrated features. - 4
The text of the abstract filed herewith is repeated here as part of the specification.
A breathing mask has a face piece to be worn within a hood 3 and a cover 2 to be worn outside the hood, and a stud 1 for attaching the face piece to the hood. The stud is pressed into but not through the material of the hood, and both are retained in a clip formed in the cover 2 externally of the hood. According to a second aspect, a breathing mask has an outlet port capable of being closed by the wearer in order to allow him to equalise pressure in the ear canals. - 5
Claims (9)
1. A breathing mask for use with a helmet and a hood worn within the helmet, the mask including a component for location within the hood and a component for location externally or the hood, one of the components being provided or associated with a projection capable of being pressed into the material of the hood, and the other component having an opening for receiving and retaining the projection and the portion of the hood to which it is applied.
2. A breathing mask as claimed in Claim 1, wherein the projection has an enlarged head which is shaped to be retained in the opening.
3 A breathing mask as claimed in Claim 2, wherein the opening is defined by resilient material so that the projection is a snap-fit therein.
4 A breathing mask comprising a face piece to be worn within a hood and a cover to be worn externally of the hood and attachable to the helmet, the face piece being provided or associated with a stud with an enlarged head, the stud being retainable within an opening in the cover with a portion of the hood trapped between the stud and the cover.
5. A breathing mask having an outlet port, a valve associated with the outlet port, the valve opening when a wearer of the mask exhales, and means operable by the wearer for closing the port when the wearer exhales.
6. A breathing mask as claimed in Claim 5, wherein said means comprises a cover for the port, the cover being capable of being depressed or otherwise moved manually to close the port.
7. A breathing mask;. as clamcd in Clam 6, whereon the cover is so shaped as to be - 6 readily identifiable by touch.
8. A breathing mask having an outlet port capable of being closed by the wearer at will.
9. Breathing apparatus substantially as hereinbefore described with reference to and as illustrated in Figures I and 2 or Figure 3 of the drawings.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0414563A GB2415634B (en) | 2004-06-29 | 2004-06-29 | Breathing equipment |
GB0901104A GB2453885B (en) | 2004-06-29 | 2004-06-29 | Breathing equipment |
US10/597,138 US20080276933A1 (en) | 2004-01-12 | 2005-01-12 | Headgear |
PCT/GB2005/000065 WO2005068021A2 (en) | 2004-01-12 | 2005-01-12 | Headgear |
EP05701835A EP1703949A2 (en) | 2004-01-12 | 2005-01-12 | Headgear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0414563A GB2415634B (en) | 2004-06-29 | 2004-06-29 | Breathing equipment |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0414563D0 GB0414563D0 (en) | 2004-08-04 |
GB2415634A true GB2415634A (en) | 2006-01-04 |
GB2415634B GB2415634B (en) | 2009-03-18 |
Family
ID=32843247
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0901104A Expired - Lifetime GB2453885B (en) | 2004-06-29 | 2004-06-29 | Breathing equipment |
GB0414563A Expired - Lifetime GB2415634B (en) | 2004-01-12 | 2004-06-29 | Breathing equipment |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0901104A Expired - Lifetime GB2453885B (en) | 2004-06-29 | 2004-06-29 | Breathing equipment |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB2453885B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2805749A1 (en) * | 2013-05-22 | 2014-11-26 | Moldex-Metric AG & Co. KG | Breathing mask |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU452345A1 (en) * | 1973-04-17 | 1974-12-05 | Всесоюзный научно-исследовательский институт горноспасательного дела | Antidust respirator |
JPS56166859A (en) * | 1980-05-26 | 1981-12-22 | Tateyoshi Sueshige | Dustproof mask |
GB2247396A (en) * | 1990-08-10 | 1992-03-04 | Sabre Safety Ltd | Emergency escape breathing apparatus |
JP2002012611A (en) * | 2000-06-30 | 2002-01-15 | Japan Polychem Corp | CATALYST FOR POLYMERIZING alpha-OLEFIN AND METHOD FOR POLYMERIZING alpha-OLEFIN |
GB2367755A (en) * | 2000-08-01 | 2002-04-17 | Joseph Anthony Griffiths | Emergency escape hood |
US20030136411A1 (en) * | 2001-07-03 | 2003-07-24 | Ming-Mei Hsieh | Portable life mask |
GB2401668A (en) * | 2003-05-16 | 2004-11-17 | Helmet Integrated Syst Ltd | Expiratory valve unit |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3785430B2 (en) * | 2000-10-20 | 2006-06-14 | 興研株式会社 | Filter unit opening and closing device |
-
2004
- 2004-06-29 GB GB0901104A patent/GB2453885B/en not_active Expired - Lifetime
- 2004-06-29 GB GB0414563A patent/GB2415634B/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU452345A1 (en) * | 1973-04-17 | 1974-12-05 | Всесоюзный научно-исследовательский институт горноспасательного дела | Antidust respirator |
JPS56166859A (en) * | 1980-05-26 | 1981-12-22 | Tateyoshi Sueshige | Dustproof mask |
GB2247396A (en) * | 1990-08-10 | 1992-03-04 | Sabre Safety Ltd | Emergency escape breathing apparatus |
JP2002012611A (en) * | 2000-06-30 | 2002-01-15 | Japan Polychem Corp | CATALYST FOR POLYMERIZING alpha-OLEFIN AND METHOD FOR POLYMERIZING alpha-OLEFIN |
GB2367755A (en) * | 2000-08-01 | 2002-04-17 | Joseph Anthony Griffiths | Emergency escape hood |
US20030136411A1 (en) * | 2001-07-03 | 2003-07-24 | Ming-Mei Hsieh | Portable life mask |
GB2401668A (en) * | 2003-05-16 | 2004-11-17 | Helmet Integrated Syst Ltd | Expiratory valve unit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2805749A1 (en) * | 2013-05-22 | 2014-11-26 | Moldex-Metric AG & Co. KG | Breathing mask |
Also Published As
Publication number | Publication date |
---|---|
GB0414563D0 (en) | 2004-08-04 |
GB2453885B (en) | 2009-10-07 |
GB2415634B (en) | 2009-03-18 |
GB0901104D0 (en) | 2009-03-11 |
GB2453885A (en) | 2009-04-22 |
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