CA1180629A - Respirator hood - Google Patents

Respirator hood

Info

Publication number
CA1180629A
CA1180629A CA000389883A CA389883A CA1180629A CA 1180629 A CA1180629 A CA 1180629A CA 000389883 A CA000389883 A CA 000389883A CA 389883 A CA389883 A CA 389883A CA 1180629 A CA1180629 A CA 1180629A
Authority
CA
Canada
Prior art keywords
hood
respirator
wearer
mask
means
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
Application number
CA000389883A
Other languages
French (fr)
Inventor
Bernd Grosenick
Gunter Von Kopp
Gerhard Putsch
Stefan Zloczysti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AUTERGESELLSCHAFT GmbH
Original Assignee
AUTERGESELLSCHAFT GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DEP3048276.9 priority Critical
Priority to DE19803048276 priority patent/DE3048276C2/de
Application filed by AUTERGESELLSCHAFT GmbH filed Critical AUTERGESELLSCHAFT GmbH
Application granted granted Critical
Publication of CA1180629A publication Critical patent/CA1180629A/en
Application status is Expired legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62BDEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B17/00Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
    • A62B17/04Hoods

Abstract

ABSTRACT OF THE DISCLOSURE

This invention relates to a respirator hood for use as a fire escape device or the like which comprises an outer hood adapted to fit about the head of a wearer and having a wide neck opening through which the head of a wearer may be inserted with ease, an inner mask mounted within said hood and adapted to encircle the mouth and nose of the wearer in use, seal means disposed between the hood and inner mask and arranged to isolate an eye surrounding area of the hood from the neck opening, strapping means for securing the hood to the head of the wearer, retaining flap means projecting rearwardly from said inner mask on opposite sides thereof and being adapted to be secured to said strapping means whereby the strapping means may serve to secure the inner mask to the face of the wearer, and a viewing window in the outer hood.

Description

This invention relates to respirator hoods. In particular, this invention relates to a respirator hood to be worn by persons escaping from fire and smoke.
PRIOR ~RT
~t is well known that many deaths occur in fires in high-rise building and the li]ce as a result of poisoning from combustion gases and smoke. Smoke poisoning and poor visibility caused by thick, arrid smoke which is produced in many fires can cause more difficulty than the combustion flames. Previous attempts have been made to provide an escape-hood filter unit for use by persons Eleeing a fire. In these known units, the air inhaled is filtered in order to eliminate toxic combustion gases and other units provide protection for the eyes and head of the wearer.
In one known respirator hood which is used for fire escape purposes, the hood has a knitted collar adapted to fit the neck of the wearer. The collar is made of a resilient textile material and must be expanded in order to pull it over the head of the wearer. This makes the hood difficult to fit in the event of panic and also gives the wearer a constricted feeling since, - when the hood is fitted, the collar performs the function of a seal around the neck. According to this known design, the hood strapping which engages externally with the filter, presses the inner mask against the wearer's face. As a result of this structure, the seating of the inner mask on the face of the wearer is not positive and the mask may, therefore, be displaced while it is being worn. Furthermore, the sight-window in the hood is almost flat and this restricts the field of vision.

- 2 -The respirator hood which will be described hereinafter is constructed so as to be simple and easily fitted while providing a complete se~l for widely different shapes of head and face. The field of vision is also quite e~tensive as compared to known ~ designs of hoods.
According to one aspect of the present invention, a respirator hood comprlses a hood having a sight-window and adjust-able strapping and an external respirator filter. The hood has a wide neck opening designed to accommodate heads of different sizes.
When the neck opening is in the open configuration, it extends outwardly beyond the respirator filter. A seal is provided on each side of the hood between an inner mask and the inside of the hood for the purposes of sealing off the eye area from the neck opening.
The neck opening is open at its lower end and is in communication with ambient air~ Straps are provided which pass around the back of the head and are cor.nected to the hood for the purposes of securing the hood to the head of the wearer. Retaining flaps are formed in each side of the inner mask and merging from the body of the mask towards the temples. The flaps constitute points of application, recessed in relation to the varying surfaces, in the form of a bead, on the inner mask, for the strapping running around the outside of the hood. The sea~ is disposed below the strapping to serve as a seal line for the eye area.
The invention will be more clearly understood after reference to the following detailed specification read in conjunction with the drawings wherein:
Figure 1 is a side view of a respiratox hood;
Figure 2 is a front view of the respirator hood;

Figure 3 is a front view of the head of a person wearing a modified mask wi-thout the hood.
Figure 4 is a sectional view taken along the line A-B
of Figure l;
Figure 5 :is a section along t:he line ~-B o ri~ul-e 1 t~ithou-t the strapping; alld Figure 6 is a plan vie~ O r a bl~ suiLablc ior ~.se in forming the respirltor hood oE F:iclure 1.
The respirator hoocl illustrated in ~`i(,~lres 1 and 2 of the drawings consists of a flame-proof ancl heat-resistallt hood 1 ~ithin ~hich a viet~ing windot~ 2 is formed so as to be loc?ted in the field of vision of the t~earer. The vie~ing ~indow 2 is formed from a transparent foil material or ple~iglas, an inner mask in the form of a half-mas}; 3 is also provided. A breathing filter 4 is secured to the inner mask 3 and the hood 1 by means of a clamp 5, an exhaling valve 10 and strapping 6. The strappin~
6 consists of a tension-strap 6a and an endless strip 6b ~hicll passes around the back of the hood. The endless strip is secured to the hood at the point ~ (Figure 1) and is guided througil a loo~
Y. This arrangement has -the advalltage of s?reading the strapping and compensating for length for vrevelltillg the hood from slipping on the ~earer's head.
Arranged laterally upon t}le inller mas~ 3, appro~imately on a level ~ith the nostrils of a ~iearer, is a retainin~ flap 3~
(Figures ~l and 5) ~hich emerges from tnQ inller mask 3 and supports a buckle 7 located on the outside of the hood for receiving the stra?ping 6a. The strapping 6a is secured to the hood by ~uc~les 7 ~Jhich 2re fastened through the material of the hood 1 and -- 'I --the retaining flap 3a by means of screws or rivets 8.
The fact that the location at which the strapping 6a is secured to the hood is set back from the front of the hood, by reason of the position of the retaining flaps 3a of the inner mask, the hood can be correctly and stabley positioned on the user's face withou~ any slippage. Moreover, as a result of the special arrangement of ~he strapping and, in particular, the configuration of the blank used for the hood, the viewing window 2 which is sewn into the hood ac~uires a curved shaped when the hood is being worn. This eliminates the need for the usual curved frame to provide this curvature.
The inner mask 3 is formed with a bearing surface 3b in the form of a bead which presses against the face of the wearer when it is being used to act as a seal extending about the breathing area. This feature is illustrated in Figure 5 of the drawings.
Located on each side of the hood, between the inner mask 3 and the inside of the hood is a seal 9 which seals off the eye area from the neck opening in the hood which is open at its lower end and is in communication with the ambient air.
The seal 9 may either be in the form of lip integral with the body of the inner mask 3 or it may be provided in the form of a part made-of rubber, foam material or an elastomer which is ~lued, snap-fastened into or buttoned to the body of the mask in any suit-able manner. The seal thus provided may be secured to the inner mask and the-inside of the hood on one or both sides thereof.
As shown in Figures 4 and 5, the seal 9 is secured to the inner mask 3 on one side of the vicinity of the retaining ~f~

~la? 3a and is in tI1C -O~ o a ~a(~ 3~ oamcd ~aJ;erial ar.d is shaped in such ~ar!lcl: .c to ~pl~ sealillg pressure to the inside OL tI1e }100d.
The seal 9a ~a~ also be in a -orm in wllich it projects beyond tlle body o- t]le l1aSI~ ovcr ta cheeks of the ~earer to e.~tend to the tcmples a silo:ll in l`i(3ure 3 of the clrawings. The desicJn of this s.al i sucll t:h;lt oll side is ~ a~)ted to t'e sba?
of the cheek ~hile tile O~hC?l:` ~id~e ~o;lEo~llls t-o .Illd iil.ls Up all~' cavities or depressiolls bet~eell t}l~ bod~v o tile ini~er masl~ and the inside of the hoocl . The 5~;!;I1 j IIg aCtiOl1 may be i;nproved by locating a seal, at least in ~art under the strappincJ 6a so that pre~ssure is applied thereto whell the strappillg is tightelled.
According to a further aLternative construction the seal 9 ~La~ pass over the cheeks toward the wearer s eyes such that it runs around the inner edge o~ the window of the hood.
In this construction the design of the seal itself is such that when the hood is fitted and the strapping is tightened the seal is pressed to the wearer s face thus sealing off the eye area.
Figure 6 illustrates a blallk suitable for use in the forming of a hood in accordance witll an embodilllellt of the present invention. The blank is formed with an aperture 12 for receiving the viewing window 2 and a further aperture 1l for receiving the fil-ter 4. A U-shaped notch 11 is formed at the front of the hood with the side edges and inner ecqe oi tlc notcil conver inCJ at 2~ points ~ hen the blank is SeWn togetiler this produces a T-shaped seam at the front and top of the hood ~hich provides that the fron-tal area is arched as sho~ll in Figure 1. In this marner tne sewn-in ~:indo~ is clrawn to the required curved con-iguration to afforc~ a panoramic line of vision to the wearer.

From the foregoing, it will be apparent that the respirator of the present invention provides the advantages of a wide neck-opening to allow it ~o be fitted quickly and easily over the head of the wearer without imposing a restriction on the wearer. In addition, the eye area of the wearer is completely sealed by means of a sealing pad so that the hood is comfortable to wear. Furthermore, exhaled air passes downwardly through an exhaling valve out of the open lower end o the hood thereby providing the re~uired flushing of exhaled air from the hood.
Furthermore, by reason of the fact that the internal mask is secured to its mounting straps rearwardly from its point of contact with the face of the wearer, the inner mask is securely seated on the wearer's face. In addition, the structure of the hood provides that the viewing window which is formed therein will extend in an arcuate curve to provide a panoramic line of vision. These and other advantages of the present invention will be apparent to those skilled in the art.

Claims (14)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A respiratory hood for use as a fire escape device or the like comprising:
(a) an outer hood adapted to fit about the head of a wearer and having a wide neck opening through which the head of a wearer may be inserted with ease and a viewing window mounted on a window aperture;
(b) an inner mask mounted within said hood and adapted to encircle the mouth and nose of the wearer in use;
(c) seal means disposed between the hood and inner mask and extending about the perimeter of the window aperture to isolate an eye surrounding area of the hood from the neck opening;
(d) strapping means for securing the hood to the head of the wearer;
(e) retaining flap means projecting rearwardly and out-wardly from said inner mask on opposite sides thereof to provide securement points spaced outwardly from said seal means which are adapted to be secured to said strapping means whereby the strapping means may serve to seal the seal means to the face of the wearer to isolate the eye surrounding area in use; and (f) a viewing window in the outer hood.
2. A respirator hood according to Claim 1 wherein the seal means is in the form of a lip formed on the inner mask.
3. A respirator hood according to Claim 1 wherein the seal means is in the form of a resilient member which is secured to the inner mask.
4. A respirator hood according to Clam 1 wherein one side of the seal means is secured to the body of the inner mask in the vicinity of the retaining flap.
5. A respirator hood according to Claim 1, 2 or 3 wherein the seal means is in the form of a pad of foamed material shaped in such a manner as to apply a sealing pressure to the inside of the outer hood.
6. A respirator hood according to Claim 1 wherein the seal means projects beyond the body of the inner mask and extends across the cheeks of the wearer to the temples of the wearer.
7. A respirator hood according to Claim 1 wherein the seal means extends around an inner edge of the viewing window.
8. A respirator hood according to Claim 1 wherein the endless strip of the strapping is secured at the rear of the hood and passes through a loop mounted on the hood at another location.
9. A respirator hood according to Claim 1 wherein the strapping is secured to the hood by means of buckles which are fastened through the outer hood and the retaining flap of the inner mask to the outside of the outer hood by mounting means.
10. A respirator hood according to Claim 1 wherein the viewing window is sewn into the outer hood and is curved as a result of the manner in which the strapping is secured to the hood and the configuration of the blank from which the outer hood is made.
11. A respirator hood according to Claim 1 wherein the inner mask further comprises an exhaling valve through which exhaled air may be carried downwardly and outwardly through the neck opening.
12. A flat blank for the respirator hood, more particularly according to Claim 1, having cut-outs for the window and the exhaling valve, characterized in that a U-shaped incision is provided to form the front part of the hood and in that the horizontal and vertical cuts of this incision curve towards each other and intersect at points the ends of the horizontal cut being drawn down towards the said window.
13. A flat blank according to Claim 1 characterized in that the seams of the incision form a T-shaped pattern at the front and top parts of the hood.
14. A hood-type respirator, especially for fire escape purposes, consisting, in particular, of a hood fitted with viewing window and adjustable straps, as well as with an inside mask arranged inside the hood as a half mask and with a respirator filter located outside the hood, characterized by the provision of:
a) a hood with a neck opening made to pass over different head sizes, such that, when in the spread-out state, the neck opening extends beyond the respirator filter, b) seals located inside the hood between the inside mask and the hood's interior surface and sealing of the viewing window region of the hood from the hood's lower neck-opening which is open and in communication with the surrounding atmosphere, c) drawstraps which, together with an endless strap 6b that passes around the rear-head side of the hood, constitute a strap system, d) retaining tongues attached to the sides of the inside mask and extending out from the body of the mask in the direction of the temples, the tongues providing places of attachment for the drawstraps outside of the hood and which are set back with respect to the inside mask's bearing surface.
CA000389883A 1980-12-16 1981-11-12 Respirator hood Expired CA1180629A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEP3048276.9 1980-12-16
DE19803048276 DE3048276C2 (en) 1980-12-16 1980-12-16

Publications (1)

Publication Number Publication Date
CA1180629A true CA1180629A (en) 1985-01-08

Family

ID=6119811

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000389883A Expired CA1180629A (en) 1980-12-16 1981-11-12 Respirator hood

Country Status (5)

Country Link
EP (1) EP0054154B1 (en)
JP (1) JPS6058877B2 (en)
CA (1) CA1180629A (en)
DE (1) DE3048276C2 (en)
NO (1) NO151879C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7210477B2 (en) 2002-05-29 2007-05-01 Brookdale International Systems, Inc. Respirator hood assembly
US20140238392A1 (en) * 2013-02-28 2014-08-28 Milspray Llc Escape hood

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US4573217A (en) * 1984-07-30 1986-03-04 Reed Clifford C Protective hood for firefighters
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AU2004234183B2 (en) 2003-05-02 2011-01-20 Resmed Limited A mask system
CN101683546A (en) 2004-04-09 2010-03-31 雷斯梅德有限公司 Nasal assembly
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US8397728B2 (en) 2005-10-14 2013-03-19 Resmed Limited Cushion to frame assembly mechanism
NZ612787A (en) 2005-10-25 2015-01-30 Resmed Ltd Interchangeable mask assembly
US8517023B2 (en) 2007-01-30 2013-08-27 Resmed Limited Mask system with interchangeable headgear connectors
EP2708258B1 (en) 2008-03-04 2016-06-22 ResMed Ltd. Mask system
CN104307119B (en) * 2014-11-14 2017-02-22 山西新华化工有限责任公司 Lighting element with fire escape breathing hood
CN106723465A (en) * 2017-04-06 2017-05-31 郑卓慧 Heavy air pollution protective clothing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7210477B2 (en) 2002-05-29 2007-05-01 Brookdale International Systems, Inc. Respirator hood assembly
US20140238392A1 (en) * 2013-02-28 2014-08-28 Milspray Llc Escape hood

Also Published As

Publication number Publication date
CA1180629A1 (en)
EP0054154B1 (en) 1984-12-12
NO814044L (en) 1982-06-17
DE3048276C2 (en) 1988-06-16
DE3048276A1 (en) 1982-07-01
EP0054154A1 (en) 1982-06-23
JPS6058877B2 (en) 1985-12-21
NO151879C (en) 1985-06-26
JPS57156775A (en) 1982-09-28
NO151879B (en) 1985-03-18

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