CA1048203A - Protection-hood or helmet-mask for use in environments dangerous to work - Google Patents
Protection-hood or helmet-mask for use in environments dangerous to workInfo
- Publication number
- CA1048203A CA1048203A CA76252458A CA252458A CA1048203A CA 1048203 A CA1048203 A CA 1048203A CA 76252458 A CA76252458 A CA 76252458A CA 252458 A CA252458 A CA 252458A CA 1048203 A CA1048203 A CA 1048203A
- Authority
- CA
- Canada
- Prior art keywords
- hood
- helmet
- air
- walls
- wall
- 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
Links
Abstract
Abstract of the Disclosure A protection-hood or helmet-mask having double walls of transparent plastic material, which covers the whole head and by aid of an elastic collar is sealed to the wearer's neck.
The space between the walls is divided by a partition wall into two identical halves to which hoses for supply and abduction of air are connected at the lower back of the hood.
The air is led to the wearer through an opening in the inner wall at the wearer's mouth and nose. The air can be passed through the hood by overpressure or underpressure arrangements.
An air filter is arranged upstream of the air inlet of the hood.
The space between the walls is divided by a partition wall into two identical halves to which hoses for supply and abduction of air are connected at the lower back of the hood.
The air is led to the wearer through an opening in the inner wall at the wearer's mouth and nose. The air can be passed through the hood by overpressure or underpressure arrangements.
An air filter is arranged upstream of the air inlet of the hood.
Description
1~482~3 The invention concerns a protection-hood to be used in environments in which it is dangerous to work, including a hood-shaped construction which covers the whole head, and by the aid of an elastic collar stays close to the user's neck, as well as arrangemen-ts for supply and abduction of air through hoses which are connected to the hood. The hood for use especially in places where there might be gases, dust etc., but it may also be used as a protection hood when diving.
In places of w~rk where there are dust ox dangerous gases, there are used dust-masks or gas-masks, and these are usually itted with ventilators for breathing in and out whlch give a considerable resistance against the air-flow. These masks will, therefore, feel warm and clammy in use, since the resistance makes it difficult to breathe, and wet used air remains within the mask. It is thereore, difficult to get the worke~s to use such masks.
There are protection-hoods of a relatively elastic material, where through hoses or other similar arrangemants is supplied air with a certain over-pressure, and this air to-gether with respirated air leaks out through ventilators, ilters ~
or other places where air may escape around the neck of the user. :
French patent No. 1,599,791). `~
If enough air is forced lnto these hoods to ensure `
that respirated air and evaporated perspiration with certainty are abducted~ this will lead to a cold draught against the fa¢e.of the user.
The ai~ of the invention is to pro~ide a new and betterprotection-hood o the a~ove mentioned type, in which the mention-ed disadvantaqes are a~oided.
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The present invention is broadly defined as a helmet adapted completely to surround the head of the user and having means to seal the helme-t to the user's body, -the h~lmet being of double-walled construction comprising a pair of spaced inner and outer walls of stiff material, the inner wall having an opening in front and at least the outer wall being transparent at least where it overlies the opening, partition means ex-tending between the inner and outer walls from the top of the opening of the inner wall rearwardly and downwardly to the bot~om of the rear of the helmet, means to supply air to the space between the walls on one side of the partition means, and means to remove air from the space between the walls on the other side of the partition means whereby air passes from the supply means between the walls past the opening and again between the walls of the removing means.
The advantages of this protec-tion-hood are that it enables one to lead relatively large quantities of air through the hood without imposing dangerous draughts on the wearer, at the same time as clean breathing air with a high amount of oxygen is maintained within the mask without impair-ing vision with condensed breathing vapour.
Since the protection-hood is made of a stiff, clear ~; material, and since the collar is made in an elastic material,~
a good view from the mask i9 achieved. The double wa].ls will help to xeduce the noise from the outside sources, of ten found in working places with dust or dangerous gases, as for example in mines, workshops and chemical industries.
The invention will be further described by the follow-ing with reference to the drawlngs, and other characteristics of the invention will also be seen from this description.
~ .
In places of w~rk where there are dust ox dangerous gases, there are used dust-masks or gas-masks, and these are usually itted with ventilators for breathing in and out whlch give a considerable resistance against the air-flow. These masks will, therefore, feel warm and clammy in use, since the resistance makes it difficult to breathe, and wet used air remains within the mask. It is thereore, difficult to get the worke~s to use such masks.
There are protection-hoods of a relatively elastic material, where through hoses or other similar arrangemants is supplied air with a certain over-pressure, and this air to-gether with respirated air leaks out through ventilators, ilters ~
or other places where air may escape around the neck of the user. :
French patent No. 1,599,791). `~
If enough air is forced lnto these hoods to ensure `
that respirated air and evaporated perspiration with certainty are abducted~ this will lead to a cold draught against the fa¢e.of the user.
The ai~ of the invention is to pro~ide a new and betterprotection-hood o the a~ove mentioned type, in which the mention-ed disadvantaqes are a~oided.
-, .
1' :: .
: . ; . ,,, . ... ,. , .. : -. , ., .: : - , . . . . . .
~0~82~;~
The present invention is broadly defined as a helmet adapted completely to surround the head of the user and having means to seal the helme-t to the user's body, -the h~lmet being of double-walled construction comprising a pair of spaced inner and outer walls of stiff material, the inner wall having an opening in front and at least the outer wall being transparent at least where it overlies the opening, partition means ex-tending between the inner and outer walls from the top of the opening of the inner wall rearwardly and downwardly to the bot~om of the rear of the helmet, means to supply air to the space between the walls on one side of the partition means, and means to remove air from the space between the walls on the other side of the partition means whereby air passes from the supply means between the walls past the opening and again between the walls of the removing means.
The advantages of this protec-tion-hood are that it enables one to lead relatively large quantities of air through the hood without imposing dangerous draughts on the wearer, at the same time as clean breathing air with a high amount of oxygen is maintained within the mask without impair-ing vision with condensed breathing vapour.
Since the protection-hood is made of a stiff, clear ~; material, and since the collar is made in an elastic material,~
a good view from the mask i9 achieved. The double wa].ls will help to xeduce the noise from the outside sources, of ten found in working places with dust or dangerous gases, as for example in mines, workshops and chemical industries.
The invention will be further described by the follow-ing with reference to the drawlngs, and other characteristics of the invention will also be seen from this description.
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In the drawings, Figure 1 shows a section of the protection-hood along the line A-A of Figure 2, Figure 2 shows a section of the hood along the line C-C of Figure 1, and, Figure 3 shows a section along the line B-B of Figure 2.
The protection-hood is in the P~igures 1 through
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In the drawings, Figure 1 shows a section of the protection-hood along the line A-A of Figure 2, Figure 2 shows a section of the hood along the line C-C of Figure 1, and, Figure 3 shows a section along the line B-B of Figure 2.
The protection-hood is in the P~igures 1 through
3 marked with the re~e~ence number 1 in general. It con-sists mainly of an outer wall 2, an i.nner wall 3 as well as a stiff partition wall 4, made in clear plastic, for example "LEXAN" ~r To the outer wall 2 on both sides of.the par-tition wall 4 are secured two connectors for connecting of air-hoses 5 and 6 such a way that air can be passed through one of the hoses into the space 7 between the walls 2 and 3 and thereafter out of the hood through the other hose. As driv-iny force for the air can for example a fan (not shown) be used, either with the suction-side connected to one of ,: ~
i~ -20 the hoses 5 or 6 (for under pressure ventilation) or the , - pressure-side connected to one of the hoses 5 or 6 (for over-pressure ventilation).
To the hose through wliich the air flows into. the ~; hood,is connected a cammon ~ilter (not ~hown) for absorbtion of dangerous and poisonous gases and aerosols. This hose can r ... in the case of under~pressure-ventilation, be omitted and the ,i: , .
'.~ filter mounted directly upon the hood.
On the end of the inner wall 3, which is meant to . stay in front of the mouth and the nose of the user, an !
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~482~03 opening 8 is provided, so the air, because of the partition-ing wall 4 is fed past the opening so the user thereby may breathe freely without any resistance from any ventilators etc.
The lower edges of the outer and inner walls 2 and 3, may be made with flanges 9 and 10, which may be fastened in an adequate way 7 as for example by nuts and screws 11. To the flange 10 on the inner wall 3 is fastened a collar of air-tight material 12, which may be fastened with an elastic string around the users neck.
The protection-hood is kept in place by a harness 13 which is fastened to the inner wall 3 and may be of a similar type to that which is used in most protection helmets.
To the harness is fastened a band 14 that may be regulated, made of foam-plastic or a similar material, so it, to a certain deyree, may be fitted or regulated to size or headshape. There are also at proper places fastened straps 15 that may be fastened under the chin of the user.
When in use, unpolluted air is fed past by the opening 8, without the user being subjected to any noticeable draught, at the same time as sufficient air is passed through the hood l, so that used air and water vapour will be abducted.
An advantageous construction is to arrange for the partition wall 4 to run along the whole vertical length of the hood, and hoses 5 and 6 are attached to the bottom o~ the back o~
the hood, and on either side o~ the parkition wall 4, as the user then may work relatively freely.
It is obvious that changes may be made in the construction shown on the drawings. ~mong others, supporters that reach down to the shoulders of the user may be constructed.
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i~ -20 the hoses 5 or 6 (for under pressure ventilation) or the , - pressure-side connected to one of the hoses 5 or 6 (for over-pressure ventilation).
To the hose through wliich the air flows into. the ~; hood,is connected a cammon ~ilter (not ~hown) for absorbtion of dangerous and poisonous gases and aerosols. This hose can r ... in the case of under~pressure-ventilation, be omitted and the ,i: , .
'.~ filter mounted directly upon the hood.
On the end of the inner wall 3, which is meant to . stay in front of the mouth and the nose of the user, an !
,: .
~ T ~ ~ Rr k 3 _ ~
~482~03 opening 8 is provided, so the air, because of the partition-ing wall 4 is fed past the opening so the user thereby may breathe freely without any resistance from any ventilators etc.
The lower edges of the outer and inner walls 2 and 3, may be made with flanges 9 and 10, which may be fastened in an adequate way 7 as for example by nuts and screws 11. To the flange 10 on the inner wall 3 is fastened a collar of air-tight material 12, which may be fastened with an elastic string around the users neck.
The protection-hood is kept in place by a harness 13 which is fastened to the inner wall 3 and may be of a similar type to that which is used in most protection helmets.
To the harness is fastened a band 14 that may be regulated, made of foam-plastic or a similar material, so it, to a certain deyree, may be fitted or regulated to size or headshape. There are also at proper places fastened straps 15 that may be fastened under the chin of the user.
When in use, unpolluted air is fed past by the opening 8, without the user being subjected to any noticeable draught, at the same time as sufficient air is passed through the hood l, so that used air and water vapour will be abducted.
An advantageous construction is to arrange for the partition wall 4 to run along the whole vertical length of the hood, and hoses 5 and 6 are attached to the bottom o~ the back o~
the hood, and on either side o~ the parkition wall 4, as the user then may work relatively freely.
It is obvious that changes may be made in the construction shown on the drawings. ~mong others, supporters that reach down to the shoulders of the user may be constructed.
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The shown connec-tion of the inner and outer walls ~ and 3, as well as of the collar 12 may be affected by means of gluing, welding ~tc., and the choice oE material may depend on the use of the hood l. It is also possible to construct the hood or the helmet-mask from some other material than clear plastic. Under working conditions where the plastic may be attacked by chemicals or other materials, it might be nec~ssary to con-struct at least the viewing section of glass or a similar material, and the rest of the stiff part of the hood may be constructed of, for instance, alumin~um. Even though the -~ ` hood, according to the invention, is specially designed for protection against du~t, gasest etc., it is obvious that it "~ ' ' ;
may also be used when diving in shallow waters. The advantage ~ of the hood in such cases is that it is easy to breathe in, '~ and draughts are avoided.
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:: : .. ,: .,: . , . : ~ : .,, ., .. : . . :, . .. . . .
The shown connec-tion of the inner and outer walls ~ and 3, as well as of the collar 12 may be affected by means of gluing, welding ~tc., and the choice oE material may depend on the use of the hood l. It is also possible to construct the hood or the helmet-mask from some other material than clear plastic. Under working conditions where the plastic may be attacked by chemicals or other materials, it might be nec~ssary to con-struct at least the viewing section of glass or a similar material, and the rest of the stiff part of the hood may be constructed of, for instance, alumin~um. Even though the -~ ` hood, according to the invention, is specially designed for protection against du~t, gasest etc., it is obvious that it "~ ' ' ;
may also be used when diving in shallow waters. The advantage ~ of the hood in such cases is that it is easy to breathe in, '~ and draughts are avoided.
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Claims (3)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A helmet adapted completely to surround the head of the user and having means to seal the helmet to the user's body, the helmet being of double-walled construction compris-ing a pair of spaced inner and outer walls of stiff material, the inner wall having an opening in front and at least the outer wall being transparent at least where it overlies said opening, partititon means extending between the inner and outer walls from the top of the opening of the inner wall rearwardly and downwardly to the bottom of the rear of the helmet, means to supply air to the space between said walls on one side of said partition means, and means to remove air from the space between said walls on the other side of said partition means whereby air passes from said supply means between said walls past said opening and again between said walls to said removing means.
2. A helmet as claimed in claim 1, said partition means being disposed in the vertical plane of symmetry of the helmet.
3. A helmet as claimed in claim 1, in which said walls are of clear plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA76252458A CA1048203A (en) | 1976-05-13 | 1976-05-13 | Protection-hood or helmet-mask for use in environments dangerous to work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA76252458A CA1048203A (en) | 1976-05-13 | 1976-05-13 | Protection-hood or helmet-mask for use in environments dangerous to work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1048203A true CA1048203A (en) | 1979-02-13 |
Family
ID=4105955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA76252458A Expired CA1048203A (en) | 1976-05-13 | 1976-05-13 | Protection-hood or helmet-mask for use in environments dangerous to work |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1048203A (en) |
-
1976
- 1976-05-13 CA CA76252458A patent/CA1048203A/en not_active Expired
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