GB2409152A - Hood with airflow apertures - Google Patents
Hood with airflow apertures Download PDFInfo
- Publication number
- GB2409152A GB2409152A GB0424584A GB0424584A GB2409152A GB 2409152 A GB2409152 A GB 2409152A GB 0424584 A GB0424584 A GB 0424584A GB 0424584 A GB0424584 A GB 0424584A GB 2409152 A GB2409152 A GB 2409152A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hood
- apertures
- section
- yarns
- range
- 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
- 239000000463 material Substances 0.000 claims abstract description 28
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003063 flame retardant Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 44
- 229920003235 aromatic polyamide Polymers 0.000 claims description 21
- 210000002268 wool Anatomy 0.000 claims description 12
- 239000004760 aramid Substances 0.000 claims description 11
- 239000002356 single layer Substances 0.000 claims description 7
- 229920000297 Rayon Polymers 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
- A62B17/04—Hoods
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
Abstract
A hood comprises a head and neck portion 1, a shoulder portion 2 and a face aperture 14. The head and neck portion 1 comprises pieces of material 5, 6, 7 and a section 8 having apertures 9 which allow airflow into the hood. The material may be flame retardant, and the pieces 5, 6, 7 may comprise two layers with a moisture management layer (16, Fig 3) inbetween. The apertured section 8 may comprise three pieces of material (40, 41, 42, Fig 7). The hood may be used by fire-fighters.
Description
1 2409152
A HOOD
The present invention relates to a hood for wear. The hood may be separate or form part of a larger garment.
The hood is intended particularly, but not exclusively for fire fighters and others in similar hazardous occupations. Hoods for fire fighters made of flame retardant materials are already well known.
However, they suffer from the disadvantage that they promote high temperatures inside the hood causing heat stress, especially when the wearer is exposed to high ambient temperatures for prolonged periods of time. It is an object of the invention to mitigate this disadvantage.
According to the present invention there is provided a hood for wear comprising a head portion, a neck portion, a face aperture leading into the head portion and a section in the head portion having a multiplicity of apertures allowing the passage of air there through.
In a preferred embodiment of the invention, the hood is made of one or two layers of flame retardant knitted materials and an inner layer of flame retardant moisture management material. This inner layer comprises a double layer plated knit having yarns on the inside and yarns on the outside. The yarns may be wool yarns or para-aramid/meta-aramid yarns in either or both layers. Alternatively, a single layer comprising a mixture of wool or flame retardant viscose and para-aramid/meta-aramid yarns may replace the double layer. This allows moisture vapour created by increased body heat in the head and neck regions to be absorbed by the wool layer which then passes through the aramid layer and into the outer layer or layers keeping the air layer next to the skin cool and dry. In an alternative the double layer may be replaced by a single layer of carbon fibre. The passage of air through the hood created by the section in the top of the head also facilitates this process. The section in the head portion may vary in shape and size. It may be circular, square, triangular or any other suitable shape. It may be made of the same material as the remainder of the hood or of a different material.
When made of the same material the section may be integral with the remainder of the hood. The diameter of the apertures, their number and spacing in the section may also be varied as desired. The diameter of the apertures may lie in the range 1 to 4mm, and preferably in the range 1 to 2mm. The number of apertures per square centimetre may lie in the range 3 to 6, and preferably in the range 4 to 5. The spacing between apertures may be in the range 1 to 4mm and preferably in the range 2 to 3mm. The thickness of this section of material may vary as may the nature and construction of the stitching connecting the section. This area of the hood is not covered by any other material inside or outside of the hood.
In order that the invention may be more clearly understood, one embodiment thereof will now be described, by way of an example with reference to the accompanying drawings in which: Figure 1 shows a front view of a hood according to the invention Figure 2 shows a back view of the hood of Figure 1 Figure 3 shows a cross sectional view of the hood of Figures 1 and 2 Figure 4 is a graph showing the variation of water vapour absorption with ambient relative humidity for a moisture management layer of the hood of Figure 1 Figure 5 diagrammatically illustrates the function of a moisture management layer.
Figure 6 shows a front view of a hood of an alternative embodiment of the invention to that shown in Figure 1, and Figure 7 shows a back view of the hood of Figure 6.
Referring to Figures 1 to 3 of the drawings, the hood comprises a head and neck portion 1 and a shoulder portion 2. The two portions 1 and 2 are connected together by a line of stitching 4 which runs along the lower edge of the head and neck portion. The head portion comprises three pieces of material 5, 6 & 7 and a section 8 having a multiplicity of apertures some of which are indicated at 9. The three pieces 5, 6 & 7 and 8 are connected together by lines of stitching 10, 11, 12 & 13. The materials of the pieces 5, 6, 7 & 8 are flame retardant. The structure of pieces 5, 6, & 7 comprises two parallel layers. The front of the hood defines a facial aperture 14. The periphery 15 of the aperture 14 is elasticated. A moisture management fabric layer 16 extends over the inner surface of the hood except for section 8. This layer is represented by a dashed line in Figure 3 and comprises a double layer plated knit having yarns on the inside and yarns on the outside. The yarns may be wool yarns or para-aramid/meta-aramid yarns in either or both layers.
Alternatively, a single layer comprising a mixture of wool or flame retardant viscose and para-aramid/meta-aramid yarns may replace the double layer. This allows moisture vapour created by increased body heat in the head and neck regions to be absorbed by the first layer which then passes through the next layer and into the outer layer or layers keeping l the air layer next to the skin cool and dry. Figure 4 is a graph showing the variation of water vapour absorption with ambient relative humidity for a moisture management layer of the hood of Figure 1 where the material of the layer is a meta-aramid/wool or para-aramid/wool combination (curve P) and the material of the layer is a meta-aramid or para-aramid (curve M). As can be seen, the addition of wool significantly improves moisture vapour absorption. Figure 5 diagrammatically illustrates the function of a moisture management layer. In the area 20 between the surface of the skin 21 moisture vapour is produced in a cool and dry zone producing a comfortable micro climate. This vapour is absorbed by the inner part of layer 22 and dispersed through the outer part into the atmosphere 23. Section 8 is rectangular in shape and extends over a substantial part of the head portion. The diameter of the apertures may lie in the range 1 to 4mm and preferably in the range 1 to 2mm. The number of apertures per square centimetre may lie in the ranges to 6 and preferably in the range 4 to 5. The spacing between apertures may be in the range 1 to 4mm and preferably in the range 2 to 3mm. The thickness of the material from which the hood is made may also vary as may the nature and construction of the stitching connecting the section.
In use the wearer wears a face mask (shown at 18 on Figure 3) which effectively closes off aperture 14 to airflow. The multiplicity of holes 9 permit air to flow through the hood when worn in the direction of the arrows shown in 8. The wearer will also normally wear a helmet on top of the hood. The airflow promoted by section 8 over the inner surface of the hood has a ventilating and cooling effect promoting greater comfort for the wearer.
Figures 6 and 7 show an alternative hood to that shown in Figures 1 and 2. In this alternative, the hood comprises a head and neck portion 31 and a shoulder portion 32. The two portions 31 and 32 are connected together by a line of stitching 4 which runs along the lower edge of the head and neck portion. The head and neck portion comprises three pieces of material, 35, 36 and 37 and a section having a multiplicity of apertures some of which are indicated at 39. The apertured section is itself composed of three pieces 40, 41 and 42. Lines of stitching indicated at 43, 44, 45 and 46 connect the various pieces together. In other respects the hood is the same as the hood of Figures 1 to 3.
It will be appreciated that the above embodiment has been described by way of example only and that many variations are possible without departing from the scope of the invention.
For example section 8 may vary in shape and size. It may be circular, square, triangular or any other suitable shape. It may be made of the same material as the remainder of the hood or of a different material.
When made of the same material the section may be integral with the remainder of the hood. The diameter of the apertures, their number and spacing in the section may also vary as desired.
Claims (17)
1. A hood for wear comprising a head portion, a neck portion, a face aperture leading into the head portion and a section in the head portion having a multiplicity of apertures allowing the passage of air there through.
2. A hood as claimed in claim 1, in which parts of the hood comprise one or two layers of flame retardant knitted materials and an inner layer of flame retardant moisture management material.
3. A hood as claimed in claim 2, in which the inner layer comprises a double layer plated knit having yarns on the inside and yarns on the outside.
4. A hood as claimed in claim 3, in which the yarns are wool yarns or para-aramid/meta-aramid yarns in either or both layers.
5. A hood as claimed in claim 3, in which the inner layer comprises a single layer comprising a mixture of wool or flame retardant viscose and para-aramid/meta-aramid yarns.
6. A hood as claimed in claim 2, in which the inner layer comprises a single layer of carbon fibre.
7. A hood as claimed in any preceding claim, in which the section having a multiplicity of apertures is made of the same material as the remainder of the hood.
8. A hood as claimed in claim 7, in which, when the section is made of the same material as the remainder of the hood, it is integral with the remainder of the hood.
9. A hood as claimed in any preceding claim, in which the section is square.
10. A hood as claimed in any of claims 1 to 8, in which the section is circular.
11. A hood as claimed in any of claims 1 to 9, in which the section is triangular.
12. A hood as claimed in any preceding claim, in which the diameter of the apertures lies in the range 1 to 4 mm.
13. A hood as claimed in claim 12, in which the diameter of the apertures lies in the range of 1 to 2 mm.
14. A hood as claimed in any preceding claim, in which the number of apertures per square centimetre lies in the range 3 to 6.
15. A hood as claimed in claim 14, in which the number of apertures per square centimetre lies in the range 4 to 5.
16. A hood as claimed in any preceding claim, in which spacing between apertures lies in the range 1 to 4 mm.
17. A hood for wear substantially as hereinbefore described with reference to Figure 1 to 5 or to Figures 6 and 7 of the accompanying drawings.
17. A hood as claimed in claim 16, in which spacing between apertures lies in the range 2 to 3 mm.
18. A hood for wear substantially as hereinbefore described with reference to Figure 1 to 5 or to Figures 6 and 7 of the accompanying drawings.
Amendments to the claims have been filed as follows
1. A hood for wear comprising a head portion, a neck portion, a face aperture leading into the head portion and a section in the head portion having a multiplicity of apertures allowing the passage of air there through, in which parts of the hood comprise one or two layers of flame retardant knitted materials and an inner layer of flame retardant moisture management material.
2. A hood as claimed in claim 1, in which the inner layer comprises a double layer plated knit having yarns on the inside and yarns on the outside.
3. A hood as claimed in claim 2, in which the yarns are wool yarns or para-aramid/meta-aramid yarns in either or both layers.
4. A hood as claimed in claim 2, in which the inner layer comprises a single layer comprising a mixture of wool or flame retardant viscose and para-aramid/meta-aramid yarns.
5. A hood as claimed in claim 1, in which the inner layer comprises a single layer of carbon fibre.
6. A hood as claimed in any preceding claim, in which the section having a multiplicity of apertures is made of the same material as the remainder of the hood.
7. A hood as claimed in claim 6, in which, when the section is made of the same material as the remainder of the hood, it is integral with the remainder of the hood.
8. A hood as claimed in any preceding claim, in which the section is square.
9. A hood as claimed in any of claims 1 to 7, in which the section is circular.
10. A hood as claimed in any of claims 1 to 8, in which the section is triangular.
11. A hood as claimed in any preceding claim, in which the diameter of the apertures lies in the range 1 to 4 mm.
12. A hood as claimed in claim 1 1, in which the diameter of the apertures lies in the range of 1 to 2 mm.
13. A hood as claimed in any preceding claim, in which the number of apertures per square centimetre lies in the range 3 to 6.
14. A hood as claimed in claim 13, in which the number of apertures per square centimetre lies in the range 4 to 5.
15. A hood as claimed in any preceding claim, in which spacing between apertures lies in the range 1 to 4 mm.
1 5 16. A hood as claimed in claim 15, in which spacing between apertures lies in the range 2 to 3 mm.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0326008.0A GB0326008D0 (en) | 2003-11-06 | 2003-11-06 | A hood |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0424584D0 GB0424584D0 (en) | 2004-12-08 |
| GB2409152A true GB2409152A (en) | 2005-06-22 |
| GB2409152B GB2409152B (en) | 2006-07-12 |
Family
ID=29726124
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0326008.0A Ceased GB0326008D0 (en) | 2003-11-06 | 2003-11-06 | A hood |
| GB0424584A Expired - Fee Related GB2409152B (en) | 2003-11-06 | 2004-11-08 | A hood |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0326008.0A Ceased GB0326008D0 (en) | 2003-11-06 | 2003-11-06 | A hood |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB0326008D0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2547037A (en) * | 2016-02-05 | 2017-08-09 | Respirex Int Ltd | Protective suit |
| CN108472522A (en) * | 2015-12-31 | 2018-08-31 | 霍尼韦尔国际公司 | The protective hood made of variable stretch knitting and Woven textiles material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4972520A (en) * | 1989-05-26 | 1990-11-27 | Grilliot William L | Ventilated hood for firefighter |
| GB2232874A (en) * | 1989-05-24 | 1991-01-02 | Beverley Ian Mattinson | Anti-flash hood |
| US5816243A (en) * | 1997-12-24 | 1998-10-06 | Georgiou; Panayis | Air supply apparatus |
| US5836303A (en) * | 1996-09-17 | 1998-11-17 | Thermal Air Products, Inc. | Respirator apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5691040A (en) * | 1995-12-18 | 1997-11-25 | Marcanada Inc. | Liner for firefighter garment made of a laminate of a woven fabric and a non-woven material |
-
2003
- 2003-11-06 GB GBGB0326008.0A patent/GB0326008D0/en not_active Ceased
-
2004
- 2004-11-08 GB GB0424584A patent/GB2409152B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232874A (en) * | 1989-05-24 | 1991-01-02 | Beverley Ian Mattinson | Anti-flash hood |
| US4972520A (en) * | 1989-05-26 | 1990-11-27 | Grilliot William L | Ventilated hood for firefighter |
| US5836303A (en) * | 1996-09-17 | 1998-11-17 | Thermal Air Products, Inc. | Respirator apparatus |
| US5816243A (en) * | 1997-12-24 | 1998-10-06 | Georgiou; Panayis | Air supply apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108472522A (en) * | 2015-12-31 | 2018-08-31 | 霍尼韦尔国际公司 | The protective hood made of variable stretch knitting and Woven textiles material |
| CN108472522B (en) * | 2015-12-31 | 2021-07-09 | 霍尼韦尔国际公司 | Protective hood made of variable stretch knitted and woven textile material |
| GB2547037A (en) * | 2016-02-05 | 2017-08-09 | Respirex Int Ltd | Protective suit |
| GB2547037B (en) * | 2016-02-05 | 2021-06-02 | Respirex Int Ltd | Protective suit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0424584D0 (en) | 2004-12-08 |
| GB2409152B (en) | 2006-07-12 |
| GB0326008D0 (en) | 2003-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20131108 |