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EP1260247A1 - Integrierte leichtgewichtigen chemischen Schutzhaube für Schutzhelm - Google Patents

Integrierte leichtgewichtigen chemischen Schutzhaube für Schutzhelm Download PDF

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Publication number
EP1260247A1
EP1260247A1 EP02077024A EP02077024A EP1260247A1 EP 1260247 A1 EP1260247 A1 EP 1260247A1 EP 02077024 A EP02077024 A EP 02077024A EP 02077024 A EP02077024 A EP 02077024A EP 1260247 A1 EP1260247 A1 EP 1260247A1
Authority
EP
European Patent Office
Prior art keywords
hood
helmet
chemical protective
protective hood
single layer
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.)
Withdrawn
Application number
EP02077024A
Other languages
English (en)
French (fr)
Inventor
Julie Tremblay-Lutter
Tannis Grant
Scott Duncan
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.)
Minister of National Defence of Canada
UK Secretary of State for Defence
Original Assignee
Minister of National Defence of Canada
UK Secretary of State for Defence
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
Application filed by Minister of National Defence of Canada, UK Secretary of State for Defence filed Critical Minister of National Defence of Canada
Publication of EP1260247A1 publication Critical patent/EP1260247A1/de
Withdrawn legal-status Critical Current

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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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D5/00—Composition of materials for coverings or clothing affording protection against harmful chemical agents

Definitions

  • the present invention relates to a protective hood to be worn over a respirator when used in hazardous environments such as those where nuclear, chemical and biological agents may exist and, in particular, to a hood that is positionable over respirators when used with aircrew flight helmets.
  • NBC biological and chemical
  • personnel must wear protective clothing and respirators, in addition to their regular equipment, to protect themselves from those type of agents.
  • the protective clothing must not impair the intended function of the headgear.
  • the helmet that is worn by aircrew has several functions that must be maintained, even during NBC operations. These functions include, for instance, protection of the head in the event of a crash, protection of ears against excessive noise and the provision of means for electronic communications. If a protective hood is to be worn under the headgear, then it must not cause discomfort to the wearer, or at least minimize any discomfort, and it must maintain the functions of the headgear to an acceptable level.
  • Chemical protective (CP) hoods that are presently available are made from multiple layers of materials or from polymers. Multiple layer CP hoods are described in Canadian Patent Application 2,027,850 that was filed on October 17, 1990. These multi-layered hoods are thick and cannot be worn underneath aircrew helmets, such as a SPH5-CF helmet, without requiring some modification to the helmet. Layers in the Thermal Plastic Liner (TPL) in the SPH5-CF helmet or in some cases the entire impact protective layers need to be removed to enable the donning of this helmet over a multi-layered chemical protective hood. One alternative would be to don a thinner rubber hood. The rubber hoods would, however, impose an undue thermal stress on users in hot climates or in heated aircrafts.
  • TPL Thermal Plastic Liner
  • Thin air impermeable polymer hoods and multi-layered filter barrier hoods are two types which are currently available.
  • the polymer hoods are thin but impose an undue thermal burden on users.
  • the seams of these polymer hoods are rigid and may cause hot spots or stress points underneath the hood and, furthermore, they offer a poor seal with respirators such as the Canadian Forces (CF) AC4.
  • the multi-layered filter barrier hoods such as the CF in-service hoods are made from a thick barrier layer and separate outer layer sewn separately. This causes extra bulk in seam areas and can only be worn if TPL layers are removed from the SPH5 helmet which would compromise the impact safety and the head protection provided by this helmet.
  • a chemical protective hood to be worn over a respirator in a manner such that it is located between a helmet and the respirator comprises a skirt portion of filter barrier material containing an opening with edges configured to surround and fit against a respirator's facepiece, a top portion of the hood being formed of a thin single layer that fits under a helmet, the thin single layer being configured to match the curved inner surface of the helmet.
  • the helmet that is worn by aircrews has several functions that must be maintained even during nuclear, biological and chemical (NBC) manoeuvres where NBC protective clothing must be worn. These functions include protection of the head in the event of a crash, protection of ears against excessive noise and the provision of means for electronic communication.
  • An NBC chemical protective hood when worn under the headgear along with a respirator should not cause discomfort to the wearer, or at least should minimize any discomfort, and it must allow the functions of the helmet to be maintained at an acceptable level.
  • the present SPH5-CF helmet shell illustrated in Fig. 1 and identified by the number 10 is a nylon, graphite and fibreglass cloth composition with black rubber edge beading.
  • Components located inside of the helmet shell 10 include an energy absorbing liner 12 (see Fig. 2) to absorb and reduce impact forces and a pre-formed thermoplastic liner (TPL) 14 that sits inside the energy absorbing liner 12.
  • the energy absorbing liner 12 is formed from rigid foamed white polystyrene plastic and is moulded to conform to the contour of the shell's inner surface. Hook fastener tabs on the outside surface of the liner mate with pile fastener on the inside of the shell 10 to secure the liner in place. Hook fastener tabs on the inside surface of the liner secure the TPL 14 to the energy absorbing liner 12.
  • the pre-formed TPL 14 provides a comfortable inner helmet which can be custom fit to an individual head size. It consists of a plastic layer assembly and a removable, washable cloth cover.
  • the TPL cloth cover is an air permeable black fabric featuring sides made of pile material to allow attachment to the hook fastener tabs on the energy absorbing liner 12.
  • the TPL is pre-formed in three sizes and can be custom fitted by removing any of the eight separate layers of plastic from the TPL.
  • the multi-layered hood 18 shown in Fig. 4 is a dual-layer air-permeable hood composed of a thick inner charcoal-impregnated fabric layer for vapour protection and an outer liquid-repellent and flame-retardant Kermel (trade-mark) fabric layer.
  • the hood has a front opening with edges that surround and fit against the facepiece of the respirator.
  • the assembly of the respirator 16, hood 18 and helmet 10 is illustrated in Fig. 5.
  • 80% would need a larger size helmet to operate with chemical defence headgear while 20% would require modification to the TPL 14 of the SPH5 helmet.
  • 75% of the subjects using a SPH5 helmet could not don their helmets over the respirator and hood. Modifying the TPL or issuing two sizes of helmets is possible but an expensive alternative and would not be feasible for those requiring larger size helmets.
  • An alternative would be to use a polymer hood 19 as illustrated in Fig. 6 rather than a multi-layered hood.
  • the polymer hoods are thin but, however, impose an undue thermal burden and offer a poor seal with respirators such as the AC4.
  • An integrated hood according to the present invention provides a solution to the above-mentioned problems in that it is thin enough above the respirator not to compromise the fit underneath the helmet and it also provides chemical protection to the pilots without compromising the protection and functions of the helmets.
  • the low burden integrated chemical protective hood 20 according to the present invention is illustrated in Fig. 7 where 7(A) is a front view of hood 20 assembled over a respirator 16, 7(B) being a side view and 7(C) a back view of the assembly.
  • the hood 20 is composed of two portions, a multi-layer lower skirt portion 22 similar to the bottom of hood 18 in Fig.
  • the main body skirt portion 22 of the hood 20 is constructed of a single or multi-layered filter barrier material while the area underneath the helmet, i.e. under the TPL in a SPH5 helmet, is formed of a thin single layer 24.
  • the portion of the hood that fits under the TPL is formed as a mesh, e.g. a polyester mesh 24, as shown in Fig. 7A, B and C to minimize the bulk wherever there is contact with helmet and to minimize any heat stress.
  • the area that is married to the helmet needs to be suitably sized in order to prevent toxic vapours from reaching the skin of the users.
  • the thin single layer 24 is formed of thin single layer of activated carbon impregnated filter material such as carbon impregnated lycra which would maintain some vapour protection in that area of the hood.
  • the mesh portion should be perfectly matched with the outer edges of the TPL so that the filter material provides optimum protection in areas where the helmet may not be fitted tightly to the head.
  • the thin single layer may be made of woven, knit or non-woven material.
  • the integrated hood 20 provides a proper and comfortable fit for the user, does not compromise the impact protection of the helmet or impose an undue heat load in the head area.
  • the Protective Factors (PF) of a CP lightweight hood and CP polymer hood, measured on a head form at various regions in a controlled environmental chamber using a chemical agent stimulant vapour are shown in Fig. 8.
  • the PFs for a new light-weight chemical protective hood with a polyester mesh portion under the TPL typically ranged between 1000 and 10000+ over the majority of the regions of the head.
  • a PF of 50000 was obtained at the top scalp which essentially reflects a complete absence of chemical vapour in this region and is the result of the extremely tight fit achieved between the thermoplastic liner and the thin mesh layer of the hood at this location. Therefore, this hood provides very good protection without the use of carbon absorbent at locations where equipment interfaces tightly with the body.
  • the thin mesh layer permits the helmet to be used without removing any structural components from the liner to achieve a safe comfortable fit.
  • the measured PFs determined for a chemical protective polymer hood were, in sharp contrast to the integrated hood, generally less than 100 over all regions of the head with the exception of the top scalp, right ear and under the respirator.
  • the measured PFs for the polymer hood are shown in Fig. 8 where they can be compared with the PFs obtained for the integrated hood.
  • the polymer hood based on the results of the measured PFs, offers between 10 and 100 times less chemical vapour protection than the new light-weight chemical protective hood over most regions of the head. It should be noted that the dosage used in the vapour test on the polymer hood was one half that of the dosage used for the tests on the other hood. It is strongly suspected that the protection afforded by hoods that contain no carbon absorbent may be concentration-time dependent, i.e. the longer that it is worn or the higher the vapour concentration during an exposure, the lower the protection to the user.
  • the measured PFs shown in Fig. 8 clearly show that the chemical protective hood according to one embodiment of the present invention provides superior vapour protection compared to a typical polymer hood.
  • this new light-weight chemical protective hood concept offers improved fit and comfort with the potential for a significant reduced thermal burden when compared to a 100% polymer hood.
  • top portion and a layer of the skirt portion may be formed of a single layer, permeable, highly absorbent chemical protective carbon barrier material.
  • An ultra-thin insert at the top of hood that is configured to match the curved surface area of the thermoplastic liner inside the aircrew helmet may be used in other versions.

Landscapes

  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Helmets And Other Head Coverings (AREA)
EP02077024A 2001-05-24 2002-05-23 Integrierte leichtgewichtigen chemischen Schutzhaube für Schutzhelm Withdrawn EP1260247A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29292901P 2001-05-24 2001-05-24
US292929P 2001-05-24

Publications (1)

Publication Number Publication Date
EP1260247A1 true EP1260247A1 (de) 2002-11-27

Family

ID=23126857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02077024A Withdrawn EP1260247A1 (de) 2001-05-24 2002-05-23 Integrierte leichtgewichtigen chemischen Schutzhaube für Schutzhelm

Country Status (3)

Country Link
US (1) US20020174481A1 (de)
EP (1) EP1260247A1 (de)
CA (1) CA2385731A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8661572B2 (en) 2007-09-06 2014-03-04 Artisent, Llc Helmet edge band

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8225428B2 (en) * 2008-08-08 2012-07-24 Honeywell International Inc. Protective hood
US10980305B2 (en) * 2017-10-05 2021-04-20 Honeywell International Inc. Length adjustable shroud usable with helmet and earmuffs
US11166497B1 (en) 2021-04-16 2021-11-09 Larin Company Protective headgear

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502537A (en) * 1966-01-04 1970-03-24 Bondina Ltd Air-permeable protective materials
US3586596A (en) * 1965-09-20 1971-06-22 Technology Uk Protective clothing
DE3108604A1 (de) * 1981-02-13 1982-08-19 Hasso von 4000 Düsseldorf Blücher Einlagiges schutzmaterial und verfahren zu dessen herstellung
USH823H (en) * 1987-05-07 1990-10-02 The United States Of America As Represented By The Secretary Of The Air Force Chemical protective balaclava
CA2027850A1 (en) 1990-10-17 1992-04-18 Pierre P. Meunier Stretchable protective fabric and protective apparel made therefrom
US5653225A (en) * 1992-01-30 1997-08-05 Intertechnique Individual protective and breathing equipment for contaminated environments
EP0885632A1 (de) * 1997-06-10 1998-12-23 Intertechnique In feindlich gesinnter Umgebung verwendbare Schutzvorrichtung gegen Hypoxie
US5887276A (en) * 1997-11-21 1999-03-30 Lee; Song Hwi Cooling cap

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838467A (en) * 1972-11-01 1974-10-01 Zwicker Knitting Mills Cap and elastic face hood
GB1587121A (en) * 1976-05-14 1981-04-01 Secr Defence Protective clothing
US4266301A (en) * 1979-12-05 1981-05-12 The United States Of America As Represented By The Secretary Of The Air Force Chemical-biological agent protective hood
GB2148697B (en) * 1983-10-31 1987-07-29 Camberley Rubber Moulding Limi Under helmet hood
US4573217A (en) * 1984-07-30 1986-03-04 Reed Clifford C Protective hood for firefighters
US4610247A (en) * 1984-09-20 1986-09-09 Arctic Temperature Controls Cold weather breathing apparatus
US5090054A (en) * 1989-05-26 1992-02-25 Grilliot William L Ventilated hood for firefighter
IT1238868B (it) * 1990-02-21 1993-09-04 Prometeo Spa Equipaggiamento protettivo ignifugo per l'esecuzione di attivita' che comportano un rischio di ustione.
US5095549A (en) * 1990-11-29 1992-03-17 Lion Apparel, Inc. Firefighter pant support system
USH1360H (en) * 1991-04-24 1994-10-04 The United States Of America, As Represented By The Secretary Of The Army Lightweight protective gas mask and hood
US5245993A (en) * 1991-10-31 1993-09-21 The Boeing Company Pilot's ensemble with integrated threat protection
US5836303A (en) * 1996-09-17 1998-11-17 Thermal Air Products, Inc. Respirator apparatus
US6328031B1 (en) * 1997-03-20 2001-12-11 Michael Scott Tischer Firefighting hood and face mask assembly
US5873132A (en) * 1998-02-02 1999-02-23 Grilliot; William L. Protective garment with attachable hood
US6662375B2 (en) * 2002-05-01 2003-12-16 Morning Pride Manufacturing, L.L.C. Protective hood, such as firefighter's hood, which has sections made from comparatively heavier and comparatively lighter materials

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3586596A (en) * 1965-09-20 1971-06-22 Technology Uk Protective clothing
US3502537A (en) * 1966-01-04 1970-03-24 Bondina Ltd Air-permeable protective materials
DE3108604A1 (de) * 1981-02-13 1982-08-19 Hasso von 4000 Düsseldorf Blücher Einlagiges schutzmaterial und verfahren zu dessen herstellung
USH823H (en) * 1987-05-07 1990-10-02 The United States Of America As Represented By The Secretary Of The Air Force Chemical protective balaclava
CA2027850A1 (en) 1990-10-17 1992-04-18 Pierre P. Meunier Stretchable protective fabric and protective apparel made therefrom
US5221572A (en) * 1990-10-17 1993-06-22 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Stretchable protective fabric and protective apparel made therefrom
US5653225A (en) * 1992-01-30 1997-08-05 Intertechnique Individual protective and breathing equipment for contaminated environments
EP0885632A1 (de) * 1997-06-10 1998-12-23 Intertechnique In feindlich gesinnter Umgebung verwendbare Schutzvorrichtung gegen Hypoxie
US5887276A (en) * 1997-11-21 1999-03-30 Lee; Song Hwi Cooling cap

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8661572B2 (en) 2007-09-06 2014-03-04 Artisent, Llc Helmet edge band
US9572387B2 (en) 2007-09-06 2017-02-21 Artisent, Llc Helmet edge band

Also Published As

Publication number Publication date
US20020174481A1 (en) 2002-11-28
CA2385731A1 (en) 2002-11-24

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