EP0492984B1 - Schutzhelm - Google Patents

Schutzhelm Download PDF

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Publication number
EP0492984B1
EP0492984B1 EP91311796A EP91311796A EP0492984B1 EP 0492984 B1 EP0492984 B1 EP 0492984B1 EP 91311796 A EP91311796 A EP 91311796A EP 91311796 A EP91311796 A EP 91311796A EP 0492984 B1 EP0492984 B1 EP 0492984B1
Authority
EP
European Patent Office
Prior art keywords
shell
visor
helmet
helmet according
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.)
Expired - Lifetime
Application number
EP91311796A
Other languages
English (en)
French (fr)
Other versions
EP0492984A1 (de
Inventor
Granville Collis James
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.)
Thetford Moulded Products Ltd
Original Assignee
Thetford Moulded Products Ltd
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 Thetford Moulded Products Ltd filed Critical Thetford Moulded Products Ltd
Publication of EP0492984A1 publication Critical patent/EP0492984A1/de
Application granted granted Critical
Publication of EP0492984B1 publication Critical patent/EP0492984B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/28—Ventilating arrangements
    • A42B3/286—Ventilating arrangements with forced flow, e.g. by a fan
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/16—Ear protection devices
    • A42B3/166—Integral hearing protection
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/18—Face protection devices
    • A42B3/22—Visors
    • A42B3/225—Visors with full face protection, e.g. for industrial safety applications
    • 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
    • A62B18/04—Gas helmets
    • A62B18/045—Gas helmets with fans for delivering air for breathing mounted in or on the helmet

Definitions

  • This invention concerns improvements in or relating to protective helmets for use by operatives in industrial environments.
  • the invention has reference to such helmets for use in the mining or quarrying industries wherein the need for protective headwear is especially acute. Protection is required not only to prevent physical injury but also to avoid and indeed minimise damage to the respiratory organs, to the aural, ocular and olfactory senses.
  • Protective helmets in the form of powered helmet respirators are already known and generally include a protective shell within which is provided means for introducing a filtered air supply between the wearer's face and a visor which may assume a fixed disposition on the shell or may be pivotally mounted outside the shell to allow movement into and out of an operable, i.e. protective, position in front of a wearer's face.
  • a protective helmet is shown in GB-A-2 014 036 and has a protective shell with side portions having lower rims positioned in use above the ears of a wearer's head.
  • this known helmet is not provided with ear defenders.
  • the air duct extends from the occipital region to terminate at the front part of the shell in the or each outlet which in use supplies air to the top part of the visor when in its operational extended position in front of a wearer's face, such that the interior of the visor is swept with air.
  • a plurality of outlets for the air duct the outlets being directed such as in use to sweep the interior of the visor with air and to target the marginal edges of the visor lying adjacent the wearer's face thereby to provide a pneumatic seal therearound to minimise the ingress of injurious atmospheric pollutants.
  • An inner protective skin is conveniently disposed within the shell in spaced relation thereto, the skin conveniently defining the duct between it and the internal surface of the shell. retractable.
  • the air duct extends over a substantial part of its length between the shell and the inner skin, the inner skin being bifurcated at the front part of the shell to provide both the at least one outlet and space for visor retraction.
  • the shell may be formed to give at its rear part an outer wall and at its front part an inner wall, the front part being provided with a cover to define a channel within which the visor may retract.
  • the cover in such an embodiment is so formed as to give the helmet a continuous or substantially continuous outer profile.
  • the cover may for convenience be removable and replaceable, suitable fixtures being provided for that purpose.
  • the filter may conveniently extend across the inlet to the duct, and the air mover may be disposed within the duct in rearwards of the crown of the shell.
  • the air mover is constituted by at least one fan, preferably battery powered.
  • the visor may be removably mounted in a carrier having a renewable transparent section constituting the visor per se.
  • the carrier may comprise a frame into which a renewable transparent section may be insertable.
  • the visor carrier may be slidably mounted to the interior of the shell by means of side supports each having slots with which bushes on the carrier engage to afford in use and arcuate sliding motion for the visor into and out of an operative position in front of the wearer's face.
  • Each ear defender may conveniently be provided substantially within the profile of the helmet thereby to secure that there are no protuberances which in use could constitute a source of danger by snagging.
  • the front part of the shell may be peaked and be provided with protective side cheeks which in use complement the visor and the ear defenders to provide continuity around the wearer's face.
  • the side cheeks form a proximity seal between the visor frame and the wearer's face, thus providing enhanced protection from side draughts of contaminated air.
  • the front part of the shell may be provided with a mount for a lamp such as is used in underground mining, the lamp being battery powered.
  • the cover would be provided with the mount at the front of the helmet.
  • the removable cover provides a degree of versatility whereby different fitments thereto can be provided on a range of covers.
  • a protective helmet in the form of a powered helmet respirator in position on a wearer's head 3, the respirator comprising a protective shell 2 having a rear part 4, a crown 6, a front part 8 and sides 10.
  • a head harness (not shown) is provided within the shell 2 for comfortably seating the respirator on the wearer's head 3.
  • An inner skin 12 extends from the rear part 4 to the front part 8 and defines in the occipital region an air inlet 14 across which there is provided a filter 16 of suitable fibrous material.
  • the filter 16 is received in a holder 13 so as to be easily dismountable and replaceable.
  • a further inner skin which comprises parts of the shell 4, 6, 8 extends through 4, 6 and downwards through 8 terminating in a plurality of outlets 20 in the form of slots.
  • An air duct 22 is thus defined within the shell 2 between its inner surface and the skins 12 and 4, 6 and 8.
  • a front cover 9 is fixed to the shell 2 to provide a smooth profile to the helmet exterior and with the front part of the protective shell 8, provides a space 42 into which the visor 30 may retract.
  • An air mover in the form of two battery-powered fans 24 is located within the duct 22 on sound-absorbing mounts 26 rearwards of the crown 6 of the shell 2.
  • the power for the fans 24 is conveniently provided by a body mounted battery pack (not shown) which is of such capacity as additionally to power a lamp (not shown) releasably fixable to the front part 9 on a bracket 29 provided for that purpose ( Figure 1).
  • a visor 30 comprising a carrier 32 which is releasably fixed to a transparent window 34 is slidably and pivotally mounted on supports 38 fixed to the sides of the helmet shell 2, with bushes 39 attached to the visor carrier 32.
  • the supports 38 have curved slots within which the bushes are adapted to slide.
  • the visor 30 is retractable within a space 42 defined between part 8 of the shell 2 and the inside wall of the outer cover 9.
  • the visor 30 has a stop for abutting a cut-off switch (not shown) such that when the visor is fully extended in front of the wearer's face, the power to the fan 24 is initiated. Additionally, in this position, the visor is sealed against the inner face of the outer cover 9 by a sealing strip 21.
  • the visor may alternatively seal against the outer face of the shell 8 along its lower edge.
  • a limited pivoting motion about the lower bush 39 may be provided to enable the lower part of the visor to move closer to the wearer's face, and is achieved by a small recess in the slot in the support 38 into which the upper bush may move.
  • the visor 30 in conjunction with cheek plates 52 and ear defenders 60, to be described later, on the sides 10 of the shell 2 gives panoramic protection for the front and sides of the wearer's face.
  • the visor 30 may be provided with a range of proximity seals (not shown) to reduce the distance between the visor margins and the wearer's face for the purpose of further minimising the ingress of contaminated air into the wearer's breathing zone.
  • FIG. 1 there is shown on one side of the powered helmet respirator 1 an ear defender 60 which is secured to the shell 2.
  • a corresponding ear defender (not shown) is provided on the other side of the shell.
  • the ear defender 60 conforms to the general profile of the helmet 1, and is secured to the shell 10 so that the inner face of the ear defender sits relatively close to the wearer's ears.
  • the ear defender 60 When in its correct position, the ear defender 60 is close to but not in contact with the wearer's head. In this position, noise attenuation is not achieved.
  • an inner portion (not shown) of the ear defender 60 is caused to move inwards to contact the wearer's ear, or the region therearound, by a mechanism (not shown) akin to a piston moving within a cylinder.
  • the mechanism is resiliently loaded when in its operative position to provide correct pressure against the wearer's head.
  • the helmet 1 fits snugly and comfortably on the wearer's head 3 initially with the visor 30 in its retracted position within the space 42, the fans 24 being stationary. Downward movement of the visor 30 brings it into its operative position as shown in Figure 1. At the same time release of the cut-off switch (not shown) allows power to be restored to the fans 24 which accordingly induce an air flow through the inlet 14 and the filter 16 into the duct 22 and thence to the outlets 20 whence it travels downwards between the visor 34 and the face of the wearer to ventilate same with filtered air and to provide cooling.
  • the cut-off switch (not shown) allows power to be restored to the fans 24 which accordingly induce an air flow through the inlet 14 and the filter 16 into the duct 22 and thence to the outlets 20 whence it travels downwards between the visor 34 and the face of the wearer to ventilate same with filtered air and to provide cooling.
  • the ear defenders 60 are within the general profile of the shell 2 of the helmet 1, and present no projection likely to be a hazard. Operation of a fully integrated and custom designed helmet according to the present invention in which the ear defenders are within the profile of the shell enables noise attenuation to be achieved effectively.
  • the present invention thus provides a comprehensive and versatile powered helmet respirator possessing an optimum of protective features whilst being less cumbersome and less weighty than its antecedents. Equally, replacement of the filter and of the visor window are facilitated thus reducing cost and time spent in repair.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Pulmonology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Helmets And Other Head Coverings (AREA)

Claims (16)

  1. Schutzhelm mit einer Schutzschale (2) zur Aufnahme des Kopfes des Benutzers, der an jeder Seite der Schale einen Seitenteil mit einem tieferen Seitenrand, der im Gebrauch über dem Ohr des Kopfes des Benutzers positioniert ist, aufweist, einem Visier (30) an dem vorderen Teil der Schale, das dort hinein zurückgezogen werden kann, einem in der Schale definierten Luftkanal (22), der einen Einlaß (14) zum hinteren Teil der Schale (2) und mindestens einen dem vorderen Teil der Schale zugeordneten und zu dem Visier und mindestens einigen seiner im Randbereich liegenden Kanten, die sich im Gebrauch neben dem Gesicht des Benutzers erstrecken, ausgerichteten Auslaß (20) aufweist, einem dem Kanal zugeordneten Filter und einem Luftbewegungsmittel zur Einführung von Luft in den Kanal, dadurch gekennzeichnet, daß ein Ohrenschützer (60) auf jeder Seite des Helms unter jedem tieferen Seitenrand der Schale (2) angebracht ist, wobei jeder Ohrenschützer (60) einen das Ohr berührenden Teil, der bezüglich der Schale (2) zwischen einer Außenposition, die im Gebrauch von einem Ohr des Benutzers beabstandet sein soll, und einer schalldampfenden Innenposition, die im Gebrauch mit dem Ohr des Benutzers in Berührung stehen soll, beweglich ist, umfaßt.
  2. Helm nach Anspruch 1, dadurch gekennzeichnet, daß sich der Luftkanal (22) von dem Okzipitalbereich erstreckt und am vorderen Teil der Schale (2) in dem oder jedem Auslaß (20) abschließt, der im Gebrauch den oberen Teil des Visiers (30) mit Luft versorgt, wenn dieses sich in seiner ausgezogenen Betriebsposition vor dem Gesicht des Benutzers befindet, so daß die Innenseite des Visiers (30) mit Luft überstrichen wird.
  3. Helm nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mehrere Auslässe (20) für den Luftkanal (22) vorgesehen sind, wobei die Auslässe (20) so ausgerichtet sind, daß sie im Gebrauch die Innenseite des Visiers (30) mit Luft überstreichen und auf die neben dem Gesicht des Benutzers, im Randbereich liegenden Kanten des Visiers (30) zielen, wodurch dort herum eine pneumatische Dichtung bereitgestellt wird, um das Eintreten von Luftschadstoffen auf ein Minimum zu reduzieren.
  4. Helm nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Schale (2) an ihrem hinteren Teil das Außenprofil des Helmes (1) bereitstellt und an ihrem vorderen Teil abgesetzt ist, wobei eine entfernbare Abdeckung (9) in beabstandeter Beziehung zum vorderen Teil vorgesehen ist und so einen Zwischenraum definiert, in den das Visier (30) zurückgezogen werden kann, und die mit dem Helmprofil durchgehend ist.
  5. Helm nach einem der vorhergehenen Ansprüche, dadurch gekennzeichnet, daß sich der Filter (16) quer über den Einlaß (14) des Kanals (22) erstreckt.
  6. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Luftbewegungsmittel (24) in dem Kanal (22) hinter dem Scheitel der Schale und dem Filter (16) nachgeschaltet angeordnet ist.
  7. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Luftbewegungsmittel aus mindestens einem Gebläse (24) besteht.
  8. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Visier (30) einen Träger (32) enthält, an dem ein durchsichtiger Teil lösbar befestigt ist.
  9. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Visier (30) mittels mindestens eines Tragarms (38) verschiebbar an der Innenseite der Schale (2) angebracht ist.
  10. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß jeder Ohrenschützer (60) in seiner inneren Position im Gebrauch den Ohrbereich berühren und dadurch Geräuschdämpfung erreichen soll.
  11. Helm nach Anspruch 10, dadurch gekennzeichnet, daß jeder Ohrenschützer (60) ein Innenteil aufweist, der im Gebrauch den Ohrbereich mechanisch berühren soll.
  12. Helm nach Anspruch 10 oder 11, dadurch gekennzeichnet, daß die Ohrenschützer (60) so ausgeführt sind, daß sie im Gebrauch in ihrer Betriebsposition den Ohrbereich berühren, um das Durchdringen von Schall durch sie hindurch zu verhindern oder zu gestatten.
  13. Helm nach Anspruch 12, dadurch gekennzeichnet, daß auf die Ohrenschützer (60) ausgeübter Druck darin ausgebildete Schallübertragungsdurchgänge öffnet und dadurch das Durchdringen von Schall gestattet.
  14. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der vordere Teil der Schale (2) mit Seitenschutzwangen versehen ist, die im Gebrauch das Visier und die Ohrenschützer (60) ergänzen und so für eine durchgehende Konstruktion um das Gesicht des Benutzers herum sorgen.
  15. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der vordere Teil des Helmes (1) mit einer Halterung (29) für eine Lampe versehen ist.
  16. Helm nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Luftbewegungsmittel (24) batteriebetrieben ist.
EP91311796A 1990-12-20 1991-12-19 Schutzhelm Expired - Lifetime EP0492984B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB909027677A GB9027677D0 (en) 1990-12-20 1990-12-20 Improvements in or relating to powered helmet respirators
GB9027677 1990-12-20
CA002072063A CA2072063A1 (en) 1990-12-20 1992-06-23 Improvements in or relating to protective helmets

Publications (2)

Publication Number Publication Date
EP0492984A1 EP0492984A1 (de) 1992-07-01
EP0492984B1 true EP0492984B1 (de) 1997-05-14

Family

ID=25675259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91311796A Expired - Lifetime EP0492984B1 (de) 1990-12-20 1991-12-19 Schutzhelm

Country Status (7)

Country Link
EP (1) EP0492984B1 (de)
AU (1) AU657503B2 (de)
CA (1) CA2072063A1 (de)
DE (1) DE69126112T2 (de)
ES (1) ES2101729T3 (de)
GB (2) GB9027677D0 (de)
SE (1) SE501653C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7937775B2 (en) 2005-08-09 2011-05-10 Microtek Medical, Inc. Surgical protective head gear assembly including high volume air delivery system

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU668584B2 (en) * 1992-07-31 1996-05-09 Mine Safety Appliances Company Limited Helmet respirator apparatus
GB9516265D0 (en) * 1995-08-08 1995-10-11 Rovira John S Headgear
GB9617516D0 (en) * 1996-08-21 1996-10-02 Univ Brunel Air filtration system
FI981394A (fi) * 1998-06-16 1999-12-17 Kemira Safety Oy Suojainkypärä
CN100358448C (zh) * 2003-07-11 2008-01-02 中国人民解放军总装备部防化军事代表局 正压式防护头罩
WO2017065620A1 (en) * 2015-10-15 2017-04-20 Clear Air Technology Limited A respirator
FR3069759A1 (fr) * 2017-08-03 2019-02-08 Commissariat A L'energie Atomique Et Aux Energies Alternatives Casque d'assainissement d'air pour usage dynamique
EP3718605A1 (de) * 2019-04-04 2020-10-07 Hilti Aktiengesellschaft Vorrichtung zur erzeugung eines luftvorhangs vor einem gesicht eines nutzers
WO2020251372A1 (en) * 2019-06-14 2020-12-17 Peakvent As A head-mounted wearable air-purifying device comprising a motorized rotating filter
WO2021050916A1 (en) 2019-09-12 2021-03-18 O2-O2, Inc. Respirator devices with source control mechanisms and associated systems and methods
CA3199911A1 (en) * 2020-12-03 2022-06-09 Robert Ranson Cranium-covering extension device for a face shield

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1005187A (en) * 1961-03-14 1965-09-22 Ml Aviation Co Ltd Improvements relating to flying helmets
GB1005188A (en) * 1961-03-14 1965-09-22 Ml Aviation Co Ltd Improvements relating to flying helmets
US3178723A (en) * 1963-05-24 1965-04-20 Leonard P Frieder Sound attenuating device and supporting means in a helmet
US3223086A (en) * 1963-08-05 1965-12-14 Arthur R Adams Air-conditioned helmet
US3310811A (en) * 1964-04-07 1967-03-28 Jr Vincent D Iacono Helmet enclosure
US3736927A (en) * 1971-05-17 1973-06-05 F Misaqi Self-contained air purifier and conditioner unit
GB1495020A (en) * 1974-01-16 1977-12-14 Nat Res Dev Respirators
US3906547A (en) * 1974-09-26 1975-09-23 Gentex Corp Headset retainer for helmet
CA1101755A (en) * 1978-02-10 1981-05-26 Canadian Patents And Development Limited Safety helmet for miners
GB2063074B (en) * 1979-10-30 1984-07-25 Martindale Protection Ltd Protective respiratory helmet
GB2061696B (en) * 1979-10-30 1984-05-16 Martindale Protection Ltd Protective respiratory helmet
US4280491A (en) * 1980-03-07 1981-07-28 Minnesota Mining And Manufacturing Company Powered air respirator
DE3220691C2 (de) * 1982-06-02 1985-11-21 HABRA elektronik Gesellschaft mbH, 8000 München Schutzhelm, insbesondere Motorradschutzhelm
FR2629986B1 (fr) * 1988-04-19 1991-01-11 Electricite De France Casque de protection polyvalent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7937775B2 (en) 2005-08-09 2011-05-10 Microtek Medical, Inc. Surgical protective head gear assembly including high volume air delivery system

Also Published As

Publication number Publication date
ES2101729T3 (es) 1997-07-16
GB9027677D0 (en) 1991-02-13
GB2251173B (en) 1995-06-14
DE69126112T2 (de) 1997-10-02
EP0492984A1 (de) 1992-07-01
GB9127008D0 (en) 1992-02-19
SE9201996L (sv) 1993-12-30
GB2251173A (en) 1992-07-01
SE9201996D0 (sv) 1992-06-29
SE501653C2 (sv) 1995-04-10
DE69126112D1 (de) 1997-06-19
CA2072063A1 (en) 1993-12-24
AU8993591A (en) 1992-06-25
AU657503B2 (en) 1995-03-16

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