EP0814678B1 - Schutzhelm - Google Patents

Schutzhelm Download PDF

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Publication number
EP0814678B1
EP0814678B1 EP96905950A EP96905950A EP0814678B1 EP 0814678 B1 EP0814678 B1 EP 0814678B1 EP 96905950 A EP96905950 A EP 96905950A EP 96905950 A EP96905950 A EP 96905950A EP 0814678 B1 EP0814678 B1 EP 0814678B1
Authority
EP
European Patent Office
Prior art keywords
helmet
side walls
visor
filter unit
shell
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
EP96905950A
Other languages
English (en)
French (fr)
Other versions
EP0814678A1 (de
Inventor
Colin Andrew Paton
Jacques William Forrest
Lee George Bulbrook
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.)
Centurion Safety Products Ltd
Original Assignee
Centurion Safety 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 Centurion Safety Products Ltd filed Critical Centurion Safety Products Ltd
Publication of EP0814678A1 publication Critical patent/EP0814678A1/de
Application granted granted Critical
Publication of EP0814678B1 publication Critical patent/EP0814678B1/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
    • A42B3/18—Face protection devices
    • A42B3/22—Visors
    • A42B3/225—Visors with full face protection, e.g. for industrial safety applications
    • 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
    • A42B3/28—Ventilating arrangements
    • 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
    • A42B3/281—Air ducting systems
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/32—Collapsible helmets; Helmets made of separable parts ; Helmets with movable parts, e.g. adjustable
    • 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 relates to a helmet filter unit for protective helmets used by operatives in industrial environments, e.g. in the mining or quarrying industries.
  • the invention also relates to a protective helmet provided with such a filter unit.
  • a known protective helmet disclosed in US-A-5283914, is provided with a retractable visor, a fan for providing filtered airflow through ducting within the shell to regions in front of the wearer's face and ear defenders movably mounted at each side of the helmet.
  • the present invention seeks to provide improvements to the known designs of filter units for protective helmets.
  • a helmet filter unit as claimed in the ensuing claim 1.
  • Figures 1 and 2 show a known protective helmet 1, of the type shown in US-A-5283914, in the form of a powered respirator helmet in position on a wearer's head 3, the helmet 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 helmet 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 is clipped into a holder 13 and can be easily removed and replaced.
  • a further inner skin which comprises part 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, 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.
  • 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 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 a lowered position 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 50 on the sides of the shell 2 gives panoramic protection for the front and sides of the wearer's face.
  • FIGS 3 to 7 show a protective helmet 60 which is similar in many respects to the known helmet 1 shown in Figure 1 and 2. In the following description the main differences between the helmets 1 and 60 will be described.
  • the helmet 60 has a main chassis-like circumferential plastics support 61 which carries or mounts the main parts of the helmet 60.
  • a protective shell 62 is mounted, e.g. adhered, in an upwardly open socket portion 61c of the support 61.
  • a flexible ducting member 63 positioned inside, and spaced from, the shell 62 connects a rear portion 61a of the support to a front portion 61b of the support.
  • the ducting member 63 has a single main inlet chamber 64 connected to an air inlet cavity 65 formed in the rear portion 61a and four outlet ducts 66 (only one of which is shown in Figure 4) connected to a plurality of air outlets 67, 68 in the front portion 61b.
  • the inlet chamber 64 opens into two intermediate ducts 69, in each of which an electric fan 70 is received, and each intermediate duct 69 branches into two of said outlet ducts 66.
  • a removable air filter unit 71 is received in an interference fit in the air inlet cavity 65 and comprises an elongate, e.g. curved or arcuate, channel section plastics support 72 having a base 72a with apertures 72b therein, flanged spaced apart side walls 72c and 72d and flanged end walls 72e and 72f.
  • a pocket-like flexible, cloth- or fabric-like filter medium 73 is carried by the support 72, with the open mouth-like end of the pocket-like filter medium being attached, e.g.
  • the filter medium is thus positioned across the air inlets provided by the apertures 72b and defined between the side walls of the support.
  • parts of the flexible filter medium 73 are sandwiched between the walls of the air inlet cavity 65 and the side and end walls of the plastics support 72.
  • the spaced apart side walls of the support 72 can be resiliently urged slightly towards each other and, when the filter 71 is in position, these side walls may be slightly resiliently compressed towards each other by the walls of the air inlet 65 so that the sandwiched filter medium is resiliently urged or pressed into air sealing contact with the walls of the air inlet 65 whilst at the same time retaining the air filter in position in an interference fit within the air inlet cavity.
  • the support is of channel-section
  • the apertured base 72a could be dispensed with provided that the side walls of the support are sufficiently rigid to remain spaced apart and provide an air inlet passage between the side walls.
  • a harness arrangement is detachably carried by the support 61 and is positioned inwardly of the ducting member 63.
  • the harness comprises a plastics headband, adjustable to suit the wearer's head size, and webbing attached thereto which in use is intended to sit on the crown of the wearer's head.
  • the harness has a number of connecting members (not shown) for detachable connection to a number of connection sockets 76 on the support 61.
  • a bulbous, e.g. part-spherical, visor 80 is movable from a lowered position (shown in Figures 3 and 4) in front of a wearer's face to a raised position (not shown) retracted within the helmet.
  • the visor 80 is movably guided by guide members 81 carried by the support 61 at each side of the helmet immediately above ear defenders 90 and 91 (to be described in greater detail hereafter).
  • Each guide member has a curved, e.g. arcuate, slot 82 and bushes 83 and 84, connected to wing portions of the visor, are slidably received in this slot 82 during movement of the visor between it raised and lowered positions.
  • the visor 80 is moved inside the shell 62 in the space between the shell and the ducting member 63.
  • the harness 75 is not carried by the shell 62 but instead is carried by the support 61.
  • the harness 75 does not interfere with the visor during movement of the latter between its raised and lowered positions.
  • a light mounting is provided for detachably mounting a lamp (not shown) to the helmet.
  • a belt-carried battery pack with a length of cable is connected to the lamp and, when the lamp is fitted to the helmet, the cable is clipped to the helmet by a cable clamp 86.
  • Various electrical leads are shown in Figure 4 extending between the light mounting 85, the electric fans 70 and a switch 87 mounted to one of the guide members 81.
  • the switch 86 has a switch arm 88 moved by the bush 84 for controlling operation of the fans 70 and the helmet-mounted lamp which are designed to be turned on as the visor is moved into its lowered position and to be turned off as the visor is moved upwardly out of its lowered position.
  • the position of the arm 88 after the visor 80 has been raised from its lowered position is shown in dashed lines in Figure 4.
  • the ear defenders 90 and 91 are mounted at each side of the helmet for movement between an outer position (see ear defender 90) and an inner position (see ear defender 91). Since both ear defenders and their mounting to the helmet are similar, only one ear defender 90 and its mounting will be described in detail hereinafter.
  • the ear defender 90 comprises a hollow plastics casing 92 (see Figure 6) in which sound absorbing material 93, e.g. plastics foam material, is received.
  • a flexible resilient pad 94 intended to be pressed against a wearer's head around the ear is fixed to the front of the ear defender about an opening 95 in the casing 92.
  • the ear defender 90 is mounted to the helmet by a pair of wire supports 96 and 97 each having axially aligned opposite end portions 96a and 96b (97a and 97b) and an offset portion 96c (97c) between its end portions.
  • Each offset portion 96c, 97c has an inwardly turned connecting portion 96d, 97d, respectively.
  • the end portions of the wire supports 96 and 97 are pivotally received in rear and front socket members 98 and 99, respectively.
  • the front socket member 99 is carried by a downwardly extending portion 100 of the support 61 and the rear socket member 98 is carried by a bracket 101 depending downwardly from the support 61.
  • Each socket member 98, 99 has upper and lower sockets, the two upper sockets being axially aligned and receiving the end portions 96a and 96b of the wire support 96 and the two lower sockets being axially aligned and receiving the end portions 97a and 97b of the wire support 97. In this manner the two wire supports are pivotally movable about parallel axes defined by the aligned end portions 96a and 96b and the aligned end portions 97a and 97b.
  • each spring clip is preferably a metallic spring clip which has a mounting portion 108 received between two upwardly and inwardly open slots formed in the casing 92 and which is releasably locked in position by a stud on the casing which enters a locating hole in the mounting portion 108 and a spring portion 109 positioned outside the offset portion 96c (97c) of the wire support.
  • the portions 96d and 97d and the sockets 104 and 105 are aligned on an axis 106.
  • the offset portions 96c and 97c of the wire supports are not coplanar but are disposed in planes at an angle, e.g. of about 125°, to each other.
  • the ear defender 90 can be moved inwards from its outer position by manually pushing a gripping member 110 of the ear defender in the direction A (see Figure 3) so that the wire supports 96 and 97 pivot in opposite directions and the offset positions 96c and 97c are moved towards "dead centre" positions in which they occupy a plane containing the pivot axes of the two wire supports.
  • the inwardly turned portions 96d and 97d move outwardly in the sockets 104 and 105, respectively, and resiliently urge the spring portions 109 of the spring clips 106 and 107 outwardly.
  • the spring clips 106 and 107 thus provide a resilient force acting to resist movement of the ear defender 90 in the direction A.
  • the offset portions move through their "dead centre" positions, in which the inwardly turned portions 96d and 97d are at a maximum spacing from each other, the inwardly turned portions move back towards each other within the sockets 104 and 105.
  • the resilient or spring force provided by the spring clips 106 and 107 now assists inward movement of the ear defender towards an innermost position of the latter.
  • the flexible resilient pad 94 contacts the wearer's head before the ear defender reaches its innermost position so that the spring clips 106, 107 provide a resilient pressing force pushing the ear defender against the wearer's head around the ear of the wearer's head.
  • the offset portions 96e and 97e are disposed at an angle of typically about 150° to each other, as opposed to an angle of about 135° when the ear defender is in its innermost position (e.g. when its inward movement is not limited by contacting a wearer's head) .
  • the ear defender 90 can be moved back to its outer position by pulling the gripping member 110 against the resilient force provided by the spring clips 106, 107 so that the wire supports 96, 97 pivot in opposite directions.
  • the resilient force of the spring clips urge the ear defender 90 back to its outer position.
  • the ear defender 90 moves into or towards its inner or outer positions with a "snap action" as the offset portions move through their dead centre positions.
  • the ear defender 90 is able to pivot slightly about the axis 106 and about the pivot axes of the wire supports so as to provide a "floating" mounting. This enables the ear defender 90 to orientate itself properly against a wearer's head in use.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Otolaryngology (AREA)
  • Pulmonology (AREA)
  • Acoustics & Sound (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Gyroscopes (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Lubricants (AREA)

Claims (10)

  1. Helmfiltereinsatz (71), der zur Aufnahme in einem Lufteinlaßhohlraum (65) eines Helmes, der durch Hohlraumseitenwände definiert wird, bestimmt ist, wobei der Filtereinsatz (71) einen Stützrahmen (72) umfaßt, der Rahmenseitenwände (72c - 72f) aufweist und mindestens einen Lufteinlaß (72b) definiert, und sich flexibles Filtermaterial (73) quer über den Lufteinlaß bzw. die Lufteinlässe (72b) erstreckt, um durch den Lufteinlaß bzw. die Lufteinlässe einströmende Luft zu filtern, dadurch gekennzeichnet, daß das Filtermaterial (73) an den Außenflächen der Rahmenseitenwände befestigt ist und daß der Filtereinsatz (71) im Gebrauch in einer Preßpassung in dem Lufteinlaßhohlraum (65) aufgenommen werden soll, wobei dazwischen Filtermaterial (75) so angeordnet wird, daß zwischen den Hohlraumseitenwänden und den Rahmenseitenwänden (72c - 72f) ein Luftabschluß gebildet wird.
  2. Helmfiltereinsatz nach Anspruch 1, dadurch gekennzeichnet, daß die Rahmenseitenwände angeflanscht sind.
  3. Helmfiltereinsatz nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Stützrahmen eine längliche, zum Beispiel bogenförmige oder gekrümmte, Form mit allgemeinem U-Profil, aufweist, wobei die Rahmenseitenwände voneinander beabstandete, zum Beispiel bogenförmige, Seiten und gegenüberliegende Enden bereitstellen.
  4. Helmfiltereinsatz nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Stützrahmen eine mit Öffnungen versehene untere Wand aufweist.
  5. Helmfiltereinsatz nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Seitenwände elastisch zueinander biegbar sind.
  6. Schutzhelm, der einen Lufteinlaßhohlraum aufweist, der durch Hohlraumseitenwände definiert wird, und mit einem abnehmbaren Luftfiltereinsatz nach einem der Ansprüche 1 bis 5 versehen ist, wobei das flexible Filtermaterial so zwischen den Hohlraumseitenwänden und den Rahmenseitenwänden angeordnet ist, daß zwischen diesen Wänden ein Luftabschluß bereitgestellt wird.
  7. Schutzhelm (60) nach Anspruch 6 mit einem Stützmittel an jeder Seite des Helmes und Ohrenschützern (90), die von dem Stützmittel getragen werden und zwischen einer Innen- und Außenposition beweglich sind, wobei jedes Stützmittel ein Paar Drahtstützen (96, 97) umfaßt, die um voneinander beabstandete, parallele Schwenkachsen schwenkbar sind und jeweils zwischen ihren Enden (96a, 97a) einen versetzten Teil (96c, 97c) aufweisen, wobei jeder Ohrenschützer (90) zwischen den versetzten Teilen des dazugehörigen Paars Drahtstützen getragen wird, wobei sich die versetzten Teile (96c, 97c) während der Bewegung des Ohrenschützers (90) aus der Innen- in die Außenposition oder umgekehrt durch Totpunktpositionen bewegen, während die Drahtstützen (96, 97) in entgegengesetzte Richtungen um ihre jeweilige Schwenkachse schwenken, und wobei das Stützmittel weiterhin ein elastisches Mittel (106, 107), z.B. Federklemmen, umfaßt, das auf die versetzten Teile (96c, 97c) jedes Paares Drahtstützen (96, 97) einwirkt, um den dazugehörigen Ohrenschützer (90) aus den Totpunktpositionen entweder in die Innen- oder die Außenposition zu drängen.
  8. Schutzhelm (60) nach Anspruch 7, dadurch gekennzeichnet, daß sich die versetzten Teile (96c, 97c) in ihrer Totpunktposition in einem maximalen Abstand voneinander befinden, der größer ist als der Abstand der Schwenkachsen der Drahtstützen.
  9. Schutzhelm nach einem der Ansprüche 6 bis 8, weiterhin mit einer Schale (62), einem Gurt (75) zum Stützen des Helms auf den Kopf des Benutzers und einer Umfangsstütze (61), auf der die Schale (62) angebracht ist und die den Gurt (75) so trägt, daß er von der Innenseite der Schale beabstandet ist.
  10. Schutzhelm nach Anspruch 9, dadurch gekennzeichnet, daß er weiterhin ein einziehbares Visier (80) und ein von der Umfangsstütze (61) getragenes Visierbefestigungsmittel (81) umfaßt, wobei das Visier (80) bei seiner Bewegung zwischen seiner abgesenkten und angehobenen Position zwischen dem Gurt (75) und der Schale (62) bewegt werden kann.
EP96905950A 1995-03-17 1996-03-11 Schutzhelm Expired - Lifetime EP0814678B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9505439A GB2298778B (en) 1995-03-17 1995-03-17 Improvements in protective helmets
GB9505439 1995-03-17
PCT/GB1996/000563 WO1996028987A1 (en) 1995-03-17 1996-03-11 Improvements in protective helmets

Publications (2)

Publication Number Publication Date
EP0814678A1 EP0814678A1 (de) 1998-01-07
EP0814678B1 true EP0814678B1 (de) 1999-08-04

Family

ID=10771395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96905950A Expired - Lifetime EP0814678B1 (de) 1995-03-17 1996-03-11 Schutzhelm

Country Status (8)

Country Link
EP (1) EP0814678B1 (de)
AT (1) ATE182755T1 (de)
AU (1) AU4950696A (de)
DE (1) DE69603585T2 (de)
ES (1) ES2135878T3 (de)
GB (1) GB2298778B (de)
WO (1) WO1996028987A1 (de)
ZA (1) ZA962027B (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019606A1 (en) * 1995-11-30 1997-06-05 David Winstone Aitken Bennett A safety helmet and method of manufacture
GB9600022D0 (en) * 1996-01-03 1996-03-06 Thetford Moulded Prod Ltd Improvements in or relating to helmets
GB9617516D0 (en) * 1996-08-21 1996-10-02 Univ Brunel Air filtration system
IL151995A0 (en) * 2002-09-29 2004-03-28 Axystems Ltd Axystems Ltd Apparatus for the reception of acoustic communication
PL2271229T3 (pl) 2008-04-04 2018-11-30 3M Innovative Properties Company Uszczelnienie szybki dla nakrycia głowy
KR20130040860A (ko) * 2010-04-06 2013-04-24 쓰리엠 이노베이티브 프로퍼티즈 컴파니 이중 플리넘 시스템을 갖는 헬멧-장착형 호흡기 기구
WO2011160157A1 (en) * 2010-06-21 2011-12-29 Jorge Miguel Pereira Ear muffs
USD741550S1 (en) 2014-05-02 2015-10-20 3M Innovative Properties Company Ear muff attachment arm
USD881380S1 (en) 2017-10-16 2020-04-14 Gentex Corporation Respirator

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047237A (de) *
US3091771A (en) * 1961-10-16 1963-06-04 Mine Safety Appliances Co Ear cup assembly for helmets
US3310811A (en) * 1964-04-07 1967-03-28 Jr Vincent D Iacono Helmet enclosure
US3543308A (en) * 1966-12-19 1970-12-01 Sierra Eng Co Visor
US4103359A (en) * 1977-02-28 1978-08-01 Arcair Company Noise suppressing welding helmet
SE406548B (sv) * 1977-07-01 1979-02-19 Palmaer Tore Georg Horselskyddhallare
GB2063074B (en) * 1979-10-30 1984-07-25 Martindale Protection Ltd Protective respiratory helmet
SE433906B (sv) * 1980-06-23 1984-06-25 Gullfiber Ab Festanordning for montering av en horselskyddskapa pa en hjelm
SE434696B (sv) * 1982-12-03 1984-08-13 Tore Palmaer Legesfixeringsanordning for tillbehor pa exempelvis skyddshjelm
US4516274A (en) * 1984-01-26 1985-05-14 The United States Of America As Represented By The Secretary Of The Army Adjustable earcup retention harness
CA2045241C (en) * 1990-07-13 1997-03-25 Lawrence H. Zuckerman Combination head-protective helmet with local and remote voice triggered communication system
US5283914A (en) * 1990-12-20 1994-02-08 Coal Industry (Patents) Limited Protective helmets

Also Published As

Publication number Publication date
ATE182755T1 (de) 1999-08-15
GB9505439D0 (en) 1995-05-03
DE69603585D1 (de) 1999-09-09
EP0814678A1 (de) 1998-01-07
WO1996028987A1 (en) 1996-09-26
ES2135878T3 (es) 1999-11-01
GB2298778A (en) 1996-09-18
AU4950696A (en) 1996-10-08
ZA962027B (en) 1996-09-26
DE69603585T2 (de) 2000-01-13
GB2298778B (en) 1998-04-22

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