EP0646333A1 - Dispositif pour fixer un écran facial protecteur et/ou des coupelles de protection des oreilles sur un casque de protection - Google Patents

Dispositif pour fixer un écran facial protecteur et/ou des coupelles de protection des oreilles sur un casque de protection Download PDF

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Publication number
EP0646333A1
EP0646333A1 EP94810556A EP94810556A EP0646333A1 EP 0646333 A1 EP0646333 A1 EP 0646333A1 EP 94810556 A EP94810556 A EP 94810556A EP 94810556 A EP94810556 A EP 94810556A EP 0646333 A1 EP0646333 A1 EP 0646333A1
Authority
EP
European Patent Office
Prior art keywords
bracket plate
claw
bracket
edge
mounting bracket
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
Application number
EP94810556A
Other languages
German (de)
English (en)
Other versions
EP0646333B1 (fr
Inventor
Kurt Herzig
Hugo Herzig
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.)
Artilux Herzig AG
Original Assignee
Artilux Herzig AG
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 Artilux Herzig AG filed Critical Artilux Herzig AG
Publication of EP0646333A1 publication Critical patent/EP0646333A1/fr
Application granted granted Critical
Publication of EP0646333B1 publication Critical patent/EP0646333B1/fr
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

Definitions

  • the invention relates to a fastening system provided on both sides of a protective helmet for the adjustable mounting of a face shield and / or ear muffs according to the preamble of independent patent claim 1.
  • a holder which is fixed on both sides of the protective helmet to the helmet by means of a screw connection which passes through its wall (DE-OS 22 60 311; DE-GM 73 35 724).
  • a disadvantage of this construction is, in addition to the increased manufacturing effort, an often impermissible weakening of the helmet shell as a result of the two through holes, and a privacy screen to be worn would have to be created separately.
  • Clamping parts have also been developed, which are to be fixed on the rim of the helmet, the clamping parts accommodating support brackets for the ear muffs (DE-GM 74 15 619; DE-PS 27 05 348). These clamping parts are relatively simple in their construction, but they are only suitable for holding a support bracket. It is not possible to connect face and hearing protection at the same time.
  • the known fastening devices on working helmets for fixing face and hearing protection elements cannot all be rated as optimal.
  • the invention therefore pursues the objective of creating a fastening system to which both the support bracket for a privacy shield and the retaining bracket for ear muffs can be coupled simultaneously.
  • the head protection elements must be easy and safe to use.
  • the entire protection system should also be usable in the electrical sector.
  • the fastening device must be of a certain robustness and adequately protected against contamination.
  • the structural design must allow cost-effective production. For special applications, where this is sufficient, the fastening system should only allow the inclusion of a face shield or ear muffs with reduced design effort.
  • the fastening system is designed for holding both the face shield and ear muffs.
  • the new fastening system offers considerable advantages compared to the prior art.
  • the use of a protective helmet equipped with this fastening system is advantageous.
  • the relatively small, compact and weight-reduced design as well as the function of the system leads to an optimal contact pressure of the ear muffs when they are folded up to the ears, to an improved foldability - at a distance from the ears - and to the back of the head.
  • the pivotability of the face shield between the two end positions "lowered - shielding the face" and "raised - releasing the face” improves.
  • the structural design of the fastening system enables a balanced mass distribution of the protective devices attached, so that their stable positioning in the respective swivel position is ensured and there are no noticeable changes in load for the helmet wearer.
  • the system has no metal parts, so that a protective helmet fitted with it can also be used for electrical work.
  • the brackets for the ear muffs and the face shield no longer have to be differentiated into left and right parts.
  • the protective helmet is used both with the attached ear muffs and the face shield, for example when working in the forest with chainsaws.
  • the protective device that is not required can be swung away with one hand. Thanks to its capsule-like structure, the fastening system is optimally protected against dirt and manipulation. There is no relative in any way loosely attached parts, for example a tension spring, which could get lost.
  • the protective helmet 1 has, according to FIGS. 1a to 1c, on its lower edge, in the outwardly extending helmet rim 11 on both sides, a vertically extending insertion groove 12 passing through the helmet rim 11, which is surrounded by upstanding webs 13.
  • the insertion grooves 12 are arranged vertically above the ears of a potential helmet wearer.
  • a fastening device 100 is inserted into each of the two insertion grooves 12, specifically with an insertion lug 121 which extends vertically downward from the fastening device 100, the insertion lug 121 penetrating the insertion groove 12 from above and being guided therein.
  • the guidance of the insertion tab 121 in the insertion groove 12 is reinforced by the webs 13 surrounding the insertion groove 12, so that a type of guide sleeve 14 is created.
  • a mounting bracket 110 - the left or the right one - of the face shield 2 and a holding bracket 150 for the respective left or right ear protection shell 3 are fixed to each fastening device 100.
  • the face shield 2 can be lowered ( Figure 1a: full line display) or raised (dashed line).
  • the ear muffs 3 can assume three different positions, folded onto the ears of the wearer (FIGS. 1a and 1b: full line representation), folded down from the ears of the wearer (FIG. 1b: dashed representation) and finally pivoted backwards (FIG.
  • FIGS. 2a and 2b show the bracket plate 120 of the fastening device 100 in view X, that is to say the surface facing the protective helmet 1.
  • the sectional view according to FIG. 2c is intended to illustrate the entire structure of the mounting bracket plate 120.
  • the arm 111 of the bracket 110 is lowered, while the arm 111 in Figure 2b is raised.
  • the one-piece mounting bracket plate 120 is approximately oval in shape and extends downward as an insertion flap 121 with the parallel side flanks 124.
  • the insertion flap 121 is dimensioned such that the plug connection between the insertion flap 121 and the guide sleeve 14 securely fixes the fastening device 100 to the protective helmet 1 guaranteed, but also an occasional pulling out of the insertion tab 121 from the guide sleeve 14 with a certain amount of force is possible.
  • a support edge 122 is placed in segments, for example over an arc dimension of 90 °, which ends with the outer flank 125 of the bracket plate 120, the support edge 122 being offset from the apex line 132 of the bracket plate 120 extends approximately the same distance in both directions. This support edge 122 has two functions.
  • the uppermost area of the bracket plate 120 thickening support edge 122 compensates for the surface curvature of the protective helmet 1 leading away from the vertically inserted fastening device 100.
  • the support edge 122 causes the fastening device 100 to bear against the protective helmet without play.
  • One of the cross-sectional areas of the support edge 122 namely that which faces the transition between the arm 111 and the claw 112 of the support bracket 110, serves as a stop 123 when the support bracket 110 is raised.
  • the coupling cam 126 has at least the height which corresponds to the material thickness of the claw 112, the material thickness of the entire support bracket 110 being determined according to the strength requirement and the space conditions.
  • a retaining disk 127 sits on the coupling cam 126 in a cover-like manner; the coupling cam 126 and the holding disk 127 can expediently form a seamless part.
  • the holding disk 127 has the task of preventing the claw 112 and thus the entire support bracket 110 from sliding off the coupling cam 126 and perpendicularly from the support bracket plate 120.
  • the coupling cam 126 and the inner contour 113 - here an internal hexagon - of the claw 112 have an approximately complementary geometry.
  • the claw 112 is designed like an open-ended wrench, the jaw opening 114 in the local variant extending downward.
  • the claw 112 also has a groove-shaped elasticity cutout 115. This passes through the material thickness of the claw 112 and partially extends approximately from the transition between the claw 112 and the arm 111 into the arcuate course of the claw 112.
  • the elasticity cutout 115 has the function of being plugged in and removed of the support bracket 110, more precisely the claw 112 on the coupling cams 126, and when adjusting the attached support bracket 110, the jaw opening 114 tends to widen and the operations are thus facilitated.
  • the coupling cams 126 and the inner contour 113 are dimensioned with respect to one another in such a way that a tight fit results. Corners and flanks of the inner contour 113 of the claw 112 press against the corresponding corners and flanks of the coupling cam 126.
  • the support bracket 110 is moved from the lowered to the raised position or vice versa, the claw 112 is partially rotated around the fixed coupling cam 126 the rotation, the jaw opening 114 and the claw 112 as such are slightly spread apart by the coupling cam 126 until there is a next latching position between the inner contour 113 and the coupling cam 126 as the rotary motion continues.
  • the spreading and contraction of the claw 112 is significantly promoted by the elasticity cutout 115.
  • the bracket plate 120 from the view Y that is to say the surface facing away from the protective helmet 1 likewise has special design features.
  • a pin 128 with a locking lug 129 and a base thickening 130 rises from the center of the mounting bracket plate 120, opposite the coupling cam 126 and extending into the interior of the fastening device 100.
  • the fastening device 100 is supported on the seat edge 131 when it is inserted into the guide sleeve 14. If the shape of the protective helmet 1 permits this, the seat edge 131 could also be formed on the side of the X view.
  • the entire bracket plate 120 with the insertion flap 121 and the components described on the view sides X and Y is advantageously used as a one-piece molded plastic part, e.g. Injection molding process.
  • the mounting device 100 also includes the mounting bracket plate 140 which is arranged between the mounting bracket plate 120 described above and the cover 160.
  • the mounting bracket plate 140 is pushed onto the mounting bracket plate 120 in the completed state of the mounting device 100, the pin 128 passing through the center of the bottom 141 of the mounting bracket Retaining bracket plate 140 located through hole 142 protrudes and the base thickening 130 of the pin 128 sits positively in the through hole 142.
  • In the bottom 141 of the bracket plate 140 there is - from the view side X - a recess which is complementary to the seat edge 131 of the bracket plate 120, so that the entire bottom 141 is in a form-fitting manner against the bracket plate 120.
  • the outer flank 125 and the apex line 132 there is congruence between the mounting bracket plate 120 and the mounting bracket plate 140, the mounting bracket plate 140 being flush with the seat edge 131.
  • the holding bracket plate 140 has further arrangement features.
  • An almost completely circumferential side wall 143 rises from the edge of the bottom 141 and has an opening 144 only for the retaining bracket 150 which extends from below into the retaining bracket plate 140, as a result of which the retaining bracket 150 is guided laterally.
  • a positioning and sealing groove 146 runs around on the upper edge 145 of the side wall 143.
  • the side wall 143 has a wall reinforcement 147, since the axis of rotation 151 of the holding bracket 150 is embedded therein.
  • the holding bracket 150 is suspended from the horizontally running axis of rotation 151 and can be pivoted about this between the two positions - folded or folded position.
  • a spring bar 148 with a nose profile 149 at its tip rises from the bottom 141, below the through hole 142, up to approximately the upper edge 145 of the side wall 143. It is also conceivable that the spring bar 148 does not stand up from the bottom 141, but rather such a spring bar 148 projects as a tongue from the side wall 143 or spans between the circumferential side wall 143.
  • claw 152 bent in the direction of the attached cover 160 and forming an end piece of the holding bracket 150.
  • the claw 152 has a horizontally running sliding surface 153 on its foremost flank, which is formed by two rounded switching edges 154, 155 is limited.
  • a domed cover 160 is placed on the retaining bracket plate 140, which has a cover edge 161 that fits the upper edge 145 and the positioning and sealing groove 146 therein, with a correspondingly protruding sealing nose 162.
  • the lid 160 also has a notch 163 in the lower edge region, which reaches the other retaining bracket 150 via the attachment of the claw 152, so that the retaining bracket 150 is not hindered by the lid 160 when pivoting into the folded-down position.
  • a through hole 164 with an external countersink 165 is also provided in the center of the cover 160.
  • the lid edge 161 lies on the upper edge 145 of the bracket plate 140; the sealing lug 162 engages in the positioning and sealing groove 146.
  • the tip of the pin 128 with the locking lug 129 located at the front must squeeze through the through-hole 164 in the cover 160, finally engages in the countersink 165 and thus pulls the cover 160 towards itself, as a result of which the bracket plate 140 is also pressed onto the bracket plate 120 and thus the assembly of the fastening device 100 is formed.
  • This construction can be useful when it is necessary to prevent the fastening device 100 from being opened without authorization. If the risk of contamination is low, it is also possible to provide only webs for supporting the cover 160 instead of a circumferential closed side wall 143. It is also conceivable to dispense with the side wall 143 and to continue the cover edge 161 so that in this way a cavity for the claw 152 and the spring bar 148 is formed between the base 141 and the cover 160.
  • the bracket plate 140 and the lid 160 are advantageously made as one-piece molded plastic parts, e.g. manufactured by injection molding; the same applies to the support bracket 110 and the bracket 150.
  • This position means that the holding bracket 150 extends approximately vertically downward from the fastening device 100. Furthermore, the spring bar 148 is bent somewhat upward from its rest position by a contact flank 156 on the claw 152, which lies behind the switching edge 154 from the sliding surface 153 and which presses against the underside of the bulbous nose profile 149. Viewed vertically, the contact flank 156 lies by the bevels on the claw 152 a shade lower than the switching edge 154 forming a ridge line in this position. When this position is set, the underside of the nose profile 149 has jumped over the switching edge 154. It was a maximum Deflection of the spring bar 148 and thus also exceeded a peak value of spring force, so that the bracket 150 remains in this position.
  • the bracket 150 strikes the stop with a stop surface 157 when this position is reached Edge of the bottom 141.
  • the pressure force of the hearing protection cup 3 against the wearer's ear is approximately constant within the possible anatomical ranges of pairs of ears and is dimensioned according to standard requirements.
  • This setting position means that the holding bracket 150 protrudes obliquely from the fastening device 100. From the folded position, the holding bracket was moved outward in a swiveling motion with a certain amount of force. The spring bar 148 lifts a little more and the spring force increases because the switching edge 154 is higher than the contact flank 156. If the adjustment is made further, the nose profile 149 moves onto the sliding surface 153. As this is viewed on the y coordinate below the switching edge 154 lies, the spring bar 148 jumps in the direction of it Rest position.
  • the spring bar 148 is deflected upward again, since the claw 152 adjusts the lever arm from the axis of rotation 151 to the underside of the nose profile 149, as a result of which the spring bar is forcibly pushed further upwards.
  • the maximum deflection and spring force reach the nose profile 149 when the switching edge 155 passes the underside of the nose profile 149.
  • the nose profile 149 jumps behind the sliding surface 153 which has been passed through and the switching edge 155 which has just passed, the spring bar 148 also dropping suddenly.
  • the switching edge 155 lies on the x-coordinate viewed to the left of the nose profile 149 and the retaining bracket 150 remains in this position. Only when pivoting the bracket 150 to the left and overcoming the friction between the claw 152 and the nose profile 149 and overcoming the peak deflection and spring force of the spring bar 148 is it possible to return to the folded position.
  • the face shield 2 and the ear muffs 3 are put on and taken off by inserting or pulling out the two fastening devices 100 into or out of the protective helmet 1 with the pairs of carrying brackets 110 and retaining brackets 150 already attached to the fastening devices 100, on which the face shield 2 or the ear muffs 3 are attached. There is therefore no need to provide an excessively easy application and removal of the face shield 2 and the ear muffs 3, which are attached to the carrying brackets 110 and the holding brackets 150, directly to or from the fastening devices 100.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Helmets And Other Head Coverings (AREA)
EP94810556A 1993-09-30 1994-09-26 Dispositif pour fixer un écran facial protecteur et/ou des coupelles de protection des oreilles sur un casque de protection Expired - Lifetime EP0646333B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH294293 1993-09-30
CH2942/93 1993-09-30

Publications (2)

Publication Number Publication Date
EP0646333A1 true EP0646333A1 (fr) 1995-04-05
EP0646333B1 EP0646333B1 (fr) 1998-07-08

Family

ID=4245102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810556A Expired - Lifetime EP0646333B1 (fr) 1993-09-30 1994-09-26 Dispositif pour fixer un écran facial protecteur et/ou des coupelles de protection des oreilles sur un casque de protection

Country Status (5)

Country Link
US (1) US5546610A (fr)
EP (1) EP0646333B1 (fr)
CA (1) CA2133016A1 (fr)
DE (1) DE59406401D1 (fr)
NO (1) NO943619L (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1472944A2 (fr) * 2003-05-02 2004-11-03 Jose Maria Rolla Dispositif de protection auditive pour casque et casque muni d'un tel dispositif de protection auditive
WO2008025460A1 (fr) * 2006-08-30 2008-03-06 Andreas Stihl Ag & Co. Kg Système combiné de protection de la tête
US8059851B2 (en) 2004-08-19 2011-11-15 Anton Pfanner Hearing protection and/or loudspeaker element
GB2625743A (en) * 2022-12-22 2024-07-03 Jsp Ltd Earmuff mounting device

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US6041435A (en) * 1998-02-12 2000-03-28 Paulson Manufacturing Corporation Dielectric hat bracket for safety hats
US6318369B1 (en) * 1998-03-05 2001-11-20 Kenneth M. Gregory Eye ear and respiration protection apparatus
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US20040181856A1 (en) * 2003-03-19 2004-09-23 Oleson Richard Alan Protective helmet with a system allowing for attachment of interchangeable accessories
US7020901B2 (en) * 2003-07-21 2006-04-04 Brhel Joseph A Eye and ear protection apparatus
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US9072328B2 (en) * 2005-06-17 2015-07-07 Artisent, Llc Hinged attachment of headgear to a helmet
US20070044206A1 (en) * 2005-08-29 2007-03-01 Sato Luciana M Hearing protective earmuff device having frictionally engageable ear cups
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USD750846S1 (en) 2006-02-09 2016-03-01 Artisent, Llc Helmet mounted rail
US9474319B2 (en) * 2007-10-10 2016-10-25 3M Innovative Properties Company Pivoting headgear system
US8214920B1 (en) * 2008-02-18 2012-07-10 Sperian Eye & Face Protection, Inc. Hard hat adapter for a welding helmet
JP5502086B2 (ja) * 2008-08-25 2014-05-28 ラウド・アンド・クリア・セイフティ・ピーティーワイ・リミテッド 保護装置
JP4880059B1 (ja) * 2010-09-24 2012-02-22 西日本高速道路メンテナンス関西株式会社 ヘルメット用ヘッドホン及び該ヘッドホンを有するヘルメット
CN103313616B (zh) * 2011-04-01 2016-01-13 Msa技术有限公司 头盔附件接头
KR101289968B1 (ko) 2012-04-12 2013-07-26 한전케이피에스 주식회사 작업용 안전모
US9339075B2 (en) * 2013-08-09 2016-05-17 Larry D. Ratliff Cap hearing protection system
US10617168B2 (en) * 2014-01-14 2020-04-14 Gentex Corporation Pivot-arm assembly for a helmet mounted headset
US10959477B2 (en) * 2014-05-02 2021-03-30 3M Innovative Properties Company Ear muff attachment having dual axis of rotation
USD741550S1 (en) 2014-05-02 2015-10-20 3M Innovative Properties Company Ear muff attachment arm
EP3340643A1 (fr) * 2016-12-21 2018-06-27 Safariland, LLC Connecteur de rail pour ensemble de suspension d'oreillette
US10582736B2 (en) * 2017-01-16 2020-03-10 Safariland, Llc Wireform attachment mechanism
USD876017S1 (en) * 2017-05-10 2020-02-18 3M Innovative Properties Company Attachment arm
EP3459377A1 (fr) * 2017-09-22 2019-03-27 3M Innovative Properties Company Casque de soudage
US10928163B2 (en) * 2017-10-04 2021-02-23 Trent Zimmer Ballistic helmet
DE102018107957B3 (de) * 2018-04-04 2019-08-14 Pfanner Schutzbekleidung Gmbh Gehörschutz mit Brille
US10912344B2 (en) * 2018-12-03 2021-02-09 Msa Technology, Llc Helmet with accessory attachment rail
EP3968805A1 (fr) * 2019-05-16 2022-03-23 Locatelli S.p.A. Casque de protection
US11213089B2 (en) 2019-06-04 2022-01-04 Msa Technology, Llc Protective helmet with face protection shield and linkage mechanism
CA3085700C (fr) 2020-05-01 2022-06-07 Bauer Hockey Ltd. Casque protecteur avec barriere contre les infectants
CN111637855A (zh) * 2020-06-08 2020-09-08 杭州负瑞科技有限公司 一种棒球帽制作用修眉夹持检测设备
JP1727662S (ja) 2021-11-23 2022-10-18 空気清浄機用フィルター
JP1728464S (ja) 2021-11-23 2022-10-27 情報表示用画像
JP1728465S (ja) 2021-11-23 2022-10-27 情報表示用画像
JP1726922S (ja) 2021-11-23 2022-10-07 空気清浄機
JP1728467S (ja) 2021-11-23 2022-10-27 情報表示用画像

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DE2719503A1 (de) * 1977-05-02 1978-11-09 Weltin Optac Lagerkopf mit schwenkbuegel
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GB2050148A (en) * 1979-05-28 1981-01-07 Loennstedt B G Fastening means for fitting an accessory especially an ear muff to a safety helmet
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EP0532483A1 (fr) * 1991-09-11 1993-03-17 Peltor Ab Aménagement pour une visière positionnable

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Publication number Priority date Publication date Assignee Title
FR2338005A1 (fr) * 1976-01-19 1977-08-12 Karsenti Christian Ensemble visiere-monture pour casque de motocycliste
DE2719503A1 (de) * 1977-05-02 1978-11-09 Weltin Optac Lagerkopf mit schwenkbuegel
US4124902A (en) * 1977-10-31 1978-11-14 Mine Safety Appliances Company Mounting assembly connecting a face shield to a safety hat
GB2015868A (en) * 1978-03-07 1979-09-19 Hellberg Protection Ab Mounting a face shield on a protective helmet
GB2050148A (en) * 1979-05-28 1981-01-07 Loennstedt B G Fastening means for fitting an accessory especially an ear muff to a safety helmet
US4305160A (en) * 1980-02-19 1981-12-15 Bell Helmets, Inc. Detent controlled helmet shields
WO1986003656A1 (fr) * 1984-12-19 1986-07-03 Loennstedt Bo Gunnar Charniere pour la visiere escamotable d'un casque de protection
EP0532483A1 (fr) * 1991-09-11 1993-03-17 Peltor Ab Aménagement pour une visière positionnable

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1472944A2 (fr) * 2003-05-02 2004-11-03 Jose Maria Rolla Dispositif de protection auditive pour casque et casque muni d'un tel dispositif de protection auditive
EP1472944A3 (fr) * 2003-05-02 2006-09-20 Jose Maria Rolla Dispositif de protection auditive pour casque et casque muni d'un tel dispositif de protection auditive
US8059851B2 (en) 2004-08-19 2011-11-15 Anton Pfanner Hearing protection and/or loudspeaker element
WO2008025460A1 (fr) * 2006-08-30 2008-03-06 Andreas Stihl Ag & Co. Kg Système combiné de protection de la tête
US8166575B2 (en) 2006-08-30 2012-05-01 Andreas Stihl Ag & Co. Kg Protective headgear with a visor and ear muff
CN101795589B (zh) * 2006-08-30 2013-07-17 安德烈亚斯.斯蒂尔两合公司 组合头部防护装置
GB2625743A (en) * 2022-12-22 2024-07-03 Jsp Ltd Earmuff mounting device

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NO943619L (no) 1995-03-31
DE59406401D1 (de) 1998-08-13
CA2133016A1 (fr) 1995-03-31
US5546610A (en) 1996-08-20
EP0646333B1 (fr) 1998-07-08
NO943619D0 (no) 1994-09-29

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