EP0131929B1 - Safety helmet for motor cyclists - Google Patents

Safety helmet for motor cyclists Download PDF

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Publication number
EP0131929B1
EP0131929B1 EP84108236A EP84108236A EP0131929B1 EP 0131929 B1 EP0131929 B1 EP 0131929B1 EP 84108236 A EP84108236 A EP 84108236A EP 84108236 A EP84108236 A EP 84108236A EP 0131929 B1 EP0131929 B1 EP 0131929B1
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EP
European Patent Office
Prior art keywords
transverse
helmet
ribs
grooves
transverse ribs
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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
Application number
EP84108236A
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German (de)
French (fr)
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EP0131929A3 (en
EP0131929A2 (en
Inventor
Siegfried Huber
Wolfgang Seehaus
Bernhard Hofer
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to AT84108236T priority Critical patent/ATE26908T1/en
Publication of EP0131929A2 publication Critical patent/EP0131929A2/en
Publication of EP0131929A3 publication Critical patent/EP0131929A3/en
Application granted granted Critical
Publication of EP0131929B1 publication Critical patent/EP0131929B1/en
Expired legal-status Critical Current

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    • 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
    • A42B3/0493—Aerodynamic helmets; Air guiding means therefor

Definitions

  • the invention relates to a protective helmet for motorcyclists of the type mentioned in the preamble of claim 1 and made known by US-A-4 075 714.
  • the transverse ribs are arranged in sections adjacent to one another at the top thereof, each of which, as shown in FIGS. 3a to 3c, has a sawtooth-shaped cross-sectional profile.
  • the well-known protective helmet serves to protect the head of an aircraft occupant when ejected from the aircraft, whereby a lift is generated by the air layer flowing over the top of the helmet. This is reduced by designing the cross ribs as a sawtooth profile and also arranging holes in it.
  • the transverse ribs present on the known protective helmet serve a different purpose than the transverse ribs or transverse grooves provided on the protective helmet according to the invention.
  • the aerofoil of an aircraft which emerges from US Pat. No. 4,354,648, has on its upper side a plurality of short profiled strips which are arranged in sections next to one another and in two or three rows one behind the other. Air swirls are generated by the profile strips in their area on the surface of the wing.
  • a motorcyclist usually keeps his head tilted more or less deeply at different vehicle speeds for aerodynamic or habitual reasons, whereby of course his protective helmet also takes on correspondingly different inclinations.
  • his protective helmet also takes on correspondingly different inclinations.
  • this results in changed air flow angles on the protective helmet and thus different sized air resistances.
  • the air flow acting on the rear of the helmet tears off considerably below the highest helmet curvature area, as a result of which an air flow flowing over the rear of the helmet towards the lower edge of the helmet has been formed.
  • the object of the invention is to design a protective helmet according to the preamble of claim 1 such that an air stream flowing approximately tangentially along the helmet tip at the highest curvature area of the helmet tip is reliably separated by suitable designs on the latter, and is thereby independent of the respective inclination position of the motorcycle driver's head, so that it cannot flow to the lower edge of the helmet.
  • transverse ribs or transverse grooves designed according to the invention Due to the transverse ribs or transverse grooves designed according to the invention, the air resistance in all riding positions and the resulting different head positions of the motorcyclist, that is to say also in motorcycles with racing handlebars or touring handlebars, is largely the same.
  • the transverse ribs or transverse grooves can also advantageously be provided practically without additional costs when a protective helmet is manufactured.
  • cross ribs on an existing safety helmet can also be retrofitted at low cost.
  • transverse ribs or transverse grooves are expediently each about 1 to 2 mm high or deep and about 4 to 8 mm wide (features of Pa claims 2 and 3).
  • transverse ribs are formed in sections, with one transverse rib section covering a gap in the adjacent row of transverse ribs (feature of patent claim 4).
  • the motorcycle driver's helmet 1 shown in the drawing is designed as an integral helmet and has a viewing opening 2, which can be covered by a lens 3. This is mounted on two bearing bolts 4 engaging in the helmet shell 10 so that they can be swiveled up and down.
  • the protective helmet 1 has in the area of the helmet tip 6 a number of transverse ribs 7 and transverse grooves 8, each of which has a rectangular cross-sectional profile and protrudes beyond the helmet surface 10 'or is set back from it.
  • the transverse rib 7 is located to the right of the break line, while the transverse grooves 8 are shown to the left of the break line.
  • grooves 70 are formed between the transverse ribs 7, while webs 80 each remain between the transverse grooves 8.
  • transverse ribs 7 projecting only slightly beyond the helmet surface 10 ′ can also be provided with transverse grooves 8 set back from it.
  • transverse ribs 7 and / or transverse grooves 8 extend transversely or obliquely to the inflow direction a over the helmet tip 6 to approximately in the region of the upper edge 2 'of the viewing opening 2. It is also conceivable that the transverse ribs 7 and / or transverse grooves 8 each run arrow-shaped, where they converge in plan view of the helmet tip 6 in the area of the home symmetry plane.
  • transverse ribs 7 and transverse grooves 8 which have a rectangular cross-sectional profile, each have a height or tieback b of approximately 1 to 2 mm, while their cross-sectional width c is approximately 4 to 8 mm; the grooves 70 formed between the transverse ribs 7 and the webs 80 remaining between the transverse grooves 8 each have approximately the same cross-sectional profile of the transverse ribs 7 and transverse grooves 8.
  • transverse ribs 7 can also be designed in sections so that the air flow flowing towards the helmet tip 6 is optimally torn off in its area by the provided transverse ribs 7 and transverse grooves 8.
  • One transverse rib section expediently covers a gap in the adjacent row of transverse ribs 7.
  • the air flow acting on the protective helmet 1 in the area of the helmet tip 6 is separated from the area designated by f, if not already in front of it, in the area designated by f and flows behind the protective helmet 1 continues approximately horizontally, as illustrated by the arrows labeled a '.

Abstract

1. A protective helmet (1) for motor-cyclists with transverse ribs (7) or transverse grooves (8) formed on or in the helmet surface (10') in the region of the helmet dome (6), which ribs or grooves extend transversely or obliquely with respect to the air-flow direction (a), characterised in that the transverse ribs (7) and/or transverse grooves (8) have a rectangular cross-sectional profile.

Description

Die Erfindung bezieht sich auf einen Schutzhelm für Motorradfahrer der im Oberbegriff des Patentanspruchs 1 genannten und durch die US-A-4 075 714 bekanntgewordene Art.The invention relates to a protective helmet for motorcyclists of the type mentioned in the preamble of claim 1 and made known by US-A-4 075 714.

Bei dem in der US-A-4075714 offenbarten Schutzhelm sind an dessen Kuppe die Querrippen abschnittsweise nebeneinanderliegend angeordnet, wobei diese - wie in Fig. 3a bis 3c dargestellt - jeweils eine sägezahnförmiges Querschnittsprofil haben. Der bekannte Schutzhelm dient zum Schutz des Kopfes eines Flugzeuginsassens beim Herausschleudern aus dem Flugzeug, wobei hierbei durch die über die Helmkuppe fließende Luftschicht ein Auftrieb erzeugt wird. Dieser wird durch die Gestaltung der Querrippen als ein Sägezahnprofil und auch das Anordnen von Löchern in diesem vermindert. Somit dienen die am bekannten Schutzhelm vorhandenen Querrippen einer anderen Zweckbestimmung als die am erfindungsgemäßen Schutzhelm vorgesehenen Querrippen oder Querrillen.In the protective helmet disclosed in US-A-4075714, the transverse ribs are arranged in sections adjacent to one another at the top thereof, each of which, as shown in FIGS. 3a to 3c, has a sawtooth-shaped cross-sectional profile. The well-known protective helmet serves to protect the head of an aircraft occupant when ejected from the aircraft, whereby a lift is generated by the air layer flowing over the top of the helmet. This is reduced by designing the cross ribs as a sawtooth profile and also arranging holes in it. Thus, the transverse ribs present on the known protective helmet serve a different purpose than the transverse ribs or transverse grooves provided on the protective helmet according to the invention.

Ferner hat der aus der US-A-4 354 648 hervorgehende Tragflügel eines Flugzeugs an seiner Oberseite mehrere kurze Profilleisten, welche abschnittsweise nebeneinanderliegend und in zwei oder drei Reihen hintereinanderliegend angeordnet sind. Durch die Profilleisten werden in deren Bereich an der Oberfläche des Tragflügels Luftwirbel erzeugt.Furthermore, the aerofoil of an aircraft, which emerges from US Pat. No. 4,354,648, has on its upper side a plurality of short profiled strips which are arranged in sections next to one another and in two or three rows one behind the other. Air swirls are generated by the profile strips in their area on the surface of the wing.

Ein Motorradfahrer hält üblicherweise seinen Kopf bei unterschiedlich hohen Fahrzeuggeschwindigkeiten aus aerodynamischen oder gewohnheitsmäßigen Gründen mehr oder weniger tief geneigt, wobei natürlich auch sein Schutzhelm entsprechend unterschiedliche Neigungslagen einnimmt. Durch diese ergeben sich jedoch veränderte Luftanströmwinkel auf den Schutzhelm und dadurch unterschiedlich große Luftwiderstände. Insbesondere bei einer stark geneigten Kopfhaltung des Motorradfahrers reißt wegen der glatten Helmoberfläche eines allgemein bekannten Motorradfahrer-Schutzhelms der diesen beaufschlagende Luftstrom an der Helmrückseite erheblich unterhalb des höchsten Helmkrümmungsbereichs ab, wodurch sich erwiesenermaßen eine über die Helmrückseite, zum unteren Helmrand hin fließende Luftströmung bildet. Da diese sowohl mit einem über den Rücken des Motorradfahrers zu seinem Hals hin hochströmenden als auch mit einem über dessen Schultern schräg nach oben und hinten strömenden Luftstrom zusammentrifft, entsteht im Halsbereich des Motorradfahrers durch Luftwirbel und Querströmungen ein seinen Hals stark belastender Winddruck, was insbesondere während einer längeren Motorradfahrt stark ermüdend wirkt.A motorcyclist usually keeps his head tilted more or less deeply at different vehicle speeds for aerodynamic or habitual reasons, whereby of course his protective helmet also takes on correspondingly different inclinations. However, this results in changed air flow angles on the protective helmet and thus different sized air resistances. Especially in the case of a strongly inclined head posture of the motorcycle rider, due to the smooth helmet surface of a well-known motorcycle rider protective helmet, the air flow acting on the rear of the helmet tears off considerably below the highest helmet curvature area, as a result of which an air flow flowing over the rear of the helmet towards the lower edge of the helmet has been formed. Since this coincides with an air flow flowing up over the back of the motorcyclist to his neck as well as with an air flow that flows obliquely upwards and backwards over his shoulders, wind turbulence and cross currents create a wind pressure on his neck, which is particularly stressful during, especially during after a long motorcycle ride is very tiring.

Aus diesem Grund ist gemäß einer älteren deutschen Gebrauchsmusteranmeldung, nachveröffentlicht als DE-U-8 316 411, ein Schutzhelm vorgeschlagen worden, dessen gesamte Oberfläche mit nebeneinander angeordneten kalottenförmigen Vertiefungen versehen ist. Das erfindungsgemäße Vorsehen von Querrippen bzw. Querrillen mit rechteckförmigem Querschnittsprofil an einem Schutzhelm ist demgegenüber neu.For this reason, according to an older German utility model application, republished as DE-U-8 316 411, a protective helmet has been proposed, the entire surface of which is provided with dome-shaped depressions arranged next to one another. The provision according to the invention of transverse ribs or transverse grooves with a rectangular cross-sectional profile on a protective helmet is new.

Aufgabe der Erfindung ist es, einen Schutzhelm gemäß dem Oberbegriff des Patentanspruchs 1 derart auszubilden, daß ein etwa tangential an der Helmkuppe entlang strömender Luftstrom am höchsten Krümmungsbereich der Helmkuppe durch geeignete Ausbildungen an dieser zuverlässig und dabei unabhängig von der jeweiligen Neigungslage des Motorradfahrerkopfes abgetrennt wird, so daß er nicht zum unteren Helmrand hin fließen kann.The object of the invention is to design a protective helmet according to the preamble of claim 1 such that an air stream flowing approximately tangentially along the helmet tip at the highest curvature area of the helmet tip is reliably separated by suitable designs on the latter, and is thereby independent of the respective inclination position of the motorcycle driver's head, so that it cannot flow to the lower edge of the helmet.

Zur Lösung der Aufgabe sind die im kennzeichnenden Teil des Patentanspruchs 1 dargelegten Merkmale vorgesehen :

  • Durch die erfindungsgemäß ein rechteckförmiges Querschnittsprofil aufweisenden Querrippen oder Querrillen wird der den Schutzhelm an seinem oberen Bereich beaufschlagende Luftstrom am höchsten Krümmungsbereich der Helmkuppe, also im Bereich einer zu letzterer etwa tangential verlaufenden Anströmrichtung, abgetrennt. Dieser, durch die rechteckförmig gestalteten Querrippen bzw. Querrillen etwa waagrecht fließende Luftstrom vereinigt sich mit dem über die Schultern des Motorradfahrers schräg nach oben und hinten fließenden sowie mit dem über dessen Rücken hochströmenden Luftstrom im Bereich der Helmkuppe - wobei die einzelnen Luftströme gewissermaßen als « Kraftvektoren wirken -, so daß der Halsbereich des Motorradfahrers durch den aufwärts, zur Helmkuppe hin verlagerten Zusammenfluß der Luftströme vergleichsweise erheblich vom Winddruck entlastet wird.
To achieve the object, the features set out in the characterizing part of patent claim 1 are provided:
  • Due to the transverse ribs or transverse grooves having a rectangular cross-sectional profile according to the invention, the air flow acting on the protective helmet at its upper region is separated at the highest curvature region of the helmet tip, that is to say in the region of an inflow direction which is approximately tangential to the latter. This air flow, which flows approximately horizontally through the rectangular-shaped cross ribs or cross grooves, combines with the air flow that flows obliquely up and back over the shoulders of the motorcycle rider and with the air flow flowing up the back of the motorcycle in the area of the helmet tip - the individual air flows to a certain extent as «force vectors act -, so that the neck area of the motorcycle rider is relieved of the wind pressure comparatively considerably by the upward, to the helmet tip shifted confluence of air currents.

Hierdurch werden Ermüdungen im Halsbereich des Mottorradfahrers vor allem im mittleren Geschwindigkeitsbereich (120 bis 140 km/h) wesentlich verringert. Ferner können dabei auch Dauerhöchstgeschwindigkeiten erheblich gesteigert werden. Durch die erfindungsgemäß ausgebildeten Querrippen oder Querrillen ist ferner der Luftwiderstand in allen Fahrpositionen und den sich dadurch ergebenden unterschiedlichen Kopfhaltungen des Motorradfahrers, also auch bei Motorrädern mit Rennlenkern oder Tourenlenkern, weitgehend gleichgroß. Auch können die Querrippen oder Querrillen vorteilhafterweise praktisch ohne zusätzliche Kosten bei Neuanfertigung eines Schutzhelmes vorgesehen werden. Schließlich sind auch Querrippen an einem vorhandenen Schutzhelm mit geringem Kostenaufwand nachrüstbar.This significantly reduces fatigue in the neck area of the motorcycle rider, especially in the medium speed range (120 to 140 km / h). In addition, continuous top speeds can be increased considerably. Due to the transverse ribs or transverse grooves designed according to the invention, the air resistance in all riding positions and the resulting different head positions of the motorcyclist, that is to say also in motorcycles with racing handlebars or touring handlebars, is largely the same. The transverse ribs or transverse grooves can also advantageously be provided practically without additional costs when a protective helmet is manufactured. Finally, cross ribs on an existing safety helmet can also be retrofitted at low cost.

Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.Advantageous further developments can be found in the subclaims.

Zweckmäßigerweise sind die Querrippen bzw. Querrillen jeweils etwa 1 bis 2 mm hoch bzw. tief und etwa 4 bis 8 mm breit (Merkmale der Patentansprüche 2 und 3).The transverse ribs or transverse grooves are expediently each about 1 to 2 mm high or deep and about 4 to 8 mm wide (features of Pa claims 2 and 3).

Das Abreißen des an die Helmkuppe anströmenden Luftstroms kann dadurch gefördert werden, daß die Querrippen abschnittsweise ausgebildet sind, wobei jeweils ein Querrippenabschnitt eine Lücke der benachbarten Reihe von Querrippen überdeckt (Merkmal des Patentanspruchs 4).The tearing off of the air stream flowing to the helmet tip can be promoted in that the transverse ribs are formed in sections, with one transverse rib section covering a gap in the adjacent row of transverse ribs (feature of patent claim 4).

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt, welche im folgenden erläutert wird.An embodiment of the invention is shown in the drawing, which is explained below.

Der in der Zeichnung dargestellte Motorradfahrerschutzhelm 1 ist als ein Integralhelm gestaltet und weist eine Sichtöffnung 2 auf, welche von einer Sichtscheibe 3 überdeckbar ist. Diese ist an zwei in die Helmschale 10 eingreifenden Lagerbolzen 4 hoch- und niederschwenkbar gelagert.The motorcycle driver's helmet 1 shown in the drawing is designed as an integral helmet and has a viewing opening 2, which can be covered by a lens 3. This is mounted on two bearing bolts 4 engaging in the helmet shell 10 so that they can be swiveled up and down.

Der Schutzhelm 1 hat im Bereich der Helmkuppe 6 eine Anzahl von Querrippen 7 und Querrillen 8, welche jeweils ein rechteckförmiges Querschnittsprofil haben und über die Helmoberfläche 10' hinausragen bzw. von dieser zurückgesetzt sind. Dabei befinden sich in der Zeichnung rechts von der Bruchlinie die Querrippe 7, während links von der Bruchlinie die Querrillen 8 dargestellt sind. Wie ferner in der Zeichnung ersichtlich, sind zwischen den Querrippen 7 jeweils Nuten 70 gebildet, während zwischen den Querrillen 8 jeweils Stege 80 verbleiben. Natürlich können auch nur geringfügig über die Helmoberfläche 10' hinausragende Querrippen 7 bei dabei von dieser zurückgesetzten Querrillen 8 vorgesehen werden. Die Querrippen 7 und/oder Querrillen 8 erstrecken sich quer oder auch schräg zur Anströmrichtung a verlaufen über die Helmkuppe 6 bis etwa in den Bereich der Oberkante 2' der Sichtöffnung 2. Es ist auch denkbar, daß die Querrippen 7 und/oder Querrillen 8 jeweils pfeilförmig verlaufen, wobei sie in Draufsicht auf die Helmkuppe 6 im Bereich der Heimsymmetrieebene zusammenlaufen.The protective helmet 1 has in the area of the helmet tip 6 a number of transverse ribs 7 and transverse grooves 8, each of which has a rectangular cross-sectional profile and protrudes beyond the helmet surface 10 'or is set back from it. In the drawing, the transverse rib 7 is located to the right of the break line, while the transverse grooves 8 are shown to the left of the break line. As can also be seen in the drawing, grooves 70 are formed between the transverse ribs 7, while webs 80 each remain between the transverse grooves 8. Of course, transverse ribs 7 projecting only slightly beyond the helmet surface 10 ′ can also be provided with transverse grooves 8 set back from it. The transverse ribs 7 and / or transverse grooves 8 extend transversely or obliquely to the inflow direction a over the helmet tip 6 to approximately in the region of the upper edge 2 'of the viewing opening 2. It is also conceivable that the transverse ribs 7 and / or transverse grooves 8 each run arrow-shaped, where they converge in plan view of the helmet tip 6 in the area of the home symmetry plane.

Die ein rechteckförmiges Querschnittsprofil aufweisenden Querrippen 7 und Querrillen 8 haben jeweils eine Höhe bzw. Tiebe b von etwa 1 bis 2 mm, während ihre Querschnittsbreite c etwa 4 bis 8 mm beträgt ; die zwischen den Querrippen 7 gebildeten Nuten 70 und zwischen den Querrillen 8 verbleibenden Stege 80 haben jeweils etwa das gleichgroße Querschnittsprofil der Querrippen 7 und Querrillen 8. Diese beginnen schließlich um ein Maß e, das etwa 50 bis 80 mm beträgt, von der Oberkante 2' der Sichtöffnung 2 entfernt und erstrecken sich über die Helmkuppe 6 über einen Winkelbereich a = 60° bis 100°.The transverse ribs 7 and transverse grooves 8, which have a rectangular cross-sectional profile, each have a height or tieback b of approximately 1 to 2 mm, while their cross-sectional width c is approximately 4 to 8 mm; the grooves 70 formed between the transverse ribs 7 and the webs 80 remaining between the transverse grooves 8 each have approximately the same cross-sectional profile of the transverse ribs 7 and transverse grooves 8. These finally begin by a dimension e, which is approximately 50 to 80 mm, from the upper edge 2 ' removed from the viewing opening 2 and extend over the helmet tip 6 over an angular range a = 60 ° to 100 °.

Damit der an die Helmkuppe 6 anströmende Luftstrom in deren Bereich optimal durch die vorgesehenen Querrippen 7 und Querrillen 8 abgerissen wird, können die Querrippen 7 auch abschnittsweise ausgebildet sein. Dabei überdeckt zweckmäßigerweise jeweils ein Querrippenabschnitt eine Lücke der benachbart verlaufenden Reihe von Querrippen 7.The transverse ribs 7 can also be designed in sections so that the air flow flowing towards the helmet tip 6 is optimally torn off in its area by the provided transverse ribs 7 and transverse grooves 8. One transverse rib section expediently covers a gap in the adjacent row of transverse ribs 7.

Durch die erfindungsgemäß an der Helmkuppe 6 vorgesehenen Querrippen 7 und Querrillen 8 wird der den Schutzhelm 1 im Bereich der Helmkuppe 6 beaufschlagende Luftstrom unabhängig von der jeweiligen Neigungslage des Schutzhelms 1 in dem mit f bezeichneten Bereich - wenn nicht bereits vor diesem - abgetrennt und fließt hinter dem Schutzhelm 1 etwa waagerecht verlaufend weiter, wie die mit a' bezeichneten Pfeile veranschaulichen.By means of the transverse ribs 7 and transverse grooves 8 provided according to the invention on the helmet tip 6, the air flow acting on the protective helmet 1 in the area of the helmet tip 6 is separated from the area designated by f, if not already in front of it, in the area designated by f and flows behind the protective helmet 1 continues approximately horizontally, as illustrated by the arrows labeled a '.

Claims (4)

1. A protective helmet (1) for motor-cyclists with transverse ribs (7) or transverse grooves (8) formed on or in the helmet surface (10') in the region of the helmet dome (6), which ribs or grooves extend transversely or obliquely with respect to the air-flow direction (a), characterised in that the transverse ribs (7) and/or transverse grooves (8) have a rectangular cross-sectional profile.
2. A protective helmet according to Claim 1, characterised in that the rectangular-section transverse ribs (7) and/or transverse grooves (8) each have a height or depth (b) respectively of about 1 to 2 mm.
3. A protective helmet according to Claim 1, characterised in that the rectangular-section transverse ribs (7) and/or transverse grooves (8) each have a cross-sectional width (c) of about 4 to 8 mm.
4. A protective helmet according to Claim 1 wherein the transverse ribs are formed in sections, characterised in that, in each case, a transverse rib section covers a gap of the adjacent row of transverse ribs (7).
EP84108236A 1983-07-15 1984-07-12 Safety helmet for motor cyclists Expired EP0131929B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108236T ATE26908T1 (en) 1983-07-15 1984-07-12 HELMET FOR MOTORCYCLISTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3325601 1983-07-15
DE3325601A DE3325601C2 (en) 1983-07-15 1983-07-15 Protective helmet for motorcyclists

Publications (3)

Publication Number Publication Date
EP0131929A2 EP0131929A2 (en) 1985-01-23
EP0131929A3 EP0131929A3 (en) 1985-03-06
EP0131929B1 true EP0131929B1 (en) 1987-05-06

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EP84108236A Expired EP0131929B1 (en) 1983-07-15 1984-07-12 Safety helmet for motor cyclists

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EP (1) EP0131929B1 (en)
AT (1) ATE26908T1 (en)
DE (2) DE3325601C2 (en)

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USD762925S1 (en) 2015-02-04 2016-08-02 3M Innovative Properties Company Helmet rib

Also Published As

Publication number Publication date
EP0131929A3 (en) 1985-03-06
DE3463437D1 (en) 1987-06-11
DE3325601C2 (en) 1985-06-27
ATE26908T1 (en) 1987-05-15
EP0131929A2 (en) 1985-01-23
DE3325601A1 (en) 1985-01-31

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