EP0102951B1 - Blendschutzeinrichtung - Google Patents

Blendschutzeinrichtung Download PDF

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Publication number
EP0102951B1
EP0102951B1 EP82901333A EP82901333A EP0102951B1 EP 0102951 B1 EP0102951 B1 EP 0102951B1 EP 82901333 A EP82901333 A EP 82901333A EP 82901333 A EP82901333 A EP 82901333A EP 0102951 B1 EP0102951 B1 EP 0102951B1
Authority
EP
European Patent Office
Prior art keywords
glare
base runner
runner section
blades
glarefoil
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
Application number
EP82901333A
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English (en)
French (fr)
Other versions
EP0102951A4 (de
EP0102951A1 (de
Inventor
Donald W. Schmanski
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Individual
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Individual
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Filing date
Publication date
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Priority to AT82901333T priority Critical patent/ATE32928T1/de
Publication of EP0102951A1 publication Critical patent/EP0102951A1/de
Publication of EP0102951A4 publication Critical patent/EP0102951A4/de
Application granted granted Critical
Publication of EP0102951B1 publication Critical patent/EP0102951B1/de
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/06—Anti-dazzle arrangements ; Securing anti-dazzle means to crash-barriers

Definitions

  • the present invention relates to a glarefoil assembly according to the preamble of claim 1.
  • a glarefoil assembly is known from DE-A-2 320 795.
  • Another attempt to solve the glare problem consists of an aluminum screen mounted to steel posts along the top of the media barrier.
  • the screen is effective in eliminating headlight glare, but maintenance difficulties make this method impractical.
  • the screens would often come loose and sag when buffeted by the wind and air currents created by passing automobiles. Projecting objects from cars and trucks would often catch the screen and tear large holes or otherwise damage the screen.
  • Such screens were also subject to mischief in the form of thrown objects such as pop bottles or rocks which develop large holes in the screen, necessitating further maintenance. Often in repairing even small holes in the screen, large whole sections of screen had to be replaced, thus adding to labor and material costs.
  • the screens also created a barrier for police, ambulance and other emergency vehicles and personnel that need quick access across the highway in times of accident or emergency. Often, large holes must be cut in the screen to enable quick response. This not only causes critical delays in treating accident victims and in responding to emergencies, but also necessitates additional cost in later reparations of the screen.
  • the aforementioned DE-A-2 320 795 describes a glarefoil assembly eliminating the problems caused by the screens and comprising glarefoils which are individually mounted on the top of the median barrier.
  • These glarefoils sometimes referred to as paddles, are typically elliptical in shape extending up to 122 cm (4 feet) above the median barrier and are commonly made of polyethylene or other thermoplastic material.
  • These glarefoils preserved cross access over the divider and solved some of the maintenance problems associated with the screens. Also, the flexibility of these glarefoils allows them to yield upon impact by protruding or thrown objects and then recover their original shape and position.
  • each glarefoil is individually mounted to the median barrier by several bolts.
  • the installation or removal of each glarefoil is timely and therefore costly.
  • the thermoplastic glarefoils become brittle when exposed to extreme temperatures and ultraviolet radiation from the sun.
  • these glarefoils often break off at the bolt mountings when constantly buffeted by the wind or the everyday air currents from passing cars. Therefore, although the individual glarefoil system helped solve part of the problem of absorbing energy from an occasional random impact they failed to deal with the problem of absorbing the everyday vibrational energy caused by wind and passing cars.
  • effective glarefoil assembly must be capable of absorbing and dissipating substantial amounts of vibrational energy which result from the constant everyday buffetings of the wind, as well as impact from vehicles and other objects.
  • the problem to be solved by the invention is to provide a glarefoil assembly according to the preamble of claim 1 which is capable of absorbing and dissipating substantial amounts of vibrational energy resulting from the constant everyday buffetings of the wind, as well as impact from vehicles and other objects.
  • the glarefoil assembly of the present invention includes a plurality of glare blades and means for mounting them to the top face of a base runner section to form an integral, modular structure.
  • the bottom face of the base runner section is attached to the top of a median barrier.
  • Succeeding base runner sections may be mounted end to end in series to form a continuous glarefoil array along any distance desired. Since the base runner may be installed in sections with several glare blades mounted to each section, installation and removal is much more expeditious and inexpensive than an individual glarefoil system which requires individual mounting.
  • the base runner also functions to receive vibrational energy which is absorbed by the glare blades. This is facilitated by constructing the base runner and glare blades of flexible materials having mutually compatible elastic moduli, and by firmly securing the glare blades to the base runner. When the glare blades are buffeted by the wind, some of the resultant vibrational energy is transferred to the base runner which then also vibrates. This vibrational energy is transferred into the base runner in the form of wave motions or vibrations which are superimposed on other vibrations within the base runner from other glare blades, as well as rebound energy from the mounted ends of the base runner.
  • the effect of superimposition of nonharmonic vibrations within the base runner results in a cancellation of part of the vibration energy as opposing waves traverse the base runner.
  • This dissipation of vibrational energy relieves the glarefoil assembly of a portion of the vibrations within the glarefoil which would otherwise tend to concentrate at local points of stress where the glare blades are attached to the base runner, thus greatly reducing the risk of failure.
  • the glare blades are rigid enough to stand upright with respect to the base runner, but are also flexible enough to yield to the impact of an object and then restore themselves to their original positions.
  • the present invention is capable of absorbing and dissipating both impact energy and everyday vibrational energy, and as a result has a longer life expectancy.
  • An integral part of the present invention includes the discovery that in a typical highway environment of passing high speed traffic, pulsating air currents develop which set the glarefoils into a state of mild vibration which may often be barely noticeable. Over extended periods of time, however, this seemingly trivial energy is concentrated at an immovable bolt location where the glarefoil is attached to the concrete median. Because of the extreme high modulus of the concrete and steel mounting bolt, the vibrational energy remains in the glarefoil until dissipated.
  • the plastic of the glarefoil In contrast to the steel bolt and concrete of the median, the plastic of the glarefoil is flexible. At the point of attachment, therefore, there is an extreme mismatch in modulus of elasticity which eventually leads to material failure around the bolt attachment location.
  • the present invention provides for partial translation of this vibrational energy out of the glarefoil and into an elongated base member to thereby reduce the degree of vibrational movement at mounting bolt locations. Furthermore, the effects of the transferred vibrational energy are reduced by the fact that this energy is propagated into the base member in the form of waves which superimpose over waves from other light blocking members and thereby cause a partial cancellation or "interference" of superimposed waves.
  • the attachment of a plurality of light obstructing members to a single base member permits the obstructing members to cooperatively reduce the actual vibrational energy developed in the base member, as compared to vibrational energy which would require dissipation if each obstructing member were attached to an independent and separate base member alone.
  • a synergistic effect arises wherein the benefit exceeds the sum of the individual contributions made by the inventive structure. Mathematically, this could be illustrated in a glarefoil assembly with four blades attached to a single base member in the following manner.
  • This interference pattern is specifically facilitated by matching the compliance of the base member with that of the glare blades. This tends to reduce reflectional vibrations such as experienced by the conventional plastic glare blade as it vibrates against a rigid concrete median barrer.
  • FIG. 12 An embodiment of this glarefoil assembly is generally designated 12 in Figures 1 and 2.
  • Elongated light obstructing members 16 (also referred to herein as glare blades) are mounted to an elongated base runner section generally designated 13 at the top face 14a thereof, with angular support plates 26 providing the means for rigid attachment thereto.
  • the bottom face 14b of base runner 13 is attached to a median barrier 10 along a divided highway represented by traffic lanes 30 and 32.
  • Angular support plates 26 operate as rigid attachment means between the glare blades 16 and base runner 13. Although the figures illustrate the use of pop rivets 27 and 28, it will be noted that angular support plates 26 could be directly epoxied to glare blades 16 and base runner 13. Also, it will also be apparent that where minimal impact or vibrational energy is expected, glare blades 16 could be directly epoxied to top face 14a of base runner 13 without the need for angular support plates 26. Typically, angular support plates 26 are made of aluminum and add strength to the assembly as well as facilitate the transfer of vibrational energy as will be explained later. Other rigid metals or plastics could be used, provided they meet the strength requirement and facilitate the referenced energy transfer to the base runner section.
  • Strengthening ribs 18 located at the edges of glare blades 16 provide rigidity and form an I-Beam configuration with the web section 42 of the glare blades 16 (see Figure 3). As best shown in Figures 1, 2 and 4, the ends of strengthening ribs 18 interlock with slots 34 in securing ribs 20a located at the edges of base runner 13. Securing ribs 20a extend upward from top face 14a and provide extra contact of glare blades 16 with base runner 13 in better securing glare blades 16 thereto. Securing ribs 20a also provide a more efficient energy path for the transfer of vibrational energy from glare blades 16 to base runner 13, as will be explained later.
  • reinforcement ribs 20b which are also located at the edges of base runner 13 and extend downward from bottom face 14b.
  • a spacing means such as rib 24 located in the center of bottom face 14b cooperates with reinforcement ribs 20b to displace the bottom face 14b from the median barrier 10 and thereby accommodate the heads 29 of pop rivets 28 in the space therebetween, while at the same time providing a rigid mounting site.
  • an object such as a washer may also be used as the spacing means 24 to enable rigid attachment of the base runner 13 against median barrier 10 and provides a space to accommodate pop rivet heads 29.
  • Base runner section 13 is of sufficient length to permit a substantial receipt of vibrational energy from attached glare blades 16. As the wind and air currents from passing automobiles cause the glare blades 16 to vibrate, part of the vibrational energy is transferred through the rigid attachment means into the base runner, where it is dissipated. This is opposed to the prior art structure in which energy transfer was minimal due to the comparatively high modulus (E) of the median barrier to which the glare blades were directly mounted.
  • E modulus
  • the present invention provides for dissipation of vibrational energy . throughout the glarefoil structure, and particularly into the base runner.
  • the transfer of vibrational energy from glare blades 16 to base runner 13 is facilitated by making the glare blades, the base runner section and the angular support plate 26 or other attachment means of materials whose physical characteristics enhance their capability to transfer vibrational energy.
  • Elastic modulus and moment of inertia are two such physical characteristics which can be exploited to more easily effect such a transfer.
  • reflection of vibrational energy back into the glare blade is reduced. Instead, the vibrational energy is carried directly into the base runner in accordance with well known wave propagation theory.
  • the second element of moment of inertia its use in the present structure is primarily for the purpose of developing rigidity to improve the support and resilience of the glare blade and base member portions of the glarefoil assembly.
  • This more rigid structure tends to enhance the propagation of vibrational waves in the same manner that a taut string or rubber band has better wave transmittal characteristics than a loose string.
  • the use of ribs and other reinforcing structure which increase moment of inertia operate to improve resilience and transmittance of vibrational energy.
  • the glare blades 16 and base runner 13 are made of fiberglass or fiber reinforced plastic.
  • the elastic modulus of fiberglass composite (about 6.89 ⁇ 41.34 ⁇ 10 9 N/m 2 or approx. 1-6x10 6 psi) is well adapted for such a glarefoil assembly because it has inherent rigidity and weatherability to remain functional, yet it can be structured to withstand random impacts from passing vehicles or objects without incurring immediate need for maintenance.
  • Such fiberglass composite material can also be pultruded or otherwise formed into various geometric. cross-sections to maximize opposing characteristics of flexibility and rigidity at minimal cost. See for example, US-A-4,092,081.
  • moment of inertia can also be used to effect a better transfer of vibrational energy within glarefoil assembly 12.
  • the moment of inertia of an object is determined largely by its geometric configuration.
  • the rectangular cross-section of the base runner illustrated in Figure 5a typically will have only one primary mode of vibration in a glarefoil assembly of the present invention. This is indicated by arrows 3 and 3', respectively as an up and down direction.
  • FIG. 5b shows such a configuration, that of an I-Beam or modified Tri-Beam.
  • the I-Beam configurated base runner 13 of Figure 5b have a vertical mode of vibration as indicated by arrows 4 and 4', but it also develops a rotational mode of vibration indicated by arrows 5 and 5'.
  • This configuration is achieved by having a thin web section 40, in conjunction with securing ribs 20a and reinforcement ribs 20b.
  • the web section 40 has a low moment of inertia which improves flexibility.
  • the strengthening ribs 18 of glare blades 16 also employ this concep. Strenghtening ribs 18 form an I-Beam configuration with thin web section 42, as best seen in Figure 3.
  • the additional vibrational modes created by joining strengthening ribs 18 to web section 42 enhances translation of multiple modes of energy transfer to the base runner section. This method of energy transfer also avoids excessive concentration of stress at local sites and therefore reduces the rate of wear toward failure.
  • securing ribs 20a which provide- improved rigid contact between the glare blades 16 and the base runner 13. Not only does the extra contact provide enhanced stability to the upright member, but it also provides more effective contact area between the ribbed portions of the respective glare blades 16 and base runner 13. This integral contact between the more rigid rib portions tend to make the subject glarefoil assembly respond to energy vibration as a single, integral unit.
  • angular support plates 26 In providing additional contact and support with glare blades 16 and base runner 13, angular support plates 26 also provide an additional energy path for dissipating vibrational energy from the glare blade 16 to the base runner 13.
  • glarefoil assembly 12 to median barrier 10 can be accomplished in many different ways.
  • One simple method is to drill holes in the concrete median barrier and insert an iron stud 36. Holes 22 in corresponding position to the studs 36 are drilled in the base runner 13. The studs 36 are then inserted into holes 22 and the assembly 12 is then firmly secured to median barrier 10 by means of washers and steel nuts 38.
  • a possible alternative method of installation would be to epoxy the ends of the base runner 13 or ribs 20b and 24 directly to the median barrier 10.
  • each glare blade may vary, depending on the width of the blade and the relative angle of implacement with respect to the longitudinal axis of the base runner. It should be apparent that wider glare blades will enable greater spacial separation. Furthermore, the maximum spacial displacement between adjacent glare blades will be a function of blade orientation, since the blades must effectively block out all opposing headlight glare during close visual proximity between passing cars.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (19)

1. Blendschutzeinrichtung (12) zur Befestigung an einer mittleren Leitplanke (10), die längs einer unterteilten Autobahn verläuft, mit:
wenigstens einem länglichen Basisschienenabsschnitt (13), der eine Unterseite zur Befestigung an der genannten mittleren Leitplanke (10) und eine Oberseite (14a) aufweist, die der Unterseite (14b) gegenüberliegt;
wenigstens zwei länglichen Blendschutzlamellen (16), durch die eine Scheinwerferlichtblendung durch auf der unterteilten Autobahn entgegenkommenden Verkehr verringerbar ist; und
steifen Befestigungsmitteln (26; 50), die mit einem Ende von jeder Blendschutzlamelle (16) und der genannten Oberseite (14a) des genannten Basisschienenabschnitts (13) derart gekoppelt sind, daß sich die genannten Blendschutzlamellen (16) in einer aufrechten, Licht unterbrechenden Ausrichtung in Bezug auf eine projektierte Stelle der mittleren Leitplanke befinden, dadurch gekennzeichnet, daß
der genannte Basisschienenabschnitt (13) eine ausreichende Länge aufweist, eine wesentliche übertragung von Schwingungsenergie von einer befestigten Blendschutzlamelle aufzunehmen, die genannten Blendschutzlamellen (16), der genannte Basisschienenabschnitt (13) und die genannten Befestigungsmittel (26; 50) Materialzusammensetzungen aufweisen, deren physikalische Kenngrößen die übertragung von wesentlicher Schwingungsenergie von den genannten Blendschutzlamellen (16) in den genannten Basisschienenabschnitt (13) ermöglichen, um eine Dissipation der genannten Schwingungsenergie zu unterstützen.
2. Blendschutzeinrichtung nach Anspruch 1, dadurch, gekennzeichnet, daß wenigstens vier der genannten Blendschutzlamellen (16) steif an einem Ende an dem Basisschienenabschnitt (13) angebracht sind, der Basisschienenabschnitt (13) eine integrale Einheitsstruktur mit den an ihm befestigten, genannten Blendschutzlamellen (16) bildet, die genannten Blendschutzlamellen (16) voneinander beabstandet und längs eines jeden Basisschienenabschnitts (16) so ausgerichtet sind, daß die von den genannten Blendschutzlamellen (16) verhinderte Menge an Scheinwerferblendlicht maximal ist, während die für die Verhinderung benötigte Größe der Oberflächenfläche der genannten Blendschutzlamellen (16) minimiert ist.
3. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sich wenigstens eine Befestigungsrippe (20a) an einem Rand des genannten Basisschienenabschnitts (30) befindet und von der genannten Oberseite (14a) nach oben erstreckt, die genannte Befestigungsrippe (20a) einen Schlitz (34) aufweist, der in enger Verbindung mit dem Ende der genannten Blendschutzlamellen (16) steht und einen zusätzlichen Kontakt der Blendschutzlamelle (16) mit dem genannten Basisschienabschnitt (13) schafft, um die genannte Blendschutzlamelle (16) besser an'diesem zu befestigen und einem wirkungsvolleren Weg für die übertragung der genannten Schwingungsenergie von den genannten Blendschutzlamellen (16) zu dem genannten Basisschienenabschnitt (13) liefert.
4. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie wenigstens zwei Verstärkungsrippen (20b) aufweist, die sich an den Rändern des genannten Basisschienenabschnitts (13) befinden und sich von der genannten Unterseite (14b) nach unten erstrecken.
5. Blendschutzeinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß sie Mittel (24) zur Beabstandung der genannten Unterseite (14a) von der genannten mittleren Leitplanke (10) aufweist, während diese gleichzeitig einen steifen Befestigungsplatz zur Befestigung an einem Befestigungsbolzen liefern, der von der genannten mittleren Leitplanke (10) hervorsteht.
6. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die steifen Befestigungsmittel eine abgewinkelte Stützplatte (26) sind.
7. Blendschutzeinrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die abgewinkelte Stützplatte
(26) an dem Basisschienenabschnitt durch Pop-Nieten (28) befestigt ist.
8. Blendschutzeinrichtung nach Anspruch 7, dadurch gekennzeichnet, daß sie wenigstens zwei Verstärkungsrippen (20b), die sich an den Rändern des genannten Basisschienenabschnitts (13) befinden und sich von der genannten Unterseite (14b) nach unten erstrecken, und eine Abstandsrippe (24) umfaßt, die sich an der genannten Unterseite (14b) befindet, die genannte Abstandsrippe (24) mit den genannten Verstärkungsrippen (20b) zusammenarbeitet, um die genannten Pop-Nieten (28) in dem Raum zwischen der genannten Unterseite (14b) und der genannten mittleren Leitplanke (10) aufzunehmen.
9. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die genannte Blendschutzlamelle (16) an dem genannten Basisschienenabschnitt (13) mit einem Winkel von wenigstens ungefähr 70 Grad in Bezug auf die Achse befestigt ist, die von dem genannten länglichen Basisschienenabschnitt (13) gebildet wird.
10. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der genannte Basisschienenabschnitt (13) und die genannte Blendschutzlamelle (16) nicht reflektierend sind.
11. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der genannte Basisschienenabschnitt (13) und die genannte Blendschutzlamelle (16) aus Kunststoffen mit Elastizitätskonstanten hergestellt sind, die für die übertragung von Schwingungsenergie von den genannten Blendschutzlamellen (16) auf den genannten Basisschienenabschnitt (13) gegenseitig kompatibel sind.
12. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der genannte Basisschienenabschnitt (13) und die genannten Blendschutzlamellen (16) aus faserverstärkem, wärmehärtendem Kunstharz hergestellt sind, daß die Verstärkung Fasern in Längsrichtung und Fasern in Querrichtung in Bezug auf die Längsrichtung umfaßt.
13. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der genannte Basisschienenabschnitt (13) mit einer geometrischen Ausgestaltung ausgebildet ist, welche die Anzahl der Schwingungsmoden des genannten Basisschienenanschnitts erhöht und dadurch dessen Fähigkeit verstärkt, die genannte Schwingungsenergie von der genannten Blendsschutzlamelle aufzunehmen und eine teilweise nicht schwingungsmäßig Dissipation derselben aufgrund einer nichtharmonischen überlappung von Schwingungsfortpflanzungen für jede Blendschutzlamelle (16) zum Ergebnis hat.
14. Blendschutzeinrichtung nach Anspruch 13, dadurch gekennzeichnet, daß der Basisschienenabschnitt (13) die Ausgestaltung eines I-Trägers aufweist.
15. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie Verstärkungsrippen
(18) aufweist, die sich an den Rändern der Blendschutzlamellen (16) befinden, um eine Steifigkeit zu schaffen, die Blendschutzlamelle (16) einen dünnen Bandabschnitt (42) zwischen den genannten Verstärkungsrippen (18) aufweist und mit diesem die Ausgestaltung eines I-Trägers bildet.
16. Blendschutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die genannten steifen Befestigungsmittel eine geschlitzte Befestigungseinrichtung (50) umfassen, welche die Blendschutzlamelle
(16) in steifer, aufrechter Befestigung an dem Basisabschnitt längs dessen entsprechender Seiten festklammert.
EP82901333A 1982-03-17 1982-03-17 Blendschutzeinrichtung Expired EP0102951B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82901333T ATE32928T1 (de) 1982-03-17 1982-03-17 Blendschutzeinrichtung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1982/000360 WO1983003271A1 (en) 1982-03-17 1982-03-17 Glarefoil assembly

Publications (3)

Publication Number Publication Date
EP0102951A1 EP0102951A1 (de) 1984-03-21
EP0102951A4 EP0102951A4 (de) 1985-09-09
EP0102951B1 true EP0102951B1 (de) 1988-03-09

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ID=22167880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82901333A Expired EP0102951B1 (de) 1982-03-17 1982-03-17 Blendschutzeinrichtung

Country Status (5)

Country Link
EP (1) EP0102951B1 (de)
AT (1) ATE32928T1 (de)
AU (1) AU8390782A (de)
DE (1) DE3278213D1 (de)
WO (1) WO1983003271A1 (de)

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Publication number Priority date Publication date Assignee Title
CN105780677A (zh) * 2015-12-18 2016-07-20 祝永亮 旋转景观防眩板

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FR2610650B1 (fr) * 1987-02-11 1989-10-27 Allibert Sa Ecran antieblouissant
FR2621622B1 (fr) * 1987-10-07 1991-07-26 Masair Ecran anti-eblouissement
FR2632991B1 (fr) * 1988-06-17 1990-11-16 Sodirel Diffusion Rgle Locale Procedes et dispositifs pour fixer des panneaux ou des ecrans sur des glissieres de securite en beton et panneaux ou ecrans correspondants
FR2635345B1 (fr) * 1988-08-09 1992-01-24 Paris Normandie Autoroute Barriere de securite pour la separation de deux voies de circulation en sens contraires avec elements anti-eblouissement
FR2712001B1 (fr) * 1993-11-05 1996-06-07 France Autoroutes Sud Dispositif routier anti-éblouissement, du type comportant une pale, ou écran positionné dans un plan sensiblement vertical.
ES2139058T3 (es) * 1993-11-05 2000-02-01 Sodirel Sa Dispositivo de fijacion de una pala antideslumbramiento sobre una valla metalica de seguridad.

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US2774323A (en) * 1955-05-18 1956-12-18 Everett S Kirk Audio road signal
US3096079A (en) * 1960-01-14 1963-07-02 Winn Henry James Fence panels for roadways
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DE2233994A1 (de) * 1972-07-11 1974-02-07 Schoeller & Co Kg Sichtblendenanordnung fuer blendschutzeinrichtungen
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105780677A (zh) * 2015-12-18 2016-07-20 祝永亮 旋转景观防眩板

Also Published As

Publication number Publication date
EP0102951A4 (de) 1985-09-09
ATE32928T1 (de) 1988-03-15
DE3278213D1 (en) 1988-04-14
WO1983003271A1 (en) 1983-09-29
AU8390782A (en) 1983-10-24
EP0102951A1 (de) 1984-03-21

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