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Flexible tensioned crash barrier

a crash barrier and flexible technology, applied in roadway safety arrangements, roads, construction, etc., can solve the problems of rider injuries, rigid and semi-rigid crash barriers may be more expensive to install and manufacture compared to flexible crash barriers

Pending Publication Date: 2022-07-21
HUDSON DAVID MARSHALL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a flexible strap that can be easily collapsed to prevent vehicles from rolling over. This strap is designed to be low in stiffness and can maintain tension even when not fully extended. This system helps to reduce the height of the road barrier and end anchor, making it more effective in preventing accidents.

Problems solved by technology

In operation, the upright may provide strong resistance to longitudinal movement (vertical) of the barrier wires, but weak resistance to the lateral (side) impact from an errant vehicle.
Flexible wire rope barriers may be dangerous for motorcycle users and cycle users (riders).
This may lead to rider injuries.
However, rigid and semi-rigid crash barriers may be more expensive to install and manufacture compared to flexible crash barriers.
A person skilled in the art of crash barriers will be aware that semi-rigid or rigid crash barriers can reduce the injury level to motorcyclists, however, rigid solutions are not as cost-effective as flexible tensioned crash barriers.
Semi-rigid or rigid crash barriers may not always be a viable option for some roads.

Method used

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  • Flexible tensioned crash barrier

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

End Anchor—First Embodiment

[0377]The end anchor 900 may be described as including the support arrangements 70 that affix to a ground plate 901, as well as ancillary features such as tensioning arrangements etc. In other embodiments, there is no ground plate 901 or base.

[0378]In one embodiment, as shown in FIGS. 23 to 27, and described at the beginning of this specification, an end anchor may comprise multiple (at least two) support arrangements 970. At least one support arrangement 970 has an upper region 996 with an upper mount 990 is location, and at least one support arrangement 970 has a lower region 994 where a lower mount 991 is location. One or more, preferably two, tensile members 980 extend between these two mounts. The tensile members 980 can be tensioned by fastening means at one or both of their respective upper end 981 and lower end 982. The tensile members 980 are configured to redirect the tensile forces from the straps 22 to the lower region 994 nearer more the groun...

second embodiment

End Anchor—Second Embodiment

[0399]In order to comply with the current AASHTO MASH American standard used by New Zealand and Australia, a crash barrier system that is impacted end on by a misdirected vehicle, the system must not cause the roll over by the test vehicle. This may be by accelerating the vehicle vertically. By snagging the vehicle, causing it to yaw and then roll. For a low cost barrier system it is preferable that in the worst case, a vehicle (one of light weight 1100 kg) proceeds through the anchor without roll or redirection.

[0400]In order to meet the current requirements of New Zealand and Australian authorities (not the AASHTO standard), it is desirable that after an impact collapsing an end terminal, that the barrier system (which may be one kilometre long remains) in position and remains functional of at least much of its length. It is acceptable that the barrier is no longer pretensioned, but the ends remain securely held.

[0401]It is also currently desirable to N...

third embodiment

End Anchor—Third Embodiment

[0438]A preferred embodiment of an end anchor 1000 will now be described with reference to FIGS. 36 to 45D which reference the following reference numerals:[0439]1000—End Anchor[0440]1010 Support post[0441]1011 Base hinge[0442]1012 Bracing element hinge[0443]1013 Flexible member supports[0444]1020 Trigger post[0445]1021 Trigger hinge[0446]1022 Actuator catch[0447]1023 Trigger flanges[0448]1024 Lower end[0449]1025 Upper end[0450]1030 Actuator[0451]1031 Actuator trigger end[0452]1032 Actuator cam end[0453]1033 Main portion[0454]1040 Bracing arrangement[0455]1041 Bracing element[0456]1042 Support post hinge[0457]1043 Cam end hinge[0458]1050 Cam arrangement[0459]1051 Cam hinge[0460]1052 Cam flange[0461]1053 Flange slot[0462]1054 Flange surface[0463]1055 Actuator receiver[0464]1056 Bracing slots[0465]1060 Support unit[0466]1061 Anchors[0467]1062 Plate[0468]1063 Inverted channel[0469]1064 Plate slots[0470]1065 Flexible member mounts

[0471]This preferred embodimen...

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PUM

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Abstract

A roadside crash barrier configured for deflecting errant vehicles towards the road. The barrier comprising at least one tensioned flexible strap comprising a planar face facing the road in use. Compared to prior art systems, the present invention reduces the chances of injury to motorcyclists, as well as being fast and easy to install. A collapsible end anchor for holding the tension of the straps is also described herein, where the end anchor is configured to reduce vehicle rollover should end on impact occur whilst still retaining the effectiveness of the retained road barrier.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation-in-part of, claims priority to, and claims the benefit of, PCT Application No. PCT / IB2020 / 059484 filed on Oct. 9, 2020, which claims priority to New Zealand Application No. NZ 757996 filed on Oct. 9, 2019, and New Zealand Application No. NZ 764015 filed on Apr. 29, 2020, the contents of each are hereby incorporated herein by their entireties.FIELD OF THE INVENTION[0002]The present invention relates to a flexible tensioned crash barrier and end anchors for said flexible tensioned crash barrier and / or for a road crash barrier. More particularly but not exclusively it relates to a crash barrier for roadside use that utilises a flexible strap under tension that has a planar surface facing the road.BACKGROUND[0003]Flexible tensioned wire rope barriers have been used for many years as an economical solution for road safety. They are typically used on the side of, or in between, lanes of a road. If an errant veh...

Claims

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Application Information

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IPC IPC(8): E01F15/06E01F15/14
CPCE01F15/06E01F15/146E01F15/143E01F15/025
Inventor HUDSON, DAVID MARSHALL
Owner HUDSON DAVID MARSHALL
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