Global Patent Index - EP 1477611 B1

EP 1477611 B1 20170125 - Breakaway coupling for roadside appurtenances

Title (en)

Breakaway coupling for roadside appurtenances

Title (de)

Trennkupplung für Strassenrandelemente

Title (fr)

Raccord séparable pour l'équipement routier

Publication

EP 1477611 B1 20170125 (EN)

Application

EP 03011207 A 20030516

Priority

EP 03011207 A 20030516

Abstract (en)

[origin: EP1477611A1] In a breakaway coupling (10) for a highway and roadside appurtenance, a controlled breaking region (14) is provided which has at least two axial spaced necked-down (16,18) portions coaxially arranged between the axial ends (13,13') of the coupling (10) which are configured to be attached both to the appurtenance, at one end, and to the support base (B), at the other end. Each necked-down portion (16,18) essentially consists of two axially aligned conical portions (60,62,64,66) inverted one in relation to the other and generally joined at their apices to form a generally hour-glass configuration having a region of minimal cross section at an inflection point (16',18') having a gradually curved annular concave surface defining a radius of curvature. Each of the two necked-down (16,18) portions has different radii of curvature that at respective inflection points (16',18') to provide preferred failure modes as a function of the position and direction of impact of a force on the appurtenance. The breakaway coupling (10) preferably has a minimum ultimate tensile strength equal to or greater than about 53.8 kN and a minimum ultimate restrained shear strength equal to or greater than about 5.8 kN. The minimum ultimate restrained shear strength of the breakaway coupling (10) is preferably about from about 6% to about 12% of the minimum ultimate tensile strength. <IMAGE>

IPC 8 full level

E01F 9/681 (2016.01); E01F 9/011 (2006.01); E01F 9/018 (2006.01); E01F 9/635 (2016.01)

CPC (source: EP)

E01F 9/635 (2016.02); E01F 9/681 (2016.02)

Citation (examination)

  • ANONYMOUS: "Transpo Safety Division/Pole-Safe/Model 4125", INTERNET CITATION, 19 December 2002 (2002-12-19), pages 1 - 2, XP007922029, Retrieved from the Internet <URL:http://web.archive.org/web/20021219232731/http://transpo.c> [retrieved on 20130625]
  • ANONYMOUS: "Transpo Safety Division/Pole-Safe/Model 4062", INTERNET CITATION, 19 December 2002 (2002-12-19), pages 1, XP007922030, Retrieved from the Internet <URL:http://web.archive.org/web/20021219232418/http://transpo.c> [retrieved on 20130625]
  • TRANSPO: "Pole-Safe Model 4125", 9 September 2003, TRANSPO, 09-09-2003
  • NIAGARA - LA SALLE, INTERNET ARTICLE, Retrieved from the Internet <URL:http://www.niagaralasalle.com/products/ETD.html> [retrieved on 20060131]
  • TRANSPO, Retrieved from the Internet <URL:http://www.transpo.com/Transpo_Sheets_PDF/FHWA2.pdf> [retrieved on 20060130]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 1477611 A1 20041117; EP 1477611 B1 20170125; AU 2004202042 A1 20041202; AU 2004202042 B2 20101125

DOCDB simple family (application)

EP 03011207 A 20030516; AU 2004202042 A 20040514