(19)
(11) EP 4 143 420 A1

(12)

(43) Date of publication:
08.03.2023 Bulletin 2023/10

(21) Application number: 21804062.4

(22) Date of filing: 11.05.2021
(51) International Patent Classification (IPC): 
E21D 11/00(2006.01)
E21F 17/00(2006.01)
(52) Cooperative Patent Classification (CPC):
E21F 11/00
(86) International application number:
PCT/TR2021/050459
(87) International publication number:
WO 2021/230848 (18.11.2021 Gazette 2021/46)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 13.05.2020 TR 202007450

(71) Applicant: Yapiray Demiryolu Insaat Sistemleri Sanayi Ve Ticaret Anonim Sirketi
Üsküdar/Istanbul (TR)

(72) Inventors:
  • ÖZDEN, Bayezid
    Üsküdar/ Istanbul (TR)
  • KOÇ, Enver
    Üsküdar/ Istanbul (TR)
  • ÖLÇER, Beyazit
    Üsküdar/ Istanbul (TR)
  • YURDAKUL, Mesut
    Üsküdar/ Istanbul (TR)

(74) Representative: Yamankaradeniz, Kemal 
Destek Patent Inc. Maslak Mah., Büyükdere Cad., No: 243, Kat: 13, Spine Tower, Sariyer,
34485 Istanbul
34485 Istanbul (TR)

   


(54) NEW WALKWAY FOR RAILWAY TUNNELS