(19)
(11) EP 2 226 426 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.01.2014 Bulletin 2014/01

(43) Date of publication A2:
08.09.2010 Bulletin 2010/36

(21) Application number: 09380067.0

(22) Date of filing: 02.04.2009
(51) International Patent Classification (IPC): 
E01B 7/20(2006.01)
 E01B 7/22(2006.01)
(84) Designated Contracting States:
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 SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 06.03.2009 ES 200900638

(71) Applicant: Desarrollos y Fabricación, DYF S.A.
28330 San Martin de la Vega - Madrid (ES)

(72) Inventors:
  • Fernandez Sanchez, Cesar
    28330 San Martin de la Vega - Madrid (ES)
  • Blanco Belda, Luis
    28330 San Martin de la Vega - Madrid (ES)

(74) Representative: Ungria López, Javier et al
c/o UNGRIA Patentes y Marcas, S.A., Avda. Ramon y Cajal, 78
28043 Madrid
28043 Madrid (ES)

   


(54) Covering for railroad switch mechanisms in hollow sleepers and fabrication method thereof


(57) Covering for railroad switch mechanisms in hollow sleepers and fabrication method thereof which comprises a reinforced piece (1), with variable shapes and dimensions, made of impact-modified polyamide plastic, with thermoplastic rubber, UV additives and carbon black, having an inverted U-shaped configuration, which determines a central core (2), where longitudinal and transverse reinforcing ribs (5) and lateral supporting wings (4) are incorporated. Plural eccentric holes (8) are made at the lateral supporting wings (4) to facilitate the assembly, as well as plural accommodations (9), adapted and marked according to the needs of each case, for the settlement of the retaining pins during the railroad maintenance works. Some piece (1) generic types are fabricated via injection moulding, these being subsequently cut to measure and made by interchange of elements in the injection moulding.










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Search report