(19)

(11)

EP 2 227 410 A2

(12)

(88) Date of publication A3: 17.09.2009 (43) Date of publication: 15.09.2010 Bulletin 2010/37 (21) Application number: 08857906.5 (22) Date of filing: 05.12.2008

(51) International Patent Classification (IPC):  B61G 11/14(2006.01) B61G 11/16(2006.01) (86) International application number: PCT/KR2008/007222 (87) International publication number: WO 2009/072843 (11.06.2009 Gazette 2009/24)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 06.12.2007 KR 20070126334 06.12.2007 KR 20070126361 (71) Applicant: Korea Railroad Research Institute Uiwang 437-050 (KR)	(72) Inventors: KWON, Tae-Su Suwon-city Gyeonggi-do 443-707 (KR) JUNG, Hyun-Seung Yongin-city Gyeonggi-do 446-938 (KR) CHOI, Won-Mok Suwon-city Gyeonggi-do 440-330 (KR) (74) Representative: Petraz, Davide Luigi et al GLP Srl Piazzale Cavedalis, 6/2 33100 Udine 33100 Udine (IT)