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EP 2 021 668 A1

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(43) Date of publication: 11.02.2009 Bulletin 2009/07 (21) Application number: 07715414.4 (22) Date of filing: 27.02.2007

(51) International Patent Classification (IPC):  F16L 3/00(2006.01) (86) International application number: PCT/KR2007/001003 (87) International publication number: WO 2008/093906 (07.08.2008 Gazette 2008/32)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 29.01.2007 KR 20070008997 (71) Applicants: Extec Co., Ltd. Songpa-gu Seoul 138-120 (KR) Oh, Hyun Jin Gyeonggi-do 480-714 (KR)	(72) Inventor: OH, Hyun Jin Uijeongbu-city, Gyeonggi-do 480-090 (KR) (74) Representative: Roos, Peter et al Klinger & Kollegen Bavariaring 20 80336 München 80336 München (DE)