(19)

(11)

EP 2 310 585 A2

(12)

(88) Date of publication A3: 25.02.2010 (43) Date of publication: 20.04.2011 Bulletin 2011/16 (21) Application number: 09742878.3 (22) Date of filing: 08.05.2009

(51) International Patent Classification (IPC):  E03D 9/08(2006.01) (86) International application number: PCT/KR2009/002451 (87) International publication number: WO 2009/136772 (12.11.2009 Gazette 2009/46)

(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: 09.05.2008 KR 20080043600 (71) Applicant: Woongjin Coway Co., Ltd. Choongcheongnam-do 314-895 (KR)	(72) Inventor: KWON, Sun-Dug Chungcheongnam-do 330-170 (KR) (74) Representative: van Westenbrugge, Andries  Nederlandsch Octrooibureau J.W. Frisolaan 13 2517 JS Den Haag 2517 JS Den Haag (NL)