(19)

(11)

EP 2 337 896 A2

(12)

(88) Date of publication A3: 24.06.2010 (43) Date of publication: 29.06.2011 Bulletin 2011/26 (21) Application number: 09816351.2 (22) Date of filing: 24.08.2009

(51) International Patent Classification (IPC):  E01B 3/00(2006.01) (86) International application number: PCT/KR2009/004699 (87) International publication number: WO 2010/035958 (01.04.2010 Gazette 2010/13)

(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 SM TR Designated Extension States: AL BA RS (30) Priority: 24.09.2008 KR 20080093473 (71) Applicant: Ryu, Bong Su Yongin, Gyeonggi-do 446-953 (KR)	(72) Inventor: Ryu, Bong Su Yongin, Gyeonggi-do 446-953 (KR) (74) Representative: Hocking, Adrian Niall  Albright Patents LLP Eagle Tower Montpellier Drive Cheltenham GL50 1TA Cheltenham GL50 1TA (GB)