(19)

(11)

EP 2 257 678 A1

(12)

(43) Date of publication: 08.12.2010 Bulletin 2010/49 (21) Application number: 08800850.3 (22) Date of filing: 11.09.2008

(51) International Patent Classification (IPC):  E04B 1/38(2006.01) E04B 1/41(2006.01) (86) International application number: PCT/CN2008/072340 (87) International publication number: WO 2009/033429 (19.03.2009 Gazette 2009/12)

(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: 11.09.2007 CN 200710045762 (71) Applicant: Yau, Pak Sum Hong Kong (CN)	(72) Inventor: Yau, Pak Sum Hong Kong (CN) (74) Representative: Jennings, Nigel Robin et al Kilburn & Strode LLP 20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)