(19)

(11)

EP 1 733 101 A2

(12)

(88) Date of publication A3: 20.10.2005 (43) Date of publication: 20.12.2006 Bulletin 2006/51 (21) Application number: 05711149.4 (22) Date of filing: 25.02.2005

(51) International Patent Classification (IPC):  E04B 1/94(2006.01) A62C 35/62(2006.01) (86) International application number: PCT/SE2005/000289 (87) International publication number: WO 2005/081651 (09.09.2005 Gazette 2005/36)

(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 MC NL PL PT RO SE SI SK TR (30) Priority: 26.02.2004 SE 0400462 (71) Applicant: Engwall, Sten 114 75 Stockholm (SE)	(72) Inventors: ENGWALL, Sten S-114 75 Stockholm (SE) ENGVALL, Per- Åke S-195 92 Märsta (SE) (74) Representative: Karlsson, Leif Karl Gunnar  Groth & Co. KB Box 6107 102 32 Stockholm 102 32 Stockholm (SE)