(19)

(11)

EP 2 260 163 A1

(12)

(43) Date of publication: 15.12.2010 Bulletin 2010/50 (21) Application number: 09728274.3 (22) Date of filing: 31.03.2009

(51) International Patent Classification (IPC):  E04G 21/18(2006.01) (86) International application number: PCT/SE2009/050334 (87) International publication number: WO 2009/123554 (08.10.2009 Gazette 2009/41)

(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: 31.03.2008 SE 0800706 (71) Applicant: Bretools AB Nyåker 121 740 46 Östervåla (SE)	(72) Inventors: PERSSON, Valdemar S-177 39 Järfälla (SE) WENGRUD, Kjell S-740 46 Östervåla (SE) (74) Representative: Nikolopoulou, Sofia  Albihns.Zacco AB Patent Department P.O. Box 5581 114 85 Stockholm 114 85 Stockholm (SE)