(19)

(11)

EP 2 315 879 A1

(12)

(43) Date of publication: 04.05.2011 Bulletin 2011/18 (21) Application number: 09757676.3 (22) Date of filing: 03.06.2009

(51) International Patent Classification (IPC):  E02B 3/02(2006.01) (86) International application number: PCT/FI2009/050472 (87) International publication number: WO 2009/147298 (10.12.2009 Gazette 2009/50)

(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: 05.06.2008 FI 20085555 (71) Applicant: Turun Ammattikorkeakoulu 20521 Turku (FI)	(72) Inventor: LEHTONEN, Jouko FI-20100 Turku (FI) (74) Representative: Suominen, Kaisa Liisa  Turun Patenttitoimisto Oy P.O.Box 99 20521 Turku 20521 Turku (FI)