(19)

(11)

EP 2 665 528 A1

(12)

(43) Date of publication: 27.11.2013 Bulletin 2013/48 (21) Application number: 11808387.2 (22) Date of filing: 16.12.2011

(51) International Patent Classification (IPC):  A63B 41/08(2006.01) (86) International application number: PCT/PT2011/000045 (87) International publication number: WO 2012/091592 (05.07.2012 Gazette 2012/27)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 27.12.2010 PT 2010105457 (71) Applicant: Instituto Superior Técnico 1049-001 Lisboa (PT)	(72) Inventor: RUA, Maria Helena Neves Pereira Ramalho P-2780-090 Oeiras (PT) (74) Representative: Pereira da Cruz, Joao  J. Pereira da Cruz, S.A. Rua Victor Cordon, 14 1249-103 Lisboa 1249-103 Lisboa (PT)