(19)

(11)

EP 1 670 555 A1

(12)

(43) Date of publication: 21.06.2006 Bulletin 2006/25 (21) Application number: 04768439.4 (22) Date of filing: 10.09.2004

(51) International Patent Classification (IPC):  A63B 53/04(1968.09) (86) International application number: PCT/GB2004/003892 (87) International publication number: WO 2005/023379 (17.03.2005 Gazette 2005/11)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 11.09.2003 GB 0321316 (71) Applicant: Spherical Blade Limited 21 Longtown Grove Newport NP10 8HD (GB)	(72) Inventor: THOM, Ivor, Wallace Caerleon Newport NP18 3SU (GB) (74) Representative: Bardo, Julian Eason et al Abel & Imray 20 Red Lion Street London WC1R 4PQ London WC1R 4PQ (GB)