(19)

(11)

EP 2 451 540 A1

(12)

(43) Date of publication: 16.05.2012 Bulletin 2012/20 (21) Application number: 09847165.9 (22) Date of filing: 07.07.2009

(51) International Patent Classification (IPC):  A63B 23/00(2006.01) (86) International application number: PCT/US2009/003963 (87) International publication number: WO 2011/005243 (13.01.2011 Gazette 2011/02)

(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 SM TR (71) Applicants: Benjamin, Scott J. Perry, MI 48872 (US) Bechtel, Roy H. Columbia, MD 21044 (US)	(72) Inventors: Benjamin, Scott J. Perry, MI 48872 (US) Bechtel, Roy H. Columbia, MD 21044 (US) (74) Representative: Sewell, Adrian David  Murgitroyd & Company 165-169 Scotland Street Glasgow, Strathclyde G5 8PL Glasgow, Strathclyde G5 8PL (GB)