(19)

(11)

EP 1 648 571 A2

(12)

(43) Date of publication: 26.04.2006 Bulletin 2006/17 (21) Application number: 04756309.3 (22) Date of filing: 28.06.2004

(51) International Patent Classification (IPC):  A63B 21/008(1990.01) A63B 21/072(1990.01) A63B 23/12(1990.01) A63B 21/06(1968.09) A63B 21/078(1990.01) (86) International application number: PCT/US2004/020797 (87) International publication number: WO 2005/002678 (13.01.2005 Gazette 2005/02)

(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 Designated Extension States: AL HR LT LV MK (30) Priority: 27.06.2003 US 483546 P 27.06.2003 US 483573 P 22.03.2004 US 555577 P 23.03.2004 US 555723 P (71) Applicant: Keiser Corporation Fresno, CA 93706 (US)	(72) Inventors: KEISER, Dennis, L. Sanger, CA 93657 (US) PETERSON, Wade, A. Fresno, CA 93720 (US) (74) Representative: Sternagel, Fleischer, Godemeyer & Partner  Braunsberger Feld 29 51429 Bergisch Gladbach 51429 Bergisch Gladbach (DE)