(19)

(11)

EP 1 737 577 A2

(12)

(88) Date of publication A3: 17.11.2005 (43) Date of publication: 03.01.2007 Bulletin 2007/01 (21) Application number: 05726183.6 (22) Date of filing: 20.01.2005

(51) International Patent Classification (IPC):  B02C 19/06(2006.01) B02C 25/00(2006.01) F04D 29/30(2006.01) B02C 19/18(2006.01) B02C 23/04(2006.01) F04D 29/28(2006.01) F26B 17/10(2006.01) B02C 23/08(2006.01) (86) International application number: PCT/ZA2005/000006 (87) International publication number: WO 2005/089947 (29.09.2005 Gazette 2005/39)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR LV MK YU (30) Priority: 23.03.2004 GB 0406494 (71) Applicants: Graham, William Gordon's Bay 7150 (ZA) New, Levi Kalamazoo, MI 49024 (US) CASE, Wayne Arthur Portland, OR 97809 (US)	(72) Inventors: Graham, William Gordon's Bay 7150 (ZA) New, Levi Kalamazoo, MI 49024 (US) CASE, Wayne Arthur Portland, OR 97809 (US) (74) Representative: Bird, Ariane  Bird Goën & Co. Klein Dalenstraat 42A 3020 Winksele 3020 Winksele (BE)