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(11)

EP 1 181 496 A1

(12)

(43) Date of publication: 27.02.2002 Bulletin 2002/09 (21) Application number: 00912261.5 (22) Date of filing: 30.03.2000

(51) International Patent Classification (IPC)7: F42B 3/22, F42B 3/087, F42D 1/20, F42D 1/22, F42D 3/04 (86) International application number: PCT/AU0000/265 (87) International publication number: WO 0060/301 (12.10.2000 Gazette 2000/41)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 31.03.1999 US 127463 P 27.12.1999 US 173182 P 07.01.2000 US 175063 P (71) Applicant: Rocktek Ltd. Pinjarra, W.A. 6208 (AU)	(72) Inventors: GAVRILOVIC, Mihailo Denver, CO 80222 (US) MICKE, Brian Golden, CO 80401 (US) (74) Representative: Schmidt, Josef  European Patent Attorney, Vossius & Partner, Siebertstr. 4 81675 München 81675 München (DE)