(19)

(11)

EP 1 488 057 A1

(12)

(43) Date of publication: 22.12.2004 Bulletin 2004/52 (21) Application number: 03719998.1 (22) Date of filing: 28.02.2003

(51) International Patent Classification (IPC)7: E04H 4/16 (86) International application number: PCT/ZA2003/000035 (87) International publication number: WO 2003/078764 (25.09.2003 Gazette 2003/39)

(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 PT SE SI SK TR Designated Extension States: AL LT LV MK RO (30) Priority: 15.03.2002 US 364680 P 19.06.2002 US 390429 P (71) Applicant: Grobler, Johannes Stephanus Pretoria north,182 Gauteng Province (ZA)	(72) Inventor: Grobler, Johannes Stephanus Pretoria north,182 Gauteng Province (ZA) (74) Representative: Jostarndt, Hans-Dieter, Dr. Dipl.-Phys.  Brüsseler Ring 51 52074 Aachen 52074 Aachen (DE)