(19)

(11)

EP 0 803 013 A1

(12)

(43) Date of publication: 29.10.1997 Bulletin 1997/44 (21) Application number: 96900222.0 (22) Date of filing: 15.01.1996

(51) International Patent Classification (IPC):  E01B 3/ 16( . ) E01B 9/ 40( . ) E01B 9/ 34( . ) E01B 9/ 48( . ) (86) International application number: PCT/CA1996/000021 (87) International publication number: WO 1996/023107 (01.08.1996 Gazette 1996/35)

(84) Designated Contracting States: AT CH DE FR GB IT LI SE (30) Priority: 13.01.1995 GB 19950000700 06.03.1995 CA 19952144018 07.11.1995 CA 19952162349 01.12.1995 US 19950566327 (71) Applicant: Igwemezie, Jude Odihachukwunma Markham, Ontario L3R 3W5 (CA)	(72) Inventor: Igwemezie, Jude Odihachukwunma Markham, Ontario L3R 3W5 (CA) (74) Representative: Spoor, Brian, et al  c/o E.N. LEWIS & TAYLOR 144 New Walk Leicester, LE1 7JA Leicester, LE1 7JA (GB)