(19)

(11)

EP 0 701 642 A1

(12)

(43) Date of publication: 20.03.1996 Bulletin 1996/12 (21) Application number: 94917529.0 (22) Date of filing: 02.06.1994

(51) International Patent Classification (IPC):  E01B 9/ 32( . ) E01B 9/ 42( . ) E01B 3/ 16( . ) E01B 9/ 48( . ) (86) International application number: PCT/CA1994/000303 (87) International publication number: WO 1994/028245 (08.12.1994 Gazette 1994/27)

(84) Designated Contracting States: AT CH DE FR GB IT LI SE (30) Priority: 02.06.1993 GB 19930011396 22.10.1993 US 19930139736 (71) Applicant: IGWEMEZIE, Jude Odihackukwunma Toronto, Ontario M4H 1L7 (CA)	(72) Inventor: IGWEMEZIE, Jude Odihackukwunma Toronto, Ontario M4H 1L7 (CA) (74) Representative: Spoor, Brian  c/o E.N. LEWIS & TAYLOR 144 New Walk Leicester, LE1 7JA Leicester, LE1 7JA (GB)