(19)

(11)

EP 0 516 622 A1

(12)

(43) Date of publication: 09.12.1992 Bulletin 1992/50 (21) Application number: 90916086.0 (22) Date of filing: 28.08.1990

(51) International Patent Classification (IPC):  G21B 1/ 00( . ) G21B 3/ 00( . ) (86) International application number: PCT/US1990/004841 (87) International publication number: WO 1991/006103 (02.05.1991 Gazette 1991/10)

(84) Designated Contracting States: BE CH DE DK ES FR GB IT LI NL SE (30) Priority: 16.10.1989 US 19890421762 (71) Applicant: ZACHARIAH, Chacko P. Fort Lauderdale, FL 33308 (US)	(72) Inventor: ZACHARIAH, Chacko P. Fort Lauderdale, FL 33308 (US) (74) Representative: Jackson, David Spence, et al  REDDIE & GROSE 16, Theobalds Road London, WC1X 8PL London, WC1X 8PL (GB)