(19)

(11)

EP 0 948 722 A1

(12)

(43) Date of publication: 13.10.1999 Bulletin 1999/41 (21) Application number: 98901178.0 (22) Date of filing: 06.01.1998

(51) International Patent Classification (IPC):  F16L 27/ 12( . ) F16L 11/ 12( . ) F01N 13/ 18( . ) F16L 27/ 111( . ) (86) International application number: PCT/US1998/000122 (87) International publication number: WO 1998/030824 (16.07.1998 Gazette 1998/28)

(84) Designated Contracting States: BE DE ES FR GB IT LU NL SE (30) Priority: 06.01.1997 US 19970779165 (71) Applicants: Davey, Mark John North Aurora, IL 60542 (US) Rakovic, John Palos Hills, IL 60465 (US)	(72) Inventors: DAVEY, Mark John North Aurora Il 60542 (US) Rakovic, John Palos Hills, Il 60465 (US) (74) Representative: Loveless, Ian Mark, et al  Reddie & Grose, 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)