(19)

(11)

EP 0 389 480 A1

(12)

(43) Date of publication: 03.10.1990 Bulletin 1990/40 (21) Application number: 88907530.0 (22) Date of filing: 05.11.1987

(51) International Patent Classification (IPC):  F16K 31/ 06( . ) (86) International application number: PCT/US1987/002947 (87) International publication number: WO 1989/004427 (18.05.1989 Gazette 1989/11)

(84) Designated Contracting States: DE FR GB IT SE (71) Applicant: DETROIT COIL COMPANY Ferndale, MI 48220 (US)	(72) Inventor: DETROIT COIL COMPANY Ferndale, MI 48220 (US) (74) Representative: Lemke, Jörg-Michael, Dipl.-Ing.  Schmiedstrasse 1, Hausen D-86447 Aindling D-86447 Aindling (DE)