(19)

(11)

EP 0 390 894 A1

(12)

(43) Date of publication: 10.10.1990 Bulletin 1990/41 (21) Application number: 89910896.0 (22) Date of filing: 26.09.1989

(51) International Patent Classification (IPC):  F16H 25/ 24( . ) F16J 15/ 16( . ) (86) International application number: PCT/GB1989/001136 (87) International publication number: WO 1990/003530 (05.04.1990 Gazette 1990/08)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 29.09.1988 GB 19880022848 28.03.1989 GB 19890006985 (71) Applicant: DOWTY SEALS LIMITED Tewkesbury Gloucestershire GL20 8JS (GB)	(72) Inventor: SMITH, Robert, Miles Cheltenham Gloucestershire GL52 4AD (GB) (74) Representative: Chapple, Colin Richard  Dowty Group Services Ltd. Patents Dept. Arle Court Cheltenham, Glos. GL51 0TP Cheltenham, Glos. GL51 0TP (GB)