(19)

(11)

EP 0 807 226 A1

(12)

(43) Date of publication: 19.11.1997 Bulletin 1997/47 (21) Application number: 95941631.0 (22) Date of filing: 22.11.1995

(51) International Patent Classification (IPC):  F16K 1/ 30( . ) F17C 13/ 04( . ) (86) International application number: PCT/EP1995/004689 (87) International publication number: WO 1996/016290 (30.05.1996 Gazette 1996/25)

(84) Designated Contracting States: CH DE DK ES FR GB GR IT LI LU NL PT (30) Priority: 23.11.1994 EP 19940308670 (71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. 2596 HR Den Haag (NL)	(72) Inventor: TOMSETT, Alan, Clive London SE1 7NA (GB)