(19)

(11)

EP 0 207 971 A1

(12)

(43) Date of publication: 14.01.1987 Bulletin 1987/03 (21) Application number: 86900617.0 (22) Date of filing: 09.01.1986

(51) International Patent Classification (IPC):  F02F 7/ 00( . ) F16J 1/ 14( . ) (86) International application number: PCT/GB1986/000012 (87) International publication number: WO 1986/004128 (17.07.1986 Gazette 1986/17)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 11.01.1985 GB 19850000683 (71) Applicant: The Secretary of State for Trade and Industry in Her Britannic Majesty's Government of the United Kingdom of Great Britain and London SW1H OET (GB)	(72) Inventors: SCOWEN, Geoffrey, David Bridgnorth Shropshire WV15 5NN (GB) HUGHES, Joseph, David, Aled Sandilands Lanarkshire ML11 9TR (GB) CHANDLER, Eric, Frederic Strathaven Lanarkshire ML10 6HD (GB)