(19)

(11)

EP 0 176 584 A1

(12)

(43) Date of publication: 09.04.1986 Bulletin 1986/15 (21) Application number: 85902071.0 (22) Date of filing: 17.04.1985

(51) International Patent Classification (IPC):  A61M 5/ 142( . ) F04B 43/ 02( . ) F04B 17/ 04( . ) (86) International application number: PCT/GB1985/000169 (87) International publication number: WO 1985/004813 (07.11.1985 Gazette 1985/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 17.04.1984 GB 19840009927 (71) Applicant: THE UNIVERSITY OF ST. ANDREWS, UINVERSITY COURT St Andrews, Fife KY16 9AJ, Scotland (GB)	(72) Inventors: SHEPHERD, Thomas, Maurice Cupar KY15 4HG (GB) VINCENT, Colin, Angus Newport-on-Tay DD6 8DQ (GB) RENNIE, James St Andrews, Fife KY16 8SE (GB) (74) Representative: Wotherspoon, Graham  FITZPATRICKS 4 West Regent Street Glasgow G2 1RS Scotland Glasgow G2 1RS Scotland (GB)