(19)

(11)

EP 0 205 531 A1

(12)

(43) Date of publication: 30.12.1986 Bulletin 1986/52 (21) Application number: 86900211.0 (22) Date of filing: 17.12.1985

(51) International Patent Classification (IPC):  A61M 1/ 00( . ) G01D 5/ 353( . ) A61M 1/ 36( . ) G01D 5/ 26( . ) G01F 23/ 292( . ) (86) International application number: PCT/GB1985/000589 (87) International publication number: WO 1986/003832 (03.07.1986 Gazette 1986/14)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 17.12.1984 GB 19840031680 (71) Applicant: BELLHOUSE MEDICAL PRODUCTS LIMITED London, EC4R 1BX (GB)	(72) Inventors: BELLHOUSE, Brian, John Oxfordshire (GB) FURNESS, Anthony Croxton, Stafford Staffordshire (GB) PUGH, Sydney, Mervyn Enstone Oxfordshire (GB) WRIGHT, Gordon Market Drayton Shropshire (GB)