(19)

(11)

EP 0 101 689 A1

(12)

(43) Date of publication: 07.03.1984 Bulletin 1984/10 (21) Application number: 83900410.0 (22) Date of filing: 27.01.1983

(51) International Patent Classification (IPC):  G05D 7/ 06( . ) A61M 5/ 168( . ) A61M 5/ 14( . ) A61M 5/ 172( . ) (86) International application number: PCT/AU1983/000012 (87) International publication number: WO 1983/002561 (04.08.1983 Gazette 1983/18)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 27.01.1982 AU 19820002456 (71) Applicants: AUSTIN, George Alfred Braisby Noble Park, VIC 3174 (AU) PARKIN, William Geoffrey Canterbury, VIC 3126 (AU)	(72) Inventors: AUSTIN, George Alfred Braisby Noble Park, VIC 3174 (AU) PARKIN, William Geoffrey Canterbury, VIC 3126 (AU) (74) Representative: Stanley, David William  APPLEYARD LEES & CO. 15 Clare Road Halifax West Yorkshire HX1 2HY West Yorkshire HX1 2HY (GB)