(19)

(11)

EP 0 108 088 A1

(12)

(43) Date of publication: 16.05.1984 Bulletin 1984/20 (21) Application number: 83901345.0 (22) Date of filing: 25.04.1983

(51) International Patent Classification (IPC):  F04B 43/ 12( . ) (86) International application number: PCT/FI1983/000033 (87) International publication number: WO 1983/003879 (10.11.1983 Gazette 1983/26)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 26.04.1982 FI 19820001438 (71) Applicant: LABSYSTEMS OY SF-00810 Helsinki 81 (FI)	(72) Inventor: EKHOLM, Pertti SF-00550 Helsinki 55 (FI)