(19)

(11)

EP 0 697 068 A1

(12)

(43) Date of publication: 21.02.1996 Bulletin 1996/08 (21) Application number: 94910416.0 (22) Date of filing: 14.03.1994

(51) International Patent Classification (IPC):  F04D 29/ 053( . ) F04D 29/ 04( . ) F04D 29/ 66( . ) F04D 19/ 04( . ) F04D 29/ 056( . ) (86) International application number: PCT/EP1994/000785 (87) International publication number: WO 1994/025759 (10.11.1994 Gazette 1994/25)

(84) Designated Contracting States: CH DE FR GB IT LI (30) Priority: 03.05.1993 DE 19934314419 (71) Applicant: LEYBOLD AKTIENGESELLSCHAFT D-63450 Hanau (DE)	(72) Inventor: ENGLÄNDER, Heinrich D-52441 Linnich (DE) (74) Representative: Leineweber, Jürgen, Dipl.-Phys.  Aggerstrasse 24 D-50859 Köln D-50859 Köln (DE)