(19)

(11)

EP 0 697 066 A1

(12)

(43) Date of publication: 21.02.1996 Bulletin 1996/08 (21) Application number: 94915567.0 (22) Date of filing: 02.05.1994

(51) International Patent Classification (IPC):  F04B 9/ 04( . ) F04B 53/ 14( . ) (86) International application number: PCT/EP1994/001384 (87) International publication number: WO 1994/025757 (10.11.1994 Gazette 1994/25)

(84) Designated Contracting States: AT CH DE FR IT LI (30) Priority: 02.05.1993 DE 19934314132 (71) Applicants: SCHWALD, Friedrich D-78315 Radolfzell (DE) SCHWALL, Josef D-73725 Ohmden (DE)	(72) Inventors: SCHWALD, Friedrich D-78315 Radolfzell (DE) SCHWALL, Josef D-73725 Ohmden (DE) (74) Representative: Wallinger, Michael, Dr.-Ing., et al  Wallinger, Kroher & Partner, Bavariaring 20 D-80336 München D-80336 München (DE)