(19)

(11)

EP 0 670 010 A1

(12)

(43) Date of publication: 06.09.1995 Bulletin 1995/36 (21) Application number: 91919126.0 (22) Date of filing: 18.11.1991

(51) International Patent Classification (IPC):  F04B 13/ 02( . ) (86) International application number: PCT/FI1991/000341 (87) International publication number: WO 1993/010352 (27.05.1993 Gazette 1993/13)

(84) Designated Contracting States: DE FR GB IT SE (71) Applicant: PIRHONEN, Tauno SF-33270 Tampere (FI)	(72) Inventor: PIRHONEN, Tauno SF-33270 Tampere (FI) (74) Representative: Nyberg, Bengt, et al  CARMINGER, UUSITALO & NYBERG Patentbyra AB P.O. Box 7274 S-103 89 Stockholm S-103 89 Stockholm (SE)