(19)

(11)

EP 0 294 373 A1

(12)

(43) Date of publication: 14.12.1988 Bulletin 1988/50 (21) Application number: 87900444.0 (22) Date of filing: 01.12.1986

(51) International Patent Classification (IPC):  F04B 47/ 02( . ) F04B 53/ 12( . ) (86) International application number: PCT/US1986/002581 (87) International publication number: WO 1988/004365 (16.06.1988 Gazette 1988/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicant: BATTELLE DEVELOPMENT CORPORATION Columbus, OH 43201-2693 (US)	(72) Inventors: AMES, Kenneth, R. Pasco, WA 99301 (US) DOESBURG, James, M. Chicago, IL 60611 (US) (74) Representative: Dousse, Blasco, et al  7, route de Drize CH-1227 Carouge/Genève CH-1227 Carouge/Genève (CH)