(19)

(11)

EP 0 065 955 A1

(12)

(43) Date of publication: 08.12.1982 Bulletin 1982/49 (21) Application number: 81902572.0 (22) Date of filing: 01.09.1981

(51) International Patent Classification (IPC):  F04B 37/ 10( . ) (86) International application number: PCT/SE1981/000245 (87) International publication number: WO 1982/000858 (18.03.1982 Gazette 1982/08)

(84) Designated Contracting States: DE FR (30) Priority: 02.09.1980 SE 19800006128 (71) Applicant: FROSTENSON, Bertil S-302 31 Halmstad (SE)	(72) Inventor: FROSTENSON, Bertil S-302 31 Halmstad (SE) (74) Representative: Roth, Ernst Adolf Michael  GÖTEBORGS PATENTBYRA AB Box 5005 S-402 21 Göteborg S-402 21 Göteborg (SE)