(19)

(11)

EP 0 020 422 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 79901198.0 (22) Date of filing: 20.09.1979

(51) International Patent Classification (IPC):  B60H 1/ 20( . ) (86) International application number: PCT/SE1979/000193 (87) International publication number: WO 1980/000678 (17.04.1980 Gazette 1980/08)

(84) Designated Contracting States: FR (30) Priority: 22.09.1978 SE 19780009973 (71) Applicant: BLACKSTONE TERMOFROST AB S-294 01 Sölvesborg (SE)	(72) Inventor: SELLIN, Gunnar S-191 43 Sollentuna (SE)