(19)

(11)

EP 0 214 224 A1

(12)

(43) Date of publication: 18.03.1987 Bulletin 1987/12 (21) Application number: 86901541.0 (22) Date of filing: 04.02.1986

(51) International Patent Classification (IPC):  E04G 21/ 20( . ) (86) International application number: PCT/SE1986/000044 (87) International publication number: WO 1986/004948 (28.08.1986 Gazette 1986/19)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL (30) Priority: 15.02.1985 SE 19850000711 (71) Applicant: Gauffin, Ulf S-753 25 Uppsala (SE)	(72) Inventor: Gauffin, Ulf S-753 25 Uppsala (SE) (74) Representative: Omming, Allan  STENHAGEN PATENTBYRA AB P.O. Box 4630 S-116 91 Stockholm S-116 91 Stockholm (SE)