(19)

(11)

EP 0 578 789 A1

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(43) Date of publication: 19.01.1994 Bulletin 1994/03 (21) Application number: 92921494.0 (22) Date of filing: 30.09.1992

(51) International Patent Classification (IPC):  E06B 3/ 263( . ) (86) International application number: PCT/SE1992/000682 (87) International publication number: WO 1993/007350 (15.04.1993 Gazette 1993/10)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL SE (30) Priority: 09.10.1991 SE 19910002926 (71) Applicant: H-FONSTRET LYSEKIL AB S-453 00 Lysekil (SE)	(72) Inventors: FALK, Ingemar S-451 73 Uddevalla (SE) CARLSSON, Tomas S-450 74 Bovallstrand (SE) (74) Representative: Rackette, Karl, Dipl.-Phys. Dr.-Ing  Postfach 1310 D-79013 Freiburg D-79013 Freiburg (DE)