(19)

(11)

EP 0 487 580 A1

(12)

(43) Date of publication: 03.06.1992 Bulletin 1992/23 (21) Application number: 90912319.0 (22) Date of filing: 07.08.1990

(51) International Patent Classification (IPC):  E04C 3/ 29( . ) (86) International application number: PCT/SE1990/000517 (87) International publication number: WO 1991/002865 (07.03.1991 Gazette 1991/06)

(84) Designated Contracting States: BE DE FR GB NL (30) Priority: 14.08.1989 SE 19890002727 (71) Applicant: LARSSON, Björn S-330 27 Hestra (SE)	(72) Inventor: LARSSON, Björn S-330 27 Hestra (SE) (74) Representative: Andersson, Per-Olof, et al  AWAPATENT AB, Box 5117 S-200 71 Malmö S-200 71 Malmö (SE)