(19)

(11)

EP 0 809 741 A1

(12)

(43) Date of publication: 03.12.1997 Bulletin 1997/49 (21) Application number: 96934876.0 (22) Date of filing: 04.11.1996

(51) International Patent Classification (IPC):  E04G 23/ 02( . ) (86) International application number: PCT/FI1996/000590 (87) International publication number: WO 1997/018367 (22.05.1997 Gazette 1997/22)

(84) Designated Contracting States: AT BE CH DE DK FI FR GB IT LI NL SE (30) Priority: 15.11.1995 FI 19950005515 (71) Applicant: Haavisto, Juha 04260 Kerava (FI)	(72) Inventor: Haavisto, Juha 04260 Kerava (FI) (74) Representative: Helino, Timo Kalervo, et al  Papula Rein Lahtela Oy, P.O. Box 981 00101 Helsinki 00101 Helsinki (FI)