(19)

(11)

EP 0 489 764 A1

(12)

(43) Date of publication: 17.06.1992 Bulletin 1992/25 (21) Application number: 90912137.0 (22) Date of filing: 21.08.1990

(51) International Patent Classification (IPC):  A47G 27/ 04( . ) E04B 2/ 82( . ) E04B 2/ 78( . ) E04F 19/ 04( . ) (86) International application number: PCT/CA1990/000268 (87) International publication number: WO 1991/002857 (07.03.1991 Gazette 1991/06)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 22.08.1989 US 19890396971 (71) Applicants: GREENWOOD, Frank D. Toronto, Ontario M4P 2A5 (CA) KOBIELSKI, Kazimir Toronto, Ontario M4J 4G5 (CA)	(72) Inventors: GREENWOOD, Frank D. Toronto, Ontario M4P 2A5 (CA) KOBIELSKI, Kazimir Toronto, Ontario M4J 4G5 (CA) (74) Representative: Pacitti, Pierpaolo A.M.E.  Murgitroyd and Company 373 Scotland Street Glasgow G5 8QA Glasgow G5 8QA (GB)