(19)

(11)

EP 0 318 494 A1

(12)

(43) Date of publication: 07.06.1989 Bulletin 1989/23 (21) Application number: 87905243.0 (22) Date of filing: 13.08.1987

(51) International Patent Classification (IPC):  E04B 1/ 24( . ) E04B 2/ 78( . ) E04B 2/ 72( . ) E04D 3/ 08( . ) (86) International application number: PCT/GB1987/000572 (87) International publication number: WO 1988/001324 (25.02.1988 Gazette 1988/05)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 15.08.1986 GB 19860019955 (71) Applicant: DUNHILL, John Vernon Newton Ferrers, Plymouth PL8 1HT (GB)	(72) Inventor: DUNHILL, John Vernon Newton Ferrers, Plymouth PL8 1HT (GB) (74) Representative: Harrison, Ivor Stanley  Withers & Rogers 4 Dyer's Buildings Holborn London EC1N 2JT London EC1N 2JT (GB)