(19)

(11)

EP 0 321 484 A1

(12)

(43) Date of publication: 28.06.1989 Bulletin 1989/26 (21) Application number: 87905630.0 (22) Date of filing: 03.09.1987

(51) International Patent Classification (IPC):  E06B 1/ 56( . ) E04F 21/ 00( . ) B66C 23/ 22( . ) (86) International application number: PCT/GB1987/000606 (87) International publication number: WO 1988/001670 (10.03.1988 Gazette 1988/06)

(84) Designated Contracting States: AT BE CH DE FR IT LI LU NL SE (30) Priority: 06.09.1986 GB 19860021512 13.06.1987 GB 19870013871 (71) Applicant: HARRISON, Alan Malcolm Cumbria LA9 5DE (GB)	(72) Inventor: HARRISON, Alan Malcolm Cumbria LA9 5DE (GB) (74) Representative: Lyons, Andrew John  ROYSTONS Tower Building Water Street Liverpool L3 1BA Liverpool L3 1BA (GB)