(19)

(11)

EP 0 563 035 A1

(12)

(43) Date of publication: 06.10.1993 Bulletin 1993/40 (21) Application number: 91900301.0 (22) Date of filing: 23.11.1990

(51) International Patent Classification (IPC):  B66B 9/ 00( . ) (86) International application number: PCT/GB1990/001818 (87) International publication number: WO 1991/008161 (13.06.1991 Gazette 1991/13)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 30.11.1989 GB 19890027129 (71) Applicants: PA Consulting Services Limited London SW1W 9SR (GB) PLUMMER, Dexter Robert Bishops Stortford, Hertfordshire CM23 5RE (GB)	(72) Inventor: PLUMMER, Dexter, Robert Bishops Stortford Hertfordshire CM23 5RE (GB) (74) Representative: Nash, Keith Wilfrid, et al  KEITH W. NASH & Co. Pearl Assurance House 90-92 Regent Street Cambridge CB2 1DP Cambridge CB2 1DP (GB)