(19)

(11)

EP 0 182 845 A1

(12)

(43) Date of publication: 04.06.1986 Bulletin 1986/23 (21) Application number: 85902601.0 (22) Date of filing: 31.05.1985

(51) International Patent Classification (IPC):  E03D 5/ 10( . ) (86) International application number: PCT/GB1985/000233 (87) International publication number: WO 1985/005648 (19.12.1985 Gazette 1985/27)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 31.05.1984 GB 19840013940 21.01.1985 GB 19850001493 (71) Applicant: ROBOTRONICS LIMITED Beverley North Humberside HU17 0EG (GB)	(72) Inventor: BIRD, William, Derek Newark Nottinghamshire NG24 2AQ (GB)