(19)

(11)

EP 0 210 217 A1

(12)

(43) Date of publication: 04.02.1987 Bulletin 1987/06 (21) Application number: 86900822.0 (22) Date of filing: 30.01.1986

(51) International Patent Classification (IPC):  E01H 1/ 04( . ) E02F 3/ 96( . ) (86) International application number: PCT/GB1986/000054 (87) International publication number: WO 1986/004626 (14.08.1986 Gazette 1986/18)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 02.02.1985 GB 19850002714 (71) Applicant: CRAIG, John Quarter Hamilton ML3 7XR (GB)	(72) Inventor: CRAIG, John Quarter Hamilton ML3 7XR (GB) (74) Representative: Arthur, John William, et al  FITZPATRICKS, 4 West Regent Street Glasgow G2 1RS, Scotland Glasgow G2 1RS, Scotland (GB)