(19)

(11)

EP 0 169 872 A1

(12)

(43) Date of publication: 05.02.1986 Bulletin 1986/06 (21) Application number: 85900713.0 (22) Date of filing: 29.01.1985

(51) International Patent Classification (IPC):  E02D 5/ 80( . ) F16L 1/ 12( . ) (86) International application number: PCT/GB1985/000041 (87) International publication number: WO 1985/003319 (01.08.1985 Gazette 1985/17)

(84) Designated Contracting States: BE DE FR NL SE (30) Priority: 30.01.1984 GB 19840002362 (71) Applicant: Alsop, Peter Ivychurch Kent TN29 OAR (GB)	(72) Inventor: Alsop, Peter Ivychurch Kent TN29 OAR (GB) (74) Representative: Sanders, Peter Colin Christopher, et al  BROOKES & MARTIN High Holborn House 52/54 High Holborn London WC1V 6SE London WC1V 6SE (GB)