(19)

(11)

EP 0 435 945 A1

(12)

(43) Date of publication: 10.07.1991 Bulletin 1991/28 (21) Application number: 89911288.0 (22) Date of filing: 13.10.1989

(51) International Patent Classification (IPC):  F16L 55/ 165( . ) F16L 55/ 18( . ) (86) International application number: PCT/GB1989/001211 (87) International publication number: WO 1990/004737 (03.05.1990 Gazette 1990/10)

(84) Designated Contracting States: GB (30) Priority: 20.10.1988 GB 19880024523 (71) Applicant: HUTTON, Frank Arthur Finham, Coventry CV3 6EH (GB)	(72) Inventor: HUTTON, Frank Arthur Finham, Coventry CV3 6EH (GB) (74) Representative: Jones, David Bryn  Eaton Lodge Coventry Road Kenilworth CV8 2FU Kenilworth CV8 2FU (GB)