(19)

(11)

EP 0 365 548 A1

(12)

(43) Date of publication: 02.05.1990 Bulletin 1990/18 (21) Application number: 88904988.0 (22) Date of filing: 02.06.1988

(51) International Patent Classification (IPC):  F16L 55/ 16( . ) F16L 33/ 06( . ) F16L 55/ 18( . ) F16L 33/ 04( . ) F16L 55/ 165( . ) (86) International application number: PCT/GB1988/000435 (87) International publication number: WO 1988/009897 (15.12.1988 Gazette 1988/27)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 03.06.1987 GB 19870012954 (71) Applicants: HUTTON, Frank Arthur Finham, Coventry CV3 6EH (GB) BEECH, Ronald Charles Thomas Coventry CV4 7AH (GB)	(72) Inventors: HUTTON, Frank Arthur Finham, Coventry CV3 6EH (GB) BEECH, Ronald Charles Thomas Coventry CV4 7AH (GB) (74) Representative: Jones, David Bryn  Eaton Lodge Coventry Road Kenilworth CV8 2FU Kenilworth CV8 2FU (GB)