(19)

(11)

EP 0 476 019 A1

(12)

(43) Date of publication: 25.03.1992 Bulletin 1992/13 (21) Application number: 90909345.0 (22) Date of filing: 06.06.1990

(51) International Patent Classification (IPC):  F01N 13/ 18( . ) F16L 27/ 04( . ) (86) International application number: PCT/GB1990/000875 (87) International publication number: WO 1990/015229 (13.12.1990 Gazette 1990/28)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 09.06.1989 GB 19890013266 (71) Applicant: BIRCH, Fred Parker Over Whitacre B46 2NH (GB)	(72) Inventor: BIRCH, Fred Parker Over Whitacre B46 2NH (GB) (74) Representative: Gee, David William  Farmhouse Court Marston Nr. Sutton Coldfield West Midlands B76 0DW Marston Nr. Sutton Coldfield West Midlands B76 0DW (GB)