(19)

(11)

EP 0 968 392 A1

(12)

(43) Date of publication: 05.01.2000 Bulletin 2000/01 (21) Application number: 99901011.9 (22) Date of filing: 19.01.1999

(51) International Patent Classification (IPC)7: F24D 19/00 (86) International application number: PCT/GB9900/038 (87) International publication number: WO 9936/732 (22.07.1999 Gazette 1999/29)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 20.01.1998 GB 9801049 03.09.1998 GB 9819117 (71) Applicants: Vasdev, Anil Gargrave,Skipton BD23 ISU (GB) Robinson, Ian David Barnoldwick BB8 5JH (GB)	(72) Inventors: Vasdev, Anil Gargrave,Skipton BD23 ISU (GB) Robinson, Ian David Barnoldwick BB8 5JH (GB) (74) Representative: Walsh, David Patrick et al Appleyard Lees,15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)