(19)

(11)

EP 1 036 253 A1

(12)

(43) Date of publication: 20.09.2000 Bulletin 2000/38 (21) Application number: 98962544.7 (22) Date of filing: 03.12.1998

(51) International Patent Classification (IPC)7: F01C 1/39 (86) International application number: PCT/GB9803/580 (87) International publication number: WO 9930/005 (17.06.1999 Gazette 1999/24)

(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: 05.12.1997 GB 9725675 20.01.1998 GB 9801092 (71) Applicant: Driver Technology Limited Shepshed,Leicestershire LE12 9ZP (GB)	(72) Inventors: DRIVER, Ronald, William Clitheroe,Lancashire BB7 4JY (GB) DRIVER, Ann, Margaret Clitheroe,Lancashire BB7 4JY (GB) (74) Representative: Ajello, Michael John  Urquhart-Dykes & LordGreg's Buildings1 Booth Street Manchester, M2 4DU Manchester, M2 4DU (GB)