(19)

(11)

EP 0 457 796 A1

(12)

(43) Date of publication: 27.11.1991 Bulletin 1991/48 (21) Application number: 90902649.0 (22) Date of filing: 07.02.1990

(51) International Patent Classification (IPC):  F01C 11/ 00( . ) F03C 2/ 30( . ) (86) International application number: PCT/GB1990/000183 (87) International publication number: WO 1990/009510 (23.08.1990 Gazette 1990/20)

(84) Designated Contracting States: FR GB (30) Priority: 09.02.1989 GB 19890002838 26.04.1989 GB 19890009503 (71) Applicants: Roe, John Richard Neville Aberdeenshire, Scotland AB5 8PD (GB) VAN DRENTHAM-SUSMAN, Hector Fillipus Alexander Aberdeenshire AB5 8PD (GB) DOUBENMIER, John Edward Aberdeen AB1 7PQ (GB)	(72) Inventors: Roe, John Richard Neville Aberdeenshire, Scotland AB5 8PD (GB) VAN DRENTHAM-SUSMAN, Hector Fillipus Alexander Aberdeenshire AB5 8PD (GB) DOUBENMIER, John Edward Aberdeen AB1 7PQ (GB) (74) Representative: Szczuka, Jan Tymoteusz, et al  Cruikshank & Fairweather 19 Royal Exchange Square Glasgow G1 3AE Scotland Glasgow G1 3AE Scotland (GB)