(19)

(11)

EP 0 858 559 A1

(12)

(43) Date of publication: 19.08.1998 Bulletin 1998/34 (21) Application number: 96935148.0 (22) Date of filing: 01.11.1996

(51) International Patent Classification (IPC):  F04B 41/ 06( . ) F04C 28/ 02( . ) F04C 23/ 00( . ) F25B 1/ 10( . ) (86) International application number: PCT/GB1996/002679 (87) International publication number: WO 1997/016649 (09.05.1997 Gazette 1997/20)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 02.11.1995 GB 19950022517 02.11.1995 GB 19950022516 30.05.1996 GB 19960011261 (71) Applicants: Aaf-McQuay Incorporated Baltimore, MD 21202 (US) J. & E. Hall Limited Dartford, Kent DA1 1BU (GB)	(72) Inventors: YOUNG, Terence, William, Thomas Gravesend, Kent DA11 7RN (GB) ROLL, John, Michael Fawkham, Kent DA3 7BQ (GB) (74) Representative: Hanson, William Bennett, et al  J.Y. & G.W. Johnson, Kingsbourne House, 229-231 High Holborn London WC1V 7DP London WC1V 7DP (GB)