(19)

(11)

EP 0 527 841 A1

(12)

(43) Date of publication: 24.02.1993 Bulletin 1993/08 (21) Application number: 91908977.0 (22) Date of filing: 13.05.1991

(51) International Patent Classification (IPC):  F04D 27/ 02( . ) (86) International application number: PCT/GB1991/000756 (87) International publication number: WO 1991/018208 (28.11.1991 Gazette 1991/27)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 11.05.1990 GB 19900010589 (71) Applicant: M & Y AIR SYSTEMS LIMITED Twickenham, Middlesex TW1 1DN (GB)	(72) Inventor: SEXTON, Michael Twickenham Middlesex TW1 1DN (GB) (74) Representative: Luckhurst, Anthony Henry William, et al  MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)