(19)

(11)

EP 0 464 026 A1

(12)

(43) Date of publication: 08.01.1992 Bulletin 1992/02 (21) Application number: 90900933.0 (22) Date of filing: 20.12.1989

(51) International Patent Classification (IPC):  F03B 17/ 02( . ) (86) International application number: PCT/GB1989/001521 (87) International publication number: WO 1990/007058 (28.06.1990 Gazette 1990/15)

(84) Designated Contracting States: AT BE CH DE ES FR IT LI LU NL SE (30) Priority: 21.12.1988 GB 19880029822 (71) Applicant: ISAAC, Felix London E7 9EH (GB)	(72) Inventor: ISAAC, Felix London E7 9EH (GB)