(19)

(11)

EP 0 819 216 A1

(12)

(43) Date of publication: 21.01.1998 Bulletin 1998/04 (21) Application number: 96904924.0 (22) Date of filing: 04.03.1996

(51) International Patent Classification (IPC):  F03B 17/ 04( . ) (86) International application number: PCT/GB1996/000479 (87) International publication number: WO 1996/031696 (10.10.1996 Gazette 1996/45)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 04.04.1995 GB 19950006901 (71) Applicants: McGowan, Derrick Vincent Stourbridge, West Midlands DY8 3XU (GB) Westwood, Diana Eva Stourbridge, West Midlands DY8 3XU (GB)	(72) Inventors: McGowan, Derrick Vincent Stourbridge, West Midlands DY8 3XU (GB) Westwood, Diana Eva Stourbridge, West Midlands DY8 3XU (GB) (74) Representative: Mosey, Stephen George, et al  MARKS & CLERK Alpha Tower Suffolk Street Queensway Birmingham B1 1TT Birmingham B1 1TT (GB)