(19)

(11)

EP 0 337 992 A1

(12)

(43) Date of publication: 25.10.1989 Bulletin 1989/43 (21) Application number: 87906759.0 (22) Date of filing: 26.10.1987

(51) International Patent Classification (IPC):  B63H 9/ 06( . ) (86) International application number: PCT/GB1987/000754 (87) International publication number: WO 1988/003111 (05.05.1988 Gazette 1988/10)

(84) Designated Contracting States: BE DE FR IT NL SE (30) Priority: 29.10.1986 GB 19860025840 (71) Applicant: BYAM SHAW, James Frederick Maldon Essex CM9 7RW (GB)	(72) Inventor: BYAM SHAW, James Frederick Maldon Essex CM9 7RW (GB) (74) Representative: Holliday, Frank  Marks & Clerk 57-60 Lincoln's Inn Fields London, WC2A 3LS London, WC2A 3LS (GB)