(19)

(11)

EP 0 541 590 A1

(12)

(43) Date of publication: 19.05.1993 Bulletin 1993/20 (21) Application number: 91912953.0 (22) Date of filing: 26.07.1991

(51) International Patent Classification (IPC):  A63H 33/ 28( . ) (86) International application number: PCT/FI1991/000228 (87) International publication number: WO 1992/002281 (20.02.1992 Gazette 1992/05)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 27.07.1990 FI 19900003782 27.07.1990 FI 19900003783 12.03.1991 FI 19910001198 (71) Applicant: PUHAKKA, Aimo Johannes SF-00530 Helsinki (FI)	(72) Inventor: PUHAKKA, Aimo Johannes SF-00530 Helsinki (FI) (74) Representative: Oulton, Richard John  R J Oulton & Co, First Floor, Pearl Assurance Buildings, Land of Green Ginger Hull, Humberside HU1 2EA Hull, Humberside HU1 2EA (GB)