(19)

(11)

EP 0 041 509 A1

(12)

(43) Date of publication: 16.12.1981 Bulletin 1981/50 (21) Application number: 80902270.0 (22) Date of filing: 24.11.1980

(51) International Patent Classification (IPC):  A63B 21/ 008( . ) (86) International application number: PCT/AU1980/000099 (87) International publication number: WO 1981/001662 (25.06.1981 Gazette 1981/15)

(84) Designated Contracting States: FR (30) Priority: 14.12.1979 AU 19790001725 13.02.1980 AU 19800002336 (71) Applicant: LEWIS, Robert Harrison Mulgrave Melbourne, Vic. 3170 (AU)	(72) Inventor: LEWIS, Robert Harrison Mulgrave Melbourne, Vic. 3170 (AU)