(19)

(11)

EP 0 055 731 A1

(12)

(43) Date of publication: 14.07.1982 Bulletin 1982/28 (21) Application number: 81901902.0 (22) Date of filing: 08.07.1981

(51) International Patent Classification (IPC):  E04H 12/ 22( . ) E04H 17/ 20( . ) E04H 17/ 10( . ) (86) International application number: PCT/AU1981/000086 (87) International publication number: WO 1982/000170 (21.01.1982 Gazette 1982/03)

(84) Designated Contracting States: AT CH DE FR LI NL SE (30) Priority: 09.07.1980 AU 19810004448 30.07.1980 AU 19800004776 31.10.1980 AU 19800006310 (71) Applicant: ELLER, Trevor Lyle Stawell, Vic. 3380 (AU)	(72) Inventor: ELLER, Trevor Lyle Stawell, Vic. 3380 (AU)