(19)

(11)

EP 0 429 449 A1

(12)

(43) Date of publication: 05.06.1991 Bulletin 1991/23 (21) Application number: 89903039.0 (22) Date of filing: 09.03.1989

(51) International Patent Classification (IPC):  B23C 3/ 28( . ) F16B 3/ 00( . ) F16B 17/ 00( . ) B24B 19/ 02( . ) F16B 5/ 06( . ) F16B 21/ 09( . ) (86) International application number: PCT/AU1989/000092 (87) International publication number: WO 1989/008788 (21.09.1989 Gazette 1989/23)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 09.03.1988 AU 19880007174 25.08.1988 AU 19880000043 (71) Applicant: ELISCHER, Julius William Nedlands, W.A. 6009 (AU)	(72) Inventor: ELISCHER, Julius William Nedlands, W.A. 6009 (AU) (74) Representative: Pattullo, Norman  Murgitroyd and Company 373 Scotland Street Glasgow G5 8QA Glasgow G5 8QA (GB)