(19)

(11)

EP 0 510 020 A1

(12)

(43) Date of publication: 28.10.1992 Bulletin 1992/44 (21) Application number: 91901461.0 (22) Date of filing: 08.01.1991

(51) International Patent Classification (IPC):  B25B 21/ 00( . ) (86) International application number: PCT/AU1991/000005 (87) International publication number: WO 1991/010540 (25.07.1991 Gazette 1991/17)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 09.01.1990 AU 19900008128 (71) Applicant: MATRICBROOK PTY. LTD. Buderim, QLD 4556 (AU)	(72) Inventor: MITCHELL, Peter, Eric Caloundra, QLD 4551 (AU) (74) Representative: March, Gary Clifford  Batchellor, Kirk & Co. 2 Pear Tree Court Farringdon Road London EC1R 0DS London EC1R 0DS (GB)