(19)

(11)

EP 0 495 954 A1

(12)

(43) Date of publication: 29.07.1992 Bulletin 1992/31 (21) Application number: 91914370.0 (22) Date of filing: 15.08.1991

(51) International Patent Classification (IPC):  E04B 1/ 343( . ) E04B 1/ 348( . ) E04B 1/ 344( . ) E04G 21/ 32( . ) (86) International application number: PCT/AU1991/000365 (87) International publication number: WO 1992/003627 (05.03.1992 Gazette 1992/06)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 15.08.1990 AU 19900001766 25.09.1990 AU 19900002498 (71) Applicant: PRESTON, John Clement Silverwater, NSW 2141 (AU)	(72) Inventor: PRESTON, John Clement Silverwater, NSW 2141 (AU) (74) Representative: Moir, Michael Christopher, et al  Mathys & Squire 100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB)