(19)

(11)

EP 0 648 302 A1

(12)

(43) Date of publication: 19.04.1995 Bulletin 1995/16 (21) Application number: 91912691.0 (22) Date of filing: 18.06.1991

(51) International Patent Classification (IPC):  E04B 1/ 34( . ) E04B 1/ 36( . ) E04B 5/ 48( . ) F24J 2/ 04( . ) E03C 1/ 00( . ) E04B 1/ 58( . ) E04C 2/ 52( . ) F24J 2/ 48( . ) (86) International application number: PCT/US1991/004141 (87) International publication number: WO 1991/019863 (26.12.1991 Gazette 1991/29)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 18.06.1990 US 19900539914 (71) Applicant: ZWEIBACH, Charles David 90610 Maale Adumin (IL)	(72) Inventor: ZWEIBACH, Charles David 90610 Maale Adumin (IL) (74) Representative: Dealtry, Brian  Eric Potter & Clarkson St. Mary's Court St. Mary's Gate Nottingham NG1 1LE Nottingham NG1 1LE (GB)