(19)

(11)

EP 0 750 706 A1

(12)

(43) Date of publication: 02.01.1997 Bulletin 1997/01 (21) Application number: 95913625.0 (22) Date of filing: 14.03.1995

(51) International Patent Classification (IPC):  E04B 2/ 86( . ) E04B 2/ 02( . ) E04C 1/ 41( . ) (86) International application number: PCT/US1995/002973 (87) International publication number: WO 1995/025207 (21.09.1995 Gazette 1995/40)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 16.03.1994 CA 19942119180 (71) Applicant: Pruss, Donald E. Carmel, CA 93922-3160 (US)	(72) Inventor: Pruss, Donald E. Carmel, CA 93922-3160 (US) (74) Representative: Bonini, Ercole  c/o STUDIO ING. E. BONINI SRL Corso Fogazzaro 8 36100 Vicenza 36100 Vicenza (IT)