(19)

(11)

EP 0 726 998 A1

(12)

(43) Date of publication: 21.08.1996 Bulletin 1996/34 (21) Application number: 94932040.0 (22) Date of filing: 24.10.1994

(51) International Patent Classification (IPC):  E04H 4/ 16( . ) (86) International application number: PCT/US1994/012253 (87) International publication number: WO 1995/012730 (11.05.1995 Gazette 1995/20)

(84) Designated Contracting States: DE ES FR GB IT SE (30) Priority: 03.11.1993 US 19930147993 (71) Applicant: STA-RITE INDUSTRIES, INC. Delavan, WI 53115 (US)	(72) Inventors: RIEF, Dieter, J. Santa Rosa, CA 95404 (US) FRENTZEL, Herman, E. Sausalito, CA 94965 (US) SEBOR, Pavel Johannesburg, Transvall (ZA) (74) Representative: Fleck, Hermann-Josef, Dr.-Ing.  Patentanwaltsbüro A. Jeck & H.-J. Fleck Markgröninger Strasse 47/1 71701 Schwieberdingen 71701 Schwieberdingen (DE)