(19)

(11)

EP 0 817 899 A2

(12)

(43) Date of publication: 14.01.1998 Bulletin 1998/03 (21) Application number: 96912396.0 (22) Date of filing: 05.02.1996

(51) International Patent Classification (IPC):  E04H 15/ 20( . ) (86) International application number: PCT/US1996/001722 (87) International publication number: WO 1996/025572 (22.08.1996 Gazette 1996/38)

(84) Designated Contracting States: AT BE CH DE DK FR GB GR IE IT LI NL PT SE (30) Priority: 06.02.1995 US A 384664 12.06.1995 US A 489549 31.01.1996 US A 594142 (71) Applicant: Simens, Robert R. Solon, OH 44139 (US)	(72) Inventor: Simens, Robert R. Solon, OH 44139 (US) (74) Representative: Dawson, Elizabeth Ann  A.A. THORNTON & CO. Northumberland House 303-306 High Holborn London WC1V 7LE London WC1V 7LE (GB)