(19)

(11)

EP 0 698 147 A1

(12)

(43) Date of publication: 28.02.1996 Bulletin 1996/09 (21) Application number: 94914316.0 (22) Date of filing: 28.04.1994

(51) International Patent Classification (IPC):  E01B 9/ 68( . ) (86) International application number: PCT/DE1994/000496 (87) International publication number: WO 1994/025675 (10.11.1994 Gazette 1994/25)

(84) Designated Contracting States: AT BE CH DE ES FR GR IT LI NL PT (30) Priority: 28.04.1993 DE 19934314578 (71) Applicant: Wirthwein, Udo D-97993 Creglingen (DE)	(72) Inventor: Wirthwein, Udo D-97993 Creglingen (DE) (74) Representative: Effert, Udo, Dipl.-Ing.  Patentanwalt Radickestrasse 48 D-12489 Berlin D-12489 Berlin (DE)