(19)

(11)

EP 0 305 406 A1

(12)

(43) Date of publication: 08.03.1989 Bulletin 1989/10 (21) Application number: 87904310.0 (22) Date of filing: 19.06.1987

(51) International Patent Classification (IPC):  E01B 7/ 24( . ) E01B 19/ 00( . ) (86) International application number: PCT/IT1987/000065 (87) International publication number: WO 1988/007106 (22.09.1988 Gazette 1988/21)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL SE (30) Priority: 16.03.1987 IT 19870047730 (71) Applicant: PESCE, Luciano I-00040 Lavinio (IT)	(72) Inventor: PESCE, Luciano I-00040 Lavinio (IT) (74) Representative: Mascioli, Alessandro, Prof.Dr.  c/o A.N.D.I. Associazione Nazionale degli Inventori Via Urbana, 20 I-00184 Roma I-00184 Roma (IT)