(19)
(11) EP 0 396 197 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.02.1991 Bulletin 1991/09

(43) Date of publication A2:
07.11.1990 Bulletin 1990/45

(21) Application number: 90201086.7

(22) Date of filing: 01.05.1990
(51) International Patent Classification (IPC)5: E21D 21/00
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR LI LU NL SE

(30) Priority: 04.05.1989 IT 2037589

(71) Applicant: CBK S.r.l.
I-22036 Erba Como (IT)

(72) Inventor:
  • Arnoldi, Luigi
    I-22036 Erba, Como (IT)

(74) Representative: De Carli, Erberto et al
ING. BARZANO & ZANARDO MILANO S.p.A. Via Borgonuovo, 10
20121 Milano
20121 Milano (IT)


(56) References cited: : 
   
       


    (54) Anchoring device for supporting excavations in rock


    (57) Anchoring device (10) for supporting excavations in rock constituted by a hollow screw-threaded tube (11) with which a nut (13) and a plate (14) are associated, and a section bar (12) provided with teeth (17) which are suitable for entering a plurality of openings (16) provided on the surface of the same tube; the section bar (12) is free to perform movements which shift it towards said tube, and, inversely, away from it, when the nut (13) with the plate (14) is respectively tightened (screwed down) or released (unscrewed).







    Search report