(19)
(11) EP 0 378 972 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.04.1991 Bulletin 1991/14

(43) Date of publication A2:
25.07.1990 Bulletin 1990/30

(21) Application number: 89830367.2

(22) Date of filing: 22.08.1989
(51) International Patent Classification (IPC)5E21D 11/15
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR LI NL SE

(30) Priority: 20.01.1989 IT 1913289

(71) Applicant: Percivalli, Raffaele
I-06049 Spoleto (Perugia) (IT)

(72) Inventor:
  • Percivalli, Raffaele
    I-06049 Spoleto (Perugia) (IT)

(74) Representative: Cicogna, Franco 
Ufficio Internazionale Brevetti Dott.Prof. Franco Cicogna Via Visconti di Modrone, 14/A
20122 Milano
20122 Milano (IT)


(56) References cited: : 
   
       


    (54) Grid lagging for a tunnel lining


    (57) Net grid lagging for road tunnels or the like, characterized in that it comprises a plurality of preformed panels (1) made of a metal net grid assembly which is provided, on two opposite sides thereof, with ccoupling members (2,4,5) for engaging with two side longitudinal guides (10) supported between the ribs of a supporting frame.







    Search report