(19)
(11) EP 2 177 668 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.12.2010 Bulletin 2010/48

(43) Date of publication A2:
21.04.2010 Bulletin 2010/16

(21) Application number: 09173064.8

(22) Date of filing: 14.10.2009
(51) International Patent Classification (IPC): 
E02D 29/12(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA RS

(30) Priority: 15.10.2008 IT RA20080029 U

(71) Applicant: Elettra S.R.L.
47023 Cesena (IT)

(72) Inventor:
  • Forlivesi, Ercole
    47023 Cesena (IT)

(74) Representative: Regnault de la Mothe, Hélène et al
Roncuzzi & Associati S.r.l. Via Antica Zecca, 6
48121 Ravenna
48121 Ravenna (IT)

   


(54) Manhole shaft


(57) A well for underground infrastructures comprising a substantially annular hollow body (10) delimiting laterally a respective space (5), and a closing device (20) carried by the body (10) and suitable to delimit superiorly the space (5); the body (10) being produced substantially in metal so as to present high breaking load but reduced weight.







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