Patent ID: 6951442

Claim:
A device for examination, sampling or extraction of the contents of a silo ( 1 ) located under a slab ( 2 ) pierced by an opening ( 3 ), by an organ suspended from a support cable ( 8 ) and lowered through the opening ( 3 ), comprising at least three guide cables ( 11 ) located under the slab ( 2 ), converging towards a guide means ( 13 ) to which they are hooked at hooking points by crossing the slab ( 2 ) by drill holes ( 12 ) arranged in a crown and rolled on winches ( 10 ) driven by motors, a common control system ( 14 ) for the winches ( 10 , 9 ), the guide means being provided at a periphery thereof with concavities ( 65 ) for the support cable which alternate with the hooking points ( 60 ) of the guide cables ( 11 ), the concavities ( 65 ) of the guide means being defined by at least one sliding surface ( 63 ) and being concave when linking the hooking points ( 60 ) of the guide cables.