Patent ID: 7581714
Filing Date: 2009-09-01
Classification: B66F,E02B

Abstract:
1. A device for operating a structure by raising and lowering the structure relative to a support, by means of motorised pinions (A,B) integral with said structure, meshing into a fixed vertical rack (C) integral with said support, said device including a rack (C) cut on both sides ( 12 , 22 ), sandwiched between two leading pinions (A,B) with horizontal axes and arranged in substantially in the same horizontal plane, driven into opposite directions by a motorised system ( 2 ), wherein an outlet shaft ( 3 ) of said motorised system ( 2 ) transmits the driving motion to a primary reducing system ( 4 ) and an outlet shaft ( 5 ) of the reducing system ( 4 ) serves as an inlet shaft of a secondary reducing gear ( 6 ) of a planetary differential type including a solar pinion ( 7 ), satellite pinions ( 8 ) and an outer ring ( 14 ), wherein a satellite holder ( 9 ) of said secondary differential reducing gear ( 6 ) drives one of said pinions (A), on one of the sides ( 12 ) of said double rack (C), and the outer ring ( 14 ) of said planetary reducing gear ( 6 ) drives by a mechanical linking means ( 18 , 24 ), a toothed wheel ( 17 ) in charge in turn of driving the second pinion (B) on the other side ( 22 ) of said double rack (C).