Patent ID: 7850131
Filing Date: 2010-12-14
Classification: A61G,B66F

Abstract:
1. Telescopic column of the type comprising: two or more tubular members coaxial with one another and telescopically engaged one inside the other, defining a longitudinal axis (Y) along which they may be extended or withdrawn; a drive unit contained inside said tubular members; a cover attached to the end of the inner tubular member and arranged in last place along said longitudinal axis (Y) and in the sense of the extension of the tubular members; a supporting plate attached to the outside of said cover; a tubular rod associated with said drive unit and positioned longitudinally inside said tubular members, its end being associated with said cover; control means operatively connected to said drive unit for the controlled extension and withdrawal of said tubular members intended to achieve the raising and lowering of said supporting plate, said telescopic column comprising a safety device operatively connected to said control means so as to stop said drive unit during the withdrawal of said tubular rod inside said tubular members in the event of at least one counteracting elements (C) obstructing the lowering of said supporting plate, wherein said safety device comprises: a tubular sleeve attached to said cover and slidingly containing said end of said rod; at least one circuit breaker mechanically attached to said sleeve and electrically connected to said means for controlling said drive unit; means for tripping said circuit breaker attached to said end of said rod; at least one elastic assembly interposed between said means for tripping said circuit breaker and said cover.