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US 5,314,083 AGranted
Telescopic tower
AssigneeMannesmann Aktiengesellschaft
InventorsFred Wiggershaus, Udo Steffen, Rudolf Erdmann
Life of this patent
Estimating the term…
Abstract
A telescopic tower for suspension from an overhang trolley, crane, or the like, have a lowermost tube for carrying a work area or platform, is constructed in that the tubes are of polygonal cross-section with inwardly, as well as outwardly projecting rails in corners of the polygon, rollers on the respective tubes run on these rails.
Claims7
In a multi tube telescopic tower for suspension from an overhang trolley, crane, or the like wherein the lowermost tube of a plurality of tubes carries a work area or platform, the improvement comprising:
- at least one (i) tube of the plurality of tubes of the telescopic tower being of multi part construction with a cross-section of a polygon, having corners accordingly, said (i) tube receiving another (ii) tube of the plurality of tubes and being received by a further (iii) tube of the plurality of tubes;
- said one (i) tube having rail means in at least one of said corners, said rail means extending radially inwardly, as well as radially outwardly from said corner;
- and
- rollers on the respective tubes (ii) and (iii) for cooperation with said rail means of said one (i) tube.
1 more element
Dependencies are inferred from the claim text.