Aerial ladder

Abstract

Abstract This invention discloses an aerial ladder or lift apparatus including a fixed vertical column to be mounted on a transport vehicle of the usual type, the upper end of the upright column being provided with a ladder assembly, which ladder assembly is connected to a mechanism provided in the column to raise and lower the outer end thereof, there being provided a personnel platform at the outer end of said ladder to be raised and lowered therewith. The ladder assembly is of the telescopic type and arranged to move from a horizontal position by means of the interconnection of an intermediate portion of the ladder with the column mechanism, a portion of which is provided with hydraulic instrumentalities adapted to be extended and retracted. The combination of this arrangement with linkage intermediate a vertically fixed member in the column from which a link is connected to a point on the ladder will effect the raising and lowering described. The ladder unit is, by reason of the construction set forth, susceptible of being mounted on virtually any kind of transport vehicle and as an example adjacent the driver station with the column extending up through the roof of the body structure whether the same be a van or not, or at least adjacent such body structure, and still rotatable and swingable as stated, to provide for raising personnel directly on the platform or providing access to the platform by the ladder means provided, there being controls in or at the personnel platform and at the driver station for regulating movement of the respective parts as required to position the same where necessary.

Inventors

• 👤 Thomas R Hall

Bibliographic Details