| 摘要 |
A materials lifting apparatus for transporting materials, such as pipe between a derrick floor and a pipe rack, which comprises a support frame having a carriage receiving passageway therein, a carriage positionable within the carriage receiving passageway, and a forward linkage assembly pivotally connecting a first end portion of the carriage to the support frame, the forward linkage assembly being movable between a lowered position and a raised position, in the lowered position of the forward linkage assembly the carriage being disposed in a substantially horizontal position within the carriage receiving passageway of the support frame, in the raised position of the forward linkage assembly the first end portion of the carriage being disposed in a raised, longitudinally shifted position. The materials lifting apparatus is also provided with a track assembly operably connected to an opposed second end portion of the carriage such that as the forward linkage assembly is moved between the lowered position and the raised position the opposed second end portion of the carriage slidably moves in the carriage receiving passageway of the support frame.
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