Screw-driven vertically-elevating cab
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United States of America Patent
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Jan 28, 2014
Grant Date -
Jun 21, 2012
app pub date -
Dec 20, 2010
filing date -
Dec 20, 2010
priority date (Note) -
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Abstract
A lifting system for a vertically-elevating cab, the lifting system includes a frame assembly having a first and a second support column, first and a second lift screws which are attached to the, respective, first and second support columns, a cab-lifting beam that has a first and a second end attached to the, respective, first and second lift screws. A vertically-elevating cab is mounted on the cab-lifting beam in such a manner that a center of gravity of the cab is not aligned with a center of the cab-lifting beam. A plurality of rollers are located on each end of the lifting beam. Each one of the plurality of rollers is in contact with a guide bar on each of the respective first and second support columns, and a first and a second power system is connected to the, respective, first and second lift screw.
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