| 摘要 |
<p>Apparatus for elevating, laterally and rotationally positioning an aerial work platform relative to a support structure (10) such as a mobile vehicle. In one embodiment a platform (40) supporting carriage (60) is mounted for sliding movement along a support beam (50) affixed to a boom (20) and the platform is mounted on the carriage permitting rotation of the platform about a substantially vertical axis. In a second embodiment a four bar linkage is used for longitudinally moving a rotatable platform. One or more powered means (72) may be provided for elevating, leveling and longitudinally and rotationally positioning the work platform.
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