| 摘要 |
<p>Hoist systems (100, 200, 300, 400, 500, 600) are provided. In one embodiment, a hoist system (100, 200, 300, 400, 500, 600) includes a lower platform (102), an upper platform (104), a plurality of flexible members (115), and a plurality of hoists (113). The upper platform (104) has a plurality of rotatable support arms (112). The flexible members (115) connect the rotatable support arms (112) to the lower platform (104) and can be extended and retracted using the plurality of hoists (113). If desired, the upper platform (104) includes a plurality adjustable length support arms (112), and actuators (144) may be used to extend and retract the support arms (112).</p> |
