| 摘要 |
A jack stand for supporting a lifting jack beneath a work piece to be raised or lowered. The jack stand includes a base movable along a floor surface, and a jack support platform supported in elevated relation above the base. Struts are pivotably connected to the jack support platform and extend downwardly to engage the base, transferring a portion of the weight of the jack to the base. Those support struts are displaceable when the base is positioned beneath an interfering machine structure, allowing that structure to fit within the open space between the base and the jack support platform, so that the jack stand can fit beneath a work piece notwithstanding the interfering structure.
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