| 摘要 |
<p>A portable lifting device (2) has upper and lower third-order levers (3, 4) pivoted about a fulcrum (5). The upper lever is adapted at its free end (6) to support a load. The lower lever (4) is pivotally connected at its free end to a base (8). A screw (12) and upper and lower arms (9, 10) are arranged to provide relative movement between the upper and lower arms (3, 4). The upper and lower arms (9, 10) are pivotally interconnected at respective ends. The free end of upper arm (11) is connected to the upper lever (3) between the fulcrum (5) and free end (6). The lower arm (10) is pivotally connected to the lower lever (4). The end of lower arm (10) extends beyond the lower lever (4) and is slidably supported by base (8). The screw (12) acts between the fulcrum (5) and the pivotal interconnection of the upper and lower arms (9, 10) to effect relative movement between upper and lower levers (3, 4). A multifunctional tool for use with the portable lifting device (2) has first and second outer arms (103, 104) pivotally linked to the opposite ends of a central member (105). A first tool (106) is formed at free end of the first outer arm (103) and a second dissimilar tool (107) is formed at the free end of the second outer arm (104). The first and second outer arms (103, 104) can be pivoted between positions in which they extend outwardly from central member (105) and positions in which they are generally aligned and at least partially coextensive with the central member (105).</p> |
