| 摘要 |
PCT No. PCT/DE90/00094 Sec. 371 Date Dec. 7, 1990 Sec. 102(e) Date Dec. 7, 1990 PCT Filed Feb. 14, 1990 PCT Pub. No. WO90/10594 PCT Pub. Date Sep. 20, 1990.A jack with a single leg, with a lifting arm that pivots around a stationary horizontal axis on the leg, with a threaded shaft that is articulated to the leg and engages the lifting arm either directly or by way of lever arms articulated to the leg, and with a manually operated crank that has non-rotationally secured to its end a claw that has a transverse slot and sides that can be employed to attach the claw to a transverse bolt on the end of the shaft loosely enough to allow the crank to activate the shaft even when it is not aligned with it. The transverse slot (17) in the claw (18) slides over the transverse bolt (20) and, at the end of the side of the claw, has a width (X) no greater than the diameter (21) of the bolt, in that the claw fits loosely enough around the bolt to allow it to rotate, and in that the sides (19) of the claw have prongs (22) that loosely surround the threaded shaft. |
